how to override the LogbackMDCAdapter

11 Oct 2013

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I am having trouble overriding the LogbackMDCAdapter.  No matter what
happens, MDC.getAdapter().getClass() returns
ch.qos.logback.classic.util.LogbackMDCAdapter
It is important to mention that I am using slf4j with logback.  Here is
my config:
<?xml version="1.0" encoding="UTF-8"?>
<configuration>
  <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
    <!-- encoders are assigned the type
         ch.qos.logback.classic.encoder.PatternLayoutEncoder by default -->
    <encoder>
      <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} %-5level [%thread] %C:%L
%msg%n</pattern>
    </encoder>
  </appender>
  <appender name="jobLoggerAppender"
class="ch.qos.logback.classic.sift.SiftingAppender">

    <discriminator
class="ch.qos.logback.classic.sift.MDCBasedDiscriminator">
        <key>jobGroup</key>
        <key>jobName</key>
        <key>jobId</key>
        <defaultValue>unknown</defaultValue>

    </discriminator>

        <sift>
            <appender  name="${jobGroup}-${jobName}-${jobId}"
class="ch.qos.logback.core.FileAppender">
                <file>${jobGroup}/${jobName}/${jobId}.log</file>
                <layout class="ch.qos.logback.classic.PatternLayout">
                    <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} %-5level
[%thread] %C:%L %msg%n</pattern>
                </layout>
            </appender>
        </sift>
    </appender>

  <!-- Strictly speaking, the level attribute is not necessary since -->
  <!-- the level of the root level is set to DEBUG by default.       -->
  <root level="DEBUG">         
    <appender-ref ref="STDOUT" />
    <appender-ref ref="FILE" />
  </root>
  <logger name="jobLogger" level="debug" >
      <appender-ref ref="jobLoggerAppender"/>
  </logger>

</configuration>

As you can see, I do have the class attribute set on the decriminator. 
And I use the slf4j MDC class to put() the 3 values jobGroup, jobName
and jobId in the MDC.  Any ideas?

- -- 
Cheers,
Matt Young
solid@youngdev.net
http://youngdev.net

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Matt Young

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