/*
* 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<PublicFutureTask>();
final AtomicReference<PublicFutureTask> abnormalRef
= new AtomicReference<PublicFutureTask>();
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");}
}