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http://issues.apache.org/bugzilla/show_bug.cgi?id=43403 Summary: PatternLayout: new format modifer: prefix if non-empty Product: Log4j Version: 1.2 Platform: Other OS/Version: other Status: NEW Severity: normal Priority: P2 Component: Layout AssignedTo: [email protected] ReportedBy: [EMAIL PROTECTED] PatternLayout needs new format modifier: prefix to be used when parameters evaluates to the non- empty string. So pattern could be written as: [%c%{x;prefix="-"}] %m that outputs [app.Something-7777] message if NDC is 7777, and [app.Something] message if NDC is empty (no chars before square bracket). This is must have thing for MDC: when several should be printed, and some of them could be unset: [%c${X;key=clientId;prefix=" clientId="}%{X;key=city;prefix=" city="}] %m should be evaluated to [app.something clientId=777 city=Moscow] message [app.something clientId=888] message [app.something city=Moscow] message [app.something] message depending on what values are set in MDC. -- Configure bugmail: http://issues.apache.org/bugzilla/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the assignee for the bug, or are watching the assignee. --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
