diff options
Diffstat (limited to 'src/lib/config_backend')
| -rw-r--r-- | src/lib/config_backend/Makefile.am | 25 | ||||
| -rw-r--r-- | src/lib/config_backend/Makefile.in | 780 | ||||
| -rw-r--r-- | src/lib/config_backend/base_config_backend.h | 87 | ||||
| -rw-r--r-- | src/lib/config_backend/base_config_backend_mgr.h | 220 | ||||
| -rw-r--r-- | src/lib/config_backend/base_config_backend_pool.h | 649 | ||||
| -rw-r--r-- | src/lib/config_backend/constants.h | 88 | ||||
| -rw-r--r-- | src/lib/config_backend/tests/Makefile.am | 38 | ||||
| -rw-r--r-- | src/lib/config_backend/tests/Makefile.in | 984 | ||||
| -rw-r--r-- | src/lib/config_backend/tests/config_backend_mgr_unittest.cc | 556 | ||||
| -rw-r--r-- | src/lib/config_backend/tests/run_unittests.cc | 19 |
10 files changed, 3446 insertions, 0 deletions
diff --git a/src/lib/config_backend/Makefile.am b/src/lib/config_backend/Makefile.am new file mode 100644 index 0000000..2b51675 --- /dev/null +++ b/src/lib/config_backend/Makefile.am @@ -0,0 +1,25 @@ +SUBDIRS = . tests + +AM_CPPFLAGS = -I$(top_srcdir)/src/lib -I$(top_builddir)/src/lib +AM_CPPFLAGS += $(BOOST_INCLUDES) + +AM_CXXFLAGS = $(KEA_CXXFLAGS) + +EXTRA_DIST = base_config_backend.h +EXTRA_DIST += base_config_backend_mgr.h +EXTRA_DIST += base_config_backend_pool.h +EXTRA_DIST += constants.h + +# The message file should be in the distribution. +#EXTRA_DIST += config_backend.dox + +CLEANFILES = *.gcno *.gcda + +# Specify the headers for copying into the installation directory tree. +libkea_cb_includedir = $(pkgincludedir)/config_backend +libkea_cb_include_HEADERS = \ + base_config_backend.h \ + base_config_backend_mgr.h \ + base_config_backend_pool.h \ + constants.h + diff --git a/src/lib/config_backend/Makefile.in b/src/lib/config_backend/Makefile.in new file mode 100644 index 0000000..00ae34e --- /dev/null +++ b/src/lib/config_backend/Makefile.in @@ -0,0 +1,780 @@ +# Makefile.in generated by automake 1.16.1 from Makefile.am. +# @configure_input@ + +# Copyright (C) 1994-2018 Free Software Foundation, Inc. + +# This Makefile.in is free software; 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a/src/lib/config_backend/base_config_backend.h b/src/lib/config_backend/base_config_backend.h new file mode 100644 index 0000000..9e38919 --- /dev/null +++ b/src/lib/config_backend/base_config_backend.h @@ -0,0 +1,87 @@ +// Copyright (C) 2018-2022 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 BASE_CONFIG_BACKEND_H +#define BASE_CONFIG_BACKEND_H + +#include <database/database_connection.h> + +#include <boost/shared_ptr.hpp> +#include <cstdint> +#include <set> +#include <string> + +namespace isc { +namespace cb { + +/// @brief Interface for Kea server specific configuration backend +/// implementations. +/// +/// Each Kea server (e.g. DHCPv4 server) needs to implement its own +/// interface to store and fetch its configuration from the databases. +/// This is because each Kea server uses a different set of +/// configuration information. This is a base interface which should +/// be implemented (and extended) by respective Kea servers to provide +/// API to store and fetch configuration information from a database. +/// Such implementation is called configuration backend. Each +/// configuration backend facilitates a single database type, e.g. MySQL +/// database. In order to support multiple database types, i.e. MySQL, +/// PostgreSQL, each Kea server will have to implement 2 separate configuration +/// backends, one for each database type. +class BaseConfigBackend { +public: + + /// @brief Virtual destructor. + virtual ~BaseConfigBackend() { } + + /// @brief Returns backend type in the textual format. + /// + /// @return Name of the storage for configurations, e.g. "mysql", + /// "postgresql" and so forth. + virtual std::string getType() const = 0; + + /// @brief Returns backend host. + /// + /// This is used by the @c BaseConfigBackendPool to select backend + /// when @c BackendSelector is specified. + /// + /// @return host on which the database is located. + virtual std::string getHost() const = 0; + + /// @brief Returns backend port number. + /// + /// This is used by the @c BaseConfigBackendPool to select backend + /// when @c BackendSelector is specified. + /// + /// @return Port number on which database service is available. + virtual uint16_t getPort() const = 0; + + /// @brief Flag which indicates if the config backend has an unusable + /// connection. + /// + /// @return true if there is at least one unusable connection, false + /// otherwise. + virtual bool isUnusable() { + return (false); + } + + /// @brief Return backend parameters. + /// + /// Returns the backend parameters. + /// + /// @return Parameters of the backend. + virtual isc::db::DatabaseConnection::ParameterMap getParameters() const { + return (isc::db::DatabaseConnection::ParameterMap()); + } +}; + +/// @brief Shared pointer to the @c BaseConfigBackend. +typedef boost::shared_ptr<BaseConfigBackend> BaseConfigBackendPtr; + +} // end of namespace isc::cb +} // end of namespace isc + +#endif // BASE_CONFIG_BACKEND_H diff --git a/src/lib/config_backend/base_config_backend_mgr.h b/src/lib/config_backend/base_config_backend_mgr.h new file mode 100644 index 0000000..92d6858 --- /dev/null +++ b/src/lib/config_backend/base_config_backend_mgr.h @@ -0,0 +1,220 @@ +// Copyright (C) 2018-2021 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 BASE_CONFIG_BACKEND_MGR_H +#define BASE_CONFIG_BACKEND_MGR_H + +#include <config_backend/base_config_backend.h> +#include <database/database_connection.h> +#include <database/backend_selector.h> +#include <exceptions/exceptions.h> +#include <boost/shared_ptr.hpp> +#include <functional> +#include <map> +#include <string> + +namespace isc { +namespace cb { + +/// @brief Base class for Configuration Backend Managers (CBM). +/// +/// Each Kea server supporting Configuration Backend feature implements +/// a "manager" class which holds information about supported and +/// configured backends and provides access to the backends. This is +/// similar to @c HostMgr and @c LeaseMgr singletons being used by the +/// DHCP servers. +/// +/// The Config Backend Managers are typically implemented as singletons +/// which can be accessed from any place within the server code. This +/// includes server configuration, data fetching during normal server +/// operation and data management, including processing of control +/// commands implemented within hooks libraries. +/// +/// The @c BaseConfigBackendMgr is a base class for all CBMs implemented +/// for respective Kea servers. It includes mechanisms to register config +/// backend factory functions and to create instances of the backends using +/// those factory functions as a result of server configuration. The mechanism +/// of factory functions registration is useful in cases when the config +/// backend is implemented within the hook library. Such hook library +/// registers factory function in its @c load function and the server +/// simply calls this function to create the instance of this backend when +/// instructed to do so via configuration. Similar mechanism exists in +/// DHCP @c HostMgr. +/// +/// Unlike @c HostMgr, the CBMs do not directly expose API to fetch and +/// manipulate the data in the database. This is done via, so called, +/// Configuration Backends Pools. See @c BaseConfigBackendPool for +/// details. The @c BaseConfigBackendMgr is provided with the pool type +/// via class template parameter. Respective CBM implementations +/// use their own pools, which provide APIs appropriate for those +/// implementations. +/// +/// @tparam ConfgBackendPoolType Type of the configuration backend pool +/// to be used by the manager. It must derive from @c BaseConfigBackendPool +/// template class. +template<typename ConfigBackendPoolType> +class BaseConfigBackendMgr { +public: + + /// @brief Pointer to the configuration backend pool. + typedef boost::shared_ptr<ConfigBackendPoolType> ConfigBackendPoolPtr; + + /// @brief Type of the backend factory function. + /// + /// Factory function returns a pointer to the instance of the configuration + /// backend created. + typedef std::function<typename ConfigBackendPoolType::ConfigBackendTypePtr + (const db::DatabaseConnection::ParameterMap&)> Factory; + + /// @brief Constructor. + BaseConfigBackendMgr() + : factories_(), pool_(new ConfigBackendPoolType()) { + } + + /// @brief Registers new backend factory function for a given backend type. + /// + /// The typical usage of this function is to make the CBM aware of a + /// configuration backend implementation. This implementation may exist + /// in a hooks library. In such case, this function should be called from + /// the @c load function in this library. When the backend is registered, + /// the server will use it when required by the configuration, i.e. a + /// user includes configuration backend of that type in the + /// "config-databases" list. + /// + /// If the backend of the given type has already been registered, perhaps + /// by another hooks library, the CBM will refuse to register another + /// backend of the same type. + /// + /// @param db_type Backend type, e.g. "mysql". + /// @param factory Pointer to the backend factory function. + /// + /// @return true if the backend has been successfully registered, false + /// if another backend of this type already exists. + bool registerBackendFactory(const std::string& db_type, + const Factory& factory) { + // Check if this backend has been already registered. + if (factories_.count(db_type)) { + return (false); + } + + // Register the new backend. + factories_.insert(std::make_pair(db_type, factory)); + return (true); + } + + /// @brief Unregisters the backend factory function for a given backend type. + /// + /// This function is used to remove the factory function and all backend instances + /// for a given backend type. Typically, it would be called when unloading the + /// a config backend hook library, and thus called by the library's @c unload + /// function. + /// + /// @param db_type Backend type, e.g. "mysql". + /// + /// @return false if no factory for the given type was unregistered, true + /// if the factory was removed. + bool unregisterBackendFactory(const std::string& db_type) { + // Look for it. + auto index = factories_.find(db_type); + + // If it's there remove it + if (index != factories_.end()) { + factories_.erase(index); + pool_->delAllBackends(db_type); + return (true); + + } + + return (false); + } + + /// @brief Create an instance of a configuration backend. + /// + /// This method uses provided @c dbaccess string representing database + /// connection information to create an instance of the database + /// backend. If the specified backend type is not supported, i.e. there + /// is no relevant factory function registered, an exception is thrown. + /// + /// @param dbaccess Database access string being a collection of + /// key=value pairs. + /// + /// @throw InvalidParameter if access string lacks database type value. + /// @throw db::InvalidType if the type of the database backend is not + /// supported. + /// @throw Unexpected if the backend factory function returned NULL. + void addBackend(const std::string& dbaccess) { + // Parse the access string into a map of parameters. + db::DatabaseConnection::ParameterMap parameters = + db::DatabaseConnection::parse(dbaccess); + + // Get the database type to locate a factory function. + db::DatabaseConnection::ParameterMap::iterator it = parameters.find("type"); + if (it == parameters.end()) { + isc_throw(InvalidParameter, "Config backend specification lacks the " + "'type' keyword"); + } + + std::string db_type = it->second; + auto index = factories_.find(db_type); + + // No match? + if (index == factories_.end()) { + isc_throw(db::InvalidType, "The type of the configuration backend: '" << + db_type << "' is not supported"); + } + + // Call the factory and push the pointer on sources. + auto backend = index->second(parameters); + if (!backend) { + isc_throw(Unexpected, "Config database " << db_type << + " factory returned NULL"); + } + + // Backend instance created successfully. + pool_->addBackend(backend); + } + + /// @brief Removes all backends from the pool. + void delAllBackends() { + pool_->delAllBackends(); + } + + /// @brief Delete a config backend manager. + /// + /// Delete the first instance of a config database manager which matches + /// specific parameters. + /// This should have the effect of closing the database connection. + /// + /// @param db_type Backend to remove. + /// @param dbaccess Database access string being a collection of + /// key=value pairs. + /// @param if_unusable Flag which indicates if the config backend should be + /// deleted only if it is unusable. + /// @return false when not removed because it is not found or because it is + /// still usable (if_unusable is true), true otherwise. + bool delBackend(const std::string& db_type, const std::string& dbaccess, + bool if_unusable) { + return (pool_->del(db_type, dbaccess, if_unusable)); + } + + /// @brief Returns underlying config backend pool. + ConfigBackendPoolPtr getPool() const { + return (pool_); + } + +protected: + + /// @brief A map holding registered backend factory functions. + std::map<std::string, Factory> factories_; + + /// @brief Pointer to the configuration backends pool. + ConfigBackendPoolPtr pool_; +}; + +} // end of namespace isc::cb +} // end of namespace isc + +#endif // BASE_CONFIG_BACKEND_MGR_H diff --git a/src/lib/config_backend/base_config_backend_pool.h b/src/lib/config_backend/base_config_backend_pool.h new file mode 100644 index 0000000..1c83677 --- /dev/null +++ b/src/lib/config_backend/base_config_backend_pool.h @@ -0,0 +1,649 @@ +// Copyright (C) 2018-2021 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 BASE_CONFIG_BACKEND_POOL_H +#define BASE_CONFIG_BACKEND_POOL_H + +#include <cc/data.h> +#include <config_backend/base_config_backend.h> +#include <database/backend_selector.h> +#include <database/database_connection.h> +#include <database/db_exceptions.h> +#include <database/server_selector.h> +#include <functional> +#include <list> +#include <string> + +namespace isc { +namespace cb { + + +/// @brief Base class for configuration backend pools. +/// +/// Each Kea server supporting databases as a configuration repository can +/// use multiple database instances simultaneously. A pool is a collection +/// of database backends used by a particular server. Different Kea servers +/// use different pools because they store and fetch different configuration +/// information. For example: DHCPv4 server stores and fetches IPv4 subnets, +/// and DHCPv6 server stores and fetches IPv6 subnets. Therefore, each pool +/// type will expose a different API calls. +/// +/// This template class is a base class for all pools used by various servers. +/// It implements mechanisms for managing multiple backends and for forwarding +/// API calls to one or many database backends depending on the selections +/// made via @c BackendSelector class. +/// +/// @tparam ConfigBackendType Type of the configuration backend. This must +/// be a class deriving from @c BaseConfigBackend class. It is a class +/// dedicated to a particular server type, e.g. DHCPv4 server, and from +/// which database specific backends derive. +template<typename ConfigBackendType> +class BaseConfigBackendPool { +public: + + /// @brief Shared pointer to the Configuration Backend used. + typedef boost::shared_ptr<ConfigBackendType> ConfigBackendTypePtr; + + /// @brief Virtual destructor. + virtual ~BaseConfigBackendPool() { } + + /// @brief Adds a backend to the pool. + /// + /// @param backend Pointer to a backend to be added. + void addBackend(ConfigBackendTypePtr backend) { + backends_.push_back(backend); + } + + /// @brief Deletes all backends from the pool. + void delAllBackends() { + backends_.clear(); + } + + /// @brief Deletes all backends of the given type from the pool. + /// + /// @param db_type Backend to remove. + void delAllBackends(const std::string& db_type) { + typename std::list<ConfigBackendTypePtr>::iterator backend = backends_.begin(); + + while (backend != backends_.end()) { + if ((*backend)->getType() == db_type) { + backend = backends_.erase(backend); + } else { + ++backend; + } + } + } + + /// @brief Deletes all backends of the given type from the pool. + /// + /// @param db_type Backend to remove. + /// @param dbaccess Database access string being a collection of + /// key=value pairs. + /// @param if_unusable Flag which indicates if the config backend should be + /// deleted only if it is unusable. + /// @return false when not removed because it is not found or because it is + /// still usable (if_unusable is true), true otherwise. + bool del(const std::string& db_type, const std::string& dbaccess, + bool if_unusable) { + isc::db::DatabaseConnection::ParameterMap parameters = + isc::db::DatabaseConnection::parse(dbaccess); + bool deleted = false; + if (if_unusable) { + deleted = true; + } + + typename std::list<ConfigBackendTypePtr>::iterator backend = backends_.begin(); + + while (backend != backends_.end()) { + if ((*backend)->getType() != db_type || (*backend)->getParameters() != parameters) { + ++backend; + } else if (if_unusable && (!(*backend)->isUnusable())) { + deleted = false; + ++backend; + } else { + backends_.erase(backend); + return (true); + } + } + return (deleted); + } + +protected: + + /// @brief Retrieve a single configuration property from the pool. + /// + /// This is common method for retrieving a single configuration property + /// from the databases. The server specific backends call this method to + /// retrieve a single object. For example, the DHCPv4 configuration backend + /// pool may use this function to implement a @c getSubnet4 method: + /// + /// @code + /// Subnet4Ptr getSubnet4(const SubnetID& subnet_id, + /// const BackendSelector& backend_selector, + /// const ServerSelector& server_selector) const { + /// Subnet4Ptr subnet; + /// getPropertyPtrConst<Subnet4Ptr, const SubnetID&> + /// (&ConfigBackendDHCPv4::getSubnet4, backend_selector, + /// server_selector, subnet, subnet_id); + /// return (subnet); + /// } + /// @endcode + /// + /// where @c ConfigBackendDHCPv4::getSubnet4 has the following signature: + /// + /// @code + /// Subnet4Ptr getSubnet4(const ServerSelector&, const SubnetID&) const; + /// @endcode + /// + /// If the backend selector is set to "unspecified", this method will iterate + /// over the existing backends and call the @c MethodPointer method on each + /// backend. It will return the first non-null (or non-zero) value returned + /// by this call. For example: if the first backend returns non-null value, + /// this value is returned via @c property argument and the calls for the + /// rest of the backends are skipped. + /// + /// @tparam PropertyType Type of the object returned by the backend call. + /// @tparam FnPtrArgs Parameter pack holding argument types of the backend + /// method to be invoked. + /// @tparam Args Parameter pack holding types of the arguments provided + /// in the call to this method. + /// + /// @param MethodPointer Pointer to the backend method to be called. + /// @param backend_selector Backend selector. + /// @param server_selector Server selector. + /// @param [out] property Reference to the shared pointer where retrieved + /// property should be assigned. + /// @param input Values to be used as input to the backend call. + /// + /// @throw db::NoSuchDatabase if no database matching the given selector + /// was found. + template<typename PropertyType, typename... FnPtrArgs, typename... Args> + void getPropertyPtrConst(PropertyType (ConfigBackendType::*MethodPointer) + (const db::ServerSelector&, FnPtrArgs...) const, + const db::BackendSelector& backend_selector, + const db::ServerSelector& server_selector, + PropertyType& property, + Args... input) const { + + // If no particular backend is selected, call each backend and return + // the first non-null (non zero) value. + if (backend_selector.amUnspecified()) { + for (auto backend : backends_) { + property = ((*backend).*MethodPointer)(server_selector, input...); + if (property) { + break; + } + } + + } else { + // Backend selected, find the one that matches selection. + auto backends = selectBackends(backend_selector); + if (!backends.empty()) { + for (auto backend : backends) { + property = ((*backend).*MethodPointer)(server_selector, input...); + if (property) { + break; + } + } + + } else { + isc_throw(db::NoSuchDatabase, "no such database found for selector: " + << backend_selector.toText()); + } + } + } + + /// @brief Retrieve a single configuration property from the backend. + /// + /// This is common method for retrieving a single configuration property + /// from the selected database without specifying the server selector. The + /// server specific backends call this method to retrieve a single object. + /// For example, the DHCPv4 configuration backend pool may use this function + /// to implement a @c getServer4 method: + /// + /// @code + /// ServerPtr getServer4(const BackendSelector& backend_selector, + /// const std::string& server_tag) const { + /// ServerPtr server; + /// getPropertyPtrConst<ServerPtr, const std::string&> + /// (&ConfigBackendDHCPv4::getServer4, backend_selector, + /// server_tag); + /// return (server); + /// } + /// @endcode + /// + /// where @c ConfigBackendDHCPv4::getServer4 has the following signature: + /// + /// @code + /// ServerPtr getServer4(const std::string&) const; + /// @endcode + /// + /// This method is used in cases when server selector is not applicable. + /// + /// @tparam PropertyType Type of the object returned by the backend call. + /// @tparam FnPtrArgs Parameter pack holding argument types of the backend + /// method to be invoked. + /// @tparam Args Parameter pack holding types of the arguments provided + /// in the call to this method. + /// + /// @param MethodPointer Pointer to the backend method to be called. + /// @param backend_selector Backend selector. + /// @param [out] property Reference to the shared pointer where retrieved + /// property should be assigned. + /// @param input Values to be used as input to the backend call. + /// + /// @throw db::NoSuchDatabase if no database matching the given selector + /// was found. + /// @throw db::AmbiguousDatabase if multiple databases matching the selector + /// were found. + template<typename PropertyType, typename... FnPtrArgs, typename... Args> + void getBackendPropertyPtrConst(PropertyType (ConfigBackendType::*MethodPointer) + (FnPtrArgs...) const, + const db::BackendSelector& backend_selector, + PropertyType& property, + Args... input) const { + auto backends = selectBackends(backend_selector); + if (backends.empty()) { + isc_throw(db::NoSuchDatabase, "no such database found for selector: " + << backend_selector.toText()); + + } else if (backends.size() > 1) { + isc_throw(db::AmbiguousDatabase, "more than one database found for " + "selector: " << backend_selector.toText()); + } + + property = ((*(*(backends.begin())).*MethodPointer)(input...)); + } + + /// @brief Retrieve multiple configuration properties from the pool. + /// + /// This is a common method for retrieving multiple configuration properties + /// from the databases. The server specific backends call this method to + /// retrieve multiple objects of the same type. For example, the DHCPv6 + /// configuration backend pool may use this function to implement a + /// @c getSubnets6 method: + /// + /// @code + /// Subnet6Collection getModifiedSubnets6(const BackendSelector& backend_selector, + /// const ServerSelector& server_selector, + /// const ptime& modification_time) const { + /// Subnet6Collection subnets; + /// getMultiplePropertiesConst<Subnet6Collection, const ptime&> + /// (&ConfigBackendDHCPv6::getSubnets6, backend_selector, server_selector, + /// subnets, modification_time); + /// return (subnets); + /// } + /// @endcode + /// + /// where @c ConfigBackendDHCPv6::getSubnets6 has the following signature: + /// + /// @code + /// Subnet6Collection getSubnets6(const ServerSelector&, const ptime&) const; + /// @endcode + /// + /// If the backend selector is set to "unspecified", this method will iterate + /// over existing backends and call the @c MethodPointer method on each + /// backend. It will return the first non-empty list returned by one of the + /// backends. + /// + /// @tparam PropertyCollectionType Type of the container into which the + /// properties are stored. + /// @tparam FnPtrArgs Parameter pack holding argument types of the backend + /// method to be invoked. + /// @tparam Args Parameter pack holding types of the arguments provided + /// in the call to this method. + /// + /// @param MethodPointer Pointer to the backend method to be called. + /// @param backend_selector Backend selector. + /// @param server_selector Server selector. + /// @param [out] properties Reference to the collection of retrieved properties. + /// @param input Values to be used as input to the backend call. + /// + /// @throw db::NoSuchDatabase if no database matching the given selector + /// was found. + template<typename PropertyCollectionType, typename... FnPtrArgs, typename... Args> + void getMultiplePropertiesConst(PropertyCollectionType (ConfigBackendType::*MethodPointer) + (const db::ServerSelector&, FnPtrArgs...) const, + const db::BackendSelector& backend_selector, + const db::ServerSelector& server_selector, + PropertyCollectionType& properties, + Args... input) const { + if (backend_selector.amUnspecified()) { + for (auto backend : backends_) { + properties = ((*backend).*MethodPointer)(server_selector, input...); + if (!properties.empty()) { + break; + } + } + + } else { + auto backends = selectBackends(backend_selector); + if (!backends.empty()) { + for (auto backend : backends) { + properties = ((*backend).*MethodPointer)(server_selector, input...); + if (!properties.empty()) { + break; + } + } + + } else { + isc_throw(db::NoSuchDatabase, "no such database found for selector: " + << backend_selector.toText()); + } + } + } + + /// @brief Retrieve all configuration properties from the pool. + /// + /// This is a common method for retrieving all configuration properties + /// from the databases. The server specific backends call this method + /// to retrieve all objects of the same type. For example, the DHCPv4 + /// configuration backend pool may use this function to implement a + /// @c getAllSubnets4 method: + /// + /// @code + /// Subnet4Collection getAllSubnets4(const BackendSelector&, const ServerSelector&) const { + /// Subnet4Collection subnets; + /// getAllPropertiesConst<Subnet6Collection> + /// (&ConfigBackendDHCPv4::getAllSubnets4, subnets, backend_selector, + /// server_selector); + /// return (subnets); + /// } + /// @endcode + /// + /// where @c ConfigBackendDHCPv4::getAllSubnets4 has the following signature: + /// + /// @code + /// Subnet4Collection getAllSubnets4(const ServerSelector&) const; + /// @endcode + /// + /// If the backend selector is set to "unspecified", this method will iterate + /// over existing backends and call the @c MethodPointer method on each + /// backend. It will return the first non-empty list returned by one of the + /// backends. + /// + /// @tparam PropertyCollectionType Type of the container into which the + /// properties are stored. + /// + /// @param MethodPointer Pointer to the backend method to be called. + /// @param backend_selector Backend selector. + /// @param server_selector Server selector. + /// @param [out] properties Reference to the collection of retrieved properties. + /// + /// @throw db::NoSuchDatabase if no database matching the given selector + /// was found. + template<typename PropertyCollectionType> + void getAllPropertiesConst(PropertyCollectionType (ConfigBackendType::*MethodPointer) + (const db::ServerSelector&) const, + const db::BackendSelector& backend_selector, + const db::ServerSelector& server_selector, + PropertyCollectionType& properties) const { + if (backend_selector.amUnspecified()) { + for (auto backend : backends_) { + properties = ((*backend).*MethodPointer)(server_selector); + if (!properties.empty()) { + break; + } + } + + } else { + auto backends = selectBackends(backend_selector); + if (!backends.empty()) { + for (auto backend : backends) { + properties = ((*backend).*MethodPointer)(server_selector); + if (!properties.empty()) { + break; + } + } + + } else { + isc_throw(db::NoSuchDatabase, "no such database found for selector: " + << backend_selector.toText()); + } + } + } + + /// @brief Get all configuration properties from the backend. + /// + /// This is a common method for retrieving all configuration properties + /// from the selected database without specifying the server selector. The + /// server specific backends call this method to retrieve all objects of + /// the same type. For example, the DHCPv4 configuration backend pool may + /// use this function to implement a @c getAllServers4 method: + /// + /// @code + /// ServerCollection getAllServers4(const BackendSelector&) const { + /// ServerCollection servers; + /// getAllBackendPropertiesConst<ServerCollection> + /// (&ConfigBackendDHCPv4::getAllServers4, backend_selector, servers); + /// return (servers); + /// } + /// @endcode + /// + /// where @c ConfigBackendDHCPv4::getAllServers4 has the following signature: + /// + /// @code + /// ServerCollection getAllServers4() const; + /// @endcode + /// + /// This method is used in cases when server selector is not applicable. + /// + /// @tparam PropertyCollectionType Type of the container into which the + /// properties are stored. + /// + /// @param MethodPointer Pointer to the backend method to be called. + /// @param backend_selector Backend selector. + /// @param [out] properties Reference to the collection of retrieved properties. + /// + /// @throw db::NoSuchDatabase if no database matching the given selector + /// was found. + /// @throw db::AmbiguousDatabase if multiple databases matching the selector + /// were found. + template<typename PropertyCollectionType> + void getAllBackendPropertiesConst(PropertyCollectionType (ConfigBackendType::*MethodPointer)() const, + const db::BackendSelector& backend_selector, + PropertyCollectionType& properties) const { + auto backends = selectBackends(backend_selector); + if (backends.empty()) { + isc_throw(db::NoSuchDatabase, "no such database found for selector: " + << backend_selector.toText()); + + } else if (backends.size() > 1) { + isc_throw(db::AmbiguousDatabase, "more than one database found for " + "selector: " << backend_selector.toText()); + } + + properties = (*(*(backends.begin())).*MethodPointer)(); + } + + /// @brief Add, update or delete property from the backend. + /// + /// This is a common method for storing a single configuration property in + /// a database, updating an existing property or deleting the property. + /// The server specific backends call this method. For example, + /// the DHCPv6 configuration backend pool may use this function to implement + /// a @c createUpdateSubnet6 method: + /// + /// @code + /// void createUpdateSubnet6(const Subnet6Ptr& subnet, + /// const BackendSelector& backend_selector, + /// const ServerSelector& server_selector) { + /// createUpdateDeleteProperty<void, const Subnet6Ptr&> + /// (&ConfigBackendDHCPv6::createUpdateSubnet6, backend_selector, + /// server_selector, subnet, selector); + /// } + /// @endcode + /// + /// where @c ConfigBackendDHCPv6::createUpdateSubnet6 has the following + /// signature: + /// + /// @code + /// void createUpdateSubnet6(const ServerSelector&, const Subnet6Ptr&); + /// @endcode + /// + /// The backend selector must point to exactly one backend. If more than one + /// backend is selected, an exception is thrown. If no backend is selected + /// an exception is thrown either. + /// + /// @tparam ReturnValue Returned value, typically void or uint64_t. + /// @tparam FnPtrArgs Parameter pack holding argument types of the backend + /// method to be invoked. + /// @tparam Args Parameter pack holding types of the arguments provided + /// in the call to this method. + /// + /// @param MethodPointer Pointer to the backend method to be called. + /// @param backend_selector Backend selector. + /// @param server_selector Server selector. + /// @param input Objects used as arguments to the backend method to be + /// called. + /// + /// @throw db::NoSuchDatabase if no database matching the given selector + /// was found. + /// @throw db::AmbiguousDatabase if multiple databases matching the selector + /// were found. + /// @return Number of affected properties, if the value is non void. + template<typename ReturnValue, typename... FnPtrArgs, typename... Args> + ReturnValue createUpdateDeleteProperty(ReturnValue (ConfigBackendType::*MethodPointer) + (const db::ServerSelector&, FnPtrArgs...), + const db::BackendSelector& backend_selector, + const db::ServerSelector& server_selector, + Args... input) { + auto backends = selectBackends(backend_selector); + if (backends.empty()) { + isc_throw(db::NoSuchDatabase, "no such database found for selector: " + << backend_selector.toText()); + + } else if (backends.size() > 1) { + isc_throw(db::AmbiguousDatabase, "more than one database found for " + "selector: " << backend_selector.toText()); + } + + return ((*(*(backends.begin())).*MethodPointer)(server_selector, input...)); + } + + /// @brief Add, update or delete property from the backend. + /// + /// This is a common method for storing a single configuration property in + /// a database, updating an existing property or deleting the property + /// without specifying the server selector. The server specific backends + /// call this method. For example, the DHCPv4 configuration backend pool + /// may use this function to implement the @c createUpdateServer4 method: + /// + /// @code + /// void createUpdateServer4(const BackendSelector& backend_selector, + /// const ServerSelector& server_selector, + /// const ServerPtr& server) { + /// createUpdateDeleteBackendProperty<void, const ServerPtr&> + /// (&ConfigBackendDHCPv4::createUpdateServer4, backend_selector, + /// server); + /// } + /// @endcode + /// + /// where @c ConfigBackendDHCPv4::createUpdateServer4 has the following + /// signature: + /// + /// @code + /// void createUpdateServer4(const ServerPtr&); + /// @endcode + /// + /// This method is used in cases when server selector is not applicable. + /// + /// @tparam ReturnValue Returned value, typically void or uint64_t. + /// @tparam FnPtrArgs Parameter pack holding argument types of the backend + /// method to be invoked. + /// @tparam Args Parameter pack holding types of the arguments provided + /// in the call to this method. + /// + /// @param MethodPointer Pointer to the backend method to be called. + /// @param backend_selector Backend selector. + /// @param input Objects used as arguments to the backend method to be + /// called. + /// + /// @throw db::NoSuchDatabase if no database matching the given selector + /// was found. + /// @throw db::AmbiguousDatabase if multiple databases matching the selector + /// were found. + /// @return Number of affected properties, if the value is non void. + template<typename ReturnValue, typename... FnPtrArgs, typename... Args> + ReturnValue createUpdateDeleteBackendProperty(ReturnValue (ConfigBackendType::*MethodPointer) + (FnPtrArgs...), + const db::BackendSelector& backend_selector, + Args... input) { + auto backends = selectBackends(backend_selector); + if (backends.empty()) { + isc_throw(db::NoSuchDatabase, "no such database found for selector: " + << backend_selector.toText()); + + } else if (backends.size() > 1) { + isc_throw(db::AmbiguousDatabase, "more than one database found for " + "selector: " << backend_selector.toText()); + } + + return ((*(*(backends.begin())).*MethodPointer)(input...)); + } + + /// @brief Selects existing backends matching the selector. + /// + /// This method selects backends matching the selector. If the selector is + /// "unspecified" or there is no backend in the pool, an empty list is returned. + /// + /// @param backend_selector Selector for which matching backends should be selected. + std::list<ConfigBackendTypePtr> + selectBackends(const db::BackendSelector& backend_selector) const { + + std::list<ConfigBackendTypePtr> selected; + + // In case there is only one backend and the caller hasn't specified + // any particular backend, simply return it. + if ((backends_.size() == 1) && backend_selector.amUnspecified()) { + selected.push_back(*backends_.begin()); + return (selected); + } + + // For other cases we return empty list. + if (backends_.empty() || backend_selector.amUnspecified()) { + return (selected); + } + + // Go over all backends. + for (auto backend : backends_) { + // If backend type is specified and it is not matching, + // do not select this backend. + if ((backend_selector.getBackendType() != db::BackendSelector::Type::UNSPEC) && + (backend_selector.getBackendType() != + db::BackendSelector::stringToBackendType(backend->getType()))) { + continue; + } + + // If the host has been specified by the backend's host is not + // matching, do not select this backend. + if ((!backend_selector.getBackendHost().empty()) && + (backend_selector.getBackendHost() != backend->getHost())) { + continue; + } + + // If the port has been specified by the backend's port is not + // matching, do not select this backend. + if ((backend_selector.getBackendPort() != 0) && + (backend_selector.getBackendPort() != backend->getPort())) { + continue; + } + + // Passed all checks, so the backend is matching. Add it to the list. + selected.push_back(backend); + } + + return (selected); + } + + /// @brief Holds configuration backends belonging to the pool. + std::list<ConfigBackendTypePtr> backends_; +}; + +} // end of namespace isc::cb +} // end of namespace isc + +#endif // BASE_CONFIG_BACKEND_POOL_H diff --git a/src/lib/config_backend/constants.h b/src/lib/config_backend/constants.h new file mode 100644 index 0000000..ba20b78 --- /dev/null +++ b/src/lib/config_backend/constants.h @@ -0,0 +1,88 @@ +// Copyright (C) 2018-2021 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 CONFIG_BACKEND_CONSTANTS_H +#define CONFIG_BACKEND_CONSTANTS_H + +namespace isc { +namespace cb { + +/// @name Constants specifying output buffer lengths. +/// +/// Config backends create buffers of these sizes to store +/// fetched variable length data in them. +/// +//@{ +constexpr unsigned long SUBNET4_PREFIX_BUF_LENGTH = 32; + +constexpr unsigned long SUBNET6_PREFIX_BUF_LENGTH = 64; + +constexpr unsigned long POOL_ADDRESS6_BUF_LENGTH = 45; + +constexpr unsigned long DHCP4O6_INTERFACE_BUF_LENGTH = 128; + +constexpr unsigned long DHCP4O6_INTERFACE_ID_BUF_LENGTH = 128; + +constexpr unsigned long DHCP4O6_SUBNET_BUF_LENGTH = 64; + +constexpr unsigned long BOOT_FILE_NAME_BUF_LENGTH = 512; + +constexpr unsigned long CLIENT_CLASS_BUF_LENGTH = 128; + +constexpr unsigned long INTERFACE_BUF_LENGTH = 128; + +constexpr unsigned long INTERFACE_ID_BUF_LENGTH = 128; + +constexpr unsigned long RELAY_BUF_LENGTH = 65536; + +constexpr unsigned long REQUIRE_CLIENT_CLASSES_BUF_LENGTH = 65536; + +constexpr unsigned long SERVER_HOSTNAME_BUF_LENGTH = 512; + +constexpr unsigned long SHARED_NETWORK_NAME_BUF_LENGTH = 128; + +constexpr unsigned long USER_CONTEXT_BUF_LENGTH = 65536; + +constexpr unsigned long OPTION_VALUE_BUF_LENGTH = 65536; + +constexpr unsigned long FORMATTED_OPTION_VALUE_BUF_LENGTH = 8192; + +constexpr unsigned long OPTION_SPACE_BUF_LENGTH = 128; + +constexpr unsigned long OPTION_NAME_BUF_LENGTH = 128; + +constexpr unsigned long OPTION_ENCAPSULATE_BUF_LENGTH = 128; + +constexpr unsigned long OPTION_RECORD_TYPES_BUF_LENGTH = 512; + +constexpr unsigned long GLOBAL_PARAMETER_NAME_BUF_LENGTH = 128; + +constexpr unsigned long GLOBAL_PARAMETER_VALUE_BUF_LENGTH = 65536; + +constexpr unsigned long CLIENT_CLASS_NAME_BUF_LENGTH = 128; + +constexpr unsigned long CLIENT_CLASS_TEST_BUF_LENGTH = 2048; + +constexpr unsigned long CLIENT_CLASS_SNAME_BUF_LENGTH = 128; + +constexpr unsigned long CLIENT_CLASS_FILENAME_BUF_LENGTH = 512; + +constexpr unsigned long AUDIT_ENTRY_OBJECT_TYPE_BUF_LENGTH = 256; + +constexpr unsigned long AUDIT_ENTRY_LOG_MESSAGE_BUF_LENGTH = 65536; + +constexpr unsigned long SERVER_TAG_BUF_LENGTH = 64; + +constexpr unsigned long SERVER_DESCRIPTION_BUF_LENGTH = 65536; + +constexpr unsigned long DNS_NAME_BUF_LENGTH = 255; + +//*} + +} // end of namespace isc::cb +} // end of namespace isc + +#endif diff --git a/src/lib/config_backend/tests/Makefile.am b/src/lib/config_backend/tests/Makefile.am new file mode 100644 index 0000000..9e254b5 --- /dev/null +++ b/src/lib/config_backend/tests/Makefile.am @@ -0,0 +1,38 @@ +SUBDIRS = . + +AM_CPPFLAGS = -I$(top_builddir)/src/lib -I$(top_srcdir)/src/lib +AM_CPPFLAGS += $(BOOST_INCLUDES) +AM_CPPFLAGS += -DTEST_DATA_BUILDDIR=\"$(abs_top_builddir)/src/lib/config/tests\" + +AM_CXXFLAGS = $(KEA_CXXFLAGS) + +if USE_STATIC_LINK +AM_LDFLAGS = -static +endif + +CLEANFILES = *.gcno *.gcda + +TESTS_ENVIRONMENT = \ + $(LIBTOOL) --mode=execute $(VALGRIND_COMMAND) + +TESTS = +if HAVE_GTEST +TESTS += libcb_unittests + +libcb_unittests_SOURCES = config_backend_mgr_unittest.cc +libcb_unittests_SOURCES += run_unittests.cc + +libcb_unittests_CPPFLAGS = $(AM_CPPFLAGS) $(GTEST_INCLUDES) +libcb_unittests_LDFLAGS = $(AM_LDFLAGS) $(GTEST_LDFLAGS) + +libcb_unittests_LDADD = $(top_builddir)/src/lib/database/libkea-database.la +libcb_unittests_LDADD += $(top_builddir)/src/lib/cc/libkea-cc.la +libcb_unittests_LDADD += $(top_builddir)/src/lib/asiolink/libkea-asiolink.la +libcb_unittests_LDADD += $(top_builddir)/src/lib/log/libkea-log.la +libcb_unittests_LDADD += $(top_builddir)/src/lib/util/libkea-util.la +libcb_unittests_LDADD += $(top_builddir)/src/lib/exceptions/libkea-exceptions.la +libcb_unittests_LDADD += $(LOG4CPLUS_LIBS) $(BOOST_LIBS) $(GTEST_LDADD) + +endif + +noinst_PROGRAMS = $(TESTS) diff --git a/src/lib/config_backend/tests/Makefile.in b/src/lib/config_backend/tests/Makefile.in new file mode 100644 index 0000000..be511b2 --- /dev/null +++ b/src/lib/config_backend/tests/Makefile.in @@ -0,0 +1,984 @@ +# Makefile.in generated by automake 1.16.1 from Makefile.am. +# @configure_input@ + +# Copyright (C) 1994-2018 Free Software Foundation, Inc. + +# This Makefile.in is free software; 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maintainer-clean \ + maintainer-clean-generic mostlyclean mostlyclean-compile \ + mostlyclean-generic mostlyclean-libtool pdf pdf-am ps ps-am \ + tags 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/config_backend/tests/config_backend_mgr_unittest.cc b/src/lib/config_backend/tests/config_backend_mgr_unittest.cc new file mode 100644 index 0000000..0ccc88d --- /dev/null +++ b/src/lib/config_backend/tests/config_backend_mgr_unittest.cc @@ -0,0 +1,556 @@ +// Copyright (C) 2018-2022 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 <config_backend/base_config_backend_mgr.h> +#include <config_backend/base_config_backend_pool.h> +#include <config_backend/base_config_backend.h> +#include <database/database_connection.h> +#include <boost/shared_ptr.hpp> +#include <gtest/gtest.h> +#include <list> +#include <string> +#include <utility> + +using namespace isc; +using namespace isc::cb; +using namespace isc::db; + +namespace { + +/// @brief Defines list of properties retrieved by @c TestConfigBackend. +/// +/// A single property is a name/value pair, where value is an integer. +typedef std::list<std::pair<std::string, int> > PropertiesList; + +/// @brief Implements configuration backend used in tests. +/// +/// @c BaseConfigBackend is an abstract class that must be implemented +/// in order to allow us to test mechanisms implemented in +/// @c BaseConfigBackendMgr and @c BaseConfigBackendPool. +/// +/// Normally, a class derived directly from the @c BaseConfigBackend +/// will merely provide an interface for server specific operations, +/// e.g. DHCPv4 specific operations, and the database specific classes +/// will implement this interface. However, for the test purposes it +/// is convenient to implement them here and let the derivations +/// only provide the implementations of the @c getType, @c getHost +/// and @c getPort functions. That way, the logic for adding and +/// retrieving the data from the backend is implemented only once and +/// is common accross all test backends. +/// +/// This class provides a logic for managing test data being a collection +/// of name/value pairs, i.e. "properties". It contains a list of +/// properties and the functions for adding the properties, retrieving +/// a single property and retrieving a collection of properties. +class TestConfigBackend : public BaseConfigBackend { +public: + + /// @brief Retrieves first property having a given name. + /// + /// @param property_name Name of the property to be retrieved. + /// @return Value of the property or 0 if property doesn't exist. + virtual int getProperty(const ServerSelector&, + const std::string& property_name) const { + for (auto property : properties_) { + if (property.first == property_name) { + return (property.second); + } + } + return (0); + } + + /// @brief Retrieves first property matching the name and value. + /// + /// @param property_name Name of the property to be retrieved. + /// @param property_value Value of the property to be retrieved. + /// @return Value of the property or 0 if the property doesn't exist. + virtual int getProperty(const ServerSelector&, + const std::string& property_name, + const int property_value) const { + for (auto property : properties_) { + if ((property.first == property_name) && + (property.second == property_value)) { + return (property.second); + } + } + return (0); + } + + /// @brief Retrieves all properties having a given name. + /// + /// @param property_name Name of the properties to be retrieved. + /// @return List of the properties having a given name. This list is + /// empty if no property was found. + virtual PropertiesList getProperties(const ServerSelector&, + const std::string& property_name) const { + PropertiesList properties; + for (auto property : properties_) { + if (property.first == property_name) { + properties.push_back(property); + } + } + return (properties); + } + + /// @brief Retrieves all properties. + /// + /// @return List of all properties held in the backend. + virtual PropertiesList getAllProperties(const ServerSelector&) const { + return (properties_); + } + + /// @brief Creates new property. + /// + /// @param new_property Property to be added to the backend. + virtual void createProperty(const ServerSelector&, + const std::pair<std::string, int>& new_property) { + properties_.push_back(new_property); + } + +protected: + + /// @brief Holds list of properties (simulates database). + PropertiesList properties_; + +}; + +/// @brief Shared pointer to the @c TestConfigBackend. +typedef boost::shared_ptr<TestConfigBackend> TestConfigBackendPtr; + +/// @brief First implementation of the test config backend. +/// +/// It simulates being a MySQL backend installed on the +/// "mysql-host" host and running on port 2345. +class TestConfigBackendImpl1 : public TestConfigBackend { +public: + + /// @brief Returns backend type. + /// + /// @return "mysql". + virtual std::string getType() const { + return (std::string("mysql")); + } + + /// @brief Returns backend host. + /// + /// @return "mysql-host". + virtual std::string getHost() const { + return (std::string("mysql-host")); + } + + /// @brief Returns backend port. + /// + /// @return Port number 2345. + virtual uint16_t getPort() const { + return (2345); + } + +}; + +/// @brief Shared pointer to the @c TestConfigBackendImpl1. +typedef boost::shared_ptr<TestConfigBackendImpl1> TestConfigBackendImpl1Ptr; + +/// @brief Second implementation of the test config backend. +/// +/// It simulates being a Postgres backend installed on the +/// "postgresql-host" host and running on port 1234. +class TestConfigBackendImpl2 : public TestConfigBackend { +public: + + /// @brief Returns backend type. + /// + /// @return "postgresql". + virtual std::string getType() const { + return (std::string("postgresql")); + } + + /// @brief Returns backend host. + /// + /// @return "postgresql-host". + virtual std::string getHost() const { + return (std::string("postgresql-host")); + } + + /// @brief Returns backend port. + /// + /// @return Port number 1234. + virtual uint16_t getPort() const { + return (1234); + } +}; + +/// @brief Shared pointer to the @c TestConfigBackendImpl2. +typedef boost::shared_ptr<TestConfigBackendImpl2> TestConfigBackendImpl2Ptr; + +/// @brief Implements test pool of configuration backends. +/// +/// @c BaseConfigBackendPool template provides mechanics for managing the data +/// stored in multiple backends. Server specific pools must extend this class +/// with methods for managing the data appropriate for the server types. +/// This class provides an example pool implementation for managing the +/// "properties" being name/value pairs. It extends the base class with +/// new methods to retrieve a single property and multiple properties. It +/// also adds a method to create new property. Those methods correspond to +/// the ones implemented in the @c TestConfigBackend, but also each of +/// them includes a "database selector" used to indicate the backend to +/// be used. +class TestConfigBackendPool : public BaseConfigBackendPool<TestConfigBackend> { +public: + + /// @brief Retrieves a value of the property. + /// + /// @param property_name Name of the property which value should be returned. + /// @param backend_selector Backend selector. The default value of the selector + /// is @c UNSPEC which means that the property will be searched in all backends + /// and the first value found will be returned. + /// @param server_selector Server selector. The default value is set to @c ALL, + /// which means that the property for all servers will be returned. + virtual int getProperty(const std::string& property_name, + const BackendSelector& backend_selector = + BackendSelector::UNSPEC(), + const ServerSelector& server_selector = + ServerSelector::ALL()) const { + int property; + + // If the selector is specified, this method will pick the appropriate + // backend and will call getProperty method on this backend. If the + // selector is not specified, this method will iterate over existing + // backends and call getProperty on them. It will return after finding + // the first non-zero value of the property. For example, if the first + // backend contains a non-zero value this value will be returned and + // the value held in the second backend (if any) won't be fetched. + // The template arguments specify the returned value type and the + // argument of the getProperty method. + getPropertyPtrConst<int, const std::string&> + (&TestConfigBackend::getProperty, backend_selector, server_selector, + property, property_name); + return (property); + } + + /// @brief Retrieves value of the property. + /// + /// @param property_name Name of the property which value should be returned. + /// @param property_value Value of the property to be retrieved. + /// @param backend_selector Backend selector. The default value of the selector + /// is @c UNSPEC which means that the property will be searched in all backends + /// and the first value found will be returned. + /// @param server_selector Server selector. The default value is set to @c ALL, + /// which means that the property for all servers will be returned. + virtual int getProperty(const std::string& property_name, + const int property_value, + const BackendSelector& backend_selector = + BackendSelector::UNSPEC(), + const ServerSelector& server_selector = + ServerSelector::ALL()) const { + int property; + getPropertyPtrConst<int, const std::string&, int> + (&TestConfigBackend::getProperty, backend_selector, server_selector, + property, property_name, property_value); + return (property); + } + + + /// @brief Retrieves multiple properties. + /// + /// @param property_name Name of the properties which should be retrieved. + /// @param backend_selector Backend selector. The default value of the selector + /// is @c UNSPEC which means that the properties will be searched in all + /// backends and the first non-empty list will be returned. + /// @param server_selector Server selector. The default value is set to @c ALL, + /// which means that the properties for all servers will be returned. + virtual PropertiesList getProperties(const std::string& property_name, + const BackendSelector& backend_selector = + BackendSelector::UNSPEC(), + const ServerSelector& server_selector = + ServerSelector::ALL()) const { + PropertiesList properties; + + // If the selector is specified, this method will pick the appropriate + // backend and will call getProperties method on this backend. If the + // selector is not specified, this method will iterate over existing + // backends and call getProperties on them. It will return after finding + // the first non-empty list of properties in one of the backends. + // The template arguments specify the type of the list of properties + // and the argument of the getProperties method. + getMultiplePropertiesConst<PropertiesList, const std::string&> + (&TestConfigBackend::getProperties, backend_selector, server_selector, + properties, property_name); + return (properties); + } + + /// @brief Retrieves all properties. + /// + /// @param backend_selector Backend selector. The default value of the selector + /// is @c UNSPEC which means that the properties will be searched in all + /// backends and the first non-empty list will be returned. + /// @param server_selector Server selector. The default value is set to @c ALL, + /// which means that the properties for all servers will be returned. + virtual PropertiesList getAllProperties(const BackendSelector& backend_selector = + BackendSelector::UNSPEC(), + const ServerSelector& server_selector = + ServerSelector::ALL()) const { + PropertiesList properties; + + // This method is similar to getMultiplePropertiesConst but it lacks + // an argument and it simply returns all properties. + getAllPropertiesConst<PropertiesList> + (&TestConfigBackend::getAllProperties, backend_selector, server_selector, + properties); + return (properties); + } + + /// @brief Creates new property in a selected backend. + /// + /// @param new_property New property to be added to a backend. + /// @param backend_selector Backend selector. It has no default value. + /// @param server_selector The default value is @c ALL which means that + /// new property is going to be shared by all servers. + virtual void createProperty(const std::pair<std::string, int>& new_property, + const BackendSelector& backend_selector, + const ServerSelector& server_selector = + ServerSelector::ALL()) { + createUpdateDeleteProperty<void, const std::pair<std::string, int>&> + (&TestConfigBackend::createProperty, backend_selector, server_selector, + new_property); + } +}; + +using TestConfigBackendMgr = BaseConfigBackendMgr<TestConfigBackendPool>; + +/// @brief Test fixture class for testing @c ConfigBackendMgr. +class ConfigBackendMgrTest : public ::testing::Test { +public: + + /// @brief Constructor. + ConfigBackendMgrTest() + : config_mgr_() { + } + + /// @brief Destructor. + /// + /// Removes backend instances. + ~ConfigBackendMgrTest() { + config_mgr_.delAllBackends(); + } + + /// @brief Creates example database backend called "mysql". + /// + /// It uses @c TestConfigBackendImpl1. + void addTestMySQLBackend() { + config_mgr_.registerBackendFactory("mysql", [](const DatabaseConnection::ParameterMap&) + -> TestConfigBackendPtr { + return (TestConfigBackendImpl1Ptr(new TestConfigBackendImpl1())); + }); + + config_mgr_.addBackend("type=mysql"); + } + + /// @brief Creates example database backend called "postgresql". + /// + /// It uses @c TestConfigBackendImpl2. + void addTestPgSQLBackend() { + config_mgr_.registerBackendFactory("postgresql", [](const DatabaseConnection::ParameterMap&) + -> TestConfigBackendPtr { + return (TestConfigBackendImpl2Ptr(new TestConfigBackendImpl2())); + }); + + // Actually create the backends. + config_mgr_.addBackend("type=postgresql"); + } + + /// @brief Creates two example database backends called "mysql" and "postgresql". + /// + /// It uses @c TestConfigBackendImpl1 and @c TestConfigBackendImpl2. + void addTestBackends() { + addTestMySQLBackend(); + addTestPgSQLBackend(); + } + + /// @brief Adds test data into the backends. + void addTestData() { + // Add two properties with different names into the first backend. + config_mgr_.getPool()->createProperty(std::make_pair("dogs", 1), + BackendSelector(BackendSelector::Type::MYSQL)); + config_mgr_.getPool()->createProperty(std::make_pair("wolves", 3), + BackendSelector(BackendSelector::Type::MYSQL)); + + // Add two properties into the second backend. Both properties share the + // name so as we can test retrieving multiple records from the same backend. + config_mgr_.getPool()->createProperty(std::make_pair("cats", 2), + BackendSelector(BackendSelector::Type::POSTGRESQL)); + config_mgr_.getPool()->createProperty(std::make_pair("cats", 4), + BackendSelector(BackendSelector::Type::POSTGRESQL)); + } + + /// Instance of the test configuration manager. + TestConfigBackendMgr config_mgr_; +}; + +// Test that selector can be left "unspecified" if there is only one backend, +// when manipulating the data. +TEST_F(ConfigBackendMgrTest, createPropertySingleBackendUnspec) { + addTestMySQLBackend(); + + ASSERT_NO_THROW( + config_mgr_.getPool()->createProperty(std::make_pair("dogs", 1), + BackendSelector(BackendSelector::Type::UNSPEC)) + ); + + // We should be able to retrieve stored value without having to specify + // the backend. + EXPECT_EQ(1, config_mgr_.getPool()->getProperty("dogs")); +} + +// Test that selector must be specified if there is more than one backend, +// when manipulating the data. +TEST_F(ConfigBackendMgrTest, createPropertyTwoBackendsUnspec) { + addTestBackends(); + + // Backend must be selected if there is more than one backend present. + EXPECT_THROW( + config_mgr_.getPool()->createProperty(std::make_pair("dogs", 1), + BackendSelector(BackendSelector::Type::UNSPEC)), + NoSuchDatabase + ); +} + +// Test that exception is thrown when multiple backends are selected. +TEST_F(ConfigBackendMgrTest, createPropertyAmbiguousSelection) { + addTestBackends(); + + // Add another MySQL backend to cause the selection to give ambiguous + // result. + config_mgr_.addBackend("type=mysql"); + + EXPECT_THROW( + config_mgr_.getPool()->createProperty(std::make_pair("dogs", 1), + BackendSelector(BackendSelector::Type::MYSQL)), + AmbiguousDatabase + ); +} + +// Test that a single property can be retrieved from a selected backend. +TEST_F(ConfigBackendMgrTest, getSingleProperty) { + + addTestBackends(); + addTestData(); + + // Backend is not specified, so it should find the dogs in first one and + // cats in the second one. + EXPECT_EQ(1, config_mgr_.getPool()->getProperty("dogs")); + EXPECT_EQ(2, config_mgr_.getPool()->getProperty("cats")); + + // No dogs in the postgresql backend and no cats in mysql backend. + EXPECT_EQ(0, config_mgr_.getPool()->getProperty("dogs", + BackendSelector(BackendSelector::Type::POSTGRESQL))); + EXPECT_EQ(0, config_mgr_.getPool()->getProperty("cats", + BackendSelector(BackendSelector::Type::MYSQL))); + + // If the selectors are pointing to the right databases, the dogs and cats + // should be returned properly. + EXPECT_EQ(1, config_mgr_.getPool()->getProperty("dogs", + BackendSelector(BackendSelector::Type::MYSQL))); + EXPECT_EQ(2, config_mgr_.getPool()->getProperty("cats", + BackendSelector(BackendSelector::Type::POSTGRESQL))); + + // Also make sure that the variant of getProperty function taking two arguments + // would return the value. + EXPECT_EQ(1, config_mgr_.getPool()->getProperty("dogs", 1, + BackendSelector(BackendSelector::Type::MYSQL))); + + // If the value is not matching it should return 0. + EXPECT_EQ(0, config_mgr_.getPool()->getProperty("dogs", 2, + BackendSelector(BackendSelector::Type::MYSQL))); + + // Try to use the backend that is not present. + EXPECT_THROW(config_mgr_.getPool()->getProperty("cats", + BackendSelector(static_cast<BackendSelector::Type>(-1))), + NoSuchDatabase); +} + +// Test that multiple properties can be retrieved with filtering. +TEST_F(ConfigBackendMgrTest, getMultipleProperties) { + + addTestBackends(); + addTestData(); + + // There is one dogs entry in mysql. + PropertiesList mysql_list = + config_mgr_.getPool()->getProperties("dogs", + BackendSelector(BackendSelector::Type::MYSQL)); + ASSERT_EQ(1, mysql_list.size()); + + // There is also one wolves entry in mysql. + mysql_list = config_mgr_.getPool()->getProperties("wolves", + BackendSelector(BackendSelector::Type::MYSQL)); + ASSERT_EQ(1, mysql_list.size()); + + // There are two cats entries in postgresql. + PropertiesList postgresql_list = + config_mgr_.getPool()->getProperties("cats", + BackendSelector(BackendSelector::Type::POSTGRESQL)); + ASSERT_EQ(2, postgresql_list.size()); + + // Try to use the backend that is not present. + EXPECT_THROW(config_mgr_.getPool()->getProperties("cats", + BackendSelector(static_cast<BackendSelector::Type>(-1))), + NoSuchDatabase); + +} + +// Test that all properties can be retrieved from each backend. +TEST_F(ConfigBackendMgrTest, getAllProperties) { + + addTestBackends(); + addTestData(); + + // The mysql backend holds two entries. + PropertiesList mysql_list = + config_mgr_.getPool()->getAllProperties(BackendSelector(BackendSelector::Type::MYSQL)); + ASSERT_EQ(2, mysql_list.size()); + + // The postgresql backends also holds two entries. + PropertiesList postgresql_list = + config_mgr_.getPool()->getAllProperties(BackendSelector(BackendSelector::Type::POSTGRESQL)); + ASSERT_EQ(2, postgresql_list.size()); + + // Try to use the backend that is not present. + EXPECT_THROW(config_mgr_.getPool()->getProperties("cats", + BackendSelector(static_cast<BackendSelector::Type>(-1))), + NoSuchDatabase); +} + +// Verify that unregistering a factory works. +TEST_F(ConfigBackendMgrTest, unregister) { + + // Verify we can't remove what is not there. + ASSERT_FALSE(config_mgr_.unregisterBackendFactory("mysql")); + + // Add both MySQL and Postgresql backends + addTestBackends(); + + // Backend should be present. + EXPECT_NO_THROW(config_mgr_.getPool()->getProperties("cats", + BackendSelector(BackendSelector::Type::MYSQL))); + + // Verify that unregistering MySQL factory returns true. + ASSERT_TRUE(config_mgr_.unregisterBackendFactory("mysql")); + + // Verify that the factory is actually gone. + ASSERT_THROW(config_mgr_.addBackend("type=mysql"), db::InvalidType); + + // Verify we can't remove what is not there. + ASSERT_FALSE(config_mgr_.unregisterBackendFactory("mysql")); + + // Try to use the backend that is not present. + EXPECT_THROW(config_mgr_.getPool()->getProperties("cats", + BackendSelector(BackendSelector::Type::MYSQL)), + NoSuchDatabase); +} + +} diff --git a/src/lib/config_backend/tests/run_unittests.cc b/src/lib/config_backend/tests/run_unittests.cc new file mode 100644 index 0000000..6754d66 --- /dev/null +++ b/src/lib/config_backend/tests/run_unittests.cc @@ -0,0 +1,19 @@ +// Copyright (C) 2018 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 <log/logger_support.h> +#include <gtest/gtest.h> + +int +main(int argc, char* argv[]) { + ::testing::InitGoogleTest(&argc, argv); + + int result = RUN_ALL_TESTS(); + + return (result); +} |