Logpipes

What is it

A LogPipe is like a pipe under Linux. Every log request no matter to which logger or channel is piped through every LogPipe that is defined. In combination with a filter this can help to trace problems. Since jLo will reload a configuration when the file has changed this can used during runtime to find problems.

How to use it

First here is an example how to define a pipe:

<pipe>    
  <generator-name>PipeGenerator</generator-name>    
</pipe>

Here is another example in combination with a filter:

<pipe>    
  <generator-name>PipeGenerator</generator-name>
  <filter-name>ExceptionFilter</filter-name>
</pipe>
<filter name="ExceptionFilter">
  <class>TextFilter</class>
  <parameter name="expression" value="Exception"/>    
</filter>

This LogPipe will use the TextFiler and only let through messages that contains the word Exception.