Creating scheduler in Liferay

  To create scheduler in liferay is easy just adding an entry in liferay-portal.xml and adding your custom logic in do receive method.

1.Add the following entry in liferay-portlet.xml after icon tag and before instansable tag.

   "<scheduler-description>" tag you can give your custom description

  "<scheduler-event-listener-class>" tag write your custom class where you write your custom scheduler  logic.

"cron trigger class " tag , it identifies at what scheduler runs , here scheduler runs at 12 clock at sunday.
   
        <scheduler-entry>
           <scheduler-description>scheduler entry</scheduler-description>
             <scheduler-event-listener-class>
                com.sample.scheduler.SchedulerClass
            </scheduler-event-listener-class>
           <trigger>
              <cron>
                <cron-trigger-value>0 0 12 ? * SUN *</cron-trigger-value>
              </cron>                              
           </trigger>
         </scheduler-entry>

2.          public class SchedulerClass implements MessageListener {

                  public void receive(Message message) {
                 

                            //write your custom logic here
                  }
          }

http://www.cronmaker.com/

That it you have done with your scheduler