> -----Original Message-----
> From: Josh Kelley [mailto:[EMAIL PROTECTED]
> Sent: Tuesday, March 18, 2008 9:10 AM
> To: [email protected]
> Subject: Use of operator<<
>
> I saw that I can use the << operator within the LOG4CXX_DEBUG, etc.
> macros; e.g.:
>
> LOG4CXX_DEBUG(logger, "Read " << path << " and got " << out);
>
> This seems very convenient (and a whole lot more convenient
> than formatting strings myself or having to use something
> like boost::format for every log statement), but as far as I
> can tell, it's undocumented. Is this use of operator<<
> officially supported, or is it an implementation detail that
> I should not be relying upon?
>
> If it is supported, then can I add a wiki page about it? If
> it's not supported, then is there a recommended way of doing
> formatted logging?
>
> Thanks.
>
> Josh Kelley
>
Hi Josh,
As far as I can tell support was dropped for those macros, which made me sad
too. But it's not too hard to cook up some macros of your own. I did it like
this:
#define LOGGING_DEBUG(message) { \
if ((*pLogger)->isDebugEnabled()) {\
log4cxx::logstream oss(*pLogger, log4cxx::Level::getDebug());\
oss.setLocation(LOG4CXX_LOCATION);\
oss << message;\
oss.end_message();}}
This assumes you have the following declared and initialized:
log4cxx::LoggerPtr* pLogger;
Hope this helps you out. I don't know if there's an official way for doing
this.
- Stephen
