Tuesday, October 2, 2012

How to implement CQ scheduler to run on a event

Use Case:

1) You want to implement a scheduler to run on a specific event. That event could be any thing ranging from any Node action (Add,Modify,Delete) or any replication action (Activate, Deactivate, Reverse)

Pre requisite:

1) http://sling.apache.org/site/eventing-and-jobs.html
2) http://felix.apache.org/site/apache-felix-event-admin.html
3) http://www.osgi.org/javadoc/r4v41/org/osgi/service/event/package-summary.html
4) http://sling.apache.org/apidocs/sling5/org/apache/sling/event/package-summary.html


Step 1

Step 2: Handler to perform action

Note: you can find some more code example at http://wemcode.wemblog.com


  1. It worked! Thanks for the code, I would not be able to do this on my own. I am amazed on how you did this hard coded. I always wanted to be a programmer and I had spent time on reviewing but I guess its either you have it or you don't.

  2. Clear codes and looks professional. Hopefully this is easy to implement.

  3. this is not look like scheduler but i found good implementation of event handler

    1. Scheduler is getting generated at run time here using this.scheduler.fireJobAt(path, eventJob, props, endDate);

      You can find better example of normal scheduler (Independent of event) from here http://wemcode.wemblog.com/invlidate_cache


  4. Hi Yogesh,

    Is there any console/way to check the scheduled jobs queue in CQ 5.5? We are removing the scheduled jobs using scheduler.removeJob("JobName") , but we want to make sure the jobs are indeed getting removed.


    1. Kundan,
      You can see all scheduled Job under HOST:PORT/system/console/status-slingscheduler

    2. Hi Yogesh,

      I have a Sling servlet code that is returning me some mbean information.
      However, I would want to schedule it using sling scheduler.
      Can you please let me know, as to how this could be done.
      I am struggling to get this to work.

      Any thoughts/pointers/code would be really helpful.

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