Send/redirect/route java.util.logging.Logger (JUL) to Logback using SLF4J?

by

It’s very easy and not a performance issue anymore.

There are two ways documented in the SLF4J manual. There are also precise examples in the Javadocs

Add jul-to-slf4j.jar to your classpath. Or through maven dependency:

<dependency>
    <groupId>org.slf4j</groupId>
     <artifactId>jul-to-slf4j</artifactId>
    <version>1.7.0</version>
</dependency>

If you don’t have logging.properties (for java.util.logging), add this to your bootstrap code:

SLF4JBridgeHandler.removeHandlersForRootLogger();
SLF4JBridgeHandler.install();

If you have logging.properties (and want to keep it), add this to it:

handlers = org.slf4j.bridge.SLF4JBridgeHandler

In order to avoid performance penalty, add this contextListener to logback.xml (as of logback version 0.9.25):

<?xml version="1.0" encoding="UTF-8"?>
<configuration>

    <contextListener class="ch.qos.logback.classic.jul.LevelChangePropagator">
        <!-- reset all previous level configurations of all j.u.l. loggers -->
        <resetJUL>true</resetJUL>
    </contextListener> 

    ...

</configuration>

More Related Contents:

  1. Configuring Log4j Loggers Programmatically
  2. How to use MDC with thread pools?
  3. How to configure slf4j-simple
  4. Is it worth to use slf4j with log4j2
  5. How to send java.util.logging to log4j?
  6. Why not use java.util.logging?
  7. Logback to log different messages to two files
  8. Disable the log from specific class/jar via logback.xml
  9. Redirect System.out and System.err to slf4j
  10. Dropwizard doesn’t log custom loggers to file
  11. Spring Boot – How to log all requests and responses with exceptions in single place?
  12. Setting a log file name to include current date in Log4j
  13. How to set up java logging using a properties file? (java.util.logging)
  14. How to enable wire logging for a java HttpURLConnection traffic?
  15. How to disable Spring logging DEBUG messages?
  16. NullPointerException stack trace not available without debug agent
  17. Logging while testing through Gradle
  18. Determine if a java application is in debug mode in Eclipse
  19. Why are the Level.FINE logging messages not showing?
  20. Are there technical reasons to prefer using logback instead of log4j?
  21. Where do I configure log4j in a JUnit test class?
  22. How to specify Log4J 2.x config location?
  23. Configuring RollingFileAppender in log4j
  24. Log runtime Exceptions in Java using log4j
  25. How to log all active properties of a spring boot application before the beans instantiation?
  26. Setting Logback Appender path programmatically
  27. When to log a stacktrace for a caught exception
  28. Logback – set log file name programmatically
  29. How to create different log files for different packages using same log4j logger?
  30. Log4J: Strategies for creating Logger instances

Leave a Comment