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java.util.logging backend for ActorLogging system, see #2805

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[RK: assembled commit log from original branch, squashed]
akka-contrib:
- an event handler which properly sets the ThreadID on log records
- a LoggingAdapter which does synchronous logging to j.u.l.Logger
- a small logging mixin for the aforementioned adapter
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Sam Halliday 2012-12-01 23:38:48 +00:00 • committed by Roland
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Java Logging (JUL)
=================
This extension module provides a logging backend which uses the `java.util.logging` (j.u.l)
API to do the endpoint logging for `akka.event.Logging`.
Provided with this module is an implementation of `akka.event.LoggingAdapter` which is independent of any `ActorSystem` being in place. This means that j.u.l can be used as the backend, via the Akka Logging API, for both Actor and non-Actor codebases.
To enable j.u.l as the `akka.event.Logging` backend, use the following Akka config:
event-handlers = ["akka.contrib.jul.JavaLoggingEventHandler"]
To access the `akka.event.Logging` API from non-Actor code, mix in `akka.contrib.jul.JavaLogging`.
This module is preferred over SLF4J with its JDK14 backend, due to integration issues resulting in the incorrect handling of `threadId`, `className` and `methodName`.
This extension module was contributed by Sam Halliday.