我一直在为 boost log 苦苦挣扎-我将他们的简单示例写入日志文件（http://boost-log.sourceforge.net/libs/log/example/doc/tutorial_file.cpp）。但是，当我尝试将该代码复制到“记录器”类中时，我无法将其写入日志文件。我可以看到文件default.log已创建，但其中没有任何内容。
我在Debian 7 64位。一切编译良好 - 编译行是：
g++ -o build/Logger.o -c -std=c++11 -Wall -g -O0 -DBOOST_LOG_DYN_LINK -DDEBUG src/Logger.cpp
g++ -o build/logtest build/Logger.o -lboost_log -lboost_log_setup -lboost_date_time -lboost_thread -lboost_wave -lboost_regex -lboost_program_options
这是我的代码：
Logger.cpp
/*
* Logger.cpp
*
* Created on: 2011-01-17
* Author: jarrett
*/
#include "Logger.h"
namespace logging = boost::log;
namespace sinks = boost::log::sinks;
namespace src = boost::log::sources;
namespace expr = boost::log::expressions;
namespace attrs = boost::log::attributes;
namespace keywords = boost::log::keywords;
namespace dhlogging {
Logger::Logger(std::string fileName)
{
initialize(fileName);
}
Logger::Logger(Logger const&)
{
}
Logger::~Logger()
{
}
Logger* Logger::logger_ = nullptr;
Logger* Logger::getInstance(std::string logFile)
{
if ( Logger::logger_ == nullptr ) {
logging::add_file_log( logFile );
logging::core::get()->set_filter
(
logging::trivial::severity >= logging::trivial::info
);
logging::add_common_attributes();
Logger::logger_ = new Logger(logFile);
}
return Logger::logger_;
}
void Logger::initialize(std::string fileName)
{
BOOST_LOG(log_) << "Hello, World!";
BOOST_LOG_SEV(log_, info) << "Hello, World2!";
}
void Logger::logInfo(std::string message)
{
BOOST_LOG_SEV(log_, info) << message;
}
void Logger::logDebug(std::string message)
{
BOOST_LOG_SEV(log_, debug) << message;
}
void Logger::logWarn(std::string message)
{
BOOST_LOG_SEV(log_, warning) << message;
}
void Logger::logError(std::string message)
{
BOOST_LOG_SEV(log_, error) << message;
}
void Logger::logFatal(std::string message)
{
BOOST_LOG_SEV(log_, fatal) << message;
}
}
int main(int, char*[])
{
logging::add_common_attributes();
using namespace logging::trivial;
dhlogging::Logger::getInstance()->logInfo("himom");
return 0;
}
Logger.h
/*
* Logger.h
*
* Created on: 2011-01-17
* Author: jarrett
*/
#ifndef LOGGER_H_
#define LOGGER_H_
#include <map>
#include <boost/log/core.hpp>
#include <boost/log/trivial.hpp>
#include <boost/log/expressions.hpp>
#include <boost/log/sinks/text_file_backend.hpp>
#include <boost/log/utility/setup/file.hpp>
#include <boost/log/utility/setup/common_attributes.hpp>
#include <boost/log/sources/severity_logger.hpp>
#include <boost/log/sources/record_ostream.hpp>
namespace logging = boost::log;
namespace sinks = boost::log::sinks;
namespace src = boost::log::sources;
namespace expr = boost::log::expressions;
namespace attrs = boost::log::attributes;
namespace keywords = boost::log::keywords;
using namespace logging::trivial;
namespace dhlogging {
class Logger {
public:
static Logger* getInstance(std::string logFile = "default.log");
void logInfo(std::string message);
void logDebug(std::string message);
void logWarn(std::string message);
void logError(std::string message);
void logFatal(std::string message);
private:
Logger(std::string fileName);
Logger(Logger const&);
Logger& operator=(Logger const&);
virtual ~Logger();
void initialize(std::string fileName);
src::severity_logger< severity_level > log_;
static Logger* logger_; // singleton instance
};
}
#endif /* LOGGER_H_ */