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Java example source code file (TestThreadId.java)
The TestThreadId.java Java example source code/* * Copyright (c) 2007, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ /* * @test * @bug 6434084 * @summary Exercise ThreadLocal javadoc "demo" class ThreadId * @author Pete Soper */ public final class TestThreadId extends Thread { // number of times to create threads and gather their ids private static final int ITERATIONCOUNT = 50; // Threads constructed per iteration. ITERATIONCOUNT=50 and // THREADCOUNT=50 takes about one second on a sun Blade 1000 (2x750mhz) private static final int THREADCOUNT = 50; // The thread local storage object for holding per-thread ids private static ThreadId id = new ThreadId(); // Holds the per-thread so main method thread can collect it. JMM // guarantees this is valid after this thread joins main method thread. private int value; private synchronized int getIdValue() { return value; } // Each child thread just publishes its id value for validation public void run() { value = id.get(); } public static void main(String args[]) throws Throwable { // holds true corresponding to a used id value boolean check[] = new boolean[THREADCOUNT*ITERATIONCOUNT]; // the test threads TestThreadId u[] = new TestThreadId[THREADCOUNT]; for (int i = 0; i < ITERATIONCOUNT; i++) { // Create and start the threads for (int t=0;t<THREADCOUNT;t++) { u[t] = new TestThreadId(); u[t].start(); } // Join with each thread and get/check its id for (int t=0;t<THREADCOUNT;t++) { try { u[t].join(); } catch (InterruptedException e) { throw new RuntimeException( "TestThreadId: Failed with unexpected exception" + e); } try { if (check[u[t].getIdValue()]) { throw new RuntimeException( "TestThreadId: Failed with duplicated id: " + u[t].getIdValue()); } else { check[u[t].getIdValue()] = true; } } catch (Exception e) { throw new RuntimeException( "TestThreadId: Failed with unexpected id value" + e); } } } } // main } // TestThreadId Other Java examples (source code examples)Here is a short list of links related to this Java TestThreadId.java source code file: |
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