Stefan, Could you please expand on the use case? Stefan Armbruster wrote:
Hi,
is there a way to redirect log messages depending on a MDC variable to different appenders? The logback manual only uses MDC values for the pattern inside a single appender.
Example: assume, the code sets a MDC variable "context". If a log message is supplied with context="A", it should be written to application_A.log, if it has context="B", the message should be written to application_B.log, and so on.
If this is not possible by default, it should be possible to write a kind of MDCAwareAppenderWrapper like this (only pseudo code below):
public class MDCAwareAppenderWrapper<E> implements Appender<E> { Map<String,Appender> appenderMap; String mdcName;
... setters and getters omitted
public void doAppend(E event) { LoggingEvent le = (LoggingEvent)event; String mdcValue = le.getMDCPropertyMap().get(mdcName); Appender appender = appenderMap.get(mdcValue); appender.doAppend(event); } }
MDCAwareAppenderWrapper is configured by a Map<String,Appender> that maps MDC values (A and B from the example above) to the real appenders.
Any hints or comments on that?
Kind regards, Stefan _______________________________________________ Logback-user mailing list Logback-user@qos.ch http://qos.ch/mailman/listinfo/logback-user
-- -- Ceki Gülcü QOS.ch is looking to hire talented developers in Switzerland. If interested, please contact c e k i @ q o s . c h