| /* |
| * 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. |
| */ |
| |
| /* |
| * This file is available under and governed by the GNU General Public |
| * License version 2 only, as published by the Free Software Foundation. |
| * However, the following notice accompanied the original version of this |
| * file: |
| * |
| * Written by Martin Buchholz with assistance from members of JCP JSR-166 |
| * Expert Group and released to the public domain, as explained at |
| * http://creativecommons.org/publicdomain/zero/1.0/ |
| */ |
| |
| /* |
| * @test |
| * @run main DoneTimedGetLoops 300 |
| * @summary isDone returning true guarantees that subsequent timed get |
| * will never throw TimeoutException. |
| */ |
| |
| import java.util.concurrent.ExecutionException; |
| import java.util.concurrent.FutureTask; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.atomic.AtomicReference; |
| |
| @SuppressWarnings({"unchecked", "rawtypes", "deprecation"}) |
| public class DoneTimedGetLoops { |
| final long testDurationMillisDefault = 10L * 1000L; |
| final long testDurationMillis; |
| |
| static class PublicFutureTask extends FutureTask<Boolean> { |
| static final Runnable noop = new Runnable() { public void run() {} }; |
| PublicFutureTask() { super(noop, null); } |
| public void set(Boolean v) { super.set(v); } |
| public void setException(Throwable t) { super.setException(t); } |
| } |
| |
| DoneTimedGetLoops(String[] args) { |
| testDurationMillis = (args.length > 0) ? |
| Long.valueOf(args[0]) : testDurationMillisDefault; |
| } |
| |
| void test(String[] args) throws Throwable { |
| final long testDurationNanos = testDurationMillis * 1000L * 1000L; |
| final long quittingTimeNanos = System.nanoTime() + testDurationNanos; |
| final long timeoutMillis = 10L * 1000L; |
| |
| final AtomicReference<PublicFutureTask> normalRef |
| = new AtomicReference<>(); |
| final AtomicReference<PublicFutureTask> abnormalRef |
| = new AtomicReference<>(); |
| |
| final Throwable throwable = new Throwable(); |
| |
| abstract class CheckedThread extends Thread { |
| CheckedThread(String name) { |
| super(name); |
| setDaemon(true); |
| start(); |
| } |
| /** Polls for quitting time. */ |
| protected boolean quittingTime() { |
| return System.nanoTime() - quittingTimeNanos > 0; |
| } |
| /** Polls occasionally for quitting time. */ |
| protected boolean quittingTime(long i) { |
| return (i % 1024) == 0 && quittingTime(); |
| } |
| protected abstract void realRun() throws Exception; |
| public void run() { |
| try { realRun(); } catch (Throwable t) { unexpected(t); } |
| } |
| } |
| |
| Thread setter = new CheckedThread("setter") { |
| protected void realRun() { |
| while (! quittingTime()) { |
| PublicFutureTask future = new PublicFutureTask(); |
| normalRef.set(future); |
| future.set(Boolean.TRUE); |
| }}}; |
| |
| Thread setterException = new CheckedThread("setterException") { |
| protected void realRun() { |
| while (! quittingTime()) { |
| PublicFutureTask future = new PublicFutureTask(); |
| abnormalRef.set(future); |
| future.setException(throwable); |
| }}}; |
| |
| Thread doneTimedGetNormal = new CheckedThread("doneTimedGetNormal") { |
| protected void realRun() throws Exception { |
| while (! quittingTime()) { |
| PublicFutureTask future = normalRef.get(); |
| if (future != null) { |
| while (!future.isDone()) |
| ; |
| check(future.get(0L, TimeUnit.HOURS) == Boolean.TRUE); |
| }}}}; |
| |
| Thread doneTimedGetAbnormal = new CheckedThread("doneTimedGetAbnormal") { |
| protected void realRun() throws Exception { |
| while (! quittingTime()) { |
| PublicFutureTask future = abnormalRef.get(); |
| if (future != null) { |
| while (!future.isDone()) |
| ; |
| try { future.get(0L, TimeUnit.HOURS); fail(); } |
| catch (ExecutionException t) { |
| check(t.getCause() == throwable); |
| } |
| }}}}; |
| |
| for (Thread thread : new Thread[] { |
| setter, |
| setterException, |
| doneTimedGetNormal, |
| doneTimedGetAbnormal }) { |
| thread.join(timeoutMillis + testDurationMillis); |
| if (thread.isAlive()) { |
| System.err.printf("Hung thread: %s%n", thread.getName()); |
| failed++; |
| for (StackTraceElement e : thread.getStackTrace()) |
| System.err.println(e); |
| thread.join(timeoutMillis); |
| } |
| } |
| } |
| |
| //--------------------- Infrastructure --------------------------- |
| volatile int passed = 0, failed = 0; |
| void pass() {passed++;} |
| void fail() {failed++; Thread.dumpStack();} |
| void fail(String msg) {System.err.println(msg); fail();} |
| void unexpected(Throwable t) {failed++; t.printStackTrace();} |
| void check(boolean cond) {if (cond) pass(); else fail();} |
| 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 { |
| new DoneTimedGetLoops(args).instanceMain(args);} |
| public void instanceMain(String[] args) throws Throwable { |
| try {test(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");} |
| } |