Remko Popma created LOG4J2-1401:
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Summary: Support changing the log level for all messages related
to some domain object
Key: LOG4J2-1401
URL: https://issues.apache.org/jira/browse/LOG4J2-1401
Project: Log4j 2
Issue Type: New Feature
Components: Core, Filters
Affects Versions: 2.6
Reporter: Remko Popma
During system operations, it is commonly desirable to temporarily make logging
for a certain domain object more verbose. For example, all log messages related
to processing a certain order, or for a certain user, or for a certain product.
In addition to manually increasing/decreasing verbosity, it would be nice if we
can restore the original verbosity if some condition no longer holds. For
example, log at some verbose level
* for some period of time (5 minutes)
* for some fixed number of events (10,000 log messages)
* any other user-specified condition
*How to identify which log messages to log at more verbose level*
* Marker
* ThreadContext map
* Other?
Markers are cached forever, which may not be desirable if we need to tag every
log message with the order ID, user ID and/or product ID.
ThreadContext is a good option since values can be replaced and/or cleared so
we don't use up increasingly more memory. The drawback of the ThreadContext API
is that values must be Strings.
We would like the ability to specify arbitrary Object values, or even primitive
values. Also, ideally this should be garbage-free (LOG4J2-1349).
*Considerations for a new or extended ThreadContext*
* Adding or setting values: what should the user-facing API look like?
* Merging the snapshot of the current ThreadContext map with the Configuration
Properties into the LogEvent map
* Getting values out of the LogEvent for use by Filters and/or Layouts. This
may be by a specified key or by iterating over the keys.
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