[logback-user] Filter does not work on tomcat

[Ceki Gülcü]

Hello Patrick,

To see any errors emitted by the EvaluatorFilter, I suggest adding the 
following line to you configuration file:

<statusListener
       class="ch.qos.logback.core.status.OnConsoleStatusListener" />

By the way, have you placed janino.jar in your web-application's class path?

HTH,

On 16/06/2010 4:45 PM, Sager, Patrick wrote:
> Hello
>
> I'm using a filter expression to determine the format of my log message.
> When running the configuration within my JUnit tests, the filter works
> perfectly.
> However, when running on a tomcat v6.0 server (within eclipse), the
> filter gets ignored and all log entries are written twice.
>
> Here's the extract of my logback.xml file:
>
>    <!-- Log file for events with an explicitly defined source -->
>      <appender name="ROLLING_LOG_WITH_SOURCE"
> class="ch.qos.logback.core.rolling.RollingFileAppender">
>          <!--  Accept only messages with an explicit source -->
>          <filter class="ch.qos.logback.core.filter.EvaluatorFilter">
>
>              <evaluator>
>                  <expression>(mdc.get("source") != null)&amp;&amp;
> !((String)mdc.get("source")).isEmpty()</expression>
>              </evaluator>
>              <OnMatch>ACCEPT</OnMatch>
>              <OnMismatch>DENY</OnMismatch>
>          </filter>
>          <file>/etc/foe/logs/LogFile.log</file>
>          <rollingPolicy
> class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
>              <!-- rollover monthly and compression of log history -->
>
> <fileNamePattern>TestLogFile-%d{yyyy-MM}.%i.zip</fileNamePattern>
>              <maxHistory>12</maxHistory>
>              <timeBasedFileNamingAndTriggeringPolicy
>
> class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
>                  <!-- or whenever the file size reaches 1MB -->
>                  <maxFileSize>1MB</maxFileSize>
>              </timeBasedFileNamingAndTriggeringPolicy>
>          </rollingPolicy>
>          <encoder>
>              <pattern>%-5level %date{yyyy-MM-dd HH:mm:ss.SSS} [%thread]
> [%X{source}] %msg%n</pattern>
>          </encoder>
>      </appender>
>
>      <!-- Log file for events with no explicitly defined source -->
>      <appender name="ROLLING_LOG_WITHOUT_SOURCE"
> class="ch.qos.logback.core.rolling.RollingFileAppender">
>          <!--  Accept discard messages with an explicit source -->
>          <filter class="ch.qos.logback.core.filter.EvaluatorFilter">
>
>              <evaluator>
>                  <expression>(mdc.get("source") != null)&amp;&amp;
> !((String)mdc.get("source")).isEmpty()</expression>
>              </evaluator>
>              <OnMatch>DENY</OnMatch>
>              <OnMismatch>ACCEPT</OnMismatch>
>          </filter>
>          <file>/etc/foe/logs/LogFile.log</file>
>          <rollingPolicy
> class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
>              <!-- rollover monthly and compression of log history -->
>
> <fileNamePattern>TestLogFile-%d{yyyy-MM}.%i.zip</fileNamePattern>
>              <maxHistory>12</maxHistory>
>              <timeBasedFileNamingAndTriggeringPolicy
>
> class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
>                  <!-- or whenever the file size reaches 1MB -->
>                  <maxFileSize>1MB</maxFileSize>
>              </timeBasedFileNamingAndTriggeringPolicy>
>          </rollingPolicy>
>          <encoder>
>              <pattern>%-5level %date{yyyy-MM-dd HH:mm:ss.SSS} [%thread]
> [%file:%line] %msg%n</pattern>
>          </encoder>
>      </appender>
>
> Is this a known issue, that LogBack does not support filters under
> tomcat?
>
> Thanks for any help
> -- Patrick