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// Copyright (C) 2011-2021 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 <algorithm>
#include <vector>
#include <log/logger.h>
#include <log/logger_manager.h>
#include <log/logger_manager_impl.h>
#include <log/logger_name.h>
#include <log/logger_support.h>
#include <log/log_messages.h>
#include <log/macros.h>
#include <log/message_dictionary.h>
#include <log/message_exception.h>
#include <log/message_initializer.h>
#include <log/message_reader.h>
#include <log/message_types.h>
#include <log/interprocess/interprocess_sync_null.h>
using namespace std;
// Older log4cplus versions (1.2.0) don't have the initializer.h header that
// would allow explicit initialization. Newer versions (2.0.4 for sure, possibly
// older as well) have it and it's recommended to use it. We detect whether
// it's present or not and do explicit initialization if possible.
#ifdef LOG4CPLUS_INITIALIZER_H
#include <log4cplus/initializer.h>
namespace {
log4cplus::Initializer initializer;
}
#endif
namespace {
// Logger used for logging messages within the logging code itself.
isc::log::Logger logger("log");
// Static stores for the initialization severity and debug level.
// These are put in methods to avoid a "static initialization fiasco".
isc::log::Severity& initSeverity() {
static isc::log::Severity severity = isc::log::INFO;
return (severity);
}
int& initDebugLevel() {
static int dbglevel = 0;
return (dbglevel);
}
std::string& initRootName() {
static std::string root(isc::log::getDefaultRootLoggerName());
return (root);
}
} // Anonymous namespace
namespace isc {
namespace log {
// Constructor - create the implementation class.
LoggerManager::LoggerManager() {
impl_ = new LoggerManagerImpl();
}
// Destructor - get rid of the implementation class
LoggerManager::~LoggerManager() {
delete impl_;
}
// Initialize processing
void
LoggerManager::processInit() {
impl_->processInit();
}
// Process logging specification
void
LoggerManager::processSpecification(const LoggerSpecification& spec) {
impl_->processSpecification(spec);
}
// End Processing
void
LoggerManager::processEnd() {
impl_->processEnd();
}
/// Logging system initialization
void
LoggerManager::init(const std::string& root, isc::log::Severity severity,
int dbglevel, const char* file, bool buffer)
{
// Load in the messages declared in the program and registered by
// statically-declared MessageInitializer objects.
MessageInitializer::loadDictionary();
// Save name, severity and debug level for later. No need to save the
// file name as once the local message file is read the messages will
// not be lost.
initRootName() = root;
initSeverity() = severity;
initDebugLevel() = dbglevel;
// Create the Kea root logger and set the default severity and
// debug level. This is the logger that has the name of the application.
// All other loggers created in this application will be its children.
setRootLoggerName(root);
// Initialize the implementation logging. After this point, some basic
// logging has been set up and messages can be logged.
// However, they will not appear until a logging specification has been
// processed (or the program exits), see TODO
LoggerManagerImpl::init(severity, dbglevel, buffer);
setLoggingInitialized();
// Check if there were any duplicate message IDs in the default dictionary
// and if so, log them. Log using the logging facility logger.
logDuplicatedMessages();
// Replace any messages with local ones (if given)
if (file) {
readLocalMessageFile(file);
}
// Ensure that the mutex is constructed and ready at this point.
(void) getMutex();
}
void
LoggerManager::logDuplicatedMessages() {
const list<string>& duplicates = MessageInitializer::getDuplicates();
if (!duplicates.empty()) {
// There are duplicates present. This list itself may contain
// duplicates; if so, the message ID is listed as many times as
// there are duplicates.
for (list<string>::const_iterator i = duplicates.begin();
i != duplicates.end(); ++i) {
LOG_WARN(logger, LOG_DUPLICATE_MESSAGE_ID).arg(*i);
}
MessageInitializer::clearDuplicates();
}
}
// Read local message file
// TODO This should be done after the configuration has been read so that
// the file can be placed in the local configuration
void
LoggerManager::readLocalMessageFile(const char* file) {
const MessageDictionaryPtr& dictionary = MessageDictionary::globalDictionary();
MessageReader reader(dictionary.get());
// Turn off use of any lock files. This is because this logger can
// be used by standalone programs which may not have write access to
// the local state directory (to create lock files). So we switch to
// using a null interprocess sync object here.
logger.setInterprocessSync(
new isc::log::interprocess::InterprocessSyncNull("logger"));
try {
logger.info(LOG_READING_LOCAL_FILE).arg(file);
reader.readFile(file, MessageReader::REPLACE);
// File successfully read. As each message in the file is supposed to
// replace one in the dictionary, any ID read that can't be located in
// the dictionary will not be used. To aid problem diagnosis, the
// unknown message IDs are listed.
MessageReader::MessageIDCollection unknown = reader.getNotAdded();
for (MessageReader::MessageIDCollection::const_iterator
i = unknown.begin(); i != unknown.end(); ++i) {
string message_id = boost::lexical_cast<string>(*i);
logger.warn(LOG_NO_SUCH_MESSAGE).arg(message_id);
}
}
catch (const MessageException& e) {
MessageID ident = e.id();
vector<string> args = e.arguments();
// Log the variable number of arguments. The actual message will be
// logged when the error_message variable is destroyed.
Formatter<isc::log::Logger> error_message = logger.error(ident);
for (vector<string>::size_type i = 0; i < args.size(); ++i) {
error_message = error_message.arg(args[i]);
}
}
}
// Reset logging to settings passed to init()
void
LoggerManager::reset() {
setRootLoggerName(initRootName());
LoggerManagerImpl::reset(initSeverity(), initDebugLevel());
}
std::mutex&
LoggerManager::getMutex() {
static std::mutex mutex;
return (mutex);
}
} // namespace log
} // namespace isc
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