Hi Wea,
Our product has code to dynamically add a console appender, but it is not
currently in use. As such, I can't say for
sure whether it works or not.
===========
static const LogString DateTimeThreadLevelClassMessagePattern
(LOG4CXX_STR("%d{dd/MM HH:mm:ss.SSS}
%-5p %c - %m%n"));
LogString lsPattern = DateTimeThreadLevelClassMessagePattern;
if (!overridePattern.IsEmpty())
{
lsPattern = GetLogString(overridePattern);
}
LoggerPtr root = Logger::getRootLogger();
LayoutPtr layout(new PatternLayout(lsPattern));
AppenderPtr appender(new ConsoleAppender(layout));
root->addAppender(appender);
==========
Code to remove a named appender is also untested and I don't know off-hand if
this works for "stdout".
GetLogString is our function which takes our own String class and creates a
LogString
=====
LogString strAppenderName = GetLogString(appenderName);
LoggerPtr root = Logger::getRootLogger();
root->removeAppender(strAppenderName);
return true;
=====
Hope this helps,
Andy
On Thu, May 9, 2013 at 11:03 AM, Wesley J. Miller <[email protected]> wrote:
>
> How would I dynamically turn log4cxx logging to the console on and off in an
> application?
>
> Goal here is to process a used choice, command line parm or GUI input or
> whatever. Thus in a hypothetical main
loop:
>
> if ( userWantsToStartConsoleLogger )
> ConsoleLogger( true );
> if ( userWantsToStopConsoleLogger )
> ConsoleLogger( false );
>
> My logging setup is:
>
> #include <log4cxx/logger.h>
> #include <log4cxx/propertyconfigurator.h>
> #include <log4cxx/helpers/exception.h>
>
> int main( int argc, char** argv )
> {
> const log4cxx::LoggerPtr logger;
> log4cxx::PropertyConfigurator::configure("./logs.config");
> }
>
> where ./logs.config looks like:
>
> log4j.rootLogger=INFO, File
>
> log4j.appender.stdout=org.apache.log4j.ConsoleAppender
> log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
> log4j.appender.stdout.layout.ConversionPattern=%5p [%t] (%F:%L) - %m%n
>
> log4j.appender.File=org.apache.log4j.RollingFileAppender
> log4j.appender.File.File=logs/system.logs
> log4j.appender.File.MaxFileSize=1MB
> log4j.appender.File.MaxBackupIndex=10
> log4j.appender.File.layout=org.apache.log4j.PatternLayout
> log4j.appender.File.layout.ConversionPattern=%d{MM/dd/yyyy HH:mm:ss:SSS a}
> %p %c %m%n
>
>
> NOTE: Presently, I have to add , stdout after FILE in the rootlogger= line to
> accomplish this.
>
> In this context, of course, the question is, what goes in my ConsoleLogger()
> function?
>
> Thanks,
>
> Wea
