ogg-plugin/ggjava/resources/classes/logback-default.xml

<configuration>
  <!-- GROUPNAME is the GoldenGate process name (the "name" in "add extract {name}") -->
  <contextName>${GROUPNAME:-ggjava}</contextName>
  <property resource="app.properties" />
  <appender name="FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">
    <!-- set prudent=true if multiple processes (JVM's) writing to the same log file -->
    <prudent>false</prudent>

    <!-- Current logfile name and location -->
    <file>dirrpt/${CONTEXT_NAME}_log-${gg.log.level:-info}.log</file>

    <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">

      <!-- Rollover to "dirrpt" directory, old logs automatically compressed -->
      <fileNamePattern>dirrpt/${CONTEXT_NAME}_19.1.0.0.1.003_%d{yyyy-MM-dd}_%i.log.gz</fileNamePattern>

      <!-- Rollover daily or at the max file size. Periodically purge old logs -->
      <timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
        <maxFileSize>50MB</maxFileSize>
        <maxHistory>5</maxHistory>
      </timeBasedFileNamingAndTriggeringPolicy>
    </rollingPolicy>
    <encoder>
     <pattern>%d.%-4relative [%contextName-%thread] %-5level %logger{35} - %msg%n</pattern>
     <immediateFlush>false</immediateFlush>
     <outputPatternAsHeader>true</outputPatternAsHeader>
    </encoder>
  </appender>
   <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
    <encoder>
      <pattern>%-4relative [%thread-%contextName] %-5level %logger{30} - %msg%n</pattern>
    </encoder>
  </appender>

  <logger name="oracle.goldengate" level="${gg.log.level:-INFO}"/>
  <logger name="example" level="${gg.log.level:-INFO}"/>

  <root level="WARN">
     <appender-ref ref="FILE" />
     <!-- <appender-ref ref="STDOUT" /> -->
  </root>
</configuration>