/*
* Copyright 2002-2012 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.scheduling;
import java.util.Date;
/**
* Common interface for trigger objects that determine the next execution time
* of a task that they get associated with.
*
* @author Juergen Hoeller
* @since 3.0
* @see TaskScheduler#schedule(Runnable, Trigger)
* @see org.springframework.scheduling.support.CronTrigger
*/
public interface Trigger {
/**
* Determine the next execution time according to the given trigger context.
* @param triggerContext context object encapsulating last execution times
* and last completion time
* @return the next execution time as defined by the trigger,
* or {@code null} if the trigger won't fire anymore
*/
Date nextExecutionTime(TriggerContext triggerContext);
}