On Fri, 2008-01-04 at 12:16 -0600, Jacob Kjome wrote: > On Fri, 04 Jan 2008 18:54:06 +0100 > simon <[EMAIL PROTECTED]> wrote: > > > > On Fri, 2008-01-04 at 11:32 +0100, Guy Pardon wrote: > >> Is there a way to log multiple strings in different calls to the SLF4J > >> API, without a newline in between? > > > > No. > > > > What do you mean "No"? That's up to the logging implementation configuration, > isn't it? SLF4J, unless it is just the simple one that does System.out, has > nothing specifically to say about newlines. > > That said, the layout assigned to an appender would need to not define the > newline. That would mean that the developer would need to include a newline > as needed when performing logging statements.
Well, either (a) SLF4J buffers/merges messages and only passes them through to the underlying system once a message is complete, or (b) SLF4J passes them through immediately, but the underlying logging lib merges them, or (c) SLF4J passes them through immediately and an appender of the underlying logging lib merges them. Option (a) is theoretically possible, but I can definitely say that no such feature currently exists. And I think it would be a bad idea. If code logs several "parts" then fails to do the "flush" then the whole message gets lost. Plus it adds complexity to the "logging adapter" layer that almost nobody will use. Option (b) and (c) are not feasable because how an app logs is determined by the app programmer but what logging lib/adapters are configured are determined by the app deployer. There is no cross-library convention for merging messages, so the application doing the logging will never know whether the lib/adapters available at runtime are capable of merging messages or not. And furthermore, I can say that I am not aware of any such "message merging" functionality in log4j or the java.util.logging implementation. So I think "no" was a pretty fair answer. If someone wants to merge several strings into a message, then they should use a StringBuffer, and then log its contents once everything necessary has been collected. As one atomic log call. Regards, Simon _______________________________________________ user mailing list [email protected] http://www.slf4j.org/mailman/listinfo/user
