1 配置文件

log4cpp.rootCategory=DEBUG, rootAppender
log4cpp.category.sub1=DEBUG, A1, A2
log4cpp.category.sub1.sub2=DEBUG, A3
log4cpp.category.txhAppender=DEBUG, txh
 
log4cpp.appender.rootAppender=ConsoleAppender
log4cpp.appender.rootAppender.layout=PatternLayout
log4cpp.appender.rootAppender.layout.ConversionPattern=%d [%p] %m%n 
 
log4cpp.appender.A1=FileAppender
log4cpp.appender.A1.fileName=A1.log
log4cpp.appender.A1.layout=BasicLayout
 
log4cpp.appender.A2=FileAppender
log4cpp.appender.A2.threshold=WARN
log4cpp.appender.A2.fileName=A2.log
log4cpp.appender.A2.layout=PatternLayout
log4cpp.appender.A2.layout.ConversionPattern=%d [%p] %m%n 
 
log4cpp.appender.A3=RollingFileAppender
log4cpp.appender.A3.fileName=A3.log
log4cpp.appender.A3.maxFileSize=200
log4cpp.appender.A3.maxBackupIndex=1
log4cpp.appender.A3.layout=PatternLayout
log4cpp.appender.A3.layout.ConversionPattern=%d [%p] %m%n 
 
log4cpp.appender.txh=SyslogAppender
log4cpp.appender.txh.layout=PatternLayout
log4cpp.appender.txh.layout.ConversionPattern=%d [%p] %m%n

2 代码

#include <unistd.h>
#include "log4cpp/Category.hh"
#include "log4cpp/Appender.hh"
#include "log4cpp/FileAppender.hh"
#include "log4cpp/OstreamAppender.hh"
#include "log4cpp/Layout.hh"
#include "log4cpp/BasicLayout.hh"
#include "log4cpp/Priority.hh"
#include "log4cpp/PropertyConfigurator.hh"
#include "log4cpp/SyslogAppender.hh"
#include "log4cpp/LoggingEvent.hh"
#include <log4cpp/PatternLayout.hh>

int main(int argc , char* argv[])
{
    try
    {
        log4cpp::PropertyConfigurator::configure("./log4cpp.conf");
    }
    catch(log4cpp::ConfigureFailure& f)
    {
        std::cerr << f.what() << std::endl;
        return -1;
    }

    log4cpp::Category& root = log4cpp::Category::getRoot();
    log4cpp::Category& sub1 = log4cpp::Category::getInstance(std::string("sub1"));
    log4cpp::Category& sub2 = log4cpp::Category::getInstance(std::string("sub1.sub2"));
    log4cpp::Category& txh  = log4cpp::Category::getInstance(std::string("txhAppender"));

    root.warn("stom is coming");

    sub1.debug("Received storm warning");
    sub1.info("closing all hatches");

    sub2.debug("Hiding solar panels");
    sub2.error("Solar panels are blocked");
    sub2.debug("Applying protective shield");
    sub2.warn("Unfolding protective shield");
    sub2.info("Solar panels are shielded");
 
    sub1.info("All hatches closed");
    root.info("Ready for storm.");
 
    while(1)
    {
        txh.info("caonima");
        sleep(1);
    }
 
    log4cpp::Category::shutdown();
}

3 编译

g++ test2.cpp -o main -llog4cpp -lpthread