Creating the scheduler dynamically in liferay

We can create the scheduler by defining the entries in the liferay-portlet.xml with specfying the only particular entries. what if scheduler what to change based on the user input.

so here is the code,
String cron = "0 0/1 * 1/1 * ? *";

Portlet portlet = PortletLocalServiceUtil.getPortletById("new_WAR_UserSearchportlet");
Trigger trigger = null;
try {
trigger = TriggerFactoryUtil.buildTrigger(TriggerType.CRON, Scheduler.class.getName(), Scheduler.class.getName(), new Date(), null, cron);
} catch (SchedulerException e) {
e.printStackTrace();
}

Message message = new Message();
message.put(SchedulerEngine.CONTEXT_PATH, portlet.getContextPath());
message.put(SchedulerEngine.MESSAGE_LISTENER_CLASS_NAME, Scheduler.class.getName());
message.put(SchedulerEngine.PORTLET_ID, portlet.getPortletId());

try {
SchedulerEngineUtil.schedule(trigger, StorageType.PERSISTED, "", "liferay/scheduler_dispatch", message, 5);
} catch (SchedulerException e) {
e.printStackTrace();
}



Here we have cron which we be trigerred for every second. ie. String cron = "0 0/1 * 1/1 * ? *";

Creating the cron trigger with scheduler class

TriggerFactoryUtil.buildTrigger(TriggerType.CRON,Scheduler.class.getName(), Scheduler.class.getName(), new Date(), null, cron);


public class Scheduler implements MessageListener {

@Override
public void receive(Message message) throws MessageListenerException {

System.out.println("In Message Listener");

}



Finally the last statement is scheduling. SchedulerEngineUtil.schedule(-,-,-);

We can also delete, pause and resume
SchedulerEngineUtil.delete();
SchedulerEngineUtil.pause();
SchedulerEngineUtil.resume();