On 9 March 2015 at 22:37, Ceki Gülcü <[email protected]> wrote:
> MDC is a thread-wide structure. At present time, it cannot be set per
> logging event. Any changes you make to the mdcPropertyMap (retrieved by
> calling event.getMDCPropertyMap()) will be visible to all future events
> generated in the same thread.
Please forgive my ignorance if I say something wrong.
ch.qos.logback.classic.spi.LoggingEvent#getMDCPropertyMap returns:
1. If MDCAdapter has an already property map, It returns this map
2. If MDCAdapter has not a map, it returns a static map(CACHED_NULL_MAP)
which is shared among other threads as well. If I set it mistakenly, It
will be used by other threads.
This parts seems a little bid problematic. I just want to share same map
reference between event and MDCAdapter which will let me:
> public FilterReply decide(ILoggingEvent event) {
> if (event.getLevel().isGreaterOrEqual(Level.WARN)) {
> MDC.put("demo","demo");
> }
> return FilterReply.ACCEPT;
> }
Also I am expecting to be cleared in case a MDC.remove call. What do you
think?
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