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Chapter 4. Logging

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4.1. Logback Functionality

Red Hat JBoss BRMS provides logback functionality for logging configuration.

Accordingly, everything configured is logged to the Simple Logging Facade for Java SLF4J, which delegates any log to Logback, Apache Commons Logging, Log4j or java.util.logging. Add a dependency to the logging adaptor for your logging framework of choice. If you are not using any logging framework yet, you can use Logback by adding this Maven dependency:

<dependency>
   <groupId>ch.qos.logback</groupId>
   <artifactId>logback-classic</artifactId>
   <version>1.x</version>
</dependency>
Note

slf4j-nop and slf4j-simple are ideal for a light environment.

4.2. Configuring Logging

To configure the logging level of the packages, create a logback.xml file in business-central.war/WEB-INF/classes/logback.xml. To set the logging level of the org.drools package to "debug" for verbose logging, you would need to add the following line to the file:

<configuration>
  <logger name="org.drools" level="debug"/>

  ...
<configuration>

Similarly, you can configure logging for packages such as the following:

  • org.guvnor
  • org.jbpm
  • org.kie
  • org.slf4j
  • org.dashbuilder
  • org.uberfire
  • org.errai
  • etc…​

If configuring with log4j, the log4j.xml can be located at business-central.war/WEB-INF/classes/log4j.xml and can be configured in the following way:

<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">

  <category name="org.drools">
    <priority value="debug" />
  </category>

  ...

</log4j:configuration>
Note

Additional logging can be configured in the individual container. To configure logging for JBoss Enterprise Application Platform, please refer to the Red Hat JBoss Enterprise Application Platform Administration and Configuration Guide.

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