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-rw-r--r--src/lib/stats/Makefile.am28
-rw-r--r--src/lib/stats/Makefile.in954
-rw-r--r--src/lib/stats/context.cc99
-rw-r--r--src/lib/stats/context.h90
-rw-r--r--src/lib/stats/observation.cc506
-rw-r--r--src/lib/stats/observation.h445
-rw-r--r--src/lib/stats/stats.dox16
-rw-r--r--src/lib/stats/stats_mgr.cc645
-rw-r--r--src/lib/stats/stats_mgr.h789
-rw-r--r--src/lib/stats/tests/Makefile.am35
-rw-r--r--src/lib/stats/tests/Makefile.in1017
-rw-r--r--src/lib/stats/tests/context_unittest.cc126
-rw-r--r--src/lib/stats/tests/observation_unittest.cc619
-rw-r--r--src/lib/stats/tests/run_unittests.cc18
-rw-r--r--src/lib/stats/tests/stats_mgr_unittest.cc1117
-rw-r--r--src/lib/stats/testutils/Makefile.am1
-rw-r--r--src/lib/stats/testutils/Makefile.in524
-rw-r--r--src/lib/stats/testutils/stats_test_utils.h64
18 files changed, 7093 insertions, 0 deletions
diff --git a/src/lib/stats/Makefile.am b/src/lib/stats/Makefile.am
new file mode 100644
index 0000000..37f3e41
--- /dev/null
+++ b/src/lib/stats/Makefile.am
@@ -0,0 +1,28 @@
+SUBDIRS = . tests testutils
+
+AM_CPPFLAGS = -I$(top_srcdir)/src/lib -I$(top_builddir)/src/lib
+AM_CPPFLAGS += $(BOOST_INCLUDES)
+AM_CXXFLAGS = $(KEA_CXXFLAGS)
+
+lib_LTLIBRARIES = libkea-stats.la
+libkea_stats_la_SOURCES = observation.h observation.cc
+libkea_stats_la_SOURCES += context.h context.cc
+libkea_stats_la_SOURCES += stats_mgr.h stats_mgr.cc
+
+libkea_stats_la_CPPFLAGS = $(AM_CPPFLAGS)
+libkea_stats_la_LDFLAGS = -no-undefined -version-info 18:0:0
+
+libkea_stats_la_LIBADD = $(top_builddir)/src/lib/cc/libkea-cc.la
+libkea_stats_la_LIBADD += $(top_builddir)/src/lib/asiolink/libkea-asiolink.la
+libkea_stats_la_LIBADD += $(top_builddir)/src/lib/util/libkea-util.la
+libkea_stats_la_LIBADD += $(top_builddir)/src/lib/exceptions/libkea-exceptions.la
+libkea_stats_la_LIBADD += $(BOOST_LIBS)
+
+EXTRA_DIST = stats.dox
+
+libkea_stats_includedir = $(pkgincludedir)/stats
+libkea_stats_include_HEADERS = \
+ context.h \
+ observation.h \
+ stats_mgr.h
+
diff --git a/src/lib/stats/Makefile.in b/src/lib/stats/Makefile.in
new file mode 100644
index 0000000..79d5d4f
--- /dev/null
+++ b/src/lib/stats/Makefile.in
@@ -0,0 +1,954 @@
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+dvi-am:
+
+html: html-recursive
+
+html-am:
+
+info: info-recursive
+
+info-am:
+
+install-data-am: install-libkea_stats_includeHEADERS
+
+install-dvi: install-dvi-recursive
+
+install-dvi-am:
+
+install-exec-am: install-libLTLIBRARIES
+
+install-html: install-html-recursive
+
+install-html-am:
+
+install-info: install-info-recursive
+
+install-info-am:
+
+install-man:
+
+install-pdf: install-pdf-recursive
+
+install-pdf-am:
+
+install-ps: install-ps-recursive
+
+install-ps-am:
+
+installcheck-am:
+
+maintainer-clean: maintainer-clean-recursive
+ -rm -f ./$(DEPDIR)/libkea_stats_la-context.Plo
+ -rm -f ./$(DEPDIR)/libkea_stats_la-observation.Plo
+ -rm -f ./$(DEPDIR)/libkea_stats_la-stats_mgr.Plo
+ -rm -f Makefile
+maintainer-clean-am: distclean-am maintainer-clean-generic
+
+mostlyclean: mostlyclean-recursive
+
+mostlyclean-am: mostlyclean-compile mostlyclean-generic \
+ mostlyclean-libtool
+
+pdf: pdf-recursive
+
+pdf-am:
+
+ps: ps-recursive
+
+ps-am:
+
+uninstall-am: uninstall-libLTLIBRARIES \
+ uninstall-libkea_stats_includeHEADERS
+
+.MAKE: $(am__recursive_targets) install-am install-strip
+
+.PHONY: $(am__recursive_targets) CTAGS GTAGS TAGS all all-am \
+ am--depfiles check check-am clean clean-generic \
+ clean-libLTLIBRARIES clean-libtool cscopelist-am ctags \
+ ctags-am distclean distclean-compile distclean-generic \
+ distclean-libtool distclean-tags distdir dvi dvi-am html \
+ html-am info info-am install install-am install-data \
+ install-data-am install-dvi install-dvi-am install-exec \
+ install-exec-am install-html install-html-am install-info \
+ install-info-am install-libLTLIBRARIES \
+ install-libkea_stats_includeHEADERS install-man install-pdf \
+ install-pdf-am install-ps install-ps-am install-strip \
+ installcheck installcheck-am installdirs installdirs-am \
+ maintainer-clean maintainer-clean-generic mostlyclean \
+ mostlyclean-compile mostlyclean-generic mostlyclean-libtool \
+ pdf pdf-am ps ps-am tags tags-am uninstall uninstall-am \
+ uninstall-libLTLIBRARIES uninstall-libkea_stats_includeHEADERS
+
+.PRECIOUS: Makefile
+
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/src/lib/stats/context.cc b/src/lib/stats/context.cc
new file mode 100644
index 0000000..697b3de
--- /dev/null
+++ b/src/lib/stats/context.cc
@@ -0,0 +1,99 @@
+// Copyright (C) 2015-2020 Internet Systems Consortium, Inc. ("ISC")
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+#include <config.h>
+
+#include <stats/context.h>
+#include <util/multi_threading_mgr.h>
+#include <map>
+
+using namespace std;
+using namespace isc::data;
+using namespace isc::util;
+
+namespace isc {
+namespace stats {
+
+ObservationPtr
+StatContext::get(const std::string& name) const {
+ auto obs = stats_.find(name);
+ if (obs != stats_.end()) {
+ return (obs->second);
+ }
+ return (ObservationPtr());
+}
+
+void
+StatContext::add(const ObservationPtr& obs) {
+ auto existing = stats_.find(obs->getName());
+ if (existing == stats_.end()) {
+ stats_.insert(make_pair(obs->getName() ,obs));
+ } else {
+ isc_throw(DuplicateStat, "Statistic named " << obs->getName()
+ << " already exists.");
+ }
+}
+
+bool
+StatContext::del(const std::string& name) {
+ auto obs = stats_.find(name);
+ if (obs != stats_.end()) {
+ stats_.erase(obs);
+ return (true);
+ }
+ return (false);
+}
+
+size_t
+StatContext::size() {
+ return (stats_.size());
+}
+
+void
+StatContext::clear() {
+ stats_.clear();
+}
+
+void
+StatContext::resetAll() {
+ // Let's iterate over all stored statistics...
+ for (auto s : stats_) {
+ // ... and reset each statistic.
+ s.second->reset();
+ }
+}
+
+ConstElementPtr
+StatContext::getAll() const {
+ ElementPtr map = Element::createMap(); // a map
+ // Let's iterate over all stored statistics...
+ for (auto s : stats_) {
+ // ... and add each of them to the map.
+ map->set(s.first, s.second->getJSON());
+ }
+ return (map);
+}
+
+void
+StatContext::setMaxSampleCountAll(uint32_t max_samples) {
+ // Let's iterate over all stored statistics...
+ for (auto s : stats_) {
+ // ... and set count limit for each statistic.
+ s.second->setMaxSampleCount(max_samples);
+ }
+}
+
+void
+StatContext::setMaxSampleAgeAll(const StatsDuration& duration) {
+ // Let's iterate over all stored statistics...
+ for (auto s : stats_) {
+ // ... and set duration limit for each statistic.
+ s.second->setMaxSampleAge(duration);
+ }
+}
+
+} // namespace stats
+} // namespace isc
diff --git a/src/lib/stats/context.h b/src/lib/stats/context.h
new file mode 100644
index 0000000..117872f
--- /dev/null
+++ b/src/lib/stats/context.h
@@ -0,0 +1,90 @@
+// Copyright (C) 2015-2020 Internet Systems Consortium, Inc. ("ISC")
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+#ifndef CONTEXT_H
+#define CONTEXT_H
+
+#include <stats/observation.h>
+#include <boost/shared_ptr.hpp>
+#include <mutex>
+#include <string>
+
+namespace isc {
+namespace stats {
+
+/// @brief Exception indicating that a given statistic is duplicated.
+class DuplicateStat : public Exception {
+public:
+ DuplicateStat(const char* file, size_t line, const char* what) :
+ isc::Exception(file, line, what) {}
+};
+
+/// @brief Statistics context
+///
+/// Statistics context is essentially a container used to group statistics
+/// related to a given context together. Two examples of such contexts are
+/// all statistics related to a given subnet or all statistics related to a
+/// given network interface.
+struct StatContext {
+public:
+
+ /// @brief Attempts to get an observation
+ ///
+ /// @param name name of the statistic
+ /// @return appropriate Observation object (or NULL)
+ ObservationPtr get(const std::string& name) const;
+
+ /// @brief Adds a new observation
+ ///
+ /// @param obs observation to be added
+ /// @throw DuplicateStat if an observation with the same name exists already
+ void add(const ObservationPtr& obs);
+
+ /// @brief Attempts to delete an observation
+ ///
+ /// @param name name of the observation to be deleted
+ /// @return true if successful, false if no such statistic was found
+ bool del(const std::string& name);
+
+ /// @brief Returns the number of observations
+ ///
+ /// @return the number of observations
+ size_t size();
+
+ /// @brief Removes all observations
+ void clear();
+
+ /// @brief Resets all observations
+ void resetAll();
+
+ /// @brief Sets max sample count for all observations
+ ///
+ /// @param max_samples value to be set for all observations
+ void setMaxSampleCountAll(uint32_t max_samples);
+
+ /// @brief Sets duration for all observations
+ ///
+ /// @param duration value to be set for all observations
+ void setMaxSampleAgeAll(const StatsDuration& duration);
+
+ /// @brief Returns a map with all observations
+ ///
+ /// @return map with all observations
+ isc::data::ConstElementPtr getAll() const;
+
+private:
+
+ /// @brief Statistics container
+ std::map<std::string, ObservationPtr> stats_;
+};
+
+/// @brief Pointer to the statistics context
+typedef boost::shared_ptr<StatContext> StatContextPtr;
+
+};
+};
+
+#endif // CONTEXT_H
diff --git a/src/lib/stats/observation.cc b/src/lib/stats/observation.cc
new file mode 100644
index 0000000..2128f53
--- /dev/null
+++ b/src/lib/stats/observation.cc
@@ -0,0 +1,506 @@
+// Copyright (C) 2015-2020 Internet Systems Consortium, Inc. ("ISC")
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+#include <config.h>
+
+#include <stats/observation.h>
+#include <util/chrono_time_utils.h>
+#include <cc/data.h>
+#include <chrono>
+#include <utility>
+
+using namespace std;
+using namespace std::chrono;
+using namespace isc::data;
+
+namespace isc {
+namespace stats {
+
+std::pair<bool, uint32_t>
+Observation::default_max_sample_count_ = std::make_pair(true, 20);
+
+std::pair<bool, StatsDuration>
+Observation::default_max_sample_age_ =
+ std::make_pair(false, StatsDuration::zero());
+
+Observation::Observation(const std::string& name, const int64_t value) :
+ name_(name), type_(STAT_INTEGER),
+ max_sample_count_(default_max_sample_count_),
+ max_sample_age_(default_max_sample_age_) {
+ setValue(value);
+}
+
+Observation::Observation(const std::string& name, const double value) :
+ name_(name), type_(STAT_FLOAT),
+ max_sample_count_(default_max_sample_count_),
+ max_sample_age_(default_max_sample_age_) {
+ setValue(value);
+}
+
+Observation::Observation(const std::string& name, const StatsDuration& value) :
+ name_(name), type_(STAT_DURATION),
+ max_sample_count_(default_max_sample_count_),
+ max_sample_age_(default_max_sample_age_) {
+ setValue(value);
+}
+
+Observation::Observation(const std::string& name, const std::string& value) :
+ name_(name), type_(STAT_STRING),
+ max_sample_count_(default_max_sample_count_),
+ max_sample_age_(default_max_sample_age_) {
+ setValue(value);
+}
+
+void Observation::setMaxSampleAge(const StatsDuration& duration) {
+ switch(type_) {
+ case STAT_INTEGER: {
+ setMaxSampleAgeInternal(integer_samples_, duration, STAT_INTEGER);
+ return;
+ }
+ case STAT_FLOAT: {
+ setMaxSampleAgeInternal(float_samples_, duration, STAT_FLOAT);
+ return;
+ }
+ case STAT_DURATION: {
+ setMaxSampleAgeInternal(duration_samples_, duration, STAT_DURATION);
+ return;
+ }
+ case STAT_STRING: {
+ setMaxSampleAgeInternal(string_samples_, duration, STAT_STRING);
+ return;
+ }
+ default:
+ isc_throw(InvalidStatType, "Unknown statistic type: "
+ << typeToText(type_));
+ };
+}
+
+void Observation::setMaxSampleCount(uint32_t max_samples) {
+ switch(type_) {
+ case STAT_INTEGER: {
+ setMaxSampleCountInternal(integer_samples_, max_samples, STAT_INTEGER);
+ return;
+ }
+ case STAT_FLOAT: {
+ setMaxSampleCountInternal(float_samples_, max_samples, STAT_FLOAT);
+ return;
+ }
+ case STAT_DURATION: {
+ setMaxSampleCountInternal(duration_samples_, max_samples, STAT_DURATION);
+ return;
+ }
+ case STAT_STRING: {
+ setMaxSampleCountInternal(string_samples_, max_samples, STAT_STRING);
+ return;
+ }
+ default:
+ isc_throw(InvalidStatType, "Unknown statistic type: "
+ << typeToText(type_));
+ };
+}
+
+void Observation::addValue(const int64_t value) {
+ IntegerSample current = getInteger();
+ setValue(current.first + value);
+}
+
+void Observation::addValue(const double value) {
+ FloatSample current = getFloat();
+ setValue(current.first + value);
+}
+
+void Observation::addValue(const StatsDuration& value) {
+ DurationSample current = getDuration();
+ setValue(current.first + value);
+}
+
+void Observation::addValue(const std::string& value) {
+ StringSample current = getString();
+ setValue(current.first + value);
+}
+
+void Observation::setValue(const int64_t value) {
+ setValueInternal(value, integer_samples_, STAT_INTEGER);
+}
+
+void Observation::setValue(const double value) {
+ setValueInternal(value, float_samples_, STAT_FLOAT);
+}
+
+void Observation::setValue(const StatsDuration& value) {
+ setValueInternal(value, duration_samples_, STAT_DURATION);
+}
+
+void Observation::setValue(const std::string& value) {
+ setValueInternal(value, string_samples_, STAT_STRING);
+}
+
+size_t Observation::getSize() const {
+ size_t size = 0;
+ switch(type_) {
+ case STAT_INTEGER: {
+ size = getSizeInternal(integer_samples_, STAT_INTEGER);
+ return (size);
+ }
+ case STAT_FLOAT: {
+ size = getSizeInternal(float_samples_, STAT_FLOAT);
+ return (size);
+ }
+ case STAT_DURATION: {
+ size = getSizeInternal(duration_samples_, STAT_DURATION);
+ return (size);
+ }
+ case STAT_STRING: {
+ size = getSizeInternal(string_samples_, STAT_STRING);
+ return (size);
+ }
+ default:
+ isc_throw(InvalidStatType, "Unknown statistic type: "
+ << typeToText(type_));
+ };
+ return (size);
+}
+
+std::pair<bool, StatsDuration> Observation::getMaxSampleAge() const {
+ return (max_sample_age_);
+}
+
+std::pair<bool, uint32_t> Observation::getMaxSampleCount() const {
+ return (max_sample_count_);
+}
+
+template<typename StorageType>
+size_t Observation::getSizeInternal(StorageType& storage, Type exp_type) const {
+ if (type_ != exp_type) {
+ isc_throw(InvalidStatType, "Invalid statistic type requested: "
+ << typeToText(exp_type) << ", but the actual type is "
+ << typeToText(type_));
+ } else {
+ return (storage.size());
+ }
+ return (0); // to avoid compilation error
+}
+
+template<typename SampleType, typename StorageType>
+void Observation::setValueInternal(SampleType value, StorageType& storage,
+ Type exp_type) {
+ if (type_ != exp_type) {
+ isc_throw(InvalidStatType, "Invalid statistic type requested: "
+ << typeToText(exp_type) << ", but the actual type is "
+ << typeToText(type_));
+ }
+
+ if (storage.empty()) {
+ storage.push_back(make_pair(value, SampleClock::now()));
+ } else {
+ // Storing of more than one sample
+ storage.push_front(make_pair(value, SampleClock::now()));
+
+ if (max_sample_count_.first) {
+ // if max_sample_count_ is set to true
+ // and size of storage is equal to max_sample_count_
+ if (storage.size() > max_sample_count_.second) {
+ storage.pop_back(); // removing the last element
+ }
+ } else {
+ StatsDuration range_of_storage =
+ storage.front().second - storage.back().second;
+ // removing samples until the range_of_storage
+ // stops exceeding the duration limit
+ while (range_of_storage > max_sample_age_.second) {
+ storage.pop_back();
+ range_of_storage =
+ storage.front().second - storage.back().second;
+ }
+ }
+ }
+}
+
+IntegerSample Observation::getInteger() const {
+ return (getValueInternal<IntegerSample>(integer_samples_, STAT_INTEGER));
+}
+
+FloatSample Observation::getFloat() const {
+ return (getValueInternal<FloatSample>(float_samples_, STAT_FLOAT));
+}
+
+DurationSample Observation::getDuration() const {
+ return (getValueInternal<DurationSample>(duration_samples_, STAT_DURATION));
+}
+
+StringSample Observation::getString() const {
+ return (getValueInternal<StringSample>(string_samples_, STAT_STRING));
+}
+
+template<typename SampleType, typename Storage>
+SampleType Observation::getValueInternal(Storage& storage, Type exp_type) const {
+ if (type_ != exp_type) {
+ isc_throw(InvalidStatType, "Invalid statistic type requested: "
+ << typeToText(exp_type) << ", but the actual type is "
+ << typeToText(type_));
+ }
+
+ if (storage.empty()) {
+ // That should never happen. The first element is always initialized in
+ // the constructor. reset() sets its value to zero, but the element should
+ // still be there.
+ isc_throw(Unexpected, "Observation storage container empty");
+ }
+ return (*storage.begin());
+}
+
+std::list<IntegerSample> Observation::getIntegers() const {
+ return (getValuesInternal<IntegerSample>(integer_samples_, STAT_INTEGER));
+}
+
+std::list<FloatSample> Observation::getFloats() const {
+ return (getValuesInternal<FloatSample>(float_samples_, STAT_FLOAT));
+}
+
+std::list<DurationSample> Observation::getDurations() const {
+ return (getValuesInternal<DurationSample>(duration_samples_, STAT_DURATION));
+}
+
+std::list<StringSample> Observation::getStrings() const {
+ return (getValuesInternal<StringSample>(string_samples_, STAT_STRING));
+}
+
+template<typename SampleType, typename Storage>
+std::list<SampleType> Observation::getValuesInternal(Storage& storage,
+ Type exp_type) const {
+ if (type_ != exp_type) {
+ isc_throw(InvalidStatType, "Invalid statistic type requested: "
+ << typeToText(exp_type) << ", but the actual type is "
+ << typeToText(type_));
+ }
+
+ if (storage.empty()) {
+ // That should never happen. The first element is always initialized in
+ // the constructor. reset() sets its value to zero, but the element should
+ // still be there.
+ isc_throw(Unexpected, "Observation storage container empty");
+ }
+ return (storage);
+}
+
+template<typename StorageType>
+void Observation::setMaxSampleAgeInternal(StorageType& storage,
+ const StatsDuration& duration,
+ Type exp_type) {
+ if (type_ != exp_type) {
+ isc_throw(InvalidStatType, "Invalid statistic type requested: "
+ << typeToText(exp_type) << ", but the actual type is "
+ << typeToText(type_));
+ }
+ // setting new value of max_sample_age_
+ max_sample_age_.first = true;
+ max_sample_age_.second = duration;
+ // deactivating the max_sample_count_ limit
+ max_sample_count_.first = false;
+
+ StatsDuration range_of_storage =
+ storage.front().second - storage.back().second;
+
+ while (range_of_storage > duration) {
+ // deleting elements which are exceeding the duration limit
+ storage.pop_back();
+ range_of_storage = storage.front().second - storage.back().second;
+ }
+}
+
+template<typename StorageType>
+void Observation::setMaxSampleCountInternal(StorageType& storage,
+ uint32_t max_samples,
+ Type exp_type) {
+ if (type_ != exp_type) {
+ isc_throw(InvalidStatType, "Invalid statistic type requested: "
+ << typeToText(exp_type) << ", but the actual type is "
+ << typeToText(type_));
+ }
+ // Should we refuse the max_samples = 0 value here?
+ // setting new value of max_sample_count_
+ max_sample_count_.first = true;
+ max_sample_count_.second = max_samples;
+ // deactivating the max_sample_age_ limit
+ max_sample_age_.first = false;
+
+ while (storage.size() > max_samples) {
+ // deleting elements which are exceeding the max_samples limit
+ storage.pop_back();
+ }
+}
+
+void Observation::setMaxSampleAgeDefault(const StatsDuration& duration) {
+ // setting new value of default_max_sample_age_
+ default_max_sample_age_.second = duration;
+}
+
+void Observation::setMaxSampleCountDefault(uint32_t max_samples) {
+ if (max_samples == 0) {
+ // deactivating the default_max_sample_count_ limit
+ default_max_sample_count_.first = false;
+ default_max_sample_age_.first = true;
+ } else {
+ // setting new value of default_max_sample_count_
+ default_max_sample_count_.second = max_samples;
+ // deactivating the default_max_sample_age_ limit
+ default_max_sample_age_.first = false;
+ default_max_sample_count_.first = true;
+ }
+}
+
+const StatsDuration& Observation::getMaxSampleAgeDefault() {
+ return (default_max_sample_age_.second);
+}
+
+uint32_t Observation::getMaxSampleCountDefault() {
+ if (default_max_sample_count_.first) {
+ return (default_max_sample_count_.second);
+ } else {
+ return (0);
+ }
+}
+
+std::string Observation::typeToText(Type type) {
+ std::stringstream tmp;
+ switch (type) {
+ case STAT_INTEGER:
+ tmp << "integer";
+ break;
+ case STAT_FLOAT:
+ tmp << "float";
+ break;
+ case STAT_DURATION:
+ tmp << "duration";
+ break;
+ case STAT_STRING:
+ tmp << "string";
+ break;
+ default:
+ tmp << "unknown";
+ break;
+ }
+ tmp << "(" << type << ")";
+ return (tmp.str());
+}
+
+isc::data::ConstElementPtr
+Observation::getJSON() const {
+
+ ElementPtr list = isc::data::Element::createList(); // multiple observations
+ ElementPtr entry;
+ ElementPtr value;
+ ElementPtr timestamp;
+
+ // Support for retrieving more than one sample
+ // retrieving all samples of indicated observation
+ switch (type_) {
+ case STAT_INTEGER: {
+ std::list<IntegerSample> s = getIntegers(); // List of all integer samples
+
+ // Iteration over all elements in the list
+ // and adding alternately value and timestamp to the entry
+ for (std::list<IntegerSample>::iterator it = s.begin(); it != s.end(); ++it) {
+ entry = isc::data::Element::createList();
+ value = isc::data::Element::create(static_cast<int64_t>((*it).first));
+ timestamp = isc::data::Element::create(isc::util::clockToText((*it).second));
+
+ entry->add(value);
+ entry->add(timestamp);
+
+ list->add(entry);
+ }
+ break;
+ }
+ case STAT_FLOAT: {
+ std::list<FloatSample> s = getFloats();
+
+ // Iteration over all elements in the list
+ // and adding alternately value and timestamp to the entry
+ for (std::list<FloatSample>::iterator it = s.begin(); it != s.end(); ++it) {
+ entry = isc::data::Element::createList();
+ value = isc::data::Element::create((*it).first);
+ timestamp = isc::data::Element::create(isc::util::clockToText((*it).second));
+
+ entry->add(value);
+ entry->add(timestamp);
+
+ list->add(entry);
+ }
+ break;
+ }
+ case STAT_DURATION: {
+ std::list<DurationSample> s = getDurations();
+
+ // Iteration over all elements in the list
+ // and adding alternately value and timestamp to the entry
+ for (std::list<DurationSample>::iterator it = s.begin(); it != s.end(); ++it) {
+ entry = isc::data::Element::createList();
+ value = isc::data::Element::create(isc::util::durationToText((*it).first));
+ timestamp = isc::data::Element::create(isc::util::clockToText((*it).second));
+
+ entry->add(value);
+ entry->add(timestamp);
+
+ list->add(entry);
+ }
+ break;
+ }
+ case STAT_STRING: {
+ std::list<StringSample> s = getStrings();
+
+ // Iteration over all elements in the list
+ // and adding alternately value and timestamp to the entry
+ for (std::list<StringSample>::iterator it = s.begin(); it != s.end(); ++it) {
+ entry = isc::data::Element::createList();
+ value = isc::data::Element::create((*it).first);
+ timestamp = isc::data::Element::create(isc::util::clockToText((*it).second));
+
+ entry->add(value);
+ entry->add(timestamp);
+
+ list->add(entry);
+ }
+ break;
+ }
+ default:
+ isc_throw(InvalidStatType, "Unknown statistic type: "
+ << typeToText(type_));
+ };
+
+ return (list);
+}
+
+void Observation::reset() {
+ switch(type_) {
+ case STAT_INTEGER: {
+ integer_samples_.clear();
+ setValue(static_cast<int64_t>(0));
+ return;
+ }
+ case STAT_FLOAT: {
+ float_samples_.clear();
+ setValue(0.0);
+ return;
+ }
+ case STAT_DURATION: {
+ duration_samples_.clear();
+ setValue(StatsDuration::zero());
+ return;
+ }
+ case STAT_STRING: {
+ string_samples_.clear();
+ setValue(string(""));
+ return;
+ }
+ default:
+ isc_throw(InvalidStatType, "Unknown statistic type: "
+ << typeToText(type_));
+ };
+}
+
+} // end of namespace stats
+} // end of namespace isc
diff --git a/src/lib/stats/observation.h b/src/lib/stats/observation.h
new file mode 100644
index 0000000..f1e0117
--- /dev/null
+++ b/src/lib/stats/observation.h
@@ -0,0 +1,445 @@
+// Copyright (C) 2015-2020 Internet Systems Consortium, Inc. ("ISC")
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+#ifndef OBSERVATION_H
+#define OBSERVATION_H
+
+#include <cc/data.h>
+#include <exceptions/exceptions.h>
+#include <boost/shared_ptr.hpp>
+#include <chrono>
+#include <list>
+#include <stdint.h>
+
+namespace isc {
+namespace stats {
+
+/// @brief Exception thrown if invalid statistic type is used
+///
+/// For example statistic is of type duration, but methods using
+/// it as integer are called.
+class InvalidStatType : public Exception {
+public:
+ InvalidStatType(const char* file, size_t line, const char* what) :
+ isc::Exception(file, line, what) {}
+};
+
+/// @brief Define clock type.
+///
+/// @note: we use the system clock i.e. the wall clock because this
+/// clock can be converted from and to standard Unix time (time_t).
+typedef std::chrono::system_clock SampleClock;
+
+/// @brief Defines duration type.
+///
+/// @note: the precision depends on the system,
+typedef std::chrono::system_clock::duration StatsDuration;
+
+/// @brief Returns the number of seconds in a duration.
+///
+/// @param dur The duration.
+/// @return The number of seconds in the given duration.
+inline long toSeconds(const StatsDuration& dur) {
+ return ((std::chrono::duration_cast<std::chrono::seconds>(dur)).count());
+}
+
+/// @defgroup stat_samples Specifies supported observation types.
+///
+/// @brief The list covers all supported types of observations.
+///
+/// @{
+
+/// @brief Integer (implemented as signed 64-bit integer)
+typedef std::pair<int64_t, SampleClock::time_point> IntegerSample;
+
+/// @brief Float (implemented as double precision)
+typedef std::pair<double, SampleClock::time_point> FloatSample;
+
+/// @brief Time Duration
+typedef std::pair<StatsDuration, SampleClock::time_point> DurationSample;
+
+/// @brief String
+typedef std::pair<std::string, SampleClock::time_point> StringSample;
+
+/// @}
+
+/// @brief Represents a single observable characteristic (a 'statistic')
+///
+/// Currently it supports one of four types: integer (implemented as signed 64
+/// bit integer), float (implemented as double), time duration (implemented with
+/// millisecond precision) and string. Absolute (setValue) and
+/// incremental (addValue) modes are supported. Statistic type is determined
+/// during its first use. Once type is set, any additional observations recorded
+/// must be of the same type. Attempting to set or extract information about
+/// other types will result in InvalidStateType exception.
+///
+/// Observation can be retrieved in one of @ref getInteger, @ref getFloat,
+/// @ref getDuration, @ref getString (appropriate type must be used) or
+/// @ref getJSON, which is generic and can be used for all types.
+///
+/// Since Kea 1.6 multiple samples are stored for the same observation.
+class Observation {
+public:
+
+ /// @brief Type of available statistics
+ ///
+ /// Note that those will later be exposed using control socket. Therefore
+ /// an easy to understand names were chosen (integer instead of uint64).
+ /// To avoid confusion, we will support only one type of integer and only
+ /// one type of floating points. Initially, these are represented by
+ /// int64_t and double. If convincing use cases appear to change them
+ /// to something else, we may change the underlying type.
+ enum Type {
+ STAT_INTEGER, ///< this statistic is unsigned 64-bit integer value
+ STAT_FLOAT, ///< this statistic is a floating point value
+ STAT_DURATION,///< this statistic represents time duration
+ STAT_STRING ///< this statistic represents a string
+ };
+
+ /// @brief Constructor for integer observations
+ ///
+ /// @param name observation name
+ /// @param value integer value observed.
+ Observation(const std::string& name, const int64_t value);
+
+ /// @brief Constructor for floating point observations
+ ///
+ /// @param name observation name
+ /// @param value floating point value observed.
+ Observation(const std::string& name, const double value);
+
+ /// @brief Constructor for duration observations
+ ///
+ /// @param name observation name
+ /// @param value duration observed.
+ Observation(const std::string& name, const StatsDuration& value);
+
+ /// @brief Constructor for string observations
+ ///
+ /// @param name observation name
+ /// @param value string observed.
+ Observation(const std::string& name, const std::string& value);
+
+ /// @brief Determines maximum age of samples.
+ ///
+ /// Specifies that statistic name should be stored not as a single value,
+ /// but rather as a set of values. The duration determines the timespan.
+ /// Samples older than duration will be discarded. This is time-constrained
+ /// approach. For sample count constrained approach, see @ref
+ /// setMaxSampleCount() below.
+ ///
+ ///
+ /// @param duration determines maximum age of samples
+ /// Example:
+ /// To set a statistic to keep observations for the last 5 minutes, call:
+ /// setMaxSampleAge(std::chrono::minutes(5));
+ /// To revert statistic to a single value, call:
+ /// setMaxSampleAge(StatsDuration::zero());
+ void setMaxSampleAge(const StatsDuration& duration);
+
+ /// @brief Determines how many samples of a given statistic should be kept.
+ ///
+ /// Specifies that statistic name should be stored not as a single value,
+ /// but rather as a set of values. In this form, at most max_samples will
+ /// be kept. When adding max_samples + 1 sample, the oldest sample will be
+ /// discarded.
+ ///
+ ///
+ /// @param max_samples how many samples of a given statistic should be kept
+ /// Example:
+ /// To set a statistic to keep the last 100 observations, call:
+ /// setMaxSampleCount(100);
+ void setMaxSampleCount(uint32_t max_samples);
+
+ /// @brief Determines default maximum age of samples.
+ ///
+ /// @param duration default maximum age of samples to keep.
+ static void setMaxSampleAgeDefault(const StatsDuration& duration);
+
+ /// @brief Determines default maximum count of samples.
+ ///
+ /// @param max_samples default maximum count of samples to keep.
+ /// (0 means to disable count limit and enable age limit)
+ static void setMaxSampleCountDefault(uint32_t max_samples);
+
+ /// @brief Get default maximum age of samples.
+ ///
+ /// @return default maximum age of samples to keep.
+ static const StatsDuration& getMaxSampleAgeDefault();
+
+ /// @brief Get default maximum count of samples.
+ ///
+ /// @return max_samples default maximum count of samples to keep.
+ /// (0 means that count limit was disabled)
+ static uint32_t getMaxSampleCountDefault();
+
+ /// @
+
+ /// @brief Records absolute integer observation
+ ///
+ /// @param value integer value observed
+ /// @throw InvalidStatType if statistic is not integer
+ void setValue(const int64_t value);
+
+ /// @brief Records absolute floating point observation
+ ///
+ /// @param value floating point value observed
+ /// @throw InvalidStatType if statistic is not fp
+ void setValue(const double value);
+
+ /// @brief Records absolute duration observation
+ ///
+ /// @param value duration value observed
+ /// @throw InvalidStatType if statistic is not time duration
+ void setValue(const StatsDuration& value);
+
+ /// @brief Records absolute string observation
+ ///
+ /// @param value string value observed
+ /// @throw InvalidStatType if statistic is not a string
+ void setValue(const std::string& value);
+
+ /// @brief Records incremental integer observation
+ ///
+ /// @param value integer value observed
+ /// @throw InvalidStatType if statistic is not integer
+ void addValue(const int64_t value);
+
+ /// @brief Records incremental floating point observation
+ ///
+ /// @param value floating point value observed
+ /// @throw InvalidStatType if statistic is not fp
+ void addValue(const double value);
+
+ /// @brief Records incremental duration observation
+ ///
+ /// @param value duration value observed
+ /// @throw InvalidStatType if statistic is not time duration
+ void addValue(const StatsDuration& value);
+
+ /// @brief Records incremental string observation.
+ ///
+ /// @param value string value observed
+ /// @throw InvalidStatType if statistic is not a string
+ void addValue(const std::string& value);
+
+ /// @brief Returns size of observed storage
+ ///
+ /// @return size of storage
+ size_t getSize() const;
+
+ /// @brief Returns both values of max_sample_age_ of statistic.
+ ///
+ /// @return max_sample_age_.
+ std::pair<bool, StatsDuration> getMaxSampleAge() const;
+
+ /// @brief Returns both values of max_sample_count_ of statistic.
+ ///
+ /// @return max_sample_count_.
+ std::pair<bool, uint32_t> getMaxSampleCount() const;
+
+ /// @brief Resets statistic.
+ ///
+ /// Sets statistic to a neutral (0, 0.0 or "") value and
+ /// clears the underlying storage.
+ void reset();
+
+ /// @brief Returns statistic type
+ /// @return statistic type
+ Type getType() const {
+ return (type_);
+ }
+
+ /// @brief Returns observed integer sample
+ /// @return observed sample (value + timestamp)
+ /// @throw InvalidStatType if statistic is not integer
+ IntegerSample getInteger() const;
+
+ /// @brief Returns observed float sample
+ /// @return observed sample (value + timestamp)
+ /// @throw InvalidStatType if statistic is not fp
+ FloatSample getFloat() const;
+
+ /// @brief Returns observed duration sample
+ /// @return observed sample (value + timestamp)
+ /// @throw InvalidStatType if statistic is not time duration
+ DurationSample getDuration() const;
+
+ /// @brief Returns observed string sample
+ /// @return observed sample (value + timestamp)
+ /// @throw InvalidStatType if statistic is not a string
+ StringSample getString() const;
+
+ /// @brief Returns observed integer samples
+ /// @return list of observed samples (value + timestamp)
+ /// @throw InvalidStatType if statistic is not integer
+ std::list<IntegerSample> getIntegers() const;
+
+ /// @brief Returns observed float samples
+ /// @return list of observed samples (value + timestamp)
+ /// @throw InvalidStatType if statistic is not fp
+ std::list<FloatSample> getFloats() const;
+
+ /// @brief Returns observed duration samples
+ /// @return list of observed samples (value + timestamp)
+ /// @throw InvalidStatType if statistic is not time duration
+ std::list<DurationSample> getDurations() const;
+
+ /// @brief Returns observed string samples
+ /// @return list of observed samples (value + timestamp)
+ /// @throw InvalidStatType if statistic is not a string
+ std::list<StringSample> getStrings() const;
+
+ /// @brief Returns as a JSON structure
+ /// @return JSON structures representing all observations
+ isc::data::ConstElementPtr getJSON() const;
+
+ /// @brief Converts statistic type to string
+ /// @return textual name of statistic type
+ static std::string typeToText(Type type);
+
+ /// @brief Returns observation name
+ std::string getName() const {
+ return (name_);
+ }
+
+private:
+
+ /// @brief Returns size of observed storage
+ ///
+ /// This method returns size of observed storage.
+ /// It is used by public methods to return size of
+ /// available storages.
+ /// @tparam Storage type of storage (e.g. list<IntegerSample>)
+ /// @param storage storage which size will be returned
+ /// @param exp_type expected observation type (used for sanity checking)
+ /// @return size of storage
+ template<typename StorageType>
+ size_t getSizeInternal(StorageType& storage, Type exp_type) const;
+
+ /// @brief Records absolute sample (internal version)
+ ///
+ /// This method records an absolute value of an observation.
+ /// It is used by public methods to add sample to one of
+ /// available storages.
+ ///
+ /// @tparam SampleType type of sample (e.g. IntegerSample)
+ /// @tparam StorageType type of storage (e.g. list<IntegerSample>)
+ /// @param value observation to be recorded
+ /// @param storage observation will be stored here
+ /// @param exp_type expected observation type (used for sanity checking)
+ /// @throw InvalidStatType if observation type mismatches
+ template<typename SampleType, typename StorageType>
+ void setValueInternal(SampleType value, StorageType& storage,
+ Type exp_type);
+
+ /// @brief Returns a sample (internal version)
+ ///
+ /// @tparam SampleType type of sample (e.g. IntegerSample)
+ /// @tparam StorageType type of storage (e.g. list<IntegerSample>)
+ /// @param observation storage
+ /// @param exp_type expected observation type (used for sanity checking)
+ /// @throw InvalidStatType if observation type mismatches
+ /// @return Observed sample
+ template<typename SampleType, typename Storage>
+ SampleType getValueInternal(Storage& storage, Type exp_type) const;
+
+ /// @brief Returns samples (internal version)
+ ///
+ /// @tparam SampleType type of samples (e.g. IntegerSample)
+ /// @tparam Storage type of storage (e.g. list<IntegerSample>)
+ /// @param observation storage
+ /// @param exp_type expected observation type (used for sanity checking)
+ /// @throw InvalidStatType if observation type mismatches
+ /// @return list of observed samples
+ template<typename SampleType, typename Storage>
+ std::list<SampleType> getValuesInternal(Storage& storage,
+ Type exp_type) const;
+
+ /// @brief Determines maximum age of samples.
+ ///
+ /// @tparam Storage type of storage (e.g. list<IntegerSample>)
+ /// @param storage storage on which limit will be set
+ /// @param duration determines maximum age of samples
+ /// @param exp_type expected observation type (used for sanity checking)
+ template<typename StorageType>
+ void setMaxSampleAgeInternal(StorageType& storage,
+ const StatsDuration& duration, Type exp_type);
+
+ /// @brief Determines how many samples of a given statistic should be kept.
+ ///
+ /// @tparam Storage type of storage (e.g. list<IntegerSample>)
+ /// @param storage storage on which limit will be set
+ /// @param max_samples determines maximum number of samples
+ /// @param exp_type expected observation type (used for sanity checking)
+ template<typename StorageType>
+ void setMaxSampleCountInternal(StorageType& storage,
+ uint32_t max_samples, Type exp_type);
+
+ /// @brief Observation (statistic) name
+ std::string name_;
+
+ /// @brief Observation (statistic) type)
+ Type type_;
+
+ /// @brief Maximum number of samples
+ /// The limit is represented as a pair
+ /// of bool value and uint32_t
+ /// Only one kind of limit can be active
+ /// The bool value informs which limit
+ /// is available
+ /// True means active limit, false means inactive limit
+ std::pair<bool, uint32_t> max_sample_count_;
+
+ /// @brief Default maximum number of samples
+ ///
+ /// By default the MaxSampleCount is set to 20
+ /// and MaxSampleAge is disabled
+ static std::pair<bool, uint32_t> default_max_sample_count_;
+
+ /// @brief Maximum timespan of samples
+ /// The limit is represented as a pair
+ /// of bool value and StatsDuration
+ /// Only one kind of limit can be active
+ /// The bool value informs which limit
+ /// is available
+ /// True means active limit, false means inactive limit
+ std::pair<bool, StatsDuration> max_sample_age_;
+
+ /// @brief Default maximum timespan of samples
+ ///
+ /// By default the MaxSampleCount is set to 20
+ /// and MaxSampleAge is disabled
+ static std::pair<bool, StatsDuration> default_max_sample_age_;
+
+ /// @defgroup samples_storage Storage for supported observations
+ ///
+ /// @brief The following containers serve as a storage for all supported
+ /// observation types.
+ ///
+ /// @{
+
+ /// @brief Storage for integer samples
+ std::list<IntegerSample> integer_samples_;
+
+ /// @brief Storage for floating point samples
+ std::list<FloatSample> float_samples_;
+
+ /// @brief Storage for time duration samples
+ std::list<DurationSample> duration_samples_;
+
+ /// @brief Storage for string samples
+ std::list<StringSample> string_samples_;
+ /// @}
+};
+
+/// @brief Observation pointer
+typedef boost::shared_ptr<Observation> ObservationPtr;
+
+}
+}
+
+#endif // OBSERVATION_H
diff --git a/src/lib/stats/stats.dox b/src/lib/stats/stats.dox
new file mode 100644
index 0000000..7d4d3b5
--- /dev/null
+++ b/src/lib/stats/stats.dox
@@ -0,0 +1,16 @@
+// Copyright (C) 2020 Internet Systems Consortium, Inc. ("ISC")
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+/**
+ @page libstats libkea-stats - Kea Statistics Library
+
+@section statsMTConsiderations Multi-Threading Consideration for Statistics
+
+The statistic manager (@c isc::stats::StatsMgr singleton) is Kea thread safe
+i.e. it is thread safe when the multi-threading mode is true (when the
+multi-threading mode is false Kea main thread processes packets).
+
+*/
diff --git a/src/lib/stats/stats_mgr.cc b/src/lib/stats/stats_mgr.cc
new file mode 100644
index 0000000..58b36ab
--- /dev/null
+++ b/src/lib/stats/stats_mgr.cc
@@ -0,0 +1,645 @@
+// Copyright (C) 2015-2020 Internet Systems Consortium, Inc. ("ISC")
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+#include <config.h>
+
+#include <exceptions/exceptions.h>
+#include <stats/stats_mgr.h>
+#include <cc/data.h>
+#include <cc/command_interpreter.h>
+#include <util/multi_threading_mgr.h>
+#include <boost/make_shared.hpp>
+#include <chrono>
+
+using namespace std;
+using namespace std::chrono;
+using namespace isc::data;
+using namespace isc::config;
+using namespace isc::util;
+
+namespace isc {
+namespace stats {
+
+StatsMgr&
+StatsMgr::instance() {
+ static StatsMgr stats_mgr;
+ return (stats_mgr);
+}
+
+StatsMgr::StatsMgr() :
+ global_(boost::make_shared<StatContext>()), mutex_(new mutex) {
+}
+
+void
+StatsMgr::setValue(const string& name, const int64_t value) {
+ if (MultiThreadingMgr::instance().getMode()) {
+ lock_guard<mutex> lock(*mutex_);
+ setValueInternal(name, value);
+ } else {
+ setValueInternal(name, value);
+ }
+}
+
+void
+StatsMgr::setValue(const string& name, const double value) {
+ if (MultiThreadingMgr::instance().getMode()) {
+ lock_guard<mutex> lock(*mutex_);
+ setValueInternal(name, value);
+ } else {
+ setValueInternal(name, value);
+ }
+}
+
+void
+StatsMgr::setValue(const string& name, const StatsDuration& value) {
+ if (MultiThreadingMgr::instance().getMode()) {
+ lock_guard<mutex> lock(*mutex_);
+ setValueInternal(name, value);
+ } else {
+ setValueInternal(name, value);
+ }
+}
+
+void
+StatsMgr::setValue(const string& name, const string& value) {
+ if (MultiThreadingMgr::instance().getMode()) {
+ lock_guard<mutex> lock(*mutex_);
+ setValueInternal(name, value);
+ } else {
+ setValueInternal(name, value);
+ }
+}
+
+void
+StatsMgr::addValue(const string& name, const int64_t value) {
+ if (MultiThreadingMgr::instance().getMode()) {
+ lock_guard<mutex> lock(*mutex_);
+ addValueInternal(name, value);
+ } else {
+ addValueInternal(name, value);
+ }
+}
+
+void
+StatsMgr::addValue(const string& name, const double value) {
+ if (MultiThreadingMgr::instance().getMode()) {
+ lock_guard<mutex> lock(*mutex_);
+ addValueInternal(name, value);
+ } else {
+ addValueInternal(name, value);
+ }
+}
+
+void
+StatsMgr::addValue(const string& name, const StatsDuration& value) {
+ if (MultiThreadingMgr::instance().getMode()) {
+ lock_guard<mutex> lock(*mutex_);
+ addValueInternal(name, value);
+ } else {
+ addValueInternal(name, value);
+ }
+}
+
+void
+StatsMgr::addValue(const string& name, const string& value) {
+ if (MultiThreadingMgr::instance().getMode()) {
+ lock_guard<mutex> lock(*mutex_);
+ addValueInternal(name, value);
+ } else {
+ addValueInternal(name, value);
+ }
+}
+
+ObservationPtr
+StatsMgr::getObservation(const string& name) const {
+ if (MultiThreadingMgr::instance().getMode()) {
+ lock_guard<mutex> lock(*mutex_);
+ return (getObservationInternal(name));
+ } else {
+ return (getObservationInternal(name));
+ }
+}
+
+ObservationPtr
+StatsMgr::getObservationInternal(const string& name) const {
+ /// @todo: Implement contexts.
+ // Currently we keep everything in a global context.
+ return (global_->get(name));
+}
+
+void
+StatsMgr::addObservation(const ObservationPtr& stat) {
+ if (MultiThreadingMgr::instance().getMode()) {
+ lock_guard<mutex> lock(*mutex_);
+ addObservationInternal(stat);
+ } else {
+ addObservationInternal(stat);
+ }
+}
+
+void
+StatsMgr::addObservationInternal(const ObservationPtr& stat) {
+ /// @todo: Implement contexts.
+ // Currently we keep everything in a global context.
+ global_->add(stat);
+}
+
+bool
+StatsMgr::deleteObservation(const string& name) {
+ if (MultiThreadingMgr::instance().getMode()) {
+ lock_guard<mutex> lock(*mutex_);
+ return (deleteObservationInternal(name));
+ } else {
+ return (deleteObservationInternal(name));
+ }
+}
+
+bool
+StatsMgr::deleteObservationInternal(const string& name) {
+ /// @todo: Implement contexts.
+ // Currently we keep everything in a global context.
+ return (global_->del(name));
+}
+
+bool
+StatsMgr::setMaxSampleAge(const string& name, const StatsDuration& duration) {
+ if (MultiThreadingMgr::instance().getMode()) {
+ lock_guard<mutex> lock(*mutex_);
+ return (setMaxSampleAgeInternal(name, duration));
+ } else {
+ return (setMaxSampleAgeInternal(name, duration));
+ }
+}
+
+bool
+StatsMgr::setMaxSampleAgeInternal(const string& name,
+ const StatsDuration& duration) {
+ ObservationPtr obs = getObservationInternal(name);
+ if (obs) {
+ obs->setMaxSampleAge(duration);
+ return (true);
+ }
+ return (false);
+}
+
+bool
+StatsMgr::setMaxSampleCount(const string& name, uint32_t max_samples) {
+ if (MultiThreadingMgr::instance().getMode()) {
+ lock_guard<mutex> lock(*mutex_);
+ return (setMaxSampleCountInternal(name, max_samples));
+ } else {
+ return (setMaxSampleCountInternal(name, max_samples));
+ }
+}
+
+bool
+StatsMgr::setMaxSampleCountInternal(const string& name,
+ uint32_t max_samples) {
+ ObservationPtr obs = getObservationInternal(name);
+ if (obs) {
+ obs->setMaxSampleCount(max_samples);
+ return (true);
+ }
+ return (false);
+}
+
+void
+StatsMgr::setMaxSampleAgeAll(const StatsDuration& duration) {
+ if (MultiThreadingMgr::instance().getMode()) {
+ lock_guard<mutex> lock(*mutex_);
+ setMaxSampleAgeAllInternal(duration);
+ } else {
+ setMaxSampleAgeAllInternal(duration);
+ }
+}
+
+void
+StatsMgr::setMaxSampleAgeAllInternal(const StatsDuration& duration) {
+ global_->setMaxSampleAgeAll(duration);
+}
+
+void
+StatsMgr::setMaxSampleCountAll(uint32_t max_samples) {
+ if (MultiThreadingMgr::instance().getMode()) {
+ lock_guard<mutex> lock(*mutex_);
+ setMaxSampleCountAllInternal(max_samples);
+ } else {
+ setMaxSampleCountAllInternal(max_samples);
+ }
+}
+
+void
+StatsMgr::setMaxSampleCountAllInternal(uint32_t max_samples) {
+ global_->setMaxSampleCountAll(max_samples);
+}
+
+void
+StatsMgr::setMaxSampleAgeDefault(const StatsDuration& duration) {
+ if (MultiThreadingMgr::instance().getMode()) {
+ lock_guard<mutex> lock(*mutex_);
+ setMaxSampleAgeDefaultInternal(duration);
+ } else {
+ setMaxSampleAgeDefaultInternal(duration);
+ }
+}
+
+void
+StatsMgr::setMaxSampleAgeDefaultInternal(const StatsDuration& duration) {
+ Observation::setMaxSampleAgeDefault(duration);
+}
+
+void
+StatsMgr::setMaxSampleCountDefault(uint32_t max_samples) {
+ if (MultiThreadingMgr::instance().getMode()) {
+ lock_guard<mutex> lock(*mutex_);
+ setMaxSampleCountDefaultInternal(max_samples);
+ } else {
+ setMaxSampleCountDefaultInternal(max_samples);
+ }
+}
+
+void
+StatsMgr::setMaxSampleCountDefaultInternal(uint32_t max_samples) {
+ Observation::setMaxSampleCountDefault(max_samples);
+}
+
+const StatsDuration&
+StatsMgr::getMaxSampleAgeDefault() const {
+ if (MultiThreadingMgr::instance().getMode()) {
+ lock_guard<mutex> lock(*mutex_);
+ return (getMaxSampleAgeDefaultInternal());
+ } else {
+ return (getMaxSampleAgeDefaultInternal());
+ }
+}
+
+const StatsDuration&
+StatsMgr::getMaxSampleAgeDefaultInternal() const {
+ return (Observation::getMaxSampleAgeDefault());
+}
+
+uint32_t
+StatsMgr::getMaxSampleCountDefault() const {
+ if (MultiThreadingMgr::instance().getMode()) {
+ lock_guard<mutex> lock(*mutex_);
+ return (getMaxSampleCountDefaultInternal());
+ } else {
+ return (getMaxSampleCountDefaultInternal());
+ }
+}
+
+uint32_t
+StatsMgr::getMaxSampleCountDefaultInternal() const {
+ return (Observation::getMaxSampleCountDefault());
+}
+
+bool
+StatsMgr::reset(const string& name) {
+ if (MultiThreadingMgr::instance().getMode()) {
+ lock_guard<mutex> lock(*mutex_);
+ return (resetInternal(name));
+ } else {
+ return (resetInternal(name));
+ }
+}
+
+bool
+StatsMgr::resetInternal(const string& name) {
+ ObservationPtr obs = getObservationInternal(name);
+ if (obs) {
+ obs->reset();
+ return (true);
+ }
+ return (false);
+}
+
+bool
+StatsMgr::del(const string& name) {
+ if (MultiThreadingMgr::instance().getMode()) {
+ lock_guard<mutex> lock(*mutex_);
+ return (delInternal(name));
+ } else {
+ return (delInternal(name));
+ }
+}
+
+bool
+StatsMgr::delInternal(const string& name) {
+ return (global_->del(name));
+}
+
+void
+StatsMgr::removeAll() {
+ if (MultiThreadingMgr::instance().getMode()) {
+ lock_guard<mutex> lock(*mutex_);
+ removeAllInternal();
+ } else {
+ removeAllInternal();
+ }
+}
+
+void
+StatsMgr::removeAllInternal() {
+ global_->clear();
+}
+
+ConstElementPtr
+StatsMgr::get(const string& name) const {
+ if (MultiThreadingMgr::instance().getMode()) {
+ lock_guard<mutex> lock(*mutex_);
+ return (getInternal(name));
+ } else {
+ return (getInternal(name));
+ }
+}
+
+ConstElementPtr
+StatsMgr::getInternal(const string& name) const {
+ ElementPtr map = Element::createMap(); // a map
+ ObservationPtr obs = getObservationInternal(name);
+ if (obs) {
+ map->set(name, obs->getJSON()); // that contains observations
+ }
+ return (map);
+}
+
+ConstElementPtr
+StatsMgr::getAll() const {
+ if (MultiThreadingMgr::instance().getMode()) {
+ lock_guard<mutex> lock(*mutex_);
+ return (getAllInternal());
+ } else {
+ return (getAllInternal());
+ }
+}
+
+ConstElementPtr
+StatsMgr::getAllInternal() const {
+ return (global_->getAll());
+}
+
+void
+StatsMgr::resetAll() {
+ if (MultiThreadingMgr::instance().getMode()) {
+ lock_guard<mutex> lock(*mutex_);
+ resetAllInternal();
+ } else {
+ resetAllInternal();
+ }
+}
+
+void
+StatsMgr::resetAllInternal() {
+ global_->resetAll();
+}
+
+size_t
+StatsMgr::getSize(const string& name) const {
+ if (MultiThreadingMgr::instance().getMode()) {
+ lock_guard<mutex> lock(*mutex_);
+ return (getSizeInternal(name));
+ } else {
+ return (getSizeInternal(name));
+ }
+}
+
+size_t
+StatsMgr::getSizeInternal(const string& name) const {
+ ObservationPtr obs = getObservationInternal(name);
+ if (obs) {
+ return (obs->getSize());
+ }
+ return (0);
+}
+
+size_t
+StatsMgr::count() const {
+ if (MultiThreadingMgr::instance().getMode()) {
+ lock_guard<mutex> lock(*mutex_);
+ return (countInternal());
+ } else {
+ return (countInternal());
+ }
+}
+
+size_t
+StatsMgr::countInternal() const {
+ return (global_->size());
+}
+
+ConstElementPtr
+StatsMgr::statisticSetMaxSampleAgeHandler(const string& /*name*/,
+ const ConstElementPtr& params) {
+ string name, error;
+ StatsDuration duration;
+ if (!StatsMgr::getStatName(params, name, error)) {
+ return (createAnswer(CONTROL_RESULT_ERROR, error));
+ }
+ if (!StatsMgr::getStatDuration(params, duration, error)) {
+ return (createAnswer(CONTROL_RESULT_ERROR, error));
+ }
+ if (StatsMgr::instance().setMaxSampleAge(name, duration)) {
+ return (createAnswer(CONTROL_RESULT_SUCCESS,
+ "Statistic '" + name + "' duration limit is set."));
+ } else {
+ return (createAnswer(CONTROL_RESULT_ERROR,
+ "No '" + name + "' statistic found"));
+ }
+}
+
+ConstElementPtr
+StatsMgr::statisticSetMaxSampleCountHandler(const string& /*name*/,
+ const ConstElementPtr& params) {
+ string name, error;
+ uint32_t max_samples;
+ if (!StatsMgr::getStatName(params, name, error)) {
+ return (createAnswer(CONTROL_RESULT_ERROR, error));
+ }
+ if (!StatsMgr::getStatMaxSamples(params, max_samples, error)) {
+ return (createAnswer(CONTROL_RESULT_ERROR, error));
+ }
+ if (StatsMgr::instance().setMaxSampleCount(name, max_samples)) {
+ return (createAnswer(CONTROL_RESULT_SUCCESS,
+ "Statistic '" + name + "' count limit is set."));
+ } else {
+ return (createAnswer(CONTROL_RESULT_ERROR,
+ "No '" + name + "' statistic found"));
+ }
+}
+
+ConstElementPtr
+StatsMgr::statisticGetHandler(const string& /*name*/,
+ const ConstElementPtr& params) {
+ string name, error;
+ if (!StatsMgr::getStatName(params, name, error)) {
+ return (createAnswer(CONTROL_RESULT_ERROR, error));
+ }
+ return (createAnswer(CONTROL_RESULT_SUCCESS,
+ StatsMgr::instance().get(name)));
+}
+
+ConstElementPtr
+StatsMgr::statisticResetHandler(const string& /*name*/,
+ const ConstElementPtr& params) {
+ string name, error;
+ if (!StatsMgr::getStatName(params, name, error)) {
+ return (createAnswer(CONTROL_RESULT_ERROR, error));
+ }
+ if (StatsMgr::instance().reset(name)) {
+ return (createAnswer(CONTROL_RESULT_SUCCESS,
+ "Statistic '" + name + "' reset."));
+ } else {
+ return (createAnswer(CONTROL_RESULT_ERROR,
+ "No '" + name + "' statistic found"));
+ }
+}
+
+ConstElementPtr
+StatsMgr::statisticRemoveHandler(const string& /*name*/,
+ const ConstElementPtr& params) {
+ string name, error;
+ if (!StatsMgr::getStatName(params, name, error)) {
+ return (createAnswer(CONTROL_RESULT_ERROR, error));
+ }
+ if (StatsMgr::instance().del(name)) {
+ return (createAnswer(CONTROL_RESULT_SUCCESS,
+ "Statistic '" + name + "' removed."));
+ } else {
+ return (createAnswer(CONTROL_RESULT_ERROR,
+ "No '" + name + "' statistic found"));
+ }
+
+}
+
+ConstElementPtr
+StatsMgr::statisticRemoveAllHandler(const string& /*name*/,
+ const ConstElementPtr& /*params*/) {
+ StatsMgr::instance().removeAll();
+ return (createAnswer(CONTROL_RESULT_SUCCESS,
+ "Warning: statistic-remove-all command is deprecated."
+ " All statistics removed."));
+}
+
+ConstElementPtr
+StatsMgr::statisticGetAllHandler(const string& /*name*/,
+ const ConstElementPtr& /*params*/) {
+ ConstElementPtr all_stats = StatsMgr::instance().getAll();
+ return (createAnswer(CONTROL_RESULT_SUCCESS, all_stats));
+}
+
+ConstElementPtr
+StatsMgr::statisticResetAllHandler(const string& /*name*/,
+ const ConstElementPtr& /*params*/) {
+ StatsMgr::instance().resetAll();
+ return (createAnswer(CONTROL_RESULT_SUCCESS,
+ "All statistics reset to neutral values."));
+}
+
+ConstElementPtr
+StatsMgr::statisticSetMaxSampleAgeAllHandler(const ConstElementPtr& params) {
+ string error;
+ StatsDuration duration;
+ if (!StatsMgr::getStatDuration(params, duration, error)) {
+ return (createAnswer(CONTROL_RESULT_ERROR, error));
+ }
+ if (MultiThreadingMgr::instance().getMode()) {
+ lock_guard<mutex> lock(*mutex_);
+ StatsMgr::instance().setMaxSampleCountDefaultInternal(0);
+ StatsMgr::instance().setMaxSampleAgeDefaultInternal(duration);
+ StatsMgr::instance().setMaxSampleAgeAllInternal(duration);
+ } else {
+ StatsMgr::instance().setMaxSampleCountDefaultInternal(0);
+ StatsMgr::instance().setMaxSampleAgeDefaultInternal(duration);
+ StatsMgr::instance().setMaxSampleAgeAllInternal(duration);
+ }
+ return (createAnswer(CONTROL_RESULT_SUCCESS,
+ "All statistics duration limit are set."));
+}
+
+ConstElementPtr
+StatsMgr::statisticSetMaxSampleCountAllHandler(const ConstElementPtr& params) {
+ string error;
+ uint32_t max_samples;
+ if (!StatsMgr::getStatMaxSamples(params, max_samples, error)) {
+ return (createAnswer(CONTROL_RESULT_ERROR, error));
+ }
+ if (max_samples == 0) {
+ error = "'max-samples' parameter must not be zero";
+ return (createAnswer(CONTROL_RESULT_ERROR, error));
+ }
+ if (MultiThreadingMgr::instance().getMode()) {
+ lock_guard<mutex> lock(*mutex_);
+ StatsMgr::instance().setMaxSampleCountDefaultInternal(max_samples);
+ StatsMgr::instance().setMaxSampleCountAllInternal(max_samples);
+ } else {
+ StatsMgr::instance().setMaxSampleCountDefaultInternal(max_samples);
+ StatsMgr::instance().setMaxSampleCountAllInternal(max_samples);
+ }
+ return (createAnswer(CONTROL_RESULT_SUCCESS,
+ "All statistics count limit are set."));
+}
+
+bool
+StatsMgr::getStatName(const ConstElementPtr& params,
+ string& name,
+ string& reason) {
+ if (!params) {
+ reason = "Missing mandatory 'name' parameter.";
+ return (false);
+ }
+ ConstElementPtr stat_name = params->get("name");
+ if (!stat_name) {
+ reason = "Missing mandatory 'name' parameter.";
+ return (false);
+ }
+ if (stat_name->getType() != Element::string) {
+ reason = "'name' parameter expected to be a string.";
+ return (false);
+ }
+ name = stat_name->stringValue();
+ return (true);
+}
+
+bool
+StatsMgr::getStatDuration(const ConstElementPtr& params,
+ StatsDuration& duration,
+ string& reason) {
+ if (!params) {
+ reason = "Missing mandatory 'duration' parameter.";
+ return (false);
+ }
+ ConstElementPtr stat_duration = params->get("duration");
+ if (!stat_duration) {
+ reason = "Missing mandatory 'duration' parameter.";
+ return (false);
+ }
+ duration = std::chrono::seconds(stat_duration->intValue());
+ return (true);
+}
+
+bool
+StatsMgr::getStatMaxSamples(const ConstElementPtr& params,
+ uint32_t& max_samples,
+ string& reason) {
+ if (!params) {
+ reason = "Missing mandatory 'max-samples' parameter.";
+ return (false);
+ }
+ ConstElementPtr stat_max_samples = params->get("max-samples");
+ if (!stat_max_samples) {
+ reason = "Missing mandatory 'max-samples' parameter.";
+ return (false);
+ }
+ if (stat_max_samples->getType() != Element::integer) {
+ reason = "'max-samples' parameter expected to be an integer.";
+ return (false);
+ }
+ max_samples = stat_max_samples->intValue();
+ return (true);
+}
+
+} // end of namespace stats
+} // end of namespace isc
diff --git a/src/lib/stats/stats_mgr.h b/src/lib/stats/stats_mgr.h
new file mode 100644
index 0000000..564df43
--- /dev/null
+++ b/src/lib/stats/stats_mgr.h
@@ -0,0 +1,789 @@
+// Copyright (C) 2015-2020 Internet Systems Consortium, Inc. ("ISC")
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+#ifndef STATSMGR_H
+#define STATSMGR_H
+
+#include <stats/observation.h>
+#include <stats/context.h>
+#include <boost/noncopyable.hpp>
+#include <boost/scoped_ptr.hpp>
+
+#include <map>
+#include <mutex>
+#include <string>
+#include <vector>
+#include <sstream>
+
+namespace isc {
+namespace stats {
+
+/// @brief Statistics Manager class
+///
+/// StatsMgr is a singleton class that represents a subsystem that manages
+/// collection, storage and reporting of various types of statistics.
+/// It is also the intended API for both core code and hooks.
+///
+/// As of May 2015, Tomek ran performance benchmarks (see unit-tests in
+/// stats_mgr_unittest.cc with performance in their names) and it seems
+/// the code is able to register ~2.5-3 million observations per second, even
+/// with 1000 different statistics recorded. That seems sufficient for now,
+/// so there is no immediate need to develop any multi-threading solutions
+/// for now. However, should this decision be revised in the future, the
+/// best place for it would to be modify @ref addObservation method here.
+/// It's the common code point that all new observations must pass through.
+/// One possible way to enable multi-threading would be to run a separate
+/// thread handling collection. The main thread would call @ref addValue and
+/// @ref setValue methods that would end up calling @ref addObservation.
+/// That method would pass the data to separate thread to be collected and
+/// would immediately return. Further processing would be mostly as it
+/// is today, except happening in a separate thread. One unsolved issue in
+/// this approach is how to extract data, but that will remain unsolvable
+/// until we get the control socket implementation.
+///
+/// Statistics Manager does not use logging by design. The reasons are:
+/// - performance impact (logging every observation would degrade performance
+/// significantly. While it's possible to log on sufficiently high debug
+/// level, such a log would be not that useful)
+/// - dependency (statistics are intended to be a lightweight library, adding
+/// dependency on libkea-log, which has its own dependencies, including
+/// external log4cplus, is against 'lightweight' design)
+/// - if logging of specific statistics is warranted, it is recommended to
+/// add log entries in the code that calls StatsMgr.
+/// - enabling logging in StatsMgr does not offer fine tuning. It would be
+/// either all or nothing. Adding logging entries only when necessary
+/// in the code that uses StatsMgr gives better granularity.
+///
+/// If this decision is revisited in the future, the most universal places
+/// for adding logging have been marked in @ref addValueInternal and
+/// @ref setValueInternal.
+class StatsMgr : public boost::noncopyable {
+public:
+
+ /// @brief Statistics Manager accessor method.
+ static StatsMgr& instance();
+
+ /// @defgroup producer_methods Methods are used by data producers.
+ ///
+ /// @brief The following methods are used by data producers:
+ ///
+ /// @{
+
+ /// @brief Records absolute integer observation.
+ ///
+ /// @param name name of the observation
+ /// @param value integer value observed
+ /// @throw InvalidStatType if statistic is not integer
+ void setValue(const std::string& name, const int64_t value);
+
+ /// @brief Records absolute floating point observation.
+ ///
+ /// @param name name of the observation
+ /// @param value floating point value observed
+ /// @throw InvalidStatType if statistic is not fp
+ void setValue(const std::string& name, const double value);
+
+ /// @brief Records absolute duration observation.
+ ///
+ /// @param name name of the observation
+ /// @param value duration value observed
+ /// @throw InvalidStatType if statistic is not time duration
+ void setValue(const std::string& name, const StatsDuration& value);
+
+ /// @brief Records absolute string observation.
+ ///
+ /// @param name name of the observation
+ /// @param value string value observed
+ /// @throw InvalidStatType if statistic is not a string
+ void setValue(const std::string& name, const std::string& value);
+
+ /// @brief Records incremental integer observation.
+ ///
+ /// @param name name of the observation
+ /// @param value integer value observed
+ /// @throw InvalidStatType if statistic is not integer
+ void addValue(const std::string& name, const int64_t value);
+
+ /// @brief Records incremental floating point observation.
+ ///
+ /// @param name name of the observation
+ /// @param value floating point value observed
+ /// @throw InvalidStatType if statistic is not fp
+ void addValue(const std::string& name, const double value);
+
+ /// @brief Records incremental duration observation.
+ ///
+ /// @param name name of the observation
+ /// @param value duration value observed
+ /// @throw InvalidStatType if statistic is not time duration
+ void addValue(const std::string& name, const StatsDuration& value);
+
+ /// @brief Records incremental string observation.
+ ///
+ /// @param name name of the observation
+ /// @param value string value observed
+ /// @throw InvalidStatType if statistic is not a string
+ void addValue(const std::string& name, const std::string& value);
+
+ /// @brief Determines maximum age of samples.
+ ///
+ /// Specifies that statistic name should be stored not as a single value,
+ /// but rather as a set of values. duration determines the timespan.
+ /// Samples older than duration will be discarded. This is time-constrained
+ /// approach. For sample count constrained approach, see @ref
+ /// setMaxSampleCount() below.
+ /// Example:
+ /// To set a statistic to keep observations for the last 5 minutes, call:
+ /// setMaxSampleAge("incoming-packets", StatsDuration::minutes(5));
+ /// to revert statistic to a single value, call:
+ /// setMaxSampleAge("incoming-packets", StatsDuration:zero());
+ ///
+ /// @param name name of the observation
+ /// @param duration determines maximum age of samples
+ /// @return true if successful, false if there's no such statistic
+ bool setMaxSampleAge(const std::string& name, const StatsDuration& duration);
+
+ /// @brief Determines how many samples of a given statistic should be kept.
+ ///
+ /// Specifies that statistic name should be stored not as single value, but
+ /// rather as a set of values. In this form, at most max_samples will be kept.
+ /// When adding max_samples + 1 sample, the oldest sample will be discarded.
+ /// Example:
+ /// To set a statistic to keep the last 100 observations, call:
+ /// setMaxSampleCount("incoming-packets", 100);
+ ///
+ /// @param name name of the observation
+ /// @param max_samples how many samples of a given statistic should be kept
+ /// @return true if successful, false if there's no such statistic
+ bool setMaxSampleCount(const std::string& name, uint32_t max_samples);
+
+ /// @brief Set duration limit for all collected statistics.
+ ///
+ /// @param duration determines maximum age of samples
+ void setMaxSampleAgeAll(const StatsDuration& duration);
+
+ /// @brief Set count limit for all collected statistics.
+ ///
+ /// @param max_samples how many samples of a given statistic should be kept
+ void setMaxSampleCountAll(uint32_t max_samples);
+
+ /// @brief Set default duration limit.
+ ///
+ /// @param duration default maximum age of samples to keep
+ void setMaxSampleAgeDefault(const StatsDuration& duration);
+
+ /// @brief Set default count limit.
+ ///
+ /// @param max_samples default maximum number of samples to keep
+ /// (0 means to disable count limit and enable age limit)
+ void setMaxSampleCountDefault(uint32_t max_samples);
+
+ /// @brief Get default duration limit.
+ ///
+ /// @return default maximum age of samples to keep.
+ const StatsDuration& getMaxSampleAgeDefault() const;
+
+ /// @brief Get default count limit.
+ ///
+ /// @return default maximum number of samples to keep.
+ /// (0 means that count limit was disabled)
+ uint32_t getMaxSampleCountDefault() const;
+
+ /// @}
+
+ /// @defgroup consumer_methods Methods are used by data consumers.
+ ///
+ /// @brief The following methods are used by data consumers:
+ ///
+ /// @{
+
+ /// @brief Resets specified statistic.
+ ///
+ /// This is a convenience function and is equivalent to setValue(name,
+ /// neutral_value), where neutral_value is 0, 0.0 or "".
+ ///
+ /// @param name name of the statistic to be reset.
+ /// @return true if successful, false if there's no such statistic
+ bool reset(const std::string& name);
+
+ /// @brief Removes specified statistic.
+ ///
+ /// @param name name of the statistic to be removed.
+ /// @return true if successful, false if there's no such statistic
+ bool del(const std::string& name);
+
+ /// @brief Resets all collected statistics back to zero.
+ void resetAll();
+
+ /// @brief Removes all collected statistics.
+ /// @note This command was deprecated.
+ void removeAll();
+
+ /// @brief Returns size of specified statistic.
+ ///
+ /// @param name name of the statistic which size should be return.
+ /// @return size of specified statistic, 0 means lack of given statistic.
+ size_t getSize(const std::string& name) const;
+
+ /// @brief Returns number of available statistics.
+ ///
+ /// @return number of recorded statistics.
+ size_t count() const;
+
+ /// @brief Returns a single statistic as a JSON structure.
+ ///
+ /// @return JSON structures representing a single statistic
+ isc::data::ConstElementPtr get(const std::string& name) const;
+
+ /// @brief Returns all statistics as a JSON structure.
+ ///
+ /// @return JSON structures representing all statistics
+ isc::data::ConstElementPtr getAll() const;
+
+ /// @}
+
+ /// @brief Returns an observation.
+ ///
+ /// Used in testing only. Production code should use @ref get() method
+ /// when the value is dereferenced.
+ /// Calls @ref getObservationInternal() method in a thread safe context.
+ ///
+ /// @param name name of the statistic
+ /// @return Pointer to the Observation object
+ ObservationPtr getObservation(const std::string& name) const;
+
+ /// @brief Returns an observation in a thread safe context.
+ ///
+ /// Used in testing only. Production code should use @ref get() method
+ /// when the value is dereferenced. Should be called in a thread safe context.
+ ///
+ /// @param name name of the statistic
+ /// @return Pointer to the Observation object
+ ObservationPtr getObservationInternal(const std::string& name) const;
+
+ /// @brief Generates statistic name in a given context
+ ///
+ /// Example:
+ /// @code
+ /// generateName("subnet", 123, "received-packets");
+ /// @endcode
+ /// will return subnet[123].received-packets. Any printable type
+ /// can be used as index.
+ ///
+ /// @tparam Type any type that can be used to index contexts
+ /// @param context name of the context (e.g. 'subnet')
+ /// @param index value used for indexing contexts (e.g. subnet_id)
+ /// @param stat_name name of the statistic
+ /// @return returns full statistic name in form context[index].stat_name
+ template<typename Type>
+ static std::string generateName(const std::string& context, Type index,
+ const std::string& stat_name) {
+ std::stringstream name;
+ name << context << "[" << index << "]." << stat_name;
+ return (name.str());
+ }
+
+ /// @defgroup command_methods Methods are used to handle commands.
+ ///
+ /// @brief The following methods are used to handle commands:
+ ///
+ /// @{
+
+ /// @brief Handles statistic-get command
+ ///
+ /// This method handles statistic-get command, which returns value
+ /// of a given statistic). It expects one parameter stored in params map:
+ /// name: name of the statistic
+ ///
+ /// Example params structure:
+ /// {
+ /// "name": "packets-received"
+ /// }
+ ///
+ /// @param name name of the command (ignored, should be "statistic-get")
+ /// @param params structure containing a map that contains "name"
+ /// @return answer containing details of specified statistic
+ static isc::data::ConstElementPtr
+ statisticGetHandler(const std::string& name,
+ const isc::data::ConstElementPtr& params);
+
+ /// @brief Handles statistic-reset command
+ ///
+ /// This method handles statistic-reset command, which resets value
+ /// of a given statistic. It expects one parameter stored in params map:
+ /// name: name of the statistic
+ ///
+ /// Example params structure:
+ /// {
+ /// "name": "packets-received"
+ /// }
+ ///
+ /// @param name name of the command (ignored, should be "statistic-reset")
+ /// @param params structure containing a map that contains "name"
+ /// @return answer containing confirmation
+ static isc::data::ConstElementPtr
+ statisticResetHandler(const std::string& name,
+ const isc::data::ConstElementPtr& params);
+
+ /// @brief Handles statistic-remove command
+ ///
+ /// This method handles statistic-reset command, which removes a given
+ /// statistic completely. It expects one parameter stored in params map:
+ /// name: name of the statistic
+ ///
+ /// Example params structure:
+ /// {
+ /// "name": "packets-received"
+ /// }
+ ///
+ /// @param name name of the command (ignored, should be "statistic-remove")
+ /// @param params structure containing a map that contains "name" element
+ /// @return answer containing confirmation
+ static isc::data::ConstElementPtr
+ statisticRemoveHandler(const std::string& name,
+ const isc::data::ConstElementPtr& params);
+
+ /// @brief Handles statistic-sample-age-set command
+ ///
+ /// This method handles statistic-sample-age-set command,
+ /// which sets max_sample_age_ limit of a given statistic
+ /// and leaves max_sample_count_ disabled.
+ /// It expects two parameters stored in params map:
+ /// name: name of the statistic
+ /// duration: time limit expressed as a number of seconds
+ ///
+ /// Example params structure:
+ /// {
+ /// "name": "packets-received",
+ /// "duration": 1245
+ /// }
+ ///
+ /// @param name name of the command (ignored, should be "statistic-sample-age-set")
+ /// @param params structure containing a map that contains "name" and "duration"
+ /// @return answer containing information about successfully setup limit of statistic
+ static isc::data::ConstElementPtr
+ statisticSetMaxSampleAgeHandler(const std::string& name,
+ const isc::data::ConstElementPtr& params);
+
+ /// @brief Handles statistic-sample-count-set command
+ ///
+ /// This method handles statistic-sample-count-set command,
+ /// which sets max_sample_count_ limit of a given statistic
+ /// and leaves max_sample_age_ disabled.
+ /// It expects two parameters stored in params map:
+ /// name: name of the statistic
+ /// max-samples: count limit
+ ///
+ /// Example params structure:
+ /// {
+ /// "name": "packets-received",
+ /// "max-samples": 15
+ /// }
+ ///
+ /// @param name name of the command (ignored, should be "statistic-sample-count-set")
+ /// @param params structure containing a map that contains "name" and "max-samples"
+ /// @return answer containing information about successfully setup limit of statistic
+ static isc::data::ConstElementPtr
+ statisticSetMaxSampleCountHandler(const std::string& name,
+ const isc::data::ConstElementPtr& params);
+
+ /// @brief Handles statistic-get-all command
+ ///
+ /// This method handles statistic-get-all command, which returns values
+ /// of all statistics. Params parameter is ignored.
+ ///
+ /// @param name name of the command (ignored, should be "statistic-get-all")
+ /// @param params ignored
+ /// @return answer containing values of all statistic
+ static isc::data::ConstElementPtr
+ statisticGetAllHandler(const std::string& name,
+ const isc::data::ConstElementPtr& params);
+
+ /// @brief Handles statistic-reset-all command
+ ///
+ /// This method handles statistic-reset-all command, which sets values of
+ /// all statistics back to zero. Params parameter is ignored.
+ ///
+ /// @param name name of the command (ignored, should be "statistic-reset-all")
+ /// @param params ignored
+ /// @return answer confirming success of this operation
+ static isc::data::ConstElementPtr
+ statisticResetAllHandler(const std::string& name,
+ const isc::data::ConstElementPtr& params);
+
+ /// @brief Handles statistic-remove-all command
+ ///
+ /// @note The statistic-remove-all command was deprecated.
+ ///
+ /// This method handles statistic-remove-all command, which removes all
+ /// statistics. Params parameter is ignored.
+ ///
+ /// @param name name of the command (ignored, should be "statistic-remove-all")
+ /// @param params ignored
+ /// @return answer confirming success of this operation
+ static isc::data::ConstElementPtr
+ statisticRemoveAllHandler(const std::string& name,
+ const isc::data::ConstElementPtr& params);
+
+ /// @brief Handles statistic-sample-age-set-all command
+ ///
+ /// This method handles statistic-sample-age-set-all command,
+ /// which sets max_sample_age_ limit to all statistics and the default.
+ /// It expects one parameter stored in params map:
+ /// duration: limit expressed as a number of seconds
+ ///
+ /// Example params structure:
+ /// {
+ /// "duration": 1245
+ /// }
+ ///
+ /// @param params structure containing a map that contains "duration"
+ /// @return answer confirming success of this operation
+ isc::data::ConstElementPtr
+ statisticSetMaxSampleAgeAllHandler(const isc::data::ConstElementPtr& params);
+
+ /// @brief Handles statistic-sample-count-set-all command
+ ///
+ /// This method handles statistic-sample-count-set-all command,
+ /// which sets max_sample_count_ limit of all statistics and the default.
+ /// It expects one parameter stored in params map:
+ /// max-samples: count limit
+ /// The value 0 is out of range.
+ ///
+ /// Example params structure:
+ /// {
+ /// "max-samples": 15
+ /// }
+ ///
+ /// @param params structure containing a map that contains "max-samples"
+ /// @return answer confirming success of this operation
+ isc::data::ConstElementPtr
+ statisticSetMaxSampleCountAllHandler(const isc::data::ConstElementPtr& params);
+
+ /// @}
+
+private:
+
+ /// @private
+
+ /// @brief Private constructor.
+ ///
+ /// StatsMgr is a singleton. It should be accessed using @ref instance
+ /// method.
+ StatsMgr();
+
+ /// @public
+
+ /// @brief Sets a given statistic to specified value (internal version).
+ ///
+ /// This template method sets statistic identified by name to a value
+ /// specified by value. This internal method is used by public @ref setValue
+ /// methods.
+ ///
+ /// @tparam DataType one of int64_t, double, StatsDuration or string
+ /// @param name name of the statistic
+ /// @param value specified statistic will be set to this value
+ /// @throw InvalidStatType is statistic exists and has a different type.
+ template<typename DataType>
+ void setValueInternal(const std::string& name, DataType value) {
+ // If we want to log each observation, here would be the best place for it.
+ ObservationPtr stat = getObservationInternal(name);
+ if (stat) {
+ stat->setValue(value);
+ } else {
+ stat.reset(new Observation(name, value));
+ addObservationInternal(stat);
+ }
+ }
+
+ /// @public
+
+ /// @brief Adds specified value to a given statistic (internal version).
+ ///
+ /// This template method adds specified value to a given statistic (identified
+ /// by name to a value). This internal method is used by public @ref setValue
+ /// methods.
+ ///
+ /// @tparam DataType one of int64_t, double, StatsDuration or string
+ /// @param name name of the statistic
+ /// @param value specified statistic will be set to this value
+ /// @throw InvalidStatType is statistic exists and has a different type.
+ template<typename DataType>
+ void addValueInternal(const std::string& name, DataType value) {
+ // If we want to log each observation, here would be the best place for it.
+ ObservationPtr existing = getObservationInternal(name);
+ if (!existing) {
+ // We tried to add to a non-existing statistic. We can recover from
+ // that. Simply add the new incremental value as a new statistic and
+ // we're done.
+ setValueInternal(name, value);
+ return;
+ } else {
+ // Let's hope it is of correct type. If not, the underlying
+ // addValue() method will throw.
+ existing->addValue(value);
+ }
+ }
+
+ /// @public
+
+ /// @brief Adds a new observation.
+ ///
+ /// That's an utility method used by public @ref setValue() and
+ /// @ref addValue() methods.
+ /// Calls @ref addObservationInternal() method in a thread safe context.
+ ///
+ /// @param stat observation
+ void addObservation(const ObservationPtr& stat);
+
+ /// @public
+
+ /// @brief Adds a new observation in a thread safe context.
+ ///
+ /// That's an utility method used by public @ref setValue() and
+ /// @ref addValue() methods.
+ /// Should be called in a thread safe context.
+ ///
+ /// @param stat observation
+ void addObservationInternal(const ObservationPtr& stat);
+
+ /// @private
+
+ /// @brief Tries to delete an observation.
+ ///
+ /// Calls @ref deleteObservationInternal() method in a thread safe context.
+ ///
+ /// @param name of the statistic to be deleted
+ /// @return true if deleted, false if not found
+ bool deleteObservation(const std::string& name);
+
+ /// @private
+
+ /// @brief Tries to delete an observation in a thread safe context.
+ ///
+ /// Should be called in a thread safe context.
+ ///
+ /// @param name of the statistic to be deleted
+ /// @return true if deleted, false if not found
+ bool deleteObservationInternal(const std::string& name);
+
+ /// @private
+
+ /// @brief Determines maximum age of samples.
+ ///
+ /// Should be called in a thread safe context.
+ ///
+ /// @param name name of the observation
+ /// @param duration determines maximum age of samples
+ /// @return true if successful, false if there's no such statistic
+ bool setMaxSampleAgeInternal(const std::string& name, const StatsDuration& duration);
+
+ /// @private
+
+ /// @brief Determines how many samples of a given statistic should be kept.
+ ///
+ /// Should be called in a thread safe context.
+ ///
+ /// @param name name of the observation
+ /// @param max_samples how many samples of a given statistic should be kept
+ /// @return true if successful, false if there's no such statistic
+ bool setMaxSampleCountInternal(const std::string& name, uint32_t max_samples);
+
+ /// @private
+
+ /// @brief Set duration limit for all collected statistics.
+ ///
+ /// Should be called in a thread safe context.
+ ///
+ /// @param duration determines maximum age of samples
+ void setMaxSampleAgeAllInternal(const StatsDuration& duration);
+
+ /// @private
+
+ /// @brief Set count limit for all collected statistics.
+ ///
+ /// Should be called in a thread safe context.
+ ///
+ /// @param max_samples how many samples of a given statistic should be kept
+ void setMaxSampleCountAllInternal(uint32_t max_samples);
+
+ /// @private
+
+ /// @brief Set default duration limit.
+ ///
+ /// Should be called in a thread safe context.
+ ///
+ /// @param duration default maximum age of samples to keep.
+ void setMaxSampleAgeDefaultInternal(const StatsDuration& duration);
+
+ /// @brief Set default count limit.
+ ///
+ /// Should be called in a thread safe context.
+ ///
+ /// @param max_samples default maximum number of samples to keep.
+ /// (0 means to disable count limit and enable age limit)
+ void setMaxSampleCountDefaultInternal(uint32_t max_samples);
+
+ /// @private
+
+ /// @brief Get default duration limit.
+ ///
+ /// Should be called in a thread safe context.
+ ///
+ /// @return default maximum age of samples to keep.
+ const StatsDuration& getMaxSampleAgeDefaultInternal() const;
+
+ /// @brief Get default count limit.
+ ///
+ /// Should be called in a thread safe context.
+ ///
+ /// @return default maximum number of samples to keep.
+ /// (0 means that count limit was disabled)
+ uint32_t getMaxSampleCountDefaultInternal() const;
+
+ /// @private
+
+ /// @brief Resets specified statistic.
+ ///
+ /// Should be called in a thread safe context.
+ ///
+ /// @param name name of the statistic to be reset.
+ /// @return true if successful, false if there's no such statistic
+ bool resetInternal(const std::string& name);
+
+ /// @private
+
+ /// @brief Removes specified statistic.
+ ///
+ /// Should be called in a thread safe context.
+ ///
+ /// @param name name of the statistic to be removed.
+ /// @return true if successful, false if there's no such statistic
+ bool delInternal(const std::string& name);
+
+ /// @private
+
+ /// @brief Resets all collected statistics back to zero.
+ ///
+ /// Should be called in a thread safe context.
+ void resetAllInternal();
+
+ /// @private
+
+ /// @brief Removes all collected statistics.
+ ///
+ /// Should be called in a thread safe context.
+ void removeAllInternal();
+
+ /// @private
+
+ /// @brief Returns size of specified statistic.
+ ///
+ /// Should be called in a thread safe context.
+ ///
+ /// @param name name of the statistic which size should be return.
+ /// @return size of specified statistic, 0 means lack of given statistic.
+ size_t getSizeInternal(const std::string& name) const;
+
+ /// @private
+
+ /// @brief Returns number of available statistics.
+ ///
+ /// Should be called in a thread safe context.
+ ///
+ /// @return number of recorded statistics.
+ size_t countInternal() const;
+
+ /// @private
+
+ /// @brief Returns a single statistic as a JSON structure.
+ ///
+ /// Should be called in a thread safe context.
+ ///
+ /// @return JSON structures representing a single statistic
+ isc::data::ConstElementPtr getInternal(const std::string& name) const;
+
+ /// @private
+
+ /// @brief Returns all statistics as a JSON structure.
+ ///
+ /// Should be called in a thread safe context.
+ ///
+ /// @return JSON structures representing all statistics
+ isc::data::ConstElementPtr getAllInternal() const;
+
+ /// @private
+
+ /// @brief Utility method that attempts to extract statistic name
+ ///
+ /// This method attempts to extract statistic name from the params
+ /// structure. It is expected to be a map that contains 'name' element,
+ /// that is of type string. If present as expected, statistic name
+ /// set and true is returned. If missing or is of incorrect type, the reason
+ /// is specified in reason parameter and false is returned.
+ ///
+ /// @param params parameters structure received in command
+ /// @param name [out] name of the statistic (if no error detected)
+ /// @param reason [out] failure reason (if error is detected)
+ /// @return true (if everything is ok), false otherwise
+ static bool getStatName(const isc::data::ConstElementPtr& params,
+ std::string& name,
+ std::string& reason);
+
+ /// @private
+
+ /// @brief Utility method that attempts to extract duration limit for
+ /// a given statistic
+ ///
+ /// This method attempts to extract duration limit for a given statistic
+ /// from the params structure.
+ /// It is expected to be a map that contains four 'duration' elements: 'hours',
+ /// 'minutes', 'seconds' and 'milliseconds'
+ /// all are of type int. If present as expected, statistic duration
+ /// limit is set and true is returned.
+ /// If any of these four parameters is missing or is of incorrect type,
+ /// the reason is specified in reason parameter and false is returned.
+ ///
+ /// @param params parameters structure received in command
+ /// @param duration [out] duration limit for the statistic (if no error detected)
+ /// @param reason [out] failure reason (if error is detected)
+ /// @return true (if everything is ok), false otherwise
+ static bool getStatDuration(const isc::data::ConstElementPtr& params,
+ StatsDuration& duration,
+ std::string& reason);
+
+ /// @private
+
+ /// @brief Utility method that attempts to extract count limit for
+ /// a given statistic
+ ///
+ /// This method attempts to extract count limit for a given statistic
+ /// from the params structure.
+ /// It is expected to be a map that contains 'max-samples' element,
+ /// that is of type int. If present as expected, statistic count
+ /// limit (max_samples) is set and true is returned.
+ /// If missing or is of incorrect type, the reason is specified in reason
+ /// parameter and false is returned.
+ ///
+ /// @param params parameters structure received in command
+ /// @param max_samples [out] count limit for the statistic (if no error detected)
+ /// @param reason [out] failure reason (if error is detected)
+ /// @return true (if everything is ok), false otherwise
+ static bool getStatMaxSamples(const isc::data::ConstElementPtr& params,
+ uint32_t& max_samples,
+ std::string& reason);
+
+ /// @brief This is a global context. All statistics will initially be stored here.
+ StatContextPtr global_;
+
+ /// @brief The mutex used to protect internal state.
+ const boost::scoped_ptr<std::mutex> mutex_;
+};
+
+} // namespace stats
+} // namespace isc
+
+#endif // STATS_MGR
diff --git a/src/lib/stats/tests/Makefile.am b/src/lib/stats/tests/Makefile.am
new file mode 100644
index 0000000..c8f53aa
--- /dev/null
+++ b/src/lib/stats/tests/Makefile.am
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+
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+
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+libstats_unittests_SOURCES += context_unittest.cc
+libstats_unittests_SOURCES += stats_mgr_unittest.cc
+
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+
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+libstats_unittests_LDADD += $(top_builddir)/src/lib/util/libkea-util.la
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+
+endif
+
+noinst_PROGRAMS = $(TESTS)
diff --git a/src/lib/stats/tests/Makefile.in b/src/lib/stats/tests/Makefile.in
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diff --git a/src/lib/stats/tests/context_unittest.cc b/src/lib/stats/tests/context_unittest.cc
new file mode 100644
index 0000000..92c754c
--- /dev/null
+++ b/src/lib/stats/tests/context_unittest.cc
@@ -0,0 +1,126 @@
+// Copyright (C) 2015-2020 Internet Systems Consortium, Inc. ("ISC")
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+#include <config.h>
+
+#include <stats/context.h>
+#include <gtest/gtest.h>
+#include <util/chrono_time_utils.h>
+#include <string>
+
+using namespace isc::data;
+using namespace isc::stats;
+using namespace std;
+using namespace std::chrono;
+
+// Basic test that checks get, add, del methods
+TEST(ContextTest, basic) {
+
+ // Let's create a couple observations. Using floating point,
+ // as they're easiest to initialize.
+ ObservationPtr a(new Observation("alpha", 1.11));
+ ObservationPtr b(new Observation("beta", 2.22));
+ ObservationPtr c(new Observation("gamma", 3.33));
+ string expected_a = a->getJSON()->str();
+ string expected_b = b->getJSON()->str();
+ string expected_c = c->getJSON()->str();
+
+
+ // Context where we will store the observations.
+ StatContext ctx;
+
+ // By default the context does not hold any statistics.
+ EXPECT_EQ(0, ctx.size());
+
+ // It should be possible to add 'a' statistic
+ EXPECT_NO_THROW(ctx.add(a));
+
+ // We can't add a duplicate.
+ EXPECT_THROW(ctx.add(a), DuplicateStat);
+
+ // It should be ok to add other statistics
+ EXPECT_NO_THROW(ctx.add(b));
+ EXPECT_NO_THROW(ctx.add(c));
+
+ // By now we should have 3 statistics recorded
+ EXPECT_EQ(3, ctx.size());
+
+ // Let's try to retrieve them
+ ObservationPtr from_ctx;
+ EXPECT_NO_THROW(from_ctx = ctx.get("alpha"));
+ ASSERT_TRUE(from_ctx);
+ EXPECT_EQ(expected_a, from_ctx->getJSON()->str());
+
+ EXPECT_NO_THROW(from_ctx = ctx.get("beta"));
+ ASSERT_TRUE(from_ctx);
+ EXPECT_EQ(expected_b, from_ctx->getJSON()->str());
+
+ EXPECT_NO_THROW(from_ctx = ctx.get("gamma"));
+ ASSERT_TRUE(from_ctx);
+ EXPECT_EQ(expected_c, from_ctx->getJSON()->str());
+
+ // Let's try to retrieve non-existing stat
+ EXPECT_NO_THROW(from_ctx = ctx.get("delta"));
+ EXPECT_FALSE(from_ctx);
+
+ // Now delete one of the stats...
+ EXPECT_TRUE(ctx.del("beta"));
+
+ // ... and check that it's really gone.
+ EXPECT_FALSE(ctx.get("beta"));
+
+ // Attempt to delete non-existing stat should fail.
+ EXPECT_FALSE(ctx.del("beta"));
+
+ ConstElementPtr result;
+ EXPECT_NO_THROW(result = ctx.getAll());
+
+ ASSERT_TRUE(result);
+ ElementPtr expected_result = Element::createMap();
+ expected_result->set("alpha", a->getJSON());
+ expected_result->set("gamma", c->getJSON());
+ EXPECT_EQ(result->str(), expected_result->str());
+
+ // Reset all statistics.
+ EXPECT_NO_THROW(ctx.resetAll());
+
+ EXPECT_NO_THROW(from_ctx = ctx.get("alpha"));
+ ASSERT_TRUE(from_ctx);
+ EXPECT_NE(expected_a, from_ctx->getJSON()->str());
+ EXPECT_EQ(0.0, a->getFloat().first);
+
+ EXPECT_NO_THROW(from_ctx = ctx.get("gamma"));
+ ASSERT_TRUE(from_ctx);
+ EXPECT_NE(expected_c, from_ctx->getJSON()->str());
+ EXPECT_EQ(0.0, c->getFloat().first);
+
+ // Set sample count for all statistics
+ EXPECT_NO_THROW(ctx.setMaxSampleCountAll(50));
+
+ EXPECT_NO_THROW(from_ctx = ctx.get("alpha"));
+ ASSERT_TRUE(from_ctx);
+ EXPECT_EQ(from_ctx->getMaxSampleCount().second, 50);
+
+ EXPECT_NO_THROW(from_ctx = ctx.get("gamma"));
+ ASSERT_TRUE(from_ctx);
+ EXPECT_EQ(from_ctx->getMaxSampleCount().second, 50);
+
+ // Set sample age for all statistics
+ const StatsDuration& dur(minutes(4) + seconds(5) + milliseconds(3));
+ EXPECT_NO_THROW(ctx.setMaxSampleAgeAll(dur));
+
+ EXPECT_NO_THROW(from_ctx = ctx.get("alpha"));
+ ASSERT_TRUE(from_ctx);
+ EXPECT_EQ(from_ctx->getMaxSampleAge().second, dur);
+
+ EXPECT_NO_THROW(from_ctx = ctx.get("gamma"));
+ ASSERT_TRUE(from_ctx);
+ EXPECT_EQ(from_ctx->getMaxSampleAge().second, dur);
+
+ // Clear all statistics.
+ EXPECT_NO_THROW(ctx.clear());
+ EXPECT_EQ(0, ctx.size());
+}
diff --git a/src/lib/stats/tests/observation_unittest.cc b/src/lib/stats/tests/observation_unittest.cc
new file mode 100644
index 0000000..ad10368
--- /dev/null
+++ b/src/lib/stats/tests/observation_unittest.cc
@@ -0,0 +1,619 @@
+// Copyright (C) 2015-2021 Internet Systems Consortium, Inc. ("ISC")
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+#include <config.h>
+
+#include <stats/observation.h>
+#include <exceptions/exceptions.h>
+#include <util/chrono_time_utils.h>
+#include <boost/shared_ptr.hpp>
+#include <gtest/gtest.h>
+
+#include <iostream>
+#include <sstream>
+
+#include <unistd.h>
+
+using namespace isc;
+using namespace isc::stats;
+using namespace std::chrono;
+
+namespace {
+
+static const StatsDuration& dur1234(hours(1) + minutes(2) + seconds(3) +
+ milliseconds(4));
+static const StatsDuration& dur5678(hours(5) + minutes(6) + seconds(7) +
+ milliseconds(8));
+static const StatsDuration& dur681012(hours(6) + minutes(8) + seconds(10) +
+ milliseconds(12));
+static const StatsDuration& dur453(minutes(4) + seconds(5) + milliseconds(3));
+
+// This test verifies that the number of seconds can be retrieved.
+TEST(StatsDurationTest, toSeconds) {
+ StatsDuration dur = StatsDuration::zero();
+ dur += hours(1) + minutes(1) + seconds(1) + milliseconds(1);
+ EXPECT_EQ(3661, toSeconds(dur));
+}
+
+/// @brief Test class for Observation
+///
+/// This simple fixture class initializes four observations:
+/// a (integer), b (float), c(time duration) and d (string).
+class ObservationTest : public ::testing::Test {
+public:
+
+ /// @brief Constructor
+ /// Initializes four observations.
+ ObservationTest() :
+ a("alpha", static_cast<int64_t>(1234)), // integer
+ b("beta", 12.34), // float
+ c("gamma", dur1234), // duration
+ d("delta", "1234") { // string
+ }
+
+ Observation a;
+ Observation b;
+ Observation c;
+ Observation d;
+};
+
+// Basic tests for the Observation constructors. This test checks whether
+// parameters passed to the constructor initialize the object properly.
+TEST_F(ObservationTest, constructor) {
+ EXPECT_EQ(Observation::STAT_INTEGER, a.getType());
+ EXPECT_EQ(Observation::STAT_FLOAT, b.getType());
+ EXPECT_EQ(Observation::STAT_DURATION, c.getType());
+ EXPECT_EQ(Observation::STAT_STRING, d.getType());
+
+ EXPECT_EQ(1234, a.getInteger().first);
+ EXPECT_EQ(12.34, b.getFloat().first);
+ EXPECT_EQ(dur1234, c.getDuration().first);
+ EXPECT_EQ("1234", d.getString().first);
+
+ // Let's check that attempting to get a different type
+ // than used will cause an exception.
+ EXPECT_THROW(a.getFloat(), InvalidStatType);
+ EXPECT_THROW(a.getDuration(), InvalidStatType);
+ EXPECT_THROW(a.getString(), InvalidStatType);
+
+ EXPECT_THROW(b.getInteger(), InvalidStatType);
+ EXPECT_THROW(b.getDuration(), InvalidStatType);
+ EXPECT_THROW(b.getString(), InvalidStatType);
+
+ EXPECT_THROW(c.getInteger(), InvalidStatType);
+ EXPECT_THROW(c.getFloat(), InvalidStatType);
+ EXPECT_THROW(c.getString(), InvalidStatType);
+
+ EXPECT_THROW(d.getInteger(), InvalidStatType);
+ EXPECT_THROW(d.getFloat(), InvalidStatType);
+ EXPECT_THROW(d.getDuration(), InvalidStatType);
+}
+
+// This test checks whether it is possible to set to an absolute value for all
+// given types.
+TEST_F(ObservationTest, setValue) {
+ EXPECT_NO_THROW(a.setValue(static_cast<int64_t>(5678)));
+ EXPECT_NO_THROW(b.setValue(56e+78));
+ EXPECT_NO_THROW(c.setValue(dur5678));
+ EXPECT_NO_THROW(d.setValue("fiveSixSevenEight"));
+
+
+ EXPECT_EQ(5678, a.getInteger().first);
+ EXPECT_EQ(56e+78, b.getFloat().first);
+ EXPECT_EQ(dur5678, c.getDuration().first);
+ EXPECT_EQ("fiveSixSevenEight", d.getString().first);
+
+ // Now check whether setting value to a different type does
+ // throw an exception
+ EXPECT_THROW(a.setValue(56e+78), InvalidStatType);
+ EXPECT_THROW(a.setValue(dur5678), InvalidStatType);
+ EXPECT_THROW(a.setValue("fiveSixSevenEight"), InvalidStatType);
+
+ EXPECT_THROW(b.setValue(static_cast<int64_t>(5678)), InvalidStatType);
+ EXPECT_THROW(b.setValue(dur5678), InvalidStatType);
+ EXPECT_THROW(b.setValue("fiveSixSevenEight"), InvalidStatType);
+
+ EXPECT_THROW(c.setValue(static_cast<int64_t>(5678)), InvalidStatType);
+ EXPECT_THROW(c.setValue(56e+78), InvalidStatType);
+ EXPECT_THROW(c.setValue("fiveSixSevenEight"), InvalidStatType);
+
+ EXPECT_THROW(d.setValue(static_cast<int64_t>(5678)), InvalidStatType);
+ EXPECT_THROW(d.setValue(56e+78), InvalidStatType);
+ EXPECT_THROW(d.setValue(dur5678), InvalidStatType);
+}
+
+// This test checks whether it is possible to add value to existing
+// counter.
+TEST_F(ObservationTest, addValue) {
+ // Note: all Observations were set to 1234, 12.34 or similar in
+ // ObservationTest constructor.
+
+ EXPECT_NO_THROW(a.addValue(static_cast<int64_t>(5678)));
+ EXPECT_NO_THROW(b.addValue(56.78));
+ EXPECT_NO_THROW(c.addValue(dur5678));
+ EXPECT_NO_THROW(d.addValue("fiveSixSevenEight"));
+
+ EXPECT_EQ(6912, a.getInteger().first);
+ EXPECT_EQ(69.12, b.getFloat().first);
+ EXPECT_EQ(dur681012, c.getDuration().first);
+ EXPECT_EQ("1234fiveSixSevenEight", d.getString().first);
+
+ ASSERT_EQ(a.getSize(), 2);
+ ASSERT_EQ(b.getSize(), 2);
+ ASSERT_EQ(c.getSize(), 2);
+ ASSERT_EQ(d.getSize(), 2);
+}
+
+// This test checks if collecting more than one sample
+// works well.
+TEST_F(ObservationTest, moreThanOne) {
+ // Arrays of 4 types of samples
+ int64_t int_samples[3] = {1234, 6912, 5678};
+ double float_samples[3] = {12.34, 69.12, 56e+78};
+ StatsDuration duration_samples[3] = {dur1234,
+ dur681012, dur5678};
+ std::string string_samples[3] = {"1234", "1234fiveSixSevenEight", "fiveSixSevenEight"};
+
+ EXPECT_NO_THROW(a.addValue(static_cast<int64_t>(5678)));
+ EXPECT_NO_THROW(b.addValue(56.78));
+ EXPECT_NO_THROW(c.addValue(dur5678));
+ EXPECT_NO_THROW(d.addValue("fiveSixSevenEight"));
+
+ EXPECT_NO_THROW(a.setValue(static_cast<int64_t>(5678)));
+ EXPECT_NO_THROW(b.setValue(56e+78));
+ EXPECT_NO_THROW(c.setValue(dur5678));
+ EXPECT_NO_THROW(d.setValue("fiveSixSevenEight"));
+
+ ASSERT_EQ(a.getSize(), 3);
+ ASSERT_EQ(b.getSize(), 3);
+ ASSERT_EQ(c.getSize(), 3);
+ ASSERT_EQ(d.getSize(), 3);
+
+ ASSERT_NO_THROW(a.getIntegers());
+ ASSERT_NO_THROW(b.getFloats());
+ ASSERT_NO_THROW(c.getDurations());
+ ASSERT_NO_THROW(d.getStrings());
+
+ std::list<IntegerSample> samples_int = a.getIntegers(); // List of all integer samples
+ std::list<FloatSample> samples_float = b.getFloats(); // List of all float samples
+ std::list<DurationSample> samples_dur = c.getDurations(); // List of all duration samples
+ std::list<StringSample> samples_str = d.getStrings(); // List of all string samples
+
+ uint32_t i = 2; // Index pointed to the end of array of samples
+
+ for (std::list<IntegerSample>::iterator it = samples_int.begin(); it != samples_int.end(); ++it) {
+ EXPECT_EQ(int_samples[i], static_cast<int64_t>((*it).first));
+ --i;
+ }
+ i = 2;
+ for (std::list<FloatSample>::iterator it = samples_float.begin(); it != samples_float.end(); ++it) {
+ EXPECT_EQ(float_samples[i], (*it).first);
+ --i;
+ }
+ i = 2;
+ for (std::list<DurationSample>::iterator it = samples_dur.begin(); it != samples_dur.end(); ++it) {
+ EXPECT_EQ(duration_samples[i], (*it).first);
+ --i;
+ }
+ i = 2;
+ for (std::list<StringSample>::iterator it = samples_str.begin(); it != samples_str.end(); ++it) {
+ EXPECT_EQ(string_samples[i], (*it).first);
+ --i;
+ }
+}
+
+// This test checks whether the size of storage
+// is equal to the true value
+TEST_F(ObservationTest, getSize) {
+ // Check if size of storages is equal to 1
+ ASSERT_EQ(a.getSize(), 1);
+ ASSERT_EQ(b.getSize(), 1);
+ ASSERT_EQ(c.getSize(), 1);
+ ASSERT_EQ(d.getSize(), 1);
+
+ a.addValue(static_cast<int64_t>(5678));
+ b.addValue(56.78);
+ c.addValue(dur5678);
+ d.addValue("fiveSixSevenEight");
+
+ EXPECT_NO_THROW(a.getSize());
+ EXPECT_NO_THROW(b.getSize());
+ EXPECT_NO_THROW(c.getSize());
+ EXPECT_NO_THROW(d.getSize());
+
+ // Check if size of storages is equal to 2
+ ASSERT_EQ(a.getSize(), 2);
+ ASSERT_EQ(b.getSize(), 2);
+ ASSERT_EQ(c.getSize(), 2);
+ ASSERT_EQ(d.getSize(), 2);
+
+ a.setValue(static_cast<int64_t>(5678));
+ b.setValue(56e+78);
+ c.setValue(dur5678);
+ d.setValue("fiveSixSevenEight");
+
+ EXPECT_NO_THROW(a.getSize());
+ EXPECT_NO_THROW(b.getSize());
+ EXPECT_NO_THROW(c.getSize());
+ EXPECT_NO_THROW(d.getSize());
+
+ // Check if size of storages is equal to 3
+ ASSERT_EQ(a.getSize(), 3);
+ ASSERT_EQ(b.getSize(), 3);
+ ASSERT_EQ(c.getSize(), 3);
+ ASSERT_EQ(d.getSize(), 3);
+}
+
+// Checks whether setting amount limits works properly
+TEST_F(ObservationTest, setCountLimit) {
+ // Preparing of 21 test's samples for each type of storage
+ int64_t int_samples[22] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13,
+ 14, 15, 16, 17, 18, 19, 20, 21};
+ double float_samples[22] = {0.0, 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0,
+ 9.0, 10.0, 11.0, 12.0, 13.0, 14.0, 15.0, 16.0, 17.0, 18.0, 19.0,
+ 20.0, 21.0};
+ std::string string_samples[22] = {"a", "b", "c", "d", "e", "f", "g", "h",
+ "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u",
+ "v"};
+ StatsDuration duration_samples[22];
+
+ for (uint32_t i = 0; i < 22; ++i) {
+ duration_samples[i] = milliseconds(i);
+ }
+
+ // By default the max_sample_count is set to 20 and max_sample_age
+ // is deactivated
+ // Adding 21 samples to each type of Observation
+ for (uint32_t i = 0; i < 21; ++i) {
+ a.setValue(int_samples[i]);
+ }
+ for (uint32_t i = 0; i < 21; ++i) {
+ b.setValue(float_samples[i]);
+ }
+ for (uint32_t i = 0; i < 21; ++i) {
+ c.setValue(duration_samples[i]);
+ }
+ for (uint32_t i = 0; i < 21; ++i) {
+ d.setValue(string_samples[i]);
+ }
+
+ // Getting all 4 types of samples after inserting 21 values
+ std::list<IntegerSample> samples_int = a.getIntegers();
+ std::list<FloatSample> samples_float = b.getFloats();
+ std::list<DurationSample> samples_duration = c.getDurations();
+ std::list<StringSample> samples_string = d.getStrings();
+
+ // Check if size of storages is equal to 20
+ ASSERT_EQ(a.getSize(), 20);
+ ASSERT_EQ(b.getSize(), 20);
+ ASSERT_EQ(c.getSize(), 20);
+ ASSERT_EQ(d.getSize(), 20);
+
+ // And whether stored values are correct
+ uint32_t i = 20; // index of the last element in array of test's samples
+ for (std::list<IntegerSample>::iterator it = samples_int.begin(); it != samples_int.end(); ++it) {
+ EXPECT_EQ((*it).first, int_samples[i]);
+ --i;
+ }
+ i = 20; // index of last element in array of test's samples
+ for (std::list<FloatSample>::iterator it = samples_float.begin(); it != samples_float.end(); ++it) {
+ EXPECT_EQ((*it).first, float_samples[i]);
+ --i;
+ }
+ i = 20; // index of last element in array of test's samples
+ for (std::list<DurationSample>::iterator it = samples_duration.begin(); it != samples_duration.end(); ++it) {
+ EXPECT_EQ((*it).first, duration_samples[i]);
+ --i;
+ }
+ i = 20; // index of last element in array of test's samples
+ for (std::list<StringSample>::iterator it = samples_string.begin(); it != samples_string.end(); ++it) {
+ EXPECT_EQ((*it).first, string_samples[i]);
+ --i;
+ }
+
+ // Change size of storage to smaller one
+ ASSERT_NO_THROW(a.setMaxSampleCount(10));
+ ASSERT_NO_THROW(b.setMaxSampleCount(10));
+ ASSERT_NO_THROW(c.setMaxSampleCount(10));
+ ASSERT_NO_THROW(d.setMaxSampleCount(10));
+
+ samples_int = a.getIntegers();
+ samples_float = b.getFloats();
+ samples_duration = c.getDurations();
+ samples_string = d.getStrings();
+
+ // Check if size of storages is equal to 10
+ ASSERT_EQ(a.getSize(), 10);
+ ASSERT_EQ(b.getSize(), 10);
+ ASSERT_EQ(c.getSize(), 10);
+ ASSERT_EQ(d.getSize(), 10);
+
+ // And whether storages contain only the 10 newest values
+ i = 20; // index of last element in array of test's samples
+ for (std::list<IntegerSample>::iterator it = samples_int.begin(); it != samples_int.end(); ++it) {
+ EXPECT_EQ((*it).first, int_samples[i]);
+ --i;
+ }
+ i = 20; // index of last element in array of test's samples
+ for (std::list<FloatSample>::iterator it = samples_float.begin(); it != samples_float.end(); ++it) {
+ EXPECT_EQ((*it).first, float_samples[i]);
+ --i;
+ }
+ i = 20; // index of last element in array of test's samples
+ for (std::list<DurationSample>::iterator it = samples_duration.begin(); it != samples_duration.end(); ++it) {
+ EXPECT_EQ((*it).first, duration_samples[i]);
+ --i;
+ }
+ i = 20; // index of last element in array of test's samples
+ for (std::list<StringSample>::iterator it = samples_string.begin(); it != samples_string.end(); ++it) {
+ EXPECT_EQ((*it).first, string_samples[i]);
+ --i;
+ }
+
+ // Resize max_sample_count to greater
+ ASSERT_NO_THROW(a.setMaxSampleCount(50));
+ ASSERT_NO_THROW(b.setMaxSampleCount(50));
+ ASSERT_NO_THROW(c.setMaxSampleCount(50));
+ ASSERT_NO_THROW(d.setMaxSampleCount(50));
+
+ // Check if size of storages did not change without adding new value
+ ASSERT_EQ(a.getSize(), 10);
+ ASSERT_EQ(b.getSize(), 10);
+ ASSERT_EQ(c.getSize(), 10);
+ ASSERT_EQ(d.getSize(), 10);
+
+ // Add new values to each type of Observation
+ a.setValue(static_cast<int64_t>(21));
+ b.setValue(21.0);
+ c.setValue(milliseconds(21));
+ d.setValue("v");
+
+ samples_int = a.getIntegers();
+ samples_float = b.getFloats();
+ samples_duration = c.getDurations();
+ samples_string = d.getStrings();
+
+ ASSERT_EQ(a.getSize(), 11);
+ ASSERT_EQ(b.getSize(), 11);
+ ASSERT_EQ(c.getSize(), 11);
+ ASSERT_EQ(d.getSize(), 11);
+
+ i = 21; // index of last element in array of test's samples
+ for (std::list<IntegerSample>::iterator it = samples_int.begin(); it != samples_int.end(); ++it) {
+ EXPECT_EQ((*it).first, int_samples[i]);
+ --i;
+ }
+ i = 21; // index of last element in array of test's samples
+ for (std::list<FloatSample>::iterator it = samples_float.begin(); it != samples_float.end(); ++it) {
+ EXPECT_EQ((*it).first, float_samples[i]);
+ --i;
+ }
+ i = 21; // index of last element in array of test's samples
+ for (std::list<DurationSample>::iterator it = samples_duration.begin(); it != samples_duration.end(); ++it) {
+ EXPECT_EQ((*it).first, duration_samples[i]);
+ --i;
+ }
+ i = 21; // index of last element in array of test's samples
+ for (std::list<StringSample>::iterator it = samples_string.begin(); it != samples_string.end(); ++it) {
+ EXPECT_EQ((*it).first, string_samples[i]);
+ --i;
+ }
+
+}
+
+// Checks whether setting age limits works properly
+TEST_F(ObservationTest, setAgeLimit) {
+ // Set max_sample_age to 1 second
+ ASSERT_NO_THROW(c.setMaxSampleAge(seconds(1)));
+ // Add some value
+ c.setValue(milliseconds(5));
+ // Wait 1 second
+ sleep(1);
+ // and add new value
+ c.setValue(milliseconds(3));
+
+ // get the list of all samples
+ std::list<DurationSample> samples_duration = c.getDurations();
+ // check whether the size of samples is equal to 1
+ ASSERT_EQ(c.getSize(), 1);
+ // and whether it contains an expected value
+ EXPECT_EQ((*samples_duration.begin()).first, milliseconds(3));
+
+ // Wait 1 second to ensure removing previously set value
+ sleep(1);
+ // add 10 new values
+ for (uint32_t i = 0; i < 10; ++i) {
+ c.setValue(milliseconds(i));
+ }
+ // change the max_sample_age to smaller
+ ASSERT_NO_THROW(c.setMaxSampleAge(milliseconds(300)));
+
+ samples_duration = c.getDurations();
+ // check whether the size of samples is equal to 10
+ ASSERT_EQ(c.getSize(), 10);
+
+ // and whether it contains expected values
+ uint32_t i = 9;
+ for (std::list<DurationSample>::iterator it = samples_duration.begin(); it != samples_duration.end(); ++it) {
+ EXPECT_EQ((*it).first, milliseconds(i));
+ --i;
+ }
+}
+
+// Test checks whether we can get max_sample_age_ and max_sample_count_
+// properly.
+TEST_F(ObservationTest, getLimits) {
+ // First checks whether getting default values works properly
+ EXPECT_EQ(a.getMaxSampleAge().first, false);
+ EXPECT_EQ(b.getMaxSampleAge().first, false);
+ EXPECT_EQ(c.getMaxSampleAge().first, false);
+ EXPECT_EQ(d.getMaxSampleAge().first, false);
+
+ EXPECT_EQ(a.getMaxSampleCount().first, true);
+ EXPECT_EQ(b.getMaxSampleCount().first, true);
+ EXPECT_EQ(c.getMaxSampleCount().first, true);
+ EXPECT_EQ(d.getMaxSampleCount().first, true);
+
+ EXPECT_EQ(a.getMaxSampleCount().second, 20);
+ EXPECT_EQ(b.getMaxSampleCount().second, 20);
+ EXPECT_EQ(c.getMaxSampleCount().second, 20);
+ EXPECT_EQ(d.getMaxSampleCount().second, 20);
+
+ // change limit to time duration
+ ASSERT_NO_THROW(a.setMaxSampleAge(dur453));
+ ASSERT_NO_THROW(b.setMaxSampleAge(dur453));
+ ASSERT_NO_THROW(c.setMaxSampleAge(dur453));
+ ASSERT_NO_THROW(d.setMaxSampleAge(dur453));
+
+ EXPECT_EQ(a.getMaxSampleAge().first, true);
+ EXPECT_EQ(b.getMaxSampleAge().first, true);
+ EXPECT_EQ(c.getMaxSampleAge().first, true);
+ EXPECT_EQ(d.getMaxSampleAge().first, true);
+
+ EXPECT_EQ(a.getMaxSampleAge().second, dur453);
+ EXPECT_EQ(b.getMaxSampleAge().second, dur453);
+ EXPECT_EQ(c.getMaxSampleAge().second, dur453);
+ EXPECT_EQ(d.getMaxSampleAge().second, dur453);
+
+ EXPECT_EQ(a.getMaxSampleCount().first, false);
+ EXPECT_EQ(b.getMaxSampleCount().first, false);
+ EXPECT_EQ(c.getMaxSampleCount().first, false);
+ EXPECT_EQ(d.getMaxSampleCount().first, false);
+
+ EXPECT_EQ(a.getMaxSampleCount().second, 20);
+ EXPECT_EQ(b.getMaxSampleCount().second, 20);
+ EXPECT_EQ(c.getMaxSampleCount().second, 20);
+ EXPECT_EQ(d.getMaxSampleCount().second, 20);
+}
+
+// limit defaults are tested with StatsMgr.
+
+// Test checks whether timing is reported properly.
+TEST_F(ObservationTest, timers) {
+ auto before = SampleClock::now();
+ b.setValue(123.0); // Set it to a random value and record the time.
+
+ // Allow a bit of imprecision. This test allows 500ms. That should be ok,
+ // when running on virtual machines.
+ auto after = before + milliseconds(500);
+
+ // Now wait some time. We want to confirm that the timestamp recorded is the
+ // time the observation took place, not current time.
+ sleep(1);
+
+ FloatSample sample = b.getFloat();
+
+ // Let's check that the timestamp is within (before, after) range:
+ // before < sample-time < after
+ EXPECT_TRUE(before <= sample.second);
+ EXPECT_TRUE(sample.second <= after);
+}
+
+// Checks whether an integer statistic can generate proper JSON structures.
+// See https://gitlab.isc.org/isc-projects/kea/wikis/designs/Stats-design
+/// for details.
+TEST_F(ObservationTest, integerToJSON) {
+ // String which contains first added sample
+ std::string first_sample = ", [ 1234, \"" +
+ isc::util::clockToText(a.getInteger().second) + "\" ] ]";
+
+ a.setValue(static_cast<int64_t>(1234));
+
+ std::string exp = "[ [ 1234, \"" +
+ isc::util::clockToText(a.getInteger().second) + "\" ]" + first_sample;
+
+ std::cout << a.getJSON()->str() << std::endl;
+ EXPECT_EQ(exp, a.getJSON()->str());
+}
+
+// Checks whether a floating point statistic can generate proper JSON
+// structures. See
+/// https://gitlab.isc.org/isc-projects/kea/wikis/designs/Stats-design
+/// for details.
+TEST_F(ObservationTest, floatToJSON) {
+ // String which contains first added sample
+ std::string first_sample = ", [ 12.34, \"" +
+ isc::util::clockToText(b.getFloat().second) + "\" ] ]";
+
+ // Let's use a value that converts easily to floating point.
+ // No need to deal with infinite fractions in binary systems.
+
+ b.setValue(1234.5);
+
+ std::string exp = "[ [ 1234.5, \"" +
+ isc::util::clockToText(b.getFloat().second) + "\" ]" + first_sample;
+
+ std::cout << b.getJSON()->str() << std::endl;
+ EXPECT_EQ(exp, b.getJSON()->str());
+}
+
+// Checks whether a time duration statistic can generate proper JSON structures.
+// See https://gitlab.isc.org/isc-projects/kea/wikis/designs/Stats-design for
+// details.
+TEST_F(ObservationTest, durationToJSON) {
+ // String which contains first added sample
+ std::string first_sample = ", [ \"01:02:03.004000\", \"" +
+ isc::util::clockToText(c.getDuration().second) + "\" ] ]";
+
+ // 1 hour 2 minutes 3 seconds and 4 milliseconds
+ c.setValue(dur1234);
+
+ std::string exp = "[ [ \"01:02:03.004000\", \"" +
+ isc::util::clockToText(c.getDuration().second) + "\" ]" + first_sample;
+
+ std::cout << c.getJSON()->str() << std::endl;
+ EXPECT_EQ(exp, c.getJSON()->str());
+}
+
+// Checks whether a string statistic can generate proper JSON structures.
+// See https://gitlab.isc.org/isc-projects/kea/wikis/designs/Stats-design
+// for details.
+TEST_F(ObservationTest, stringToJSON) {
+ // String which contains first added sample
+ std::string first_sample = ", [ \"1234\", \"" +
+ isc::util::clockToText(d.getString().second) + "\" ] ]";
+
+ d.setValue("Lorem ipsum dolor sit amet");
+
+ std::string exp = "[ [ \"Lorem ipsum dolor sit amet\", \"" +
+ isc::util::clockToText(d.getString().second) + "\" ]" + first_sample;
+
+ std::cout << d.getJSON()->str() << std::endl;
+ EXPECT_EQ(exp, d.getJSON()->str());
+}
+
+// Checks whether reset() resets the statistics properly.
+TEST_F(ObservationTest, reset) {
+ EXPECT_NO_THROW(a.addValue(static_cast<int64_t>(5678)));
+ EXPECT_NO_THROW(b.addValue(56.78));
+ EXPECT_NO_THROW(c.addValue(dur5678));
+ EXPECT_NO_THROW(d.addValue("fiveSixSevenEight"));
+
+ a.reset(); // integer
+ b.reset(); // float
+ c.reset(); // duration
+ d.reset(); // string
+
+ EXPECT_EQ(0, a.getInteger().first);
+ EXPECT_EQ(0.0, b.getFloat().first);
+ EXPECT_EQ(StatsDuration::zero(), c.getDuration().first);
+ EXPECT_EQ("", d.getString().first);
+
+ ASSERT_EQ(a.getSize(), 1);
+ ASSERT_EQ(b.getSize(), 1);
+ ASSERT_EQ(c.getSize(), 1);
+ ASSERT_EQ(d.getSize(), 1);
+}
+
+// Checks whether an observation can keep its name.
+TEST_F(ObservationTest, names) {
+ EXPECT_EQ("alpha", a.getName());
+ EXPECT_EQ("beta", b.getName());
+ EXPECT_EQ("gamma", c.getName());
+ EXPECT_EQ("delta", d.getName());
+}
+
+}
diff --git a/src/lib/stats/tests/run_unittests.cc b/src/lib/stats/tests/run_unittests.cc
new file mode 100644
index 0000000..9d621ae
--- /dev/null
+++ b/src/lib/stats/tests/run_unittests.cc
@@ -0,0 +1,18 @@
+// Copyright (C) 2015 Internet Systems Consortium, Inc. ("ISC")
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+#include <config.h>
+
+#include <gtest/gtest.h>
+
+int
+main(int argc, char* argv[]) {
+ ::testing::InitGoogleTest(&argc, argv);
+
+ int result = RUN_ALL_TESTS();
+
+ return (result);
+}
diff --git a/src/lib/stats/tests/stats_mgr_unittest.cc b/src/lib/stats/tests/stats_mgr_unittest.cc
new file mode 100644
index 0000000..734d134
--- /dev/null
+++ b/src/lib/stats/tests/stats_mgr_unittest.cc
@@ -0,0 +1,1117 @@
+// Copyright (C) 2015-2020 Internet Systems Consortium, Inc. ("ISC")
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+#include <config.h>
+
+#include <stats/stats_mgr.h>
+#include <exceptions/exceptions.h>
+#include <cc/data.h>
+#include <cc/command_interpreter.h>
+#include <util/chrono_time_utils.h>
+#include <boost/shared_ptr.hpp>
+#include <gtest/gtest.h>
+
+#include <iostream>
+#include <sstream>
+
+using namespace isc;
+using namespace isc::data;
+using namespace isc::stats;
+using namespace isc::config;
+using namespace std::chrono;
+
+namespace {
+
+static const StatsDuration& dur1234(hours(1) + minutes(2) + seconds(3) +
+ milliseconds(4));
+static const StatsDuration& dur5678(hours(5) + minutes(6) + seconds(7) +
+ milliseconds(8));
+static const StatsDuration& dur1245(hours(1) + minutes(2) + seconds(45));
+
+/// @brief Fixture class for StatsMgr testing
+///
+/// Very simple class that makes sure that StatsMgr is indeed instantiated
+/// before the test and any statistics are wiped out after it.
+class StatsMgrTest : public ::testing::Test {
+public:
+ /// @brief Constructor
+ /// Makes sure that the Statistics Manager is instantiated.
+ StatsMgrTest() {
+ StatsMgr::instance();
+ StatsMgr::instance().removeAll();
+ }
+
+ /// @brief Destructor
+ /// Removes all statistics and restores class defaults.
+ ~StatsMgrTest() {
+ StatsMgr::instance().removeAll();
+ StatsMgr::instance().setMaxSampleAgeDefault(StatsDuration::zero());
+ StatsMgr::instance().setMaxSampleCountDefault(20);
+ }
+};
+
+// Basic test for statistics manager interface.
+TEST_F(StatsMgrTest, basic) {
+ // Getting an instance
+ EXPECT_NO_THROW(StatsMgr::instance());
+
+ // Check that there are no statistics recorded by default.
+ EXPECT_EQ(0, StatsMgr::instance().count());
+}
+
+// Test checks whether it's possible to record and later report
+// an integer statistic.
+TEST_F(StatsMgrTest, integerStat) {
+ EXPECT_NO_THROW(StatsMgr::instance().setValue("alpha",
+ static_cast<int64_t>(1234)));
+
+ ObservationPtr alpha;
+ EXPECT_NO_THROW(alpha = StatsMgr::instance().getObservation("alpha"));
+ ASSERT_TRUE(alpha);
+
+ std::string exp = "{ \"alpha\": [ [ 1234, \"" +
+ isc::util::clockToText(alpha->getInteger().second) + "\" ] ] }";
+
+ EXPECT_EQ(exp, StatsMgr::instance().get("alpha")->str());
+}
+
+// Test checks whether it's possible to record and later report
+// a floating point statistic.
+TEST_F(StatsMgrTest, floatStat) {
+ EXPECT_NO_THROW(StatsMgr::instance().setValue("beta", 12.34));
+
+ ObservationPtr beta;
+ EXPECT_NO_THROW(beta = StatsMgr::instance().getObservation("beta"));
+ ASSERT_TRUE(beta);
+
+ std::string exp = "{ \"beta\": [ [ 12.34, \"" +
+ isc::util::clockToText(beta->getFloat().second) + "\" ] ] }";
+
+ EXPECT_EQ(exp, StatsMgr::instance().get("beta")->str());
+}
+
+// Test checks whether it's possible to record and later report
+// a duration statistic.
+TEST_F(StatsMgrTest, durationStat) {
+ EXPECT_NO_THROW(StatsMgr::instance().setValue("gamma", dur1234));
+
+ ObservationPtr gamma;
+ EXPECT_NO_THROW(gamma = StatsMgr::instance().getObservation("gamma"));
+ ASSERT_TRUE(gamma);
+
+ std::string exp = "{ \"gamma\": [ [ \"01:02:03.004000\", \"" +
+ isc::util::clockToText(gamma->getDuration().second) + "\" ] ] }";
+
+ EXPECT_EQ(exp, StatsMgr::instance().get("gamma")->str());
+}
+
+// Test checks whether it's possible to record and later report
+// a string statistic.
+TEST_F(StatsMgrTest, stringStat) {
+ EXPECT_NO_THROW(StatsMgr::instance().setValue("delta",
+ "Lorem ipsum"));
+
+ ObservationPtr delta;
+ EXPECT_NO_THROW(delta = StatsMgr::instance().getObservation("delta"));
+ ASSERT_TRUE(delta);
+
+ std::string exp = "{ \"delta\": [ [ \"Lorem ipsum\", \"" +
+ isc::util::clockToText(delta->getString().second) + "\" ] ] }";
+
+ EXPECT_EQ(exp, StatsMgr::instance().get("delta")->str());
+}
+
+// Basic test of getSize function.
+TEST_F(StatsMgrTest, getSize) {
+ StatsMgr::instance().setValue("alpha", static_cast<int64_t>(1234));
+ StatsMgr::instance().setValue("beta", 12.34);
+ StatsMgr::instance().setValue("gamma", dur1234);
+ StatsMgr::instance().setValue("delta", "Lorem ipsum");
+
+ EXPECT_NO_THROW(StatsMgr::instance().getSize("alpha"));
+ EXPECT_NO_THROW(StatsMgr::instance().getSize("beta"));
+ EXPECT_NO_THROW(StatsMgr::instance().getSize("gamma"));
+ EXPECT_NO_THROW(StatsMgr::instance().getSize("delta"));
+
+ EXPECT_EQ(StatsMgr::instance().getSize("alpha"), 1);
+ EXPECT_EQ(StatsMgr::instance().getSize("beta"), 1);
+ EXPECT_EQ(StatsMgr::instance().getSize("gamma"), 1);
+ EXPECT_EQ(StatsMgr::instance().getSize("delta"), 1);
+}
+
+// Test checks whether setting age limit and count limit works properly.
+TEST_F(StatsMgrTest, setLimits) {
+ // Initializing of an integer type observation
+ StatsMgr::instance().setValue("foo", static_cast<int64_t>(1));
+
+ EXPECT_NO_THROW(StatsMgr::instance().setMaxSampleAge("foo",
+ seconds(1)));
+
+ for (uint32_t i = 0; i < 10; ++i) {
+ if (i == 5) {
+ sleep(1); // wait one second to force exceeding the time limit
+ }
+ StatsMgr::instance().setValue("foo", static_cast<int64_t>(i));
+ }
+
+ EXPECT_EQ(StatsMgr::instance().getSize("foo"), 5);
+ EXPECT_NO_THROW(StatsMgr::instance().setMaxSampleCount("foo", 100));
+
+ for (int64_t i = 0; i < 200; ++i) {
+ StatsMgr::instance().setValue("foo", i);
+ }
+
+ EXPECT_EQ(StatsMgr::instance().getSize("foo"), 100);
+}
+
+// Test checks whether setting age limit and count limit to existing
+// statistics works properly.
+TEST_F(StatsMgrTest, setLimitsAll) {
+ // Set a couple of statistics
+ StatsMgr::instance().setValue("alpha", static_cast<int64_t>(1234));
+ StatsMgr::instance().setValue("beta", 12.34);
+ StatsMgr::instance().setValue("gamma", dur1234);
+ StatsMgr::instance().setValue("delta", "Lorem ipsum");
+
+ // check the setting of time limit to existing statistics
+ EXPECT_NO_THROW(StatsMgr::instance().setMaxSampleAgeAll(seconds(1)));
+
+ // check if time limit was set properly and whether count limit is disabled
+ EXPECT_EQ(StatsMgr::instance().getObservation("alpha")->getMaxSampleAge().first, true);
+ EXPECT_EQ(StatsMgr::instance().getObservation("alpha")->getMaxSampleAge().second,
+ seconds(1));
+ EXPECT_EQ(StatsMgr::instance().getObservation("alpha")->getMaxSampleCount().first, false);
+
+ EXPECT_EQ(StatsMgr::instance().getObservation("beta")->getMaxSampleAge().first, true);
+ EXPECT_EQ(StatsMgr::instance().getObservation("beta")->getMaxSampleAge().second,
+ seconds(1));
+ EXPECT_EQ(StatsMgr::instance().getObservation("beta")->getMaxSampleCount().first, false);
+
+ EXPECT_EQ(StatsMgr::instance().getObservation("gamma")->getMaxSampleAge().first, true);
+ EXPECT_EQ(StatsMgr::instance().getObservation("gamma")->getMaxSampleAge().second,
+ seconds(1));
+ EXPECT_EQ(StatsMgr::instance().getObservation("gamma")->getMaxSampleCount().first, false);
+
+ EXPECT_EQ(StatsMgr::instance().getObservation("delta")->getMaxSampleAge().first, true);
+ EXPECT_EQ(StatsMgr::instance().getObservation("delta")->getMaxSampleAge().second,
+ seconds(1));
+ EXPECT_EQ(StatsMgr::instance().getObservation("delta")->getMaxSampleCount().first, false);
+
+ // check the setting of count limit to existing statistics
+ EXPECT_NO_THROW(StatsMgr::instance().setMaxSampleCountAll(1200));
+
+ // check if count limit was set properly and whether count limit is disabled
+ EXPECT_EQ(StatsMgr::instance().getObservation("alpha")->getMaxSampleCount().first, true);
+ EXPECT_EQ(StatsMgr::instance().getObservation("alpha")->getMaxSampleCount().second, 1200);
+ EXPECT_EQ(StatsMgr::instance().getObservation("alpha")->getMaxSampleAge().first, false);
+
+ EXPECT_EQ(StatsMgr::instance().getObservation("beta")->getMaxSampleCount().first, true);
+ EXPECT_EQ(StatsMgr::instance().getObservation("beta")->getMaxSampleCount().second, 1200);
+ EXPECT_EQ(StatsMgr::instance().getObservation("beta")->getMaxSampleAge().first, false);
+
+ EXPECT_EQ(StatsMgr::instance().getObservation("gamma")->getMaxSampleCount().first, true);
+ EXPECT_EQ(StatsMgr::instance().getObservation("gamma")->getMaxSampleCount().second, 1200);
+ EXPECT_EQ(StatsMgr::instance().getObservation("gamma")->getMaxSampleAge().first, false);
+
+ EXPECT_EQ(StatsMgr::instance().getObservation("delta")->getMaxSampleCount().first, true);
+ EXPECT_EQ(StatsMgr::instance().getObservation("delta")->getMaxSampleCount().second, 1200);
+ EXPECT_EQ(StatsMgr::instance().getObservation("delta")->getMaxSampleAge().first, false);
+}
+
+// Test checks whether setting default age limit and count limit works
+// properly.
+TEST_F(StatsMgrTest, setLimitsDefault) {
+ ASSERT_EQ(StatsMgr::instance().getMaxSampleCountDefault(), 20);
+ ASSERT_EQ(StatsMgr::instance().getMaxSampleAgeDefault(), StatsDuration::zero());
+
+ // Set a couple of statistics
+ StatsMgr::instance().setValue("alpha", static_cast<int64_t>(1234));
+ StatsMgr::instance().setValue("beta", 12.34);
+ StatsMgr::instance().setValue("gamma", seconds(1234));
+ StatsMgr::instance().setValue("delta", "Lorem ipsum");
+
+ // check what default applied
+ EXPECT_EQ(StatsMgr::instance().getObservation("alpha")->getMaxSampleCount().first, true);
+ EXPECT_EQ(StatsMgr::instance().getObservation("alpha")->getMaxSampleCount().second, 20);
+ EXPECT_EQ(StatsMgr::instance().getObservation("alpha")->getMaxSampleAge().first, false);
+ EXPECT_EQ(StatsMgr::instance().getObservation("alpha")->getMaxSampleAge().second, StatsDuration::zero());
+ EXPECT_EQ(StatsMgr::instance().getObservation("beta")->getMaxSampleCount().first, true);
+ EXPECT_EQ(StatsMgr::instance().getObservation("beta")->getMaxSampleCount().second, 20);
+ EXPECT_EQ(StatsMgr::instance().getObservation("beta")->getMaxSampleAge().first, false);
+ EXPECT_EQ(StatsMgr::instance().getObservation("beta")->getMaxSampleAge().second, StatsDuration::zero());
+ EXPECT_EQ(StatsMgr::instance().getObservation("gamma")->getMaxSampleCount().first, true);
+ EXPECT_EQ(StatsMgr::instance().getObservation("gamma")->getMaxSampleCount().second, 20);
+ EXPECT_EQ(StatsMgr::instance().getObservation("gamma")->getMaxSampleAge().first, false);
+ EXPECT_EQ(StatsMgr::instance().getObservation("gamma")->getMaxSampleAge().second, StatsDuration::zero());
+ EXPECT_EQ(StatsMgr::instance().getObservation("delta")->getMaxSampleCount().first, true);
+ EXPECT_EQ(StatsMgr::instance().getObservation("delta")->getMaxSampleCount().second, 20);
+ EXPECT_EQ(StatsMgr::instance().getObservation("delta")->getMaxSampleAge().first, false);
+ EXPECT_EQ(StatsMgr::instance().getObservation("delta")->getMaxSampleAge().second, StatsDuration::zero());
+
+ // Retry with another default count limits.
+ EXPECT_NO_THROW(StatsMgr::instance().setMaxSampleCountDefault(10));
+ EXPECT_NO_THROW(StatsMgr::instance().setMaxSampleAgeDefault(seconds(5)));
+ ASSERT_EQ(StatsMgr::instance().getMaxSampleCountDefault(), 10);
+ ASSERT_EQ(StatsMgr::instance().getMaxSampleAgeDefault(), seconds(5));
+
+ // Check the existing statistics were not updated.
+ EXPECT_EQ(StatsMgr::instance().getObservation("alpha")->getMaxSampleCount().first, true);
+ EXPECT_EQ(StatsMgr::instance().getObservation("alpha")->getMaxSampleCount().second, 20);
+ EXPECT_EQ(StatsMgr::instance().getObservation("alpha")->getMaxSampleAge().first, false);
+ EXPECT_EQ(StatsMgr::instance().getObservation("alpha")->getMaxSampleAge().second, StatsDuration::zero());
+ EXPECT_EQ(StatsMgr::instance().getObservation("beta")->getMaxSampleCount().first, true);
+ EXPECT_EQ(StatsMgr::instance().getObservation("beta")->getMaxSampleCount().second, 20);
+ EXPECT_EQ(StatsMgr::instance().getObservation("beta")->getMaxSampleAge().first, false);
+ EXPECT_EQ(StatsMgr::instance().getObservation("beta")->getMaxSampleAge().second, StatsDuration::zero());
+ EXPECT_EQ(StatsMgr::instance().getObservation("gamma")->getMaxSampleCount().first, true);
+ EXPECT_EQ(StatsMgr::instance().getObservation("gamma")->getMaxSampleCount().second, 20);
+ EXPECT_EQ(StatsMgr::instance().getObservation("gamma")->getMaxSampleAge().first, false);
+ EXPECT_EQ(StatsMgr::instance().getObservation("gamma")->getMaxSampleAge().second, StatsDuration::zero());
+ EXPECT_EQ(StatsMgr::instance().getObservation("delta")->getMaxSampleCount().first, true);
+ EXPECT_EQ(StatsMgr::instance().getObservation("delta")->getMaxSampleCount().second, 20);
+ EXPECT_EQ(StatsMgr::instance().getObservation("delta")->getMaxSampleAge().first, false);
+ EXPECT_EQ(StatsMgr::instance().getObservation("delta")->getMaxSampleAge().second, StatsDuration::zero());
+
+ // Remove all test statistics.
+ EXPECT_NO_THROW(StatsMgr::instance().removeAll());
+
+ StatsMgr::instance().setValue("alpha", static_cast<int64_t>(1234));
+ StatsMgr::instance().setValue("beta", 12.34);
+ StatsMgr::instance().setValue("gamma", seconds(1234));
+ StatsMgr::instance().setValue("delta", "Lorem ipsum");
+
+ EXPECT_EQ(StatsMgr::instance().getObservation("alpha")->getMaxSampleCount().first, true);
+ EXPECT_EQ(StatsMgr::instance().getObservation("alpha")->getMaxSampleCount().second, 10);
+ EXPECT_EQ(StatsMgr::instance().getObservation("alpha")->getMaxSampleAge().first, false);
+ EXPECT_EQ(StatsMgr::instance().getObservation("alpha")->getMaxSampleAge().second, seconds(5));
+ EXPECT_EQ(StatsMgr::instance().getObservation("beta")->getMaxSampleCount().first, true);
+ EXPECT_EQ(StatsMgr::instance().getObservation("beta")->getMaxSampleCount().second, 10);
+ EXPECT_EQ(StatsMgr::instance().getObservation("beta")->getMaxSampleAge().first, false);
+ EXPECT_EQ(StatsMgr::instance().getObservation("beta")->getMaxSampleAge().second, seconds(5));
+ EXPECT_EQ(StatsMgr::instance().getObservation("gamma")->getMaxSampleCount().first, true);
+ EXPECT_EQ(StatsMgr::instance().getObservation("gamma")->getMaxSampleCount().second, 10);
+ EXPECT_EQ(StatsMgr::instance().getObservation("gamma")->getMaxSampleAge().first, false);
+ EXPECT_EQ(StatsMgr::instance().getObservation("gamma")->getMaxSampleAge().second, seconds(5));
+ EXPECT_EQ(StatsMgr::instance().getObservation("delta")->getMaxSampleCount().first, true);
+ EXPECT_EQ(StatsMgr::instance().getObservation("delta")->getMaxSampleCount().second, 10);
+ EXPECT_EQ(StatsMgr::instance().getObservation("delta")->getMaxSampleAge().first, false);
+ EXPECT_EQ(StatsMgr::instance().getObservation("delta")->getMaxSampleAge().second, seconds(5));
+
+ // Retry with count limit disable.
+ EXPECT_NO_THROW(StatsMgr::instance().setMaxSampleCountDefault(0));
+ ASSERT_EQ(StatsMgr::instance().getMaxSampleCountDefault(), 0);
+
+ // Check the existing statistics were not updated.
+ EXPECT_EQ(StatsMgr::instance().getObservation("alpha")->getMaxSampleCount().first, true);
+ EXPECT_EQ(StatsMgr::instance().getObservation("alpha")->getMaxSampleCount().second, 10);
+ EXPECT_EQ(StatsMgr::instance().getObservation("alpha")->getMaxSampleAge().first, false);
+ EXPECT_EQ(StatsMgr::instance().getObservation("alpha")->getMaxSampleAge().second, seconds(5));
+ EXPECT_EQ(StatsMgr::instance().getObservation("beta")->getMaxSampleCount().first, true);
+ EXPECT_EQ(StatsMgr::instance().getObservation("beta")->getMaxSampleCount().second, 10);
+ EXPECT_EQ(StatsMgr::instance().getObservation("beta")->getMaxSampleAge().first, false);
+ EXPECT_EQ(StatsMgr::instance().getObservation("beta")->getMaxSampleAge().second, seconds(5));
+ EXPECT_EQ(StatsMgr::instance().getObservation("gamma")->getMaxSampleCount().first, true);
+ EXPECT_EQ(StatsMgr::instance().getObservation("gamma")->getMaxSampleCount().second, 10);
+ EXPECT_EQ(StatsMgr::instance().getObservation("gamma")->getMaxSampleAge().first, false);
+ EXPECT_EQ(StatsMgr::instance().getObservation("gamma")->getMaxSampleAge().second, seconds(5));
+ EXPECT_EQ(StatsMgr::instance().getObservation("delta")->getMaxSampleCount().first, true);
+ EXPECT_EQ(StatsMgr::instance().getObservation("delta")->getMaxSampleCount().second, 10);
+ EXPECT_EQ(StatsMgr::instance().getObservation("delta")->getMaxSampleAge().first, false);
+ EXPECT_EQ(StatsMgr::instance().getObservation("delta")->getMaxSampleAge().second, seconds(5));
+
+ // Remove all test statistics.
+ EXPECT_NO_THROW(StatsMgr::instance().removeAll());
+
+ StatsMgr::instance().setValue("alpha", static_cast<int64_t>(1234));
+ StatsMgr::instance().setValue("beta", 12.34);
+ StatsMgr::instance().setValue("gamma", seconds(1234));
+ StatsMgr::instance().setValue("delta", "Lorem ipsum");
+
+ EXPECT_EQ(StatsMgr::instance().getObservation("alpha")->getMaxSampleCount().first, false);
+ EXPECT_EQ(StatsMgr::instance().getObservation("alpha")->getMaxSampleCount().second, 10);
+ EXPECT_EQ(StatsMgr::instance().getObservation("alpha")->getMaxSampleAge().first, true);
+ EXPECT_EQ(StatsMgr::instance().getObservation("alpha")->getMaxSampleAge().second, seconds(5));
+ EXPECT_EQ(StatsMgr::instance().getObservation("beta")->getMaxSampleCount().first, false);
+ EXPECT_EQ(StatsMgr::instance().getObservation("beta")->getMaxSampleCount().second, 10);
+ EXPECT_EQ(StatsMgr::instance().getObservation("beta")->getMaxSampleAge().first, true);
+ EXPECT_EQ(StatsMgr::instance().getObservation("beta")->getMaxSampleAge().second, seconds(5));
+ EXPECT_EQ(StatsMgr::instance().getObservation("gamma")->getMaxSampleCount().first, false);
+ EXPECT_EQ(StatsMgr::instance().getObservation("gamma")->getMaxSampleCount().second, 10);
+ EXPECT_EQ(StatsMgr::instance().getObservation("gamma")->getMaxSampleAge().first, true);
+ EXPECT_EQ(StatsMgr::instance().getObservation("gamma")->getMaxSampleAge().second, seconds(5));
+ EXPECT_EQ(StatsMgr::instance().getObservation("delta")->getMaxSampleCount().first, false);
+ EXPECT_EQ(StatsMgr::instance().getObservation("delta")->getMaxSampleCount().second, 10);
+ EXPECT_EQ(StatsMgr::instance().getObservation("delta")->getMaxSampleAge().first, true);
+ EXPECT_EQ(StatsMgr::instance().getObservation("delta")->getMaxSampleAge().second, seconds(5));
+
+ EXPECT_NO_THROW(StatsMgr::instance().setMaxSampleCountDefault(20));
+ EXPECT_NO_THROW(StatsMgr::instance().setMaxSampleAgeDefault(StatsDuration::zero()));
+}
+
+// This test checks whether a single (get("foo")) and all (getAll())
+// statistics are reported properly.
+TEST_F(StatsMgrTest, getGetAll) {
+ // Set a couple of statistics
+ StatsMgr::instance().setValue("alpha", static_cast<int64_t>(1234));
+ StatsMgr::instance().setValue("beta", 12.34);
+ StatsMgr::instance().setValue("gamma", dur1234);
+ StatsMgr::instance().setValue("delta", "Lorem");
+
+ // The string's representation of firstly added statistics
+ std::string alpha_first = ", [ 1234, \"" +
+ isc::util::clockToText(StatsMgr::instance().getObservation("alpha")
+ ->getInteger().second) + "\" ] ]";
+ std::string beta_first = ", [ 12.34, \"" +
+ isc::util::clockToText(StatsMgr::instance().getObservation("beta")
+ ->getFloat().second) + "\" ] ]";
+ std::string gamma_first = ", [ \"01:02:03.004000\", \"" +
+ isc::util::clockToText(StatsMgr::instance().getObservation("gamma")
+ ->getDuration().second) + "\" ] ]";
+ std::string delta_first = ", [ \"Lorem\", \"" +
+ isc::util::clockToText(StatsMgr::instance().getObservation("delta")
+ ->getString().second) + "\" ] ]";
+
+ // Now add some values to them
+ StatsMgr::instance().addValue("alpha", static_cast<int64_t>(5678));
+ StatsMgr::instance().addValue("beta", 56.78);
+ StatsMgr::instance().addValue("gamma", dur5678);
+ StatsMgr::instance().addValue("delta", " ipsum");
+
+ // There should be 4 statistics reported
+ EXPECT_EQ(4, StatsMgr::instance().count());
+
+ // Now check whether they can be reported back
+ ConstElementPtr rep_alpha = StatsMgr::instance().get("alpha");
+ ConstElementPtr rep_beta = StatsMgr::instance().get("beta");
+ ConstElementPtr rep_gamma = StatsMgr::instance().get("gamma");
+ ConstElementPtr rep_delta = StatsMgr::instance().get("delta");
+
+ ASSERT_TRUE(rep_alpha);
+ ASSERT_TRUE(rep_beta);
+ ASSERT_TRUE(rep_gamma);
+ ASSERT_TRUE(rep_delta);
+
+ std::string exp_str_alpha = "[ [ 6912, \"" +
+ isc::util::clockToText(StatsMgr::instance().getObservation("alpha")
+ ->getInteger().second) + "\" ]" + alpha_first;
+ std::string exp_str_beta = "[ [ 69.12, \"" +
+ isc::util::clockToText(StatsMgr::instance().getObservation("beta")
+ ->getFloat().second) + "\" ]" + beta_first;
+ std::string exp_str_gamma = "[ [ \"06:08:10.012000\", \"" +
+ isc::util::clockToText(StatsMgr::instance().getObservation("gamma")
+ ->getDuration().second) + "\" ]" + gamma_first;
+ std::string exp_str_delta = "[ [ \"Lorem ipsum\", \"" +
+ isc::util::clockToText(StatsMgr::instance().getObservation("delta")
+ ->getString().second) + "\" ]" + delta_first;
+
+ // Check that individual stats are reported properly
+ EXPECT_EQ("{ \"alpha\": " + exp_str_alpha + " }", rep_alpha->str());
+ EXPECT_EQ("{ \"beta\": " + exp_str_beta + " }", rep_beta->str());
+ EXPECT_EQ("{ \"gamma\": " + exp_str_gamma + " }", rep_gamma->str());
+ EXPECT_EQ("{ \"delta\": " + exp_str_delta + " }", rep_delta->str());
+
+ // Check that non-existent metric is not reported.
+ EXPECT_EQ("{ }", StatsMgr::instance().get("epsilon")->str());
+
+ // Check that all of them can be reported at once
+ ConstElementPtr rep_all = StatsMgr::instance().getAll();
+ ASSERT_TRUE(rep_all);
+
+ // Verifying this is a bit more involved, as we don't know whether the
+ // order would be preserved or not.
+ EXPECT_EQ(4, rep_all->size());
+ ASSERT_TRUE(rep_all->get("alpha"));
+ ASSERT_TRUE(rep_all->get("beta"));
+ ASSERT_TRUE(rep_all->get("delta"));
+ ASSERT_TRUE(rep_all->get("gamma"));
+ EXPECT_FALSE(rep_all->get("epsilon"));
+
+ EXPECT_EQ(exp_str_alpha, rep_all->get("alpha")->str());
+ EXPECT_EQ(exp_str_beta, rep_all->get("beta")->str());
+ EXPECT_EQ(exp_str_gamma, rep_all->get("gamma")->str());
+ EXPECT_EQ(exp_str_delta, rep_all->get("delta")->str());
+}
+
+// This test checks whether existing statistics can be reset.
+TEST_F(StatsMgrTest, reset) {
+ // Set a couple of statistics
+ StatsMgr::instance().setValue("alpha", static_cast<int64_t>(1234));
+ StatsMgr::instance().setValue("beta", 12.34);
+ StatsMgr::instance().setValue("gamma", dur1234);
+ StatsMgr::instance().setValue("delta", "Lorem ipsum");
+
+ // This should reset alpha to 0
+ EXPECT_NO_THROW(StatsMgr::instance().reset("alpha"));
+ EXPECT_EQ(0,
+ StatsMgr::instance().getObservation("alpha")->getInteger().first);
+
+ // The other stats should remain untouched
+ EXPECT_EQ(12.34,
+ StatsMgr::instance().getObservation("beta")->getFloat().first);
+ EXPECT_EQ(dur1234,
+ StatsMgr::instance().getObservation("gamma")->getDuration().first);
+ EXPECT_EQ("Lorem ipsum",
+ StatsMgr::instance().getObservation("delta")->getString().first);
+
+ // Now let's wipe them, too.
+ EXPECT_NO_THROW(StatsMgr::instance().reset("beta"));
+ EXPECT_NO_THROW(StatsMgr::instance().reset("gamma"));
+ EXPECT_NO_THROW(StatsMgr::instance().reset("delta"));
+ EXPECT_EQ(0.0,
+ StatsMgr::instance().getObservation("beta")->getFloat().first);
+ EXPECT_EQ(StatsDuration::zero(),
+ StatsMgr::instance().getObservation("gamma")->getDuration().first);
+ EXPECT_EQ("",
+ StatsMgr::instance().getObservation("delta")->getString().first);
+
+ // Resetting statistics should not remove them
+ EXPECT_EQ(4, StatsMgr::instance().count());
+}
+
+// This test checks whether existing statistics can be reset.
+TEST_F(StatsMgrTest, resetAll) {
+ // Set a couple of statistics
+ StatsMgr::instance().setValue("alpha", static_cast<int64_t>(1234));
+ StatsMgr::instance().setValue("beta", 12.34);
+ StatsMgr::instance().setValue("gamma", dur1234);
+ StatsMgr::instance().setValue("delta", "Lorem ipsum");
+
+ // This should reset alpha to 0
+ EXPECT_NO_THROW(StatsMgr::instance().resetAll());
+ EXPECT_EQ(0,
+ StatsMgr::instance().getObservation("alpha")->getInteger().first);
+ EXPECT_EQ(0.0,
+ StatsMgr::instance().getObservation("beta")->getFloat().first);
+ EXPECT_EQ(StatsDuration::zero(),
+ StatsMgr::instance().getObservation("gamma")->getDuration().first);
+ EXPECT_EQ("",
+ StatsMgr::instance().getObservation("delta")->getString().first);
+
+ // Resetting all statistics should not remove them
+ EXPECT_EQ(4, StatsMgr::instance().count());
+}
+
+// This test checks whether statistics can be removed.
+TEST_F(StatsMgrTest, removeAll) {
+ // Set a couple of statistics
+ StatsMgr::instance().setValue("alpha", static_cast<int64_t>(1234));
+ StatsMgr::instance().setValue("beta", 12.34);
+ StatsMgr::instance().setValue("gamma", dur1234);
+ StatsMgr::instance().setValue("delta", "Lorem ipsum");
+
+ // This should reset alpha to 0
+ EXPECT_NO_THROW(StatsMgr::instance().removeAll());
+
+ // Resetting all statistics should not remove them
+ EXPECT_EQ(0, StatsMgr::instance().count());
+
+ // There should be no such statistics anymore
+ EXPECT_EQ("{ }", StatsMgr::instance().get("alpha")->str());
+ EXPECT_EQ("{ }", StatsMgr::instance().get("beta")->str());
+ EXPECT_EQ("{ }", StatsMgr::instance().get("gamma")->str());
+ EXPECT_EQ("{ }", StatsMgr::instance().get("delta")->str());
+
+ // There should be no such statistics anymore
+ EXPECT_FALSE(StatsMgr::instance().getObservation("alpha"));
+ EXPECT_FALSE(StatsMgr::instance().getObservation("beta"));
+ EXPECT_FALSE(StatsMgr::instance().getObservation("gamma"));
+ EXPECT_FALSE(StatsMgr::instance().getObservation("delta"));
+}
+
+// This is a performance benchmark that checks how long does it take
+// to increment a single statistic million times.
+//
+// Data points:
+// It took 00:00:00.363709 (363ms) on late 2013 Mac with Mac OS X 10.9.5.
+TEST_F(StatsMgrTest, DISABLED_performanceSingleAdd) {
+ StatsMgr::instance().removeAll();
+
+ uint32_t cycles = 1000000;
+
+ auto before = SampleClock::now();
+ for (uint32_t i = 0; i < cycles; ++i) {
+ StatsMgr::instance().addValue("metric1", 0.1 * i);
+ }
+ auto after = SampleClock::now();
+
+ auto dur = after - before;
+
+ std::cout << "Incrementing a single statistic " << cycles << " times took: "
+ << isc::util::durationToText(dur) << std::endl;
+}
+
+// This is a performance benchmark that checks how long does it take
+// to set absolute value of a single statistic million times.
+//
+// Data points:
+// It took 00:00:00.361003 (361ms) on late 2013 Mac with Mac OS X 10.9.5.
+TEST_F(StatsMgrTest, DISABLED_performanceSingleSet) {
+ StatsMgr::instance().removeAll();
+
+ uint32_t cycles = 1000000;
+
+ auto before = SampleClock::now();
+ for (uint32_t i = 0; i < cycles; ++i) {
+ StatsMgr::instance().setValue("metric1", 0.1 * i);
+ }
+ auto after = SampleClock::now();
+
+ auto dur = after - before;
+
+ std::cout << "Setting a single statistic " << cycles << " times took: "
+ << isc::util::durationToText(dur) << std::endl;
+}
+
+// This is a performance benchmark that checks how long does it take to
+// increment one statistic a million times, when there is 1000 other statistics
+// present.
+//
+// Data points:
+// 00:00:00.436943 (436ms) on late 2013 Mac with Mac OS X 10.9.5
+TEST_F(StatsMgrTest, DISABLED_performanceMultipleAdd) {
+ StatsMgr::instance().removeAll();
+
+ uint32_t cycles = 1000000;
+ uint32_t stats = 1000;
+
+ for (uint32_t i = 0; i < stats; ++i) {
+ std::stringstream tmp;
+ tmp << "statistic" << i;
+ StatsMgr::instance().setValue(tmp.str(), static_cast<int64_t>(i));
+ }
+
+ auto before = SampleClock::now();
+ for (uint32_t i = 0; i < cycles; ++i) {
+ StatsMgr::instance().addValue("metric1", static_cast<int64_t>(i));
+ }
+ auto after = SampleClock::now();
+
+ auto dur = after - before;
+
+ std::cout << "Incrementing one of " << stats << " statistics " << cycles
+ << " times took: " << isc::util::durationToText(dur) << std::endl;
+}
+
+// This is a performance benchmark that checks how long does it take to
+// set one statistic to a given value a million times, when there is 1000 other
+// statistics present.
+//
+// Data points:
+// 00:00:00.424518 (424ms) on late 2013 Mac with Mac OS X 10.9.5
+TEST_F(StatsMgrTest, DISABLED_performanceMultipleSet) {
+ StatsMgr::instance().removeAll();
+
+ uint32_t cycles = 1000000;
+ uint32_t stats = 1000;
+
+ for (uint32_t i = 0; i < stats; ++i) {
+ std::stringstream tmp;
+ tmp << "statistic" << i;
+ StatsMgr::instance().setValue(tmp.str(), static_cast<int64_t>(i));
+ }
+
+ auto before = SampleClock::now();
+ for (uint32_t i = 0; i < cycles; ++i) {
+ StatsMgr::instance().setValue("metric1", static_cast<int64_t>(i));
+ }
+ auto after = SampleClock::now();
+
+ auto dur = after - before;
+
+ std::cout << "Setting one of " << stats << " statistics " << cycles
+ << " times took: " << isc::util::durationToText(dur) << std::endl;
+}
+
+// Test checks whether statistics name can be generated using various
+// indexes.
+TEST_F(StatsMgrTest, generateName) {
+ // generateName is a templated method, so in principle anything printable
+ // to stream can be used as index. However, in practice only integers
+ // and possibly strings will be used.
+
+ // Let's text integer as index.
+ EXPECT_EQ("subnet[123].pkt4-received",
+ StatsMgr::generateName("subnet", 123, "pkt4-received"));
+
+ // Lets' test string as index.
+ EXPECT_EQ("subnet[foo].pkt4-received",
+ StatsMgr::generateName("subnet", "foo", "pkt4-received"));
+}
+
+// Test checks if statistic-get handler is able to return specified statistic.
+TEST_F(StatsMgrTest, commandStatisticGet) {
+ StatsMgr::instance().setValue("alpha", static_cast<int64_t>(1234));
+
+ ElementPtr params = Element::createMap();
+ params->set("name", Element::create("alpha"));
+
+ ConstElementPtr rsp = StatsMgr::instance().statisticGetHandler("statistic-get",
+ params);
+
+ ObservationPtr alpha;
+ EXPECT_NO_THROW(alpha = StatsMgr::instance().getObservation("alpha"));
+ ASSERT_TRUE(alpha);
+
+ std::string exp = "{ \"alpha\": [ [ 1234, \"" +
+ isc::util::clockToText(alpha->getInteger().second) + "\" ] ] }";
+
+ EXPECT_EQ("{ \"arguments\": " + exp + ", \"result\": 0 }", rsp->str());
+}
+
+// Test checks if statistic-get is able to handle:
+// - a request without parameters
+// - a request with missing statistic name
+// - a request for non-existing statistic.
+TEST_F(StatsMgrTest, commandStatisticGetNegative) {
+ // Case 1: a request without parameters
+ ConstElementPtr rsp = StatsMgr::instance().statisticGetHandler("statistic-get",
+ ElementPtr());
+ int status_code;
+ ASSERT_NO_THROW(parseAnswer(status_code, rsp));
+ EXPECT_EQ(status_code, CONTROL_RESULT_ERROR);
+
+ // Case 2: a request with missing statistic name
+ ElementPtr params = Element::createMap();
+ rsp = StatsMgr::instance().statisticGetHandler("statistic-get", params);
+ ASSERT_NO_THROW(parseAnswer(status_code, rsp));
+ EXPECT_EQ(status_code, CONTROL_RESULT_ERROR);
+
+ // Case 3: a request for non-existing statistic
+ params->set("name", Element::create("alpha"));
+ rsp = StatsMgr::instance().statisticGetHandler("statistic-get", params);
+ EXPECT_EQ("{ \"arguments\": { }, \"result\": 0 }", rsp->str());
+}
+
+// This test checks whether statistic-get-all command returns all statistics
+// correctly.
+TEST_F(StatsMgrTest, commandGetAll) {
+ // Set a couple of statistics
+ StatsMgr::instance().setValue("alpha", static_cast<int64_t>(1234));
+ StatsMgr::instance().setValue("beta", 12.34);
+ StatsMgr::instance().setValue("gamma", dur1234);
+ StatsMgr::instance().setValue("delta", "Lorem ipsum");
+
+ // Now get them. They're used to generate expected output
+ ConstElementPtr rep_alpha = StatsMgr::instance().get("alpha");
+ ConstElementPtr rep_beta = StatsMgr::instance().get("beta");
+ ConstElementPtr rep_gamma = StatsMgr::instance().get("gamma");
+ ConstElementPtr rep_delta = StatsMgr::instance().get("delta");
+
+ ASSERT_TRUE(rep_alpha);
+ ASSERT_TRUE(rep_beta);
+ ASSERT_TRUE(rep_gamma);
+ ASSERT_TRUE(rep_delta);
+
+ std::string exp_str_alpha = "[ [ 1234, \"" +
+ isc::util::clockToText(StatsMgr::instance().getObservation("alpha")
+ ->getInteger().second) + "\" ] ]";
+ std::string exp_str_beta = "[ [ 12.34, \"" +
+ isc::util::clockToText(StatsMgr::instance().getObservation("beta")
+ ->getFloat().second) + "\" ] ]";
+ std::string exp_str_gamma = "[ [ \"01:02:03.004000\", \"" +
+ isc::util::clockToText(StatsMgr::instance().getObservation("gamma")
+ ->getDuration().second) + "\" ] ]";
+ std::string exp_str_delta = "[ [ \"Lorem ipsum\", \"" +
+ isc::util::clockToText(StatsMgr::instance().getObservation("delta")
+ ->getString().second) + "\" ] ]";
+
+ // Check that all of them can be reported at once
+ ConstElementPtr rsp = StatsMgr::instance().statisticGetAllHandler(
+ "statistic-get-all", ElementPtr());
+ ASSERT_TRUE(rsp);
+ int status_code;
+ ConstElementPtr rep_all = parseAnswer(status_code, rsp);
+ ASSERT_EQ(0, status_code);
+ ASSERT_TRUE(rep_all);
+
+ // Verifying this is a bit more involved, as we don't know whether the
+ // order would be preserved or not.
+ EXPECT_EQ(4, rep_all->size());
+ ASSERT_TRUE(rep_all->get("alpha"));
+ ASSERT_TRUE(rep_all->get("beta"));
+ ASSERT_TRUE(rep_all->get("delta"));
+ ASSERT_TRUE(rep_all->get("gamma"));
+ EXPECT_FALSE(rep_all->get("epsilon"));
+
+ EXPECT_EQ(exp_str_alpha, rep_all->get("alpha")->str());
+ EXPECT_EQ(exp_str_beta, rep_all->get("beta")->str());
+ EXPECT_EQ(exp_str_gamma, rep_all->get("gamma")->str());
+ EXPECT_EQ(exp_str_delta, rep_all->get("delta")->str());
+}
+
+// Test checks if statistic-reset handler is able to reset specified statistic.
+TEST_F(StatsMgrTest, commandStatisticReset) {
+ StatsMgr::instance().setValue("alpha", static_cast<int64_t>(1234));
+
+ ElementPtr params = Element::createMap();
+ params->set("name", Element::create("alpha"));
+
+ ConstElementPtr rsp =
+ StatsMgr::instance().statisticResetHandler("statistic-reset", params);
+ int status_code;
+ ASSERT_NO_THROW(parseAnswer(status_code, rsp));
+ EXPECT_EQ(CONTROL_RESULT_SUCCESS, status_code);
+
+ ObservationPtr alpha;
+ EXPECT_NO_THROW(alpha = StatsMgr::instance().getObservation("alpha"));
+ ASSERT_TRUE(alpha);
+
+ // Check that it was indeed reset
+ EXPECT_EQ(0, alpha->getInteger().first);
+}
+
+// Test checks if statistic-reset is able to handle:
+// - a request without parameters
+// - a request with missing statistic name
+// - a request for non-existing statistic.
+TEST_F(StatsMgrTest, commandStatisticResetNegative) {
+ // Case 1: a request without parameters
+ ConstElementPtr rsp =
+ StatsMgr::instance().statisticResetHandler("statistic-reset", ElementPtr());
+ int status_code;
+ ASSERT_NO_THROW(parseAnswer(status_code, rsp));
+ EXPECT_EQ(status_code, CONTROL_RESULT_ERROR);
+
+ // Case 2: a request with missing statistic name
+ ElementPtr params = Element::createMap();
+ rsp = StatsMgr::instance().statisticResetHandler("statistic-reset", params);
+ ASSERT_NO_THROW(parseAnswer(status_code, rsp));
+ EXPECT_EQ(status_code, CONTROL_RESULT_ERROR);
+
+ // Case 3: a request for non-existing statistic
+ params->set("name", Element::create("alpha"));
+ rsp = StatsMgr::instance().statisticResetHandler("statistic-reset", params);
+ EXPECT_EQ("{ \"result\": 1, \"text\": \"No 'alpha' statistic found\" }",
+ rsp->str());
+}
+
+// This test checks whether statistic-reset-all command really resets all
+// statistics correctly.
+TEST_F(StatsMgrTest, commandResetAll) {
+ // Set a couple of statistics
+ StatsMgr::instance().setValue("alpha", static_cast<int64_t>(1234));
+ StatsMgr::instance().setValue("beta", 12.34);
+ StatsMgr::instance().setValue("gamma", dur1234);
+ StatsMgr::instance().setValue("delta", "Lorem ipsum");
+
+ // Now get them. They're used to generate expected output
+ ConstElementPtr rep_alpha = StatsMgr::instance().get("alpha");
+ ConstElementPtr rep_beta = StatsMgr::instance().get("beta");
+ ConstElementPtr rep_gamma = StatsMgr::instance().get("gamma");
+ ConstElementPtr rep_delta = StatsMgr::instance().get("delta");
+
+ ASSERT_TRUE(rep_alpha);
+ ASSERT_TRUE(rep_beta);
+ ASSERT_TRUE(rep_gamma);
+ ASSERT_TRUE(rep_delta);
+
+ std::string exp_str_alpha = "[ [ 1234, \"" +
+ isc::util::clockToText(StatsMgr::instance().getObservation("alpha")
+ ->getInteger().second) + "\" ] ]";
+ std::string exp_str_beta = "[ [ 12.34, \"" +
+ isc::util::clockToText(StatsMgr::instance().getObservation("beta")
+ ->getFloat().second) + "\" ] ]";
+ std::string exp_str_gamma = "[ [ \"01:02:03.004000\", \"" +
+ isc::util::clockToText(StatsMgr::instance().getObservation("gamma")
+ ->getDuration().second) + "\" ] ]";
+ std::string exp_str_delta = "[ [ \"Lorem ipsum\", \"" +
+ isc::util::clockToText(StatsMgr::instance().getObservation("delta")
+ ->getString().second) + "\" ] ]";
+
+ // Check that all of them can be reset at once
+ ConstElementPtr rsp = StatsMgr::instance().statisticResetAllHandler(
+ "statistic-reset-all", ElementPtr());
+ ASSERT_TRUE(rsp);
+ int status_code;
+ ConstElementPtr rep_all = parseAnswer(status_code, rsp);
+ ASSERT_EQ(0, status_code);
+ ASSERT_TRUE(rep_all);
+
+ // Check that they're indeed reset
+ EXPECT_EQ(0,
+ StatsMgr::instance().getObservation("alpha")->getInteger().first);
+ EXPECT_EQ(0.0f,
+ StatsMgr::instance().getObservation("beta")->getFloat().first);
+ EXPECT_EQ(StatsDuration::zero(),
+ StatsMgr::instance().getObservation("gamma")->getDuration().first);
+ EXPECT_EQ("",
+ StatsMgr::instance().getObservation("delta")->getString().first);
+}
+
+// Test checks if statistic-remove handler is able to remove a statistic.
+TEST_F(StatsMgrTest, commandStatisticRemove) {
+ StatsMgr::instance().setValue("alpha", static_cast<int64_t>(1234));
+
+ ElementPtr params = Element::createMap();
+ params->set("name", Element::create("alpha"));
+
+ ConstElementPtr rsp =
+ StatsMgr::instance().statisticRemoveHandler("statistic-remove", params);
+ int status_code;
+ ASSERT_NO_THROW(parseAnswer(status_code, rsp));
+ EXPECT_EQ(CONTROL_RESULT_SUCCESS, status_code);
+
+ // It should be gone.
+ EXPECT_FALSE(StatsMgr::instance().getObservation("alpha"));
+ EXPECT_EQ(0, StatsMgr::instance().count());
+}
+
+// Test checks if statistic-remove is able to handle:
+// - a request without parameters
+// - a request with missing statistic name
+// - a request for non-existing statistic.
+TEST_F(StatsMgrTest, commandStatisticRemoveNegative) {
+ // Case 1: a request without parameters
+ ConstElementPtr rsp =
+ StatsMgr::instance().statisticRemoveHandler("statistic-remove", ElementPtr());
+ int status_code;
+ ASSERT_NO_THROW(parseAnswer(status_code, rsp));
+ EXPECT_EQ(status_code, CONTROL_RESULT_ERROR);
+
+ // Case 2: a request with missing statistic name
+ ElementPtr params = Element::createMap();
+ rsp = StatsMgr::instance().statisticRemoveHandler("statistic-remove", params);
+ ASSERT_NO_THROW(parseAnswer(status_code, rsp));
+ EXPECT_EQ(status_code, CONTROL_RESULT_ERROR);
+
+ // Case 3: a request for non-existing statistic
+ params->set("name", Element::create("alpha"));
+ rsp = StatsMgr::instance().statisticRemoveHandler("statistic-remove", params);
+ EXPECT_EQ("{ \"result\": 1, \"text\": \"No 'alpha' statistic found\" }",
+ rsp->str());
+}
+
+// This test checks whether statistic-remove-all command really resets all
+// statistics correctly.
+TEST_F(StatsMgrTest, commandRemoveAll) {
+ // Set a couple of statistics
+ StatsMgr::instance().setValue("alpha", static_cast<int64_t>(1234));
+ StatsMgr::instance().setValue("beta", 12.34);
+ StatsMgr::instance().setValue("gamma", dur1234);
+ StatsMgr::instance().setValue("delta", "Lorem ipsum");
+
+ // Check that all of them can be reset at once
+ ConstElementPtr rsp = StatsMgr::instance().statisticRemoveAllHandler(
+ "statistic-remove-all", ElementPtr());
+ ASSERT_TRUE(rsp);
+ int status_code;
+ ConstElementPtr rep_all = parseAnswer(status_code, rsp);
+ ASSERT_EQ(0, status_code);
+ ASSERT_TRUE(rep_all);
+ std::string exp = "\"Warning: statistic-remove-all command is deprecated.";
+ exp += " All statistics removed.\"";
+ EXPECT_EQ(exp, rep_all->str());
+
+ EXPECT_FALSE(StatsMgr::instance().getObservation("alpha"));
+ EXPECT_FALSE(StatsMgr::instance().getObservation("beta"));
+ EXPECT_FALSE(StatsMgr::instance().getObservation("gamma"));
+ EXPECT_FALSE(StatsMgr::instance().getObservation("delta"));
+ EXPECT_EQ(0, StatsMgr::instance().count());
+}
+
+// This test checks whether statistic-sample-age-set command really set
+// max_sample_age_ limit correctly.
+TEST_F(StatsMgrTest, commandSetMaxSampleAge) {
+ StatsMgr::instance().setValue("alpha", static_cast<int64_t>(1234));
+
+ ElementPtr params = Element::createMap();
+ params->set("name", Element::create("alpha"));
+ params->set("duration", Element::create(1245)); // minutes(20) + seconds(45)
+
+ ConstElementPtr rsp =
+ StatsMgr::instance().statisticSetMaxSampleAgeHandler("statistic-sample-age-set", params);
+ int status_code;
+ ASSERT_NO_THROW(parseAnswer(status_code, rsp));
+ EXPECT_EQ(CONTROL_RESULT_SUCCESS, status_code);
+
+ // check if time limit was set properly and whether count limit is disabled
+ EXPECT_EQ(StatsMgr::instance().getObservation("alpha")->getMaxSampleAge().first, true);
+ EXPECT_EQ(StatsMgr::instance().getObservation("alpha")->getMaxSampleAge().second,
+ minutes(20) + seconds(45));
+ EXPECT_EQ(StatsMgr::instance().getObservation("alpha")->getMaxSampleCount().first, false);
+}
+
+// Test checks if statistic-sample-age-set is able to handle:
+// - a request without parameters
+// - a request without duration parameter
+// - a request with missing statistic name
+// - a request for non-existing statistic.
+TEST_F(StatsMgrTest, commandSetMaxSampleAgeNegative) {
+ // Case 1: a request without parameters
+ ConstElementPtr rsp =
+ StatsMgr::instance().statisticSetMaxSampleAgeHandler("statistic-sample-age-set", ElementPtr());
+ int status_code;
+ ASSERT_NO_THROW(parseAnswer(status_code, rsp));
+ EXPECT_EQ(status_code, CONTROL_RESULT_ERROR);
+
+ // Case 2: a request without duration parameter
+ ElementPtr params = Element::createMap();
+ params->set("name", Element::create("alpha"));
+ rsp = StatsMgr::instance().statisticSetMaxSampleAgeHandler("statistic-sample-age-set", params);
+ ASSERT_NO_THROW(parseAnswer(status_code, rsp));
+ EXPECT_EQ(status_code, CONTROL_RESULT_ERROR);
+
+ // Case 3: a request with missing statistic name
+ params = Element::createMap();
+ params->set("duration", Element::create(100));
+ rsp = StatsMgr::instance().statisticSetMaxSampleAgeHandler("statistic-sample-age-set", params);
+ ASSERT_NO_THROW(parseAnswer(status_code, rsp));
+ EXPECT_EQ(status_code, CONTROL_RESULT_ERROR);
+
+ // Case 4: a request for non-existing statistic
+ params->set("name", Element::create("alpha"));
+ rsp = StatsMgr::instance().statisticSetMaxSampleAgeHandler("statistic-sample-age-set", params);
+ EXPECT_EQ("{ \"result\": 1, \"text\": \"No 'alpha' statistic found\" }",
+ rsp->str());
+}
+
+TEST_F(StatsMgrTest, commandSetMaxSampleAgeAll) {
+ // Set a couple of statistics
+ StatsMgr::instance().setValue("alpha", static_cast<int64_t>(1234));
+ StatsMgr::instance().setValue("beta", 12.34);
+ StatsMgr::instance().setValue("gamma", dur1234);
+ StatsMgr::instance().setValue("delta", "Lorem ipsum");
+
+ ElementPtr params = Element::createMap();
+ params->set("duration", Element::create(3765)); // set duration to 3765 seconds
+
+ ConstElementPtr rsp =
+ StatsMgr::instance().statisticSetMaxSampleAgeAllHandler(params);
+ int status_code;
+ ASSERT_NO_THROW(parseAnswer(status_code, rsp));
+ EXPECT_EQ(CONTROL_RESULT_SUCCESS, status_code);
+
+ // check defaults
+ EXPECT_EQ(StatsMgr::instance().getMaxSampleAgeDefault(), seconds(3765));
+ EXPECT_EQ(StatsMgr::instance().getMaxSampleCountDefault(), 0);
+
+ // check if time limit was set properly and whether count limit is disabled
+ EXPECT_EQ(StatsMgr::instance().getObservation("alpha")->getMaxSampleAge().first, true);
+ EXPECT_EQ(StatsMgr::instance().getObservation("alpha")->getMaxSampleAge().second,
+ dur1245);
+ EXPECT_EQ(StatsMgr::instance().getObservation("alpha")->getMaxSampleCount().first, false);
+
+ EXPECT_EQ(StatsMgr::instance().getObservation("beta")->getMaxSampleAge().first, true);
+ EXPECT_EQ(StatsMgr::instance().getObservation("beta")->getMaxSampleAge().second,
+ dur1245);
+ EXPECT_EQ(StatsMgr::instance().getObservation("beta")->getMaxSampleCount().first, false);
+
+ EXPECT_EQ(StatsMgr::instance().getObservation("gamma")->getMaxSampleAge().first, true);
+ EXPECT_EQ(StatsMgr::instance().getObservation("gamma")->getMaxSampleAge().second,
+ dur1245);
+ EXPECT_EQ(StatsMgr::instance().getObservation("gamma")->getMaxSampleCount().first, false);
+
+ EXPECT_EQ(StatsMgr::instance().getObservation("delta")->getMaxSampleAge().first, true);
+ EXPECT_EQ(StatsMgr::instance().getObservation("delta")->getMaxSampleAge().second,
+ dur1245);
+ EXPECT_EQ(StatsMgr::instance().getObservation("delta")->getMaxSampleCount().first, false);
+}
+
+// This test checks whether statistic-sample-count-set command really set
+// max_sample_count_ limit correctly.
+TEST_F(StatsMgrTest, commandSetMaxSampleCount) {
+ StatsMgr::instance().setValue("alpha", static_cast<int64_t>(1234));
+
+ ElementPtr params = Element::createMap();
+ params->set("name", Element::create("alpha"));
+ params->set("max-samples", Element::create(15));
+
+ ConstElementPtr rsp =
+ StatsMgr::instance().statisticSetMaxSampleCountHandler("statistic-sample-count-set", params);
+ int status_code;
+ ASSERT_NO_THROW(parseAnswer(status_code, rsp));
+ EXPECT_EQ(CONTROL_RESULT_SUCCESS, status_code);
+
+ // check if time limit was set properly and whether duration limit is disabled
+ EXPECT_EQ(StatsMgr::instance().getObservation("alpha")->getMaxSampleCount().first, true);
+ EXPECT_EQ(StatsMgr::instance().getObservation("alpha")->getMaxSampleCount().second, 15);
+ EXPECT_EQ(StatsMgr::instance().getObservation("alpha")->getMaxSampleAge().first, false);
+}
+
+// Test checks if statistic-sample-count-set is able to handle:
+// - a request without parameters
+// - a request without max-samples parameter
+// - a request with missing statistic name
+// - a request for non-existing statistic.
+TEST_F(StatsMgrTest, commandSetMaxSampleCountNegative) {
+ // Case 1: a request without parameters
+ ConstElementPtr rsp =
+ StatsMgr::instance().statisticSetMaxSampleCountHandler("statistic-sample-count-set", ElementPtr());
+ int status_code;
+ ASSERT_NO_THROW(parseAnswer(status_code, rsp));
+ EXPECT_EQ(status_code, CONTROL_RESULT_ERROR);
+
+ // Case 2: a request without max-samples parameter
+ ElementPtr params = Element::createMap();
+ params->set("name", Element::create("alpha"));
+ rsp = StatsMgr::instance().statisticSetMaxSampleCountHandler("statistic-sample-count-set", params);
+ ASSERT_NO_THROW(parseAnswer(status_code, rsp));
+ EXPECT_EQ(status_code, CONTROL_RESULT_ERROR);
+
+ // Case 3: a request with missing statistic name
+ params = Element::createMap();
+ params->set("max-samples", Element::create(10));
+ rsp = StatsMgr::instance().statisticSetMaxSampleCountHandler("statistic-sample-count-set", params);
+ ASSERT_NO_THROW(parseAnswer(status_code, rsp));
+ EXPECT_EQ(status_code, CONTROL_RESULT_ERROR);
+
+ // Case 4: a request for non-existing statistic
+ params->set("name", Element::create("alpha"));
+ rsp = StatsMgr::instance().statisticSetMaxSampleCountHandler("statistic-sample-count-set", params);
+ EXPECT_EQ("{ \"result\": 1, \"text\": \"No 'alpha' statistic found\" }",
+ rsp->str());
+}
+
+TEST_F(StatsMgrTest, commandSetMaxSampleCountAll) {
+ // Set a couple of statistics
+ StatsMgr::instance().setValue("alpha", static_cast<int64_t>(1234));
+ StatsMgr::instance().setValue("beta", 12.34);
+ StatsMgr::instance().setValue("gamma", dur1234);
+ StatsMgr::instance().setValue("delta", "Lorem ipsum");
+
+ ElementPtr params = Element::createMap();
+ params->set("max-samples", Element::create(200));
+
+ ConstElementPtr rsp =
+ StatsMgr::instance().statisticSetMaxSampleCountAllHandler(params);
+ int status_code;
+ ASSERT_NO_THROW(parseAnswer(status_code, rsp));
+ EXPECT_EQ(CONTROL_RESULT_SUCCESS, status_code);
+
+ // check default
+ EXPECT_EQ(StatsMgr::instance().getMaxSampleCountDefault(), 200);
+
+ // check if count limit was set properly and whether count limit is disabled
+ EXPECT_EQ(StatsMgr::instance().getObservation("alpha")->getMaxSampleCount().first, true);
+ EXPECT_EQ(StatsMgr::instance().getObservation("alpha")->getMaxSampleCount().second, 200);
+ EXPECT_EQ(StatsMgr::instance().getObservation("alpha")->getMaxSampleAge().first, false);
+
+ EXPECT_EQ(StatsMgr::instance().getObservation("beta")->getMaxSampleCount().first, true);
+ EXPECT_EQ(StatsMgr::instance().getObservation("beta")->getMaxSampleCount().second, 200);
+ EXPECT_EQ(StatsMgr::instance().getObservation("beta")->getMaxSampleAge().first, false);
+
+ EXPECT_EQ(StatsMgr::instance().getObservation("gamma")->getMaxSampleCount().first, true);
+ EXPECT_EQ(StatsMgr::instance().getObservation("gamma")->getMaxSampleCount().second, 200);
+ EXPECT_EQ(StatsMgr::instance().getObservation("gamma")->getMaxSampleAge().first, false);
+
+ EXPECT_EQ(StatsMgr::instance().getObservation("delta")->getMaxSampleCount().first, true);
+ EXPECT_EQ(StatsMgr::instance().getObservation("delta")->getMaxSampleCount().second, 200);
+ EXPECT_EQ(StatsMgr::instance().getObservation("delta")->getMaxSampleAge().first, false);
+}
+
+// Test checks if statistics-sample-count-set-all fails on zero.
+TEST_F(StatsMgrTest, commandSetMaxSampleCountAllZero) {
+ ElementPtr params = Element::createMap();
+ params->set("max-samples", Element::create(0));
+
+ ConstElementPtr rsp =
+ StatsMgr::instance().statisticSetMaxSampleCountAllHandler(params);
+ int status_code;
+ ASSERT_NO_THROW(parseAnswer(status_code, rsp));
+ EXPECT_EQ(status_code, CONTROL_RESULT_ERROR);
+}
+
+}
diff --git a/src/lib/stats/testutils/Makefile.am b/src/lib/stats/testutils/Makefile.am
new file mode 100644
index 0000000..009257f
--- /dev/null
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+ -test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
+
+maintainer-clean-generic:
+ @echo "This command is intended for maintainers to use"
+ @echo "it deletes files that may require special tools to rebuild."
+clean: clean-am
+
+clean-am: clean-generic clean-libtool mostlyclean-am
+
+distclean: distclean-am
+ -rm -f Makefile
+distclean-am: clean-am distclean-generic
+
+dvi: dvi-am
+
+dvi-am:
+
+html: html-am
+
+html-am:
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+info: info-am
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+install-data-am:
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+install-dvi: install-dvi-am
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+install-dvi-am:
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+install-exec-am:
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+install-html: install-html-am
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+install-man:
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+install-pdf: install-pdf-am
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+install-pdf-am:
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+install-ps: install-ps-am
+
+install-ps-am:
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+installcheck-am:
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+maintainer-clean: maintainer-clean-am
+ -rm -f Makefile
+maintainer-clean-am: distclean-am maintainer-clean-generic
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+mostlyclean: mostlyclean-am
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+mostlyclean-am: mostlyclean-generic mostlyclean-libtool
+
+pdf: pdf-am
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+.PHONY: all all-am check check-am clean clean-generic clean-libtool \
+ cscopelist-am ctags-am distclean distclean-generic \
+ distclean-libtool distdir dvi dvi-am html html-am info info-am \
+ install install-am install-data install-data-am install-dvi \
+ install-dvi-am install-exec install-exec-am install-html \
+ install-html-am install-info install-info-am install-man \
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+ tags-am uninstall uninstall-am
+
+.PRECIOUS: Makefile
+
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/src/lib/stats/testutils/stats_test_utils.h b/src/lib/stats/testutils/stats_test_utils.h
new file mode 100644
index 0000000..808dced
--- /dev/null
+++ b/src/lib/stats/testutils/stats_test_utils.h
@@ -0,0 +1,64 @@
+// Copyright (C) 2020-2021 Internet Systems Consortium, Inc. ("ISC")
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+#ifndef STATS_TEST_UTILS_H
+#define STATS_TEST_UTILS_H
+
+#include <cc/data.h>
+#include <stats/stats_mgr.h>
+
+#include <gtest/gtest.h>
+
+namespace isc {
+namespace stats {
+namespace test {
+
+/// @brief Type of name x value for statistics.
+typedef std::map<std::string, int64_t> StatMap;
+
+/// @brief Compares a statistic to an expected value.
+///
+/// Attempt to fetch the named statistic from the StatsMgr and if
+/// found, compare its observed value to the given value.
+/// Fails if the stat is not found or if the values do not match.
+///
+/// @param name StatsMgr name for the statistic to check.
+/// @param expected_value expected value of the statistic.
+inline void checkStat(const std::string& name, const int64_t expected_value) {
+ using namespace isc::stats;
+ ObservationPtr obs = StatsMgr::instance().getObservation(name);
+ ASSERT_TRUE(obs) << " stat: " << name << " not found ";
+ ASSERT_EQ(expected_value, obs->getInteger().first)
+ << " stat: " << name << " value wrong";
+}
+
+/// @brief Check if a statistic does not exists.
+///
+/// @param name StatsMgr name for the statistic to check.
+inline void checkNoStat(const std::string& name) {
+ using namespace isc::stats;
+ EXPECT_FALSE(StatsMgr::instance().getObservation(name));
+}
+
+/// @brief Compares StatsMgr statistics against expected values.
+///
+/// Iterates over a list of statistic names and expected values, attempting
+/// to fetch each from the StatsMgr and if found, compare its observed
+/// value to the expected value. Fails if any of the expected stats are not
+/// found or if the values do not match.
+///
+/// @param expected_stats Map of expected static names and values.
+inline void checkStats(const StatMap& expected_stats) {
+ for (const auto& it : expected_stats) {
+ checkStat(it.first, it.second);
+ }
+}
+
+}
+}
+}
+
+#endif // STATS_TEST_UTILS_H
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