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The following page has been changed by GuillermoGrandes: http://wiki.apache.org/james/log4j The comment on the change is: Using Log4J in Apache James New page: '''Using Log4J in James''' ---- The use is relatively easy (probed in James 2.3.0rc1) Change the SAR-INF/environment.xml. Original: {{{ <logs version="1.1"> }}} Log4J Enabled: {{{ <logs version="log4j" xmlns:log4j="http://jakarta.apache.org/log4j/" debug="false"> }}} Now... configure the log4j appenders, targets, etc... example: {{{ <?xml version="1.0"?> <!-- Example SAR-INF/environment.xml --> <server> <logs version="log4j" xmlns:log4j="http://jakarta.apache.org/log4j/" debug="false"> <!-- Send only error messages to stdout --> <appender name="STDOUT" class="org.apache.log4j.ConsoleAppender"> <param name="Threshold" value="ERROR"/> <layout class="org.apache.log4j.PatternLayout"> <param name="ConversionPattern" value="%d %-5p [%t] %C{2} (%F:%L) - %m%n"/> </layout> </appender> <!-- Log messages to a file and rotate it everyday at midnight --> <appender name="DATE_LOGFILE" class="org.apache.log4j.DailyRollingFileAppender"> <param name="File" value="${phoenix.home}/logs/james.log"/> <param name="Append" value="true"/> <!-- Rollover at midnight each day --> <param name="DatePattern" value="'.'yyyy-MM-dd"/> <!-- Message layout format --> <layout class="org.apache.log4j.PatternLayout"> <param name="ConversionPattern" value="%d %-5p [%c] %m%n"/> </layout> </appender> <!-- CATEGORIES --> <category name="smtpserver"> <priority value="INFO"/> </category> <category name="spoolmanager"> <priority value="INFO"/> </category> <category name="James.Mailet"> <priority value="INFO"/> </category> <!-- Do not show INFO about Apache utilities --> <category name="org.apache"> <priority value="WARN"/> </category> <!-- Some categories to choose : James.Mailet, James, spoolmanager, dnsserver, remotemanager, pop3server, smtpserver, nntpserver, nntp-repository, mailstore, users-store, objectstorage, connections, sockets, scheduler, fetchpop, fetchmail, ... --> <!-- ROOT CATEGORY --> <root> <priority value="DEBUG"/> <appender-ref ref="DATE_LOGFILE"/> <appender-ref ref="STDOUT" /> </root> </logs> </server> }}} And if you want that processor XML can validate the configuration file you do not forget to extract the file log4j.dtd of jar (log4j-1.2.13.jar) and to place it in directory SAR-INF/ Now you will have to add the following line in the beginning of the file SAR-INF/environment.xml {{{ <?xml version="1.0"?> <!-- For validate XML --> <!DOCTYPE logs SYSTEM "log4j.dtd"> }}} see also: [http://svn.apache.org/repos/asf/avalon/cvs-migration-snapshot/avalon-phoenix/src/java/org/apache/avalon/phoenix/components/logger/DefaultLogManager.java]