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| 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 | * An object that creates new threads on demand. Using thread factories | ||
| 40 | * removes hardwiring of calls to {@link Thread#Thread(Runnable) new Thread}, | ||
| 41 | * enabling applications to use special thread subclasses, priorities, etc. | ||
| 42 | * | ||
| 43 | * <p> | ||
| 44 | * The simplest implementation of this interface is just: | ||
| 45 | * <pre> | ||
| 46 | * class SimpleThreadFactory implements ThreadFactory { | ||
| 47 | * public Thread newThread(Runnable r) { | ||
| 48 | * return new Thread(r); | ||
| 49 | * } | ||
| 50 | * } | ||
| 51 | * </pre> | ||
| 52 | * | ||
| 53 | * The {@link Executors#defaultThreadFactory} method provides a more | ||
| 54 | * useful simple implementation, that sets the created thread context | ||
| 55 | * to known values before returning it. | ||
| 56 | * @since 1.5 | ||
| 57 | * @author Doug Lea | ||
| 58 | */ | ||
| 59 | public interface ThreadFactory { | ||
| 60 | |||
| 61 | /** | ||
| 62 | * Constructs a new {@code Thread}. Implementations may also initialize | ||
| 63 | * priority, name, daemon status, {@code ThreadGroup}, etc. | ||
| 64 | * | ||
| 65 | * @param r a runnable to be executed by new thread instance | ||
| 66 | * @return constructed thread, or {@code null} if the request to | ||
| 67 | * create a thread is rejected | ||
| 68 | */ | ||
| 69 | Thread newThread(Runnable r); | ||
| 70 | } | ||