1 /* 2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 3 * 4 * This code is free software; you can redistribute it and/or modify it 5 * under the terms of the GNU General Public License version 2 only, as 6 * published by the Free Software Foundation. Oracle designates this 7 * particular file as subject to the "Classpath" exception as provided 8 * by Oracle in the LICENSE file that accompanied this code. 9 * 10 * This code is distributed in the hope that it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 * version 2 for more details (a copy is included in the LICENSE file that 14 * accompanied this code). 15 * 16 * You should have received a copy of the GNU General Public License version 17 * 2 along with this work; if not, write to the Free Software Foundation, 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 * 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 * or visit www.oracle.com if you need additional information or have any 22 * questions. 23 */ 24 25 /* 26 * This file is available under and governed by the GNU General Public 27 * License version 2 only, as published by the Free Software Foundation. 28 * However, the following notice accompanied the original version of this 29 * file: 30 * 31 * Written by Doug Lea with assistance from members of JCP JSR-166 32 * Expert Group and released to the public domain, as explained at 33 * http://creativecommons.org/publicdomain/zero/1.0/ 34 */ 35 36 package java.util.concurrent; 37 38 /** 39 * A handler for tasks that cannot be executed by a {@link ThreadPoolExecutor}. 40 * 41 * @since 1.5 42 * @author Doug Lea 43 */ 44 public interface RejectedExecutionHandler { 45 46 /** 47 * Method that may be invoked by a {@link ThreadPoolExecutor} when 48 * {@link ThreadPoolExecutor#execute execute} cannot accept a 49 * task. This may occur when no more threads or queue slots are 50 * available because their bounds would be exceeded, or upon 51 * shutdown of the Executor. 52 * 53 * <p>In the absence of other alternatives, the method may throw 54 * an unchecked {@link RejectedExecutionException}, which will be 55 * propagated to the caller of {@code execute}. 56 * 57 * @param r the runnable task requested to be executed 58 * @param executor the executor attempting to execute this task 59 * @throws RejectedExecutionException if there is no remedy 60 */ rejectedExecution(Runnable r, ThreadPoolExecutor executor)61 void rejectedExecution(Runnable r, ThreadPoolExecutor executor); 62 } 63