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<dependency>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
<version>1.1</version>
<type>jar</type>
<url>http://jakarta.apache.org/commons/logging</url>
<properties>
<war.bundle>true</war.bundle>
</properties>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.13</version>
<type>jar</type>
<url>http://logging.apache.org/log4j/docs/</url>
<properties>
<war.bundle>true</war.bundle>
</properties>
</dependency>
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Logging is configured via a properties file (called log4j.properties) that you have to create in WEB-INF/classes. With the following properties file the output is logged in a file called
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${APPLICATION_OUTPUT_FILE}.log
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The output file is backed up once it reaches 0.5 Mb in size and a maximum of 4 backups are kept.
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#
# Configure the logger to output info level messages into a rolling log file.
#
log4j.rootLogger=INFO, R
#
# Default output file name
#
application.context=tomcat
#
# Configuration for a rolling log file ("tomcat.log").
#
log4j.appender.R=org.apache.log4j.RollingFileAppender
#
# Edit the next line to point to your logs directory.
# The last part of the name is the log file name.
#
log4j.appender.R.File=${catalina.base}/logs/APPLICATION_OUTPUT_FILE.log
log4j.appender.R.layout=org.apache.log4j.PatternLayout
log4j.appender.R.MaxFileSize=5036KB
log4j.appender.R.MaxBackupIndex=4
#
# Print the date in ISO 8601 format
#
log4j.appender.R.layout.ConversionPattern=%d %-5p - %m%n
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For more configuration options please refer to the log4j documentation at http://logging.apache.org/log4j/docs/.
Logj4 offers more flexibility than java.util.logging but requires additional dependencies.
Redirection stdout and stderr to Logger
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