Re: [Log4cplus-devel] some questions about log4cplus 1.0.3

[Václav H. <v.h...@sh...>]

Liu Xiao wrote, On 28.3.2009 19:19:
> hi,wilx
Hi, please, next time use either the support tracker or the log4cplus-devel
mailing list so that everybody can participate.

> 
> thanks for reading
> 
> I am trying to use log4cplus in some of my works, and i wrote a simple
> program attached with this e-mail.
> 
> the program is a very simple multi-threads program,just in the same way
> i hope to use in my real works,but this program can't run properly under
> linux.
Next time also provide more information. What is that you expect? What is
that you actually get? If these two differ then why do you think one is wrong
and the other is right? Etc.

> 
> In my real works,there would be a lot of different log need to be
> written, all writing called from different thread in a threads-pool, and
> different thread may write log to the same file.
> 
> I have tried very hard to solve it. but still have no idea what's wrong
> with it.
> 
> Would you please tell me the right way to use log4cplus in this manner.
> thanks a lot.
I have commented out LogInThread2() and changed #if 0 to #if 1:

int main(int argc,const char* argv[])
{
#if 1
        // rollingfileappender
        SharedAppenderPtr appender(new
RollingFileAppender("./log/test.log",1024));
        appender->setName("test");
        // patternlayout
        std::string pattern = "%d{%m/%d/%y %H:%M:%S}  - %m [%l]%n";
        std::auto_ptr<Layout> layout(new PatternLayout(pattern));
        // attach layout to appender
        appender->setLayout(layout);
        // get a logger
        Logger logger = Logger::getInstance("test");
        // attach appender to logger
        logger.addAppender(appender);
        /// set log level
        logger.setLogLevel(ALL_LOG_LEVEL);

        //LOG4CPLUS_DEBUG(logger,"this is debug message from appender test...");

        // log in other func
        LogToLoggerGot();

        // log to size split
        LogToSizeSplit();

        // log to thread
        LogInThread();
#endif

        //      LogInThread2();

        return 0;
}

Here, LogInThread2() will never work right. Once you exit main(), log4cplus
will deinitialize and stop working. LogInThread() does it right, you have to
wait for the threads to finish.

In void* FuncThread(void* data), you have line:

std::string path = "./log/"+ix+"/test.log";

This will not work, the appender does not create directory structure. The
directory with the name in the ix variable does not exist. Changing the line
like in the following example makes it log nicely into files in the log
directory:

std::string path = "./log/"+ix+"-test.log";

> 
> ps:
> 
> version of log4cplus : 1.0.3 (log4cplus-1.0.3.tar.bz2
> <http://downloads.sourceforge.net/log4cplus/log4cplus-1.0.3.tar.bz2?use_mirror=nchc>),
> also tried 1.0.2,which makes no difference.
> configure called like this: ./configure
> --prefix=/home/liuxiao/lib/log4cplus/ --enable-debugging --with-pic
> --enable-threads=yes

--
VH

PS: I am adding CC to log4cplus-devel mailing list.