Out of curiosity, why does ILoggingEvent reference LoggerContextVO? I would have thought you would have created an interface named ILoggerContext and had the ILoggingEvent interface reference that instead of a concrete implementation. Ralph On Aug 19, 2009, at 7:41 AM, Ceki Gulcu wrote:
Hello Hauke,
For application-wide values, you don't need to use MDC. Logback offers a better suited alternative in the form of context properties. Every logger is attached to a context, you can obtain it as:
LoggerContext lc = (LoggerContext) LoggerFactory.getILoggerFactory();
you can then write:
lc.putProperty("key", "val");
Context properties can also be set via configuration files. See http://logback.qos.ch/manual/configuration.html#variableSubstitution
Moreover, every logging event generated by logback will contain the properties contained in the context, i.e. they are available to all appenders. Context information is also serialized with each outgoing logging event.
If you are only interested in setting the name of the application, you can set the name of the context in the configuration file. See http://logback.qos.ch/manual/configuration.html#contextName
The %contextName conversion word in PatternLayout will output the name of the logger context.
I think the above meets the requirements you mentioned, doesn't it?
HTH,
haukex wrote:
Hi Ralph, Thanks for the information, I was also thinking about writing some custom code to insert the value in the MDC myself, but I was hoping this might be supported out-of-the-box :) Since the value really is application- wide, it makes more sense to me as something to be configured in logback.xml... I was thinking of writing a custom filter that does nothing but set this value in the MDC, but that seems a little wasteful. Regards, -- Hauke D rgoers wrote:
In my organization we use a mechanism very similar to that shown in http://www.slf4j.org/extensions.html#event_logger . SLF4J doesn't provide standard key names or methods for common fields, but you can easily create a wrapper of the MDC to do this. We have a class called RequestContext that does exactly that. All our applications use that class to access the data in the MDC.
Ralph
-- Ceki Gülcü Logback: The reliable, generic, fast and flexible logging framework for Java. http://logback.qos.ch _______________________________________________ Logback-user mailing list Logback-user@qos.ch http://qos.ch/mailman/listinfo/logback-user