/*
* Copyright (c) MuleSoft, Inc. All rights reserved. http://www.mulesoft.com
* The software in this package is published under the terms of the CPAL v1.0
* license, a copy of which has been included with this distribution in the
* LICENSE.txt file.
*/
package org.mule.runtime.core.api.source.polling;
import static org.mule.runtime.core.config.i18n.CoreMessages.objectIsNull;
import org.mule.runtime.api.scheduler.Scheduler;
import java.util.concurrent.ScheduledFuture;
/**
* Scheduler for periodic jobs.
*
* @since 3.5.0, moved from {@link org.mule.runtime.core.api.schedule.SchedulerFactory}.
*/
public abstract class PeriodicScheduler {
/**
* Schedules a job.
*
* @param executor the corresponding {@link Scheduler} instance.
* @param job The {@link Runnable} job that has to be executed.
* @return the newly scheduled job.
* @throws NullPointerException In case the scheduled job handler is null.
*/
public final ScheduledFuture<?> schedule(Scheduler executor, Runnable job) {
ScheduledFuture<?> scheduler = doSchedule(executor, job);
checkNull(scheduler);
return scheduler;
}
/**
* Template method to delegate the scheduling of the job.
*
* @param executor the corresponding {@link Scheduler} instance.
* @param job The {@link Runnable} job that has to be executed.
* @return the newly scheduled job.
*/
protected abstract ScheduledFuture<?> doSchedule(Scheduler executor, Runnable job);
private void checkNull(ScheduledFuture<?> postProcessedScheduler) {
if (postProcessedScheduler == null) {
throw new NullPointerException(objectIsNull("scheduler").toString());
}
}
}