kandi X-RAY | logging-log4j2 Summary
kandi X-RAY | logging-log4j2 Summary
Apache 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 architecture.
Top functions reviewed by kandi - BETA
- Compute the time after the given date .
- Parses the pattern .
- Merge filter configurations .
- Build a template resolver from a map .
- Write value .
- Create Flume appender .
- Create a pattern converter .
- Get an abbreviation from a string .
- Returns the next time .
- Factory method .
logging-log4j2 Key Features
logging-log4j2 Examples and Code Snippets
Trending Discussions on logging-log4j2
Log4j2 provides various kind of filters  and these can be configured at four levels:
- Appender Reference
In my use-case, I would like to setup a
CompositeFilter at a specified Logger (level 2 from above) using the property file syntax.
For the sake of the example let's assume that we want to setup a composite filter composed from two
.*JPQL.* respectively. Assuming that we have the following events:
ANSWERAnswered 2022-Apr-03 at 05:49
There are two problems with your configuration:
LoggerConfigaccepts only a single filter. If you want to use multiple filters, configure a
CompositeFilterexplicitly (which has a plugin name "Filters),
- The order of filters in a properties configuration file is basically random, since
Hashtableand does not have a predefined order.
Considering the two facts above a variation of your attempt 3 should work:
I'm trying to build the log4j package from source:...
ANSWERAnswered 2021-Dec-22 at 13:49
Until recently, the build process of
log4j-core depends on the build process of a companion
In a future version of the library these dependencies will be removed as described in this issue precisely to avoid potential dependency problems. The issue provides more information about was it going on:
Log4j API and Log4j Core have to build the Java 9 classes in one Maven module and then copy them into the "normal" module. The Java 9 projects are not deployed during a release. The pom.xml files were specifying both as provided dependencies. When the enforcer plugin sees this it is trying to resolve them - sometimes - and fails. It seems these don't need to be declared as dependencies because they are configured into the dependency plugin. So the dependencies should be removed from the pom files.
If you need to build the code from an older version from source, according to the changes introduced in the aforementioned commit, you first need to assembly
log4j-core-java9 and then use the dependency in the build process of
In a nutshell, try the following.
toolchains in its build process, so for JDK 11 you may need to provide an entry in
~/.m2/toolchains.xml file like the following:
I have a wrapper for log4j2 Logger class - e.g....
ANSWERAnswered 2021-Mar-26 at 09:05
Thanks to @rgoers, turns out I was missing the
@Named annotation on the parameters.
MyLoggerTest works with the following:
I would like to use log4j2 RollingFileAppender with a customized compression algorithm (ZStd).
It seems that the compression algorithms supported so far are the ones in the FileExtension enum (zip, gz, bz2, ...), see https://github.com/apache/logging-log4j2/blob/efa64bfad3f67c5b5fed6b25d65ef5ca2212011b/log4j-core/src/main/java/org/apache/logging/log4j/core/appender/rolling/FileExtension.java, and I believe it is not possible to add a new one (apart from patching the library).
A solution could be to reimplement the RollingFileAppender using the approach suggested here: https://logging.apache.org/log4j/2.x/manual/extending.html#Appenders, but this would involve a lot of ugly copy and paste, this appender really does a lot of things.
The approach I would like to follow is to create instead a new Action, implementing the AbstractAction interface, but I do not know how to tell log4j2 to execute this action on rollover. Is this doable? Is this the correct way to achieve this goal?...
ANSWERAnswered 2020-Jun-09 at 01:23
Yes. The Rollover strategy uses FileExtension to automatically add a CompressAction based on the file extension, but you can do this yourself just by configuring a custom Action. While you can look at ZipoCompressAction as a template for how to implement the action, you would also need to look at DeleteAction to see how to declare your custom action as a plugin.
I'm trying to filter out
Apache Tomcat startup(/shutdown) events from normal application logging for a third-party tool that manages the application lifecycle of various Tomcat instances. The base is
Log4j2 (2.12.1) using a
Regexfilter in the
Appender Context for a simple
File appender (example below massively simplyfied, including hard-coded values):
ANSWERAnswered 2020-Mar-27 at 12:21
Solution: the regex seems to have been wrong, removing the spaces around 'startup' makes it work.
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