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From Gary Gregory <garydgreg...@gmail.com>
Subject Re: [ANNOUNCEMENT] Apache Logging log4j 2.0-alpha1 released
Date Sun, 05 Aug 2012 18:32:34 GMT
Thank you for shepherding! :)


On Aug 5, 2012, at 14:11, Ralph Goers <ralph.goers@dslextreme.com> wrote:

The Apache Logging team is pleased to announce the Apache log4j 2.0-alpha1

Apache log4j is a well known framework for logging application behavior. Log4j
2 is an upgrade to
Log4j that provides significant improvements over its predecessor, Log4j
1.x, and provides
many of the improvements available in Logback while fixing some inherent
problems in Logback's

This is the first release of Log4j 2 and is being made available to get
feedback from the community.

Some of the features and improvements in Log4j 2 are:

* API Separation - The API for Log4j is separate from the implementation.
It is now clear to application
developers what classes and methods they can use with compatibility being
assured, while also
allowing improvements to be made to the implementation.

* Designed for Audit Logging - Unlike Log4j 1.x and Logback, Log4j 2 will
not lose events during
reconfiguration. Log4j 2 also supports Messages, which easily allow audit
events to be flow through
the framework.

* Improved Performance - Faster performance than Log4j 1.x in critical
areas and similar performance
to Logback in most circumstances.

* Support for multiple APIs - While the Log4j 2 API will provide the best
performance, support for SLF4J
and Commons Logging APIs are provided.

* Automatic Reloading of Configurations - Like Logback, Log4j 2 supports
filtering based on context data,
markers, regular expressions and other components in the Log event and can
be specified to apply
to all events before being passed to Loggers or as they pass through
Appenders. In addition, filters
can also be associated with Loggers, Unlike Logback, a common Filter class
can be used in any
of these circumstances. Log4j 2 currently supports configuration via XML or

* Plugin Architecture - All configurable components are defined as Log4j
plugins. As such, no
Log4j code must be changed to create a new Appender, Layout, Pattern
Converter, etc.
Log4j will automatically recognize properly defined plugins and use them
when they are
referenced in the configuration.

* Property Support - Properties can be referenced in the configuration and
either be directly
replace or passed to the underlying component where they can be dynamically
Properties can come from values defined in the configuration file, system
environment variables, the ThreadContext Map, and data present in the
event. Users can
further customize the property providers by adding their own Lookup Plugin

For more information see the Log4j 2 web site at

Apache log4j 2.0 requires JDK 5 or later.

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