001/*
002 * Copyright 2002-2016 the original author or authors.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *      https://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package org.springframework.core.task;
018
019import java.util.concurrent.Executor;
020
021/**
022 * Simple task executor interface that abstracts the execution
023 * of a {@link Runnable}.
024 *
025 * <p>Implementations can use all sorts of different execution strategies,
026 * such as: synchronous, asynchronous, using a thread pool, and more.
027 *
028 * <p>Equivalent to JDK 1.5's {@link java.util.concurrent.Executor}
029 * interface; extending it now in Spring 3.0, so that clients may declare
030 * a dependency on an Executor and receive any TaskExecutor implementation.
031 * This interface remains separate from the standard Executor interface
032 * mainly for backwards compatibility with JDK 1.4 in Spring 2.x.
033 *
034 * @author Juergen Hoeller
035 * @since 2.0
036 * @see java.util.concurrent.Executor
037 */
038@FunctionalInterface
039public interface TaskExecutor extends Executor {
040
041        /**
042         * Execute the given {@code task}.
043         * <p>The call might return immediately if the implementation uses
044         * an asynchronous execution strategy, or might block in the case
045         * of synchronous execution.
046         * @param task the {@code Runnable} to execute (never {@code null})
047         * @throws TaskRejectedException if the given task was not accepted
048         */
049        @Override
050        void execute(Runnable task);
051
052}