Why can't web applications just use:
https://logging.apache.org/log4j/2.x/log4j-jul/index.html
?
There seem to be more logging frameworks than application servers these
days. I don't really want to start down the road of adding a JUL
implementation for every one of them.
Mark
On 10/06/2022 20:12, Piotr P. Karwasz wrote:
Hello,
In the new major Log4j2 3.x version the Apache Logging Project is
looking for some better suited maintainers for 3rd party integration
plugins[1].
One of the plugins that is looking for a new home is
`log4j-appserver`[2]. It contains an implementation of Tomcat JULI and
of Jetty's internal logging system. However, since the migration of
Jetty to SLF4J2 in the 10.x series the latter will be discontinued.
It's a low-maintenance module, but if you were willing to accept into
the Tomcat codebase, I could help resolving any issues that might be
posted against it.
There are also a couple of Tomcat specific extensions that didn't end
up in Log4j (e.g. the PR logging-log4j2/#731 [3]), because the project
is already bloa^H^H^H^Hfull of features.
Other features can not even be implemented properly, without the
collaboration of the Tomcat project. For example I don't see any
solution that would allow a web application to:
1. contain `log4j-api` and `log4j-core` in the WAR file, so that it
can run properly in other servlet containers,
2. switch easily to another Log4j 2 API implementation, when running
under Tomcat. By easily I mean: without modification of the WAR file
(either physical or through a `Resources` context configuration) and
without changing the classloader delegation model.
Having access to the `org.apache.tomcat` package hierarchy (and the
automatic delegation to the common classloader it provides) on the
other hand, I could write a simple Log4j2 provider that delegates the
logging from the `log4j-api` copy included in the WAR file to a
`log4j-api` copy included in the server's classloader.
Piotr
[1] https://lists.apache.org/thread/3b4tn6t7zbhm66cw8yx8h8g26tyy50dj
[2] https://logging.apache.org/log4j/2.x/log4j-appserver/index.html
[3] https://github.com/apache/logging-log4j2/pull/731
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