TaskanaTaskListener

The purpose of a TaskListener is the possibility to execute external Java code when certain events occur during process execution. Therefore TaskListeners can be attached to events within the user task lifecycle, for example the creation or completion of a user task.

As explained in Camunda BPM Connector the TaskanaTaskListener executes custom external java code to persist events in an event store, using the transactional outbox pattern. The events contain all relevant information about the corresponding user task that triggered them.

Manual configuration of the TaskanaTaskListener for all user tasks in every process application is not an option, since it would simply be too cumbersome. In addition to that, any process application using the TaskanaTaskListener would need to include the class in its WAR. To solve this issue the concept of a ParseListener is used.