diff -r fd16c54261b3 -r 90ce3da70b43 jdk/test/java/util/concurrent/ThreadPoolExecutor/ConfigChanges.java --- /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(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 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);}} +}