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/*
* Scheduler.java October 2014
*
* Copyright (C) 2014, Niall Gallagher <niallg@users.sf.net>
*
* 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.simpleframework.common.thread;
import java.util.concurrent.Executor;
import java.util.concurrent.TimeUnit;
/**
* The <code>Scheduler</code> interface represents a means to execute
* a task immediately or after a specified delay. This queues the
* task for the requested period of time before it is executed, if a
* delay is specified. How the task is executed is dependent on the
* implementation, however it will normally use a thread pool.
*
* @author Niall Gallagher
*/
public interface Scheduler extends Executor {
/**
* This will execute the task within the executor after the time
* specified has expired. If the time specified is zero then it
* will be executed immediately. Once the scheduler has been
* stopped then this method will no longer accept runnable tasks.
*
* @param task this is the task to schedule for execution
* @param delay the time in milliseconds to wait for execution
*/
void execute(Runnable task, long delay);
/**
* This will execute the task within the executor after the time
* specified has expired. If the time specified is zero then it
* will be executed immediately. Once the scheduler has been
* stopped then this method will no longer accept runnable tasks.
*
* @param task this is the task to schedule for execution
* @param delay this is the delay to wait before execution
* @param unit this is the duration time unit to wait for
*/
void execute(Runnable task, long delay, TimeUnit unit);
}
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