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Handle Workflow Events in AEM

Hey everybody, it's been almost three months that I have written a post. This weekend, I finally got some time and a use case which I am going to share with you.

We all know workflows play a very important role in the day to day activities of AEM. It is not unheard of that you as a user want to trigger some service/component/scheduler on some of the events in a workflow.

To achieve this, it is necessary that we listen to the workflow events in our code and perform our business logic as that event is triggered. In this post, we will see how we can achieve this using an EventHandler (to know how EventHandler works, see this post).

Since AEM has a rich set of APIs, we are fortunate that it has also an API through which we can listen to workflow-related events.
Steps: Below are the steps through which we can listen to workflow events -  Step #1 Create an Event Handler (WorkflowEventsHandler, in our case) which implements the org.osgi.service.event.EventHandler interface and implement…