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*
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* 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).
*
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* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
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*/
/*
* @test
* @bug 6233235 6268386
* @summary Test allowsCoreThreadTimeOut
* @author Martin Buchholz
*/
import java.util.concurrent.*;
public class CoreThreadTimeOut {
static class IdentifiableThreadFactory implements ThreadFactory {
static ThreadFactory defaultThreadFactory
= Executors.defaultThreadFactory();
public Thread newThread(Runnable r) {
Thread t = defaultThreadFactory.newThread(r);
t.setName("CoreThreadTimeOut-" + t.getName());
return t;
}
}
int countExecutorThreads() {
Thread[] threads = new Thread[Thread.activeCount()+100];
Thread.enumerate(threads);
int count = 0;
for (Thread t : threads)
if (t != null &&
t.getName().matches
("CoreThreadTimeOut-pool-[0-9]+-thread-[0-9]+"))
count++;
return count;
}
long millisElapsedSince(long t0) {
return (System.nanoTime() - t0) / (1000L * 1000L);
}
void test(String[] args) throws Throwable {
final int threadCount = 10;
final int timeoutMillis = 30;
BlockingQueue<Runnable> q
= new ArrayBlockingQueue<Runnable>(2*threadCount);
ThreadPoolExecutor tpe
= new ThreadPoolExecutor(threadCount, threadCount,
timeoutMillis, TimeUnit.MILLISECONDS,
q, new IdentifiableThreadFactory());
equal(tpe.getCorePoolSize(), threadCount);
check(! tpe.allowsCoreThreadTimeOut());
tpe.allowCoreThreadTimeOut(true);
check(tpe.allowsCoreThreadTimeOut());
equal(countExecutorThreads(), 0);
long t0 = System.nanoTime();
for (int i = 0; i < threadCount; i++)
tpe.submit(new Runnable() { public void run() {}});
int count = countExecutorThreads();
if (millisElapsedSince(t0) < timeoutMillis)
equal(count, threadCount);
while (countExecutorThreads() > 0 &&
millisElapsedSince(t0) < 10 * 1000);
equal(countExecutorThreads(), 0);
tpe.shutdown();
check(tpe.allowsCoreThreadTimeOut());
check(tpe.awaitTermination(10, TimeUnit.SECONDS));
System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed);
if (failed > 0) throw new Exception("Some tests failed");
}
//--------------------- 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 CoreThreadTimeOut().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");}
}