Logback - dynamic configuration

Question

Is it possible to configure logback in such way that custom logback property :

<configuration scan="true" scanPeriod="60 seconds">

  <property name="logFullMessage" value="false" />

  <!-- project appenders defitions -->
  <!-- project loggers defititions -->

</configuration>

will influence which pattern or appender will be used ? We do have web services application which operates with large requests/responses, by default we do not wish to log request/response body, but when problem occurs we would like to have option to switch it on (logFullMessage=true) and store full response body into the log file.

Answer 1

To switch the used appender you could do (only relevant lines are shown):

<property name="USE_APPENDER" value="FILE1" />

<appender name="FILE1" class="ch.qos.logback.core.FileAppender">
  ....
</appender>

<appender name="FILE2" class="ch.qos.logback.core.FileAppender">
  ....
</appender>

<root level="warn">
    <appender-ref ref="${USE_APPENDER}"/>
</root>

This in combination with the rescan options which you already have enabled makes it possible to switch the appenders.