The reason I need to modify MDC properties is that there are a lot of*framework/library generated threads *. Also they are dynamically start and stop. Those threads are *not accessible* to me. When I use log4j/RewriteAppender, I can put properties without care about threads' accessibility like the following. <appender name="stdoutaddprops" class="org.apache.log4j.rewrite.RewriteAppender"> <appender-ref ref="stdout" /> <rewritePolicy class="org.apache.log4j.rewrite.PropertyRewritePolicy"> <param name="properties" value="p1=Hello,p2=World,x1=3.1415,username=${user.name}"/> <!-- here, add some MDC properties --> </rewritePolicy></appender> Is this possible to call MDC.put() for *inaccessible threads*? 2013/7/10 Ralph Goers <rgoers@apache.org>
This will modify the MDC, not just the properties in the logging event, which seems to be what was requested.
Ralph
On Jul 9, 2013, at 7:55 AM, Felipe wrote:
That should be easy. Juast add import correct classes and then do at proper section (posiblt the init of the thread) MDC.put(key, value).
On Tue, Jul 9, 2013 at 10:35 AM, KwonNam Son <kwon37xi@gmail.com> wrote:
Hello,
When I use Log4j, I can add MDC properties to LogginEvent<http://logging.apache.org/log4j/1.2/apidocs/org/apache/log4j/spi/LoggingEvent.html>by using RewriteAppender<http://logging.apache.org/log4j/1.2/apidocs/org/apache/log4j/rewrite/RewriteAppender.html>. It's possible because log4j's LoggingEvent is not an interface and it has setProperty()<http://logging.apache.org/log4j/1.2/apidocs/org/apache/log4j/spi/LoggingEvent.html#setProperty%28java.lang.String,%20java.lang.String%29>method.
Is it possible to add or modify MDC properties dynamically in Logback?
The reason I need to change MDC properties using appenders is because of some logs from unaccessible threads. I want to add hostname, application name and some of server's infomation to the logs then transfer the logs event to the central log receiver.
Thanks.
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