zendframework/zf2 — pull request #6183 by localheinz (2014-04-23 20:54:11+00:00)
Title: Enhancement: Introduce ReferenceId processor

This PR introduces a `Log\Processor\ReferenceId` processor that

* mixes in a `referenceId` into the `extra` array (i.e., event context)
* allows for setting / retrieving said identifier

Follows https://github.com/zendframework/zf2/pull/6178#issuecomment-41212314.