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| 1 | /* | ||
| 2 | * Copyright (c) 2004, Oracle and/or its affiliates. All rights reserved. | ||
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | ||
| 4 | * | ||
| 5 | * This code is free software; you can redistribute it and/or modify it | ||
| 6 | * under the terms of the GNU General Public License version 2 only, as | ||
| 7 | * published by the Free Software Foundation. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle in the LICENSE file that accompanied this code. | ||
| 10 | * | ||
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT | ||
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
| 14 | * version 2 for more details (a copy is included in the LICENSE file that | ||
| 15 | * accompanied this code). | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU General Public License version | ||
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, | ||
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| 20 | * | ||
| 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | |||
| 26 | package sun.tools.jconsole; | ||
| 27 | |||
| 28 | import java.util.*; | ||
| 29 | |||
| 30 | public class Worker extends Thread { | ||
| 31 | ArrayList<Runnable> jobs = new ArrayList<Runnable>(); | ||
| 32 | private boolean stopped = false; | ||
| 33 | |||
| 34 | public Worker(String name) { | ||
| 35 | super("Worker-"+name); | ||
| 36 | |||
| 37 | setPriority(NORM_PRIORITY - 1); | ||
| 38 | } | ||
| 39 | |||
| 40 | public void run() { | ||
| 41 | while (!isStopped()) { | ||
| 42 | Runnable job; | ||
| 43 | synchronized(jobs) { | ||
| 44 | while (!isStopped() && jobs.size() == 0) { | ||
| 45 | try { | ||
| 46 | jobs.wait(); | ||
| 47 | } catch (InterruptedException ex) { | ||
| 48 | } | ||
| 49 | } | ||
| 50 | |||
| 51 | if(isStopped()) break; | ||
| 52 | |||
| 53 | job = jobs.remove(0); | ||
| 54 | } | ||
| 55 | job.run(); | ||
| 56 | } | ||
| 57 | } | ||
| 58 | |||
| 59 | private synchronized boolean isStopped() { | ||
| 60 | return stopped; | ||
| 61 | } | ||
| 62 | |||
| 63 | public synchronized void stopWorker() { | ||
| 64 | stopped = true; | ||
| 65 | synchronized(jobs) { | ||
| 66 | jobs.notify(); | ||
| 67 | } | ||
| 68 | } | ||
| 69 | |||
| 70 | public void add(Runnable job) { | ||
| 71 | synchronized(jobs) { | ||
| 72 | jobs.add(job); | ||
| 73 | jobs.notify(); | ||
| 74 | } | ||
| 75 | } | ||
| 76 | |||
| 77 | public boolean queueFull() { | ||
| 78 | synchronized(jobs) { | ||
| 79 | return (jobs.size() > 0); | ||
| 80 | } | ||
| 81 | } | ||
| 82 | } | ||