Implement Scheduler in Liferay 6.1

Many times we want our logic to be executed at certain Date/Time .Liferay 6.X comes with in built capability of scheduler. Here is the example which can help you ..!!
1) Make below entry in Liferay-portlet.xml

	<scheduler-entry>
	<scheduler-description>test-scheduler</scheduler-description>
	<scheduler-event-listener-class>
	com.test.scheduler.UploadJob
	</scheduler-event-listener-class>
	<trigger>
	<cron>
	<cron-trigger-value>0 0 18 * * ? *</cron-trigger-value>
	</cron>
	</trigger>
	</scheduler-entry>

view raw liferay-portlet.xml hosted with ❤ by GitHub

Following cron expression indicates that the scheduler will run every day at 18:00 PM.

<cron-trigger-value>0 0 18 * * ? *<cron-trigger-value>

view raw cron-expression.xml hosted with ❤ by GitHub

To know how to write cron expression you can visit below links.
Cron Trigger
Cron Maker

2) create scheduler class.

	package com.test.scheduler;
	import com.liferay.portal.kernel.messaging.Message;
	import com.liferay.portal.kernel.messaging.MessageListener;
	import com.liferay.portal.kernel.messaging.MessageListenerException;
	import com.liferay.portal.kernel.log.Log;
	import com.liferay.portal.kernel.log.LogFactoryUtil;
	public class UploadJob implements MessageListener
	{
	private static final Log LOGGER = LogFactoryUtil.getLog(UploadJob.class);
	/**
	* Job that we need to run on scheduler
	*/
	public void receive(Message arg0) throws MessageListenerException {
	LOGGER.info("Scheduler----> receive()");
	//write your logic.
	}
	}

view raw SchedulerExample.java hosted with ❤ by GitHub