--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/java/util/concurrent/ThreadPoolExecutor/ScheduledTickleService.java Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,186 @@
+/*
+ * Copyright 2006 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+/*
+ * @test
+ * @bug 6362121
+ * @summary Test one ScheduledThreadPoolExecutor extension scenario
+ * @author Martin Buchholz
+ */
+
+// based on a test kindly provided by Holger Hoffstaette <holger@wizards.de>
+
+import java.util.concurrent.*;
+import static java.util.concurrent.TimeUnit.MILLISECONDS;
+
+public class ScheduledTickleService {
+
+ // We get intermittent ClassCastException if greater than 1
+ // because of calls to compareTo
+ private final static int concurrency = 2;
+
+ // Record when tasks are done
+ public final static CountDownLatch done = new CountDownLatch(concurrency);
+
+ public static void realMain(String... args) throws InterruptedException {
+ // our tickle service
+ ScheduledExecutorService tickleService =
+ new ScheduledThreadPoolExecutor(concurrency) {
+ // We override decorateTask() to return a custom
+ // RunnableScheduledFuture which explicitly removes
+ // itself from the queue after cancellation.
+ protected <V> RunnableScheduledFuture<V>
+ decorateTask(Runnable runnable,
+ RunnableScheduledFuture<V> task) {
+ final ScheduledThreadPoolExecutor exec = this;
+ return new CustomRunnableScheduledFuture<V>(task) {
+ // delegate to wrapped task, except for:
+ public boolean cancel(boolean b) {
+ // cancel wrapped task & remove myself from the queue
+ return (task().cancel(b)
+ && exec.remove(this));}};}};
+
+ for (int i = 0; i < concurrency; i++)
+ new ScheduledTickle(i, tickleService)
+ .setUpdateInterval(25, MILLISECONDS);
+
+ done.await();
+ tickleService.shutdown();
+ pass();
+ }
+
+ // our Runnable
+ static class ScheduledTickle implements Runnable {
+ public volatile int failures = 0;
+
+ // my tickle service
+ private final ScheduledExecutorService service;
+
+ // remember my own scheduled ticket
+ private ScheduledFuture ticket = null;
+
+ // remember the number of times I've been tickled
+ private int numTickled = 0;
+
+ // my private name
+ private final String name;
+
+ public ScheduledTickle(int i, ScheduledExecutorService service) {
+ super();
+ this.name = "Tickler-"+i;
+ this.service = service;
+ }
+
+ // set my tickle interval; 0 to disable further tickling.
+ public synchronized void setUpdateInterval(long interval,
+ TimeUnit unit) {
+ // cancel & remove previously created ticket
+ if (ticket != null) {
+ ticket.cancel(false);
+ ticket = null;
+ }
+
+ if (interval > 0 && ! service.isShutdown()) {
+ // requeue with new interval
+ ticket = service.scheduleAtFixedRate(this, interval,
+ interval, unit);
+ }
+ }
+
+ public synchronized void run() {
+ try {
+ check(numTickled < 6);
+ numTickled++;
+ System.out.println(name + ": Run " + numTickled);
+
+ // tickle 3 times and then slow down
+ if (numTickled == 3) {
+ System.out.println(name + ": slower please!");
+ this.setUpdateInterval(100, MILLISECONDS);
+ }
+ // ..but only 5 times max.
+ else if (numTickled == 5) {
+ System.out.println(name + ": OK that's enough.");
+ this.setUpdateInterval(0, MILLISECONDS);
+ ScheduledTickleService.done.countDown();
+ }
+ } catch (Throwable t) { unexpected(t); }
+ }
+ }
+
+ // This is just a generic wrapper to make up for the private ScheduledFutureTask
+ static class CustomRunnableScheduledFuture<V>
+ implements RunnableScheduledFuture<V> {
+ // the wrapped future
+ private RunnableScheduledFuture<V> task;
+
+ public CustomRunnableScheduledFuture(RunnableScheduledFuture<V> task) {
+ super();
+ this.task = task;
+ }
+
+ public RunnableScheduledFuture<V> task() { return task; }
+
+ // Forwarding methods
+ public boolean isPeriodic() { return task.isPeriodic(); }
+ public boolean isCancelled() { return task.isCancelled(); }
+ public boolean isDone() { return task.isDone(); }
+ public boolean cancel(boolean b) { return task.cancel(b); }
+ public long getDelay(TimeUnit unit) { return task.getDelay(unit); }
+ public void run() { task.run(); }
+
+ public V get()
+ throws InterruptedException, ExecutionException {
+ return task.get();
+ }
+
+ public V get(long timeout, TimeUnit unit)
+ throws InterruptedException, ExecutionException, TimeoutException {
+ return task.get(timeout, unit);
+ }
+
+ public int compareTo(Delayed other) {
+ if (this == other)
+ return 0;
+ else if (other instanceof CustomRunnableScheduledFuture)
+ return task.compareTo(((CustomRunnableScheduledFuture)other).task());
+ else
+ return task.compareTo(other);
+ }
+ }
+
+ //--------------------- 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");}
+}