--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/java/util/concurrent/ThreadPoolExecutor/ConfigChanges.java Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,251 @@
+/*
+ * Copyright 2007 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 6450200
+ * @summary Test proper handling of pool state changes
+ * @run main/othervm ConfigChanges
+ * @author Martin Buchholz
+ */
+
+import java.security.*;
+import java.util.*;
+import java.util.concurrent.*;
+import java.util.concurrent.atomic.*;
+import static java.util.concurrent.TimeUnit.*;
+
+public class ConfigChanges {
+ final static ThreadGroup tg = new ThreadGroup("pool");
+
+ final static Random rnd = new Random();
+
+ static void report(ThreadPoolExecutor tpe) {
+ try {
+ System.out.printf(
+ "active=%d submitted=%d completed=%d queued=%d sizes=%d/%d/%d%n",
+ tg.activeCount(),
+ tpe.getTaskCount(),
+ tpe.getCompletedTaskCount(),
+ tpe.getQueue().size(),
+ tpe.getPoolSize(),
+ tpe.getCorePoolSize(),
+ tpe.getMaximumPoolSize());
+ } catch (Throwable t) { unexpected(t); }
+ }
+
+ static void report(String label, ThreadPoolExecutor tpe) {
+ System.out.printf("%10s ", label);
+ report(tpe);
+ }
+
+ static class PermissiveSecurityManger extends SecurityManager {
+ public void checkPermission(Permission p) { /* bien sur, Monsieur */ }
+ }
+
+ static void checkShutdown(final ExecutorService es) {
+ final Runnable nop = new Runnable() {public void run() {}};
+ try {
+ if (new Random().nextBoolean()) {
+ check(es.isShutdown());
+ if (es instanceof ThreadPoolExecutor)
+ check(((ThreadPoolExecutor) es).isTerminating()
+ || es.isTerminated());
+ THROWS(RejectedExecutionException.class,
+ new Fun() {void f() {es.execute(nop);}});
+ }
+ } catch (Throwable t) { unexpected(t); }
+ }
+
+ static void checkTerminated(final ThreadPoolExecutor tpe) {
+ try {
+ checkShutdown(tpe);
+ check(tpe.getQueue().isEmpty());
+ check(tpe.isTerminated());
+ check(! tpe.isTerminating());
+ equal(tpe.getActiveCount(), 0);
+ equal(tpe.getPoolSize(), 0);
+ equal(tpe.getTaskCount(), tpe.getCompletedTaskCount());
+ check(tpe.awaitTermination(0, SECONDS));
+ } catch (Throwable t) { unexpected(t); }
+ }
+
+ static Runnable waiter(final CyclicBarrier barrier) {
+ return new Runnable() { public void run() {
+ try { barrier.await(); barrier.await(); }
+ catch (Throwable t) { unexpected(t); }}};
+ }
+
+ static volatile Runnable runnableDuJour;
+
+ private static void realMain(String[] args) throws Throwable {
+ if (rnd.nextBoolean())
+ System.setSecurityManager(new PermissiveSecurityManger());
+
+ final boolean prestart = rnd.nextBoolean();
+
+ final Thread.UncaughtExceptionHandler handler
+ = new Thread.UncaughtExceptionHandler() {
+ public void uncaughtException(Thread t, Throwable e) {
+ check(! Thread.currentThread().isInterrupted());
+ unexpected(e);
+ }};
+
+ final int n = 3;
+ final ThreadPoolExecutor tpe
+ = new ThreadPoolExecutor(n, 3*n,
+ 3L, MINUTES,
+ new ArrayBlockingQueue<Runnable>(3*n));
+ tpe.setThreadFactory(new ThreadFactory() {
+ public Thread newThread(Runnable r) {
+ Thread t = new Thread(tg, r);
+ t.setUncaughtExceptionHandler(handler);
+ return t;
+ }});
+
+ if (prestart) {
+ tpe.prestartAllCoreThreads();
+ equal(tg.activeCount(), n);
+ equal(tg.activeCount(), tpe.getCorePoolSize());
+ }
+
+ final Runnable runRunnableDuJour =
+ new Runnable() { public void run() {
+ // Delay choice of action till last possible moment.
+ runnableDuJour.run(); }};
+ final CyclicBarrier pumpedUp = new CyclicBarrier(3*n + 1);
+ runnableDuJour = waiter(pumpedUp);
+
+ if (prestart) {
+ for (int i = 0; i < 1*n; i++)
+ tpe.execute(runRunnableDuJour);
+ // Wait for prestarted threads to dequeue their initial tasks.
+ while (! tpe.getQueue().isEmpty())
+ Thread.sleep(10);
+ for (int i = 0; i < 5*n; i++)
+ tpe.execute(runRunnableDuJour);
+ } else {
+ for (int i = 0; i < 6*n; i++)
+ tpe.execute(runRunnableDuJour);
+ }
+
+ //report("submitted", tpe);
+ pumpedUp.await();
+ equal(tg.activeCount(), 3*n);
+ equal(tg.activeCount(), tpe.getMaximumPoolSize());
+ equal(tpe.getCorePoolSize(), n);
+ //report("pumped up", tpe);
+ equal(tpe.getMaximumPoolSize(), 3*n);
+ tpe.setMaximumPoolSize(4*n);
+ equal(tpe.getMaximumPoolSize(), 4*n);
+ //report("pumped up2", tpe);
+ final CyclicBarrier pumpedUp2 = new CyclicBarrier(n + 1);
+ runnableDuJour = waiter(pumpedUp2);
+ for (int i = 0; i < 1*n; i++)
+ tpe.execute(runRunnableDuJour);
+ pumpedUp2.await();
+ equal(tg.activeCount(), 4*n);
+ equal(tg.activeCount(), tpe.getMaximumPoolSize());
+ equal(tpe.getCompletedTaskCount(), 0L);
+ //report("pumped up2", tpe);
+ runnableDuJour = new Runnable() { public void run() {}};
+
+ tpe.setMaximumPoolSize(2*n);
+ //report("after set", tpe);
+
+ pumpedUp2.await();
+ pumpedUp.await();
+
+// while (tg.activeCount() != n &&
+// tg.activeCount() != n)
+// Thread.sleep(10);
+// equal(tg.activeCount(), n);
+// equal(tg.activeCount(), tpe.getCorePoolSize());
+
+ while (tg.activeCount() != 2*n &&
+ tg.activeCount() != 2*n)
+ Thread.sleep(10);
+ equal(tg.activeCount(), 2*n);
+ equal(tg.activeCount(), tpe.getMaximumPoolSize());
+
+
+//report("draining", tpe);
+ while (tpe.getCompletedTaskCount() < 7*n &&
+ tpe.getCompletedTaskCount() < 7*n)
+ Thread.sleep(10);
+
+ //equal(tg.activeCount(), n);
+ //equal(tg.activeCount(), tpe.getCorePoolSize());
+ equal(tg.activeCount(), 2*n);
+ equal(tg.activeCount(), tpe.getMaximumPoolSize());
+
+ equal(tpe.getTaskCount(), 7L*n);
+ equal(tpe.getCompletedTaskCount(), 7L*n);
+
+ equal(tpe.getKeepAliveTime(MINUTES), 3L);
+ tpe.setKeepAliveTime(7L, MILLISECONDS);
+ equal(tpe.getKeepAliveTime(MILLISECONDS), 7L);
+ while (tg.activeCount() > n &&
+ tg.activeCount() > n)
+ Thread.sleep(10);
+ equal(tg.activeCount(), n);
+
+ //report("idle", tpe);
+ check(! tpe.allowsCoreThreadTimeOut());
+ tpe.allowCoreThreadTimeOut(true);
+ check(tpe.allowsCoreThreadTimeOut());
+ while (tg.activeCount() > 0 &&
+ tg.activeCount() > 0)
+ Thread.sleep(10);
+ equal(tg.activeCount(), 0);
+
+ //report("idle", tpe);
+
+ tpe.shutdown();
+ checkShutdown(tpe);
+ check(tpe.awaitTermination(3L, MINUTES));
+ checkTerminated(tpe);
+ }
+
+ //--------------------- 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 static abstract class Fun {abstract void f() throws Throwable;}
+ static void THROWS(Class<? extends Throwable> k, Fun... fs) {
+ for (Fun f : fs)
+ try { f.f(); fail("Expected " + k.getName() + " not thrown"); }
+ catch (Throwable t) {
+ if (k.isAssignableFrom(t.getClass())) pass();
+ else unexpected(t);}}
+}