/*
* Copyright 2002-2007 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.core.task;
/**
* Extended interface for asynchronous {@link TaskExecutor} implementations,
* offering an overloaded {@link #execute(Runnable, long)} variant with
* start timeout parameter.
*
* <p>Implementing this interface also indicates that the {@link #execute(Runnable)}
* method will not execute its Runnable in the caller's thread but rather
* asynchronously in some other thread (at least usually).
*
* @author Juergen Hoeller
* @since 2.0.3
* @see SimpleAsyncTaskExecutor
* @see org.springframework.scheduling.SchedulingTaskExecutor
*/
public interface AsyncTaskExecutor extends TaskExecutor {
/** Constant that indicates immediate execution */
long TIMEOUT_IMMEDIATE = 0;
/** Constant that indicates no time limit */
long TIMEOUT_INDEFINITE = Long.MAX_VALUE;
/**
* Execute the given <code>task</code>.
* @param task the <code>Runnable</code> to execute (never <code>null</code>)
* @param startTimeout the time duration within which the task is supposed to start.
* This is intended as a hint to the executor, allowing for preferred handling
* of immediate tasks. Typical values are {@link #TIMEOUT_IMMEDIATE} or
* {@link #TIMEOUT_INDEFINITE} (the default as used by {@link #execute(Runnable)}).
* @throws TaskTimeoutException in case of the task being rejected because
* of the timeout (i.e. it cannot be started in time)
* @throws TaskRejectedException if the given task was not accepted
*/
void execute(Runnable task, long startTimeout);
}