Java example source code file (Interrupt.java)

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Java - Java tags/keywords

arrayblockingqueue, arraylist, assertionerror, blockingdeque, executor, failed, fun, interruptedexception, object, runnable, scheduledthreadpoolexecutor, seconds, synchronousqueue, threading, threads, throwable, util

The Interrupt.java Java example source code

/*
 * Copyright (c) 2006, 2010, 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 6384064
 * @summary Check proper handling of interrupts
 * @run main/othervm -XX:-UseVMInterruptibleIO Interrupt
 * @author Martin Buchholz
 */

import java.util.*;
import java.util.concurrent.*;
import static java.util.concurrent.TimeUnit.*;

public class Interrupt {

    static void checkInterrupted0(Iterable<Fun> fs, Executor ex) {
        for (Fun f : fs) {
            try {
                ex.execute(new Runnable() {
                        final Thread thisThread = Thread.currentThread();
                        public void run() { thisThread.interrupt(); }});
                f.f();
                fail("Expected InterruptedException not thrown");
            } catch (InterruptedException e) {
                check(! Thread.interrupted());
            } catch (Throwable t) { unexpected(t); }
        }
    }

    static void checkInterrupted(Iterable<Fun> fs) {
        final Executor immediateExecutor = new Executor() {
                public void execute(Runnable r) {
                    r.run(); }};
        final ScheduledThreadPoolExecutor stpe
            = new ScheduledThreadPoolExecutor(1);
        final Executor delayedExecutor = new Executor() {
                public void execute(Runnable r) {
                    stpe.schedule(r, 20, MILLISECONDS); }};
        checkInterrupted0(fs, immediateExecutor);
        checkInterrupted0(fs, delayedExecutor);
        stpe.shutdown();
    }

    static void testQueue(final BlockingQueue<Object> q) {
        try {
            final BlockingDeque<Object> deq =
                (q instanceof BlockingDeque<?>) ?
                (BlockingDeque<Object>) q : null;
            q.clear();
            List<Fun> fs = new ArrayList();
            fs.add(new Fun() { void f() throws Throwable
                    { q.take(); }});
            fs.add(new Fun() { void f() throws Throwable
                    { q.poll(60, SECONDS); }});
            if (deq != null) {
                fs.add(new Fun() { void f() throws Throwable
                        { deq.takeFirst(); }});
                fs.add(new Fun() { void f() throws Throwable
                        { deq.takeLast(); }});
                fs.add(new Fun() { void f() throws Throwable
                        { deq.pollFirst(7, SECONDS); }});
                fs.add(new Fun() { void f() throws Throwable
                        { deq.pollLast(7, SECONDS); }});
            }

            checkInterrupted(fs);

            // fill q to capacity, to ensure insertions will block
            while (q.remainingCapacity() > 0)
                try { q.put(1); }
                catch (Throwable t) { unexpected(t); }

            fs.clear();
            fs.add(new Fun() { void f() throws Throwable
                    { q.put(1); }});
            fs.add(new Fun() { void f() throws Throwable
                    { q.offer(1, 7, SECONDS); }});
            if (deq != null) {
                fs.add(new Fun() { void f() throws Throwable
                        { deq.putFirst(1); }});
                fs.add(new Fun() { void f() throws Throwable
                        { deq.putLast(1); }});
                fs.add(new Fun() { void f() throws Throwable
                        { deq.offerFirst(1, 7, SECONDS); }});
                fs.add(new Fun() { void f() throws Throwable
                        { deq.offerLast(1, 7, SECONDS); }});
            }
            checkInterrupted(fs);
        } catch (Throwable t) {
          System.out.printf("Failed: %s%n", q.getClass().getSimpleName());
          unexpected(t);
        }
    }

    private static void realMain(final String[] args) throws Throwable {
        testQueue(new SynchronousQueue<Object>());
        testQueue(new ArrayBlockingQueue<Object>(1,false));
        testQueue(new ArrayBlockingQueue<Object>(1,true));
        testQueue(new LinkedBlockingQueue<Object>(1));
        testQueue(new LinkedBlockingDeque<Object>(1));
    }

    //--------------------- Infrastructure ---------------------------
    static volatile int passed = 0, failed = 0;
    static void pass() {passed++;}
    static void fail() {failed++; Thread.dumpStack();}
    static void fail(String msg) {System.out.println(msg); fail();}
    static void unexpected(Throwable t) {failed++; t.printStackTrace();}
    static void check(boolean cond) {if (cond) pass(); else fail();}
    static void equal(Object x, Object y) {
        if (x == null ? y == null : x.equals(y)) pass();
        else fail(x + " not equal to " + y);}
    public static void main(String[] args) throws Throwable {
        try {realMain(args);} catch (Throwable t) {unexpected(t);}
        System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed);
        if (failed > 0) throw new AssertionError("Some tests failed");}
    private abstract static class Fun {abstract void f() throws Throwable;}
}