Hello World Example
#include <log4cplus/logger.h>
#include <log4cplus/configurator.h>
#include <iomanip>
using namespace log4cplus;
int
main()
{
BasicConfigurator config;
config.configure();
Logger logger = Logger::getInstance("main");
LOG4CPLUS_WARN(logger, "Hello, World!");
return 0;
}
#include <log4cplus/configurator.h>
#include <iomanip>
using namespace log4cplus;
int
main()
{
BasicConfigurator config;
config.configure();
Logger logger = Logger::getInstance("main");
LOG4CPLUS_WARN(logger, "Hello, World!");
return 0;
}
ostream Example (Show how to write logging messages.)
#include <log4cplus/logger.h>
#include <log4cplus/configurator.h>
#include <iomanip>
using
namespace std;
using
namespace log4cplus;
int
main()
{
BasicConfigurator config; config.configure(); Logger logger = Logger::getInstance("logger"); LOG4CPLUS_WARN(logger, "This is" << " a reall" << "y long message." << endl << "Just testing it out" << endl << "What do you think?") LOG4CPLUS_WARN(logger, "This is a bool: " << true) LOG4CPLUS_WARN(logger, "This is a char: " << 'x') LOG4CPLUS_WARN(logger, "This is a short: " << (short)-100) LOG4CPLUS_WARN(logger, "This is a unsigned short: " << (unsigned short)100) LOG4CPLUS_WARN(logger, "This is a int: " << (int)1000) LOG4CPLUS_WARN(logger, "This is a unsigned int: " << (unsigned int)1000) LOG4CPLUS_WARN(logger, "This is a long(hex): " << hex << (long)100000000) LOG4CPLUS_WARN(logger, "This is a unsigned long: " << (unsigned long)100000000) LOG4CPLUS_WARN(logger, "This is a float: " << (float)1.2345) LOG4CPLUS_WARN(logger, "This is a double: " << setprecision(15) << (double)1.2345234234) LOG4CPLUS_WARN(logger, "This is a long double: " << setprecision(15) << (long double)123452342342.342) return 0;
}
LogLevel Example (Shows how log messages can be filtered at runtime by adjusting the LogLevel.)
#include <log4cplus/logger.h>
#include <log4cplus/configurator.h>
#include <iostream>
using
namespace std;
using
namespace log4cplus;
Logger logger = Logger::getInstance("main");
void printMessages()
{ LOG4CPLUS_TRACE(logger, "printMessages()"); LOG4CPLUS_DEBUG(logger, "This is a DEBUG message"); LOG4CPLUS_INFO(logger, "This is a INFO message"); LOG4CPLUS_WARN(logger, "This is a WARN message"); LOG4CPLUS_ERROR(logger, "This is a ERROR message"); LOG4CPLUS_FATAL(logger, "This is a FATAL message");}
int
main()
{ BasicConfigurator config; config.configure(); logger.setLogLevel(TRACE_LOG_LEVEL); cout << "*** calling printMessages() with TRACE set: ***" << endl; printMessages(); logger.setLogLevel(DEBUG_LOG_LEVEL); cout << "\n*** calling printMessages() with DEBUG set: ***" << endl; printMessages(); logger.setLogLevel(INFO_LOG_LEVEL); cout << "\n*** calling printMessages() with INFO set: ***" << endl; printMessages(); logger.setLogLevel(WARN_LOG_LEVEL); cout << "\n*** calling printMessages() with WARN set: ***" << endl; printMessages(); logger.setLogLevel(ERROR_LOG_LEVEL); cout << "\n*** calling printMessages() with ERROR set: ***" << endl; printMessages(); logger.setLogLevel(FATAL_LOG_LEVEL); cout << "\n*** calling printMessages() with FATAL set: ***" << endl; printMessages(); return 0;}
