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/* |
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* Written by Doug Lea with assistance from members of JCP JSR-166 |
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* Expert Group and released to the public domain, as explained at |
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* http://creativecommons.org/licenses/publicdomain |
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* Other contributors include Andrew Wright, Jeffrey Hayes, |
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* Pat Fisher, Mike Judd. |
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*/ |
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|
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|
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import junit.framework.*; |
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import java.util.*; |
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import java.util.concurrent.*; |
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import java.math.BigInteger; |
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import java.security.*; |
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|
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public class ExecutorsTest extends JSR166TestCase { |
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public static void main(String[] args) { |
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junit.textui.TestRunner.run (suite()); |
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} |
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public static Test suite() { |
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return new TestSuite(ExecutorsTest.class); |
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} |
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|
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static class TimedCallable<T> implements Callable<T> { |
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private final ExecutorService exec; |
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private final Callable<T> func; |
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private final long msecs; |
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|
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TimedCallable(ExecutorService exec, Callable<T> func, long msecs) { |
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this.exec = exec; |
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this.func = func; |
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this.msecs = msecs; |
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} |
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|
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public T call() throws Exception { |
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Future<T> ftask = exec.submit(func); |
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try { |
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return ftask.get(msecs, TimeUnit.MILLISECONDS); |
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} finally { |
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ftask.cancel(true); |
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} |
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} |
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} |
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|
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|
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private static class Fib implements Callable<BigInteger> { |
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private final BigInteger n; |
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Fib(long n) { |
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if (n < 0) throw new IllegalArgumentException("need non-negative arg, but got " + n); |
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this.n = BigInteger.valueOf(n); |
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} |
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public BigInteger call() { |
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BigInteger f1 = BigInteger.ONE; |
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BigInteger f2 = f1; |
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for (BigInteger i = BigInteger.ZERO; i.compareTo(n) < 0; i = i.add(BigInteger.ONE)) { |
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BigInteger t = f1.add(f2); |
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f1 = f2; |
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f2 = t; |
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} |
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return f1; |
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} |
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}; |
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|
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/** |
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* A newCachedThreadPool can execute runnables |
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*/ |
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public void testNewCachedThreadPool1() { |
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ExecutorService e = Executors.newCachedThreadPool(); |
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e.execute(new NoOpRunnable()); |
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e.execute(new NoOpRunnable()); |
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e.execute(new NoOpRunnable()); |
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joinPool(e); |
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} |
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|
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/** |
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* A newCachedThreadPool with given ThreadFactory can execute runnables |
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*/ |
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public void testNewCachedThreadPool2() { |
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ExecutorService e = Executors.newCachedThreadPool(new SimpleThreadFactory()); |
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e.execute(new NoOpRunnable()); |
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e.execute(new NoOpRunnable()); |
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e.execute(new NoOpRunnable()); |
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joinPool(e); |
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} |
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|
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/** |
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* A newCachedThreadPool with null ThreadFactory throws NPE |
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*/ |
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public void testNewCachedThreadPool3() { |
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try { |
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ExecutorService e = Executors.newCachedThreadPool(null); |
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shouldThrow(); |
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} catch (NullPointerException success) {} |
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} |
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|
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|
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/** |
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* A new SingleThreadExecutor can execute runnables |
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*/ |
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public void testNewSingleThreadExecutor1() { |
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ExecutorService e = Executors.newSingleThreadExecutor(); |
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e.execute(new NoOpRunnable()); |
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e.execute(new NoOpRunnable()); |
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e.execute(new NoOpRunnable()); |
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joinPool(e); |
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} |
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|
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/** |
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* A new SingleThreadExecutor with given ThreadFactory can execute runnables |
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*/ |
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public void testNewSingleThreadExecutor2() { |
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ExecutorService e = Executors.newSingleThreadExecutor(new SimpleThreadFactory()); |
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e.execute(new NoOpRunnable()); |
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e.execute(new NoOpRunnable()); |
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e.execute(new NoOpRunnable()); |
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joinPool(e); |
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} |
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|
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/** |
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* A new SingleThreadExecutor with null ThreadFactory throws NPE |
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*/ |
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public void testNewSingleThreadExecutor3() { |
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try { |
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ExecutorService e = Executors.newSingleThreadExecutor(null); |
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shouldThrow(); |
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} catch (NullPointerException success) {} |
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} |
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|
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/** |
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* A new SingleThreadExecutor cannot be casted to concrete implementation |
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*/ |
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public void testCastNewSingleThreadExecutor() { |
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ExecutorService e = Executors.newSingleThreadExecutor(); |
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try { |
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ThreadPoolExecutor tpe = (ThreadPoolExecutor)e; |
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shouldThrow(); |
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} catch (ClassCastException success) { |
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} finally { |
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joinPool(e); |
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} |
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} |
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|
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|
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/** |
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* A new newFixedThreadPool can execute runnables |
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*/ |
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public void testNewFixedThreadPool1() { |
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ExecutorService e = Executors.newFixedThreadPool(2); |
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e.execute(new NoOpRunnable()); |
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e.execute(new NoOpRunnable()); |
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e.execute(new NoOpRunnable()); |
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joinPool(e); |
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} |
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|
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/** |
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* A new newFixedThreadPool with given ThreadFactory can execute runnables |
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*/ |
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public void testNewFixedThreadPool2() { |
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ExecutorService e = Executors.newFixedThreadPool(2, new SimpleThreadFactory()); |
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e.execute(new NoOpRunnable()); |
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e.execute(new NoOpRunnable()); |
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e.execute(new NoOpRunnable()); |
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joinPool(e); |
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} |
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|
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/** |
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* A new newFixedThreadPool with null ThreadFactory throws NPE |
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*/ |
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public void testNewFixedThreadPool3() { |
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try { |
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ExecutorService e = Executors.newFixedThreadPool(2, null); |
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shouldThrow(); |
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} catch (NullPointerException success) {} |
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} |
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|
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/** |
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* A new newFixedThreadPool with 0 threads throws IAE |
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*/ |
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public void testNewFixedThreadPool4() { |
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try { |
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ExecutorService e = Executors.newFixedThreadPool(0); |
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shouldThrow(); |
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} catch (IllegalArgumentException success) {} |
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} |
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|
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|
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/** |
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* An unconfigurable newFixedThreadPool can execute runnables |
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*/ |
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public void testunconfigurableExecutorService() { |
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ExecutorService e = Executors.unconfigurableExecutorService(Executors.newFixedThreadPool(2)); |
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e.execute(new NoOpRunnable()); |
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e.execute(new NoOpRunnable()); |
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e.execute(new NoOpRunnable()); |
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joinPool(e); |
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} |
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|
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/** |
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* unconfigurableExecutorService(null) throws NPE |
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*/ |
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public void testunconfigurableExecutorServiceNPE() { |
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try { |
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ExecutorService e = Executors.unconfigurableExecutorService(null); |
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shouldThrow(); |
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} catch (NullPointerException success) {} |
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} |
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|
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/** |
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* unconfigurableScheduledExecutorService(null) throws NPE |
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*/ |
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public void testunconfigurableScheduledExecutorServiceNPE() { |
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try { |
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ExecutorService e = Executors.unconfigurableScheduledExecutorService(null); |
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shouldThrow(); |
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} catch (NullPointerException success) {} |
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} |
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|
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|
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/** |
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* a newSingleThreadScheduledExecutor successfully runs delayed task |
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*/ |
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public void testNewSingleThreadScheduledExecutor() throws Exception { |
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TrackedCallable callable = new TrackedCallable(); |
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ScheduledExecutorService p1 = Executors.newSingleThreadScheduledExecutor(); |
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Future f = p1.schedule(callable, SHORT_DELAY_MS, TimeUnit.MILLISECONDS); |
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assertFalse(callable.done); |
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Thread.sleep(MEDIUM_DELAY_MS); |
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assertTrue(callable.done); |
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assertEquals(Boolean.TRUE, f.get()); |
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joinPool(p1); |
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} |
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|
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/** |
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* a newScheduledThreadPool successfully runs delayed task |
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*/ |
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public void testnewScheduledThreadPool() throws Exception { |
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TrackedCallable callable = new TrackedCallable(); |
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ScheduledExecutorService p1 = Executors.newScheduledThreadPool(2); |
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Future f = p1.schedule(callable, SHORT_DELAY_MS, TimeUnit.MILLISECONDS); |
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assertFalse(callable.done); |
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Thread.sleep(MEDIUM_DELAY_MS); |
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assertTrue(callable.done); |
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assertEquals(Boolean.TRUE, f.get()); |
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joinPool(p1); |
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} |
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|
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/** |
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* an unconfigurable newScheduledThreadPool successfully runs delayed task |
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*/ |
250 |
public void testunconfigurableScheduledExecutorService() throws Exception { |
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TrackedCallable callable = new TrackedCallable(); |
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ScheduledExecutorService p1 = Executors.unconfigurableScheduledExecutorService(Executors.newScheduledThreadPool(2)); |
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Future f = p1.schedule(callable, SHORT_DELAY_MS, TimeUnit.MILLISECONDS); |
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assertFalse(callable.done); |
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Thread.sleep(MEDIUM_DELAY_MS); |
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assertTrue(callable.done); |
257 |
assertEquals(Boolean.TRUE, f.get()); |
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joinPool(p1); |
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} |
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|
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/** |
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* timeouts from execute will time out if they compute too long. |
263 |
*/ |
264 |
public void testTimedCallable() throws Exception { |
265 |
int N = 10000; |
266 |
ExecutorService executor = Executors.newSingleThreadExecutor(); |
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List<Callable<BigInteger>> tasks = new ArrayList<Callable<BigInteger>>(N); |
268 |
try { |
269 |
long startTime = System.currentTimeMillis(); |
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|
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long i = 0; |
272 |
while (tasks.size() < N) { |
273 |
tasks.add(new TimedCallable<BigInteger>(executor, new Fib(i), 1)); |
274 |
i += 10; |
275 |
} |
276 |
|
277 |
int iters = 0; |
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BigInteger sum = BigInteger.ZERO; |
279 |
for (Iterator<Callable<BigInteger>> it = tasks.iterator(); it.hasNext();) { |
280 |
try { |
281 |
++iters; |
282 |
sum = sum.add(it.next().call()); |
283 |
} |
284 |
catch (TimeoutException success) { |
285 |
assertTrue(iters > 0); |
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return; |
287 |
} |
288 |
} |
289 |
// if by chance we didn't ever time out, total time must be small |
290 |
long elapsed = System.currentTimeMillis() - startTime; |
291 |
assertTrue(elapsed < N); |
292 |
} |
293 |
finally { |
294 |
joinPool(executor); |
295 |
} |
296 |
} |
297 |
|
298 |
|
299 |
/** |
300 |
* ThreadPoolExecutor using defaultThreadFactory has |
301 |
* specified group, priority, daemon status, and name |
302 |
*/ |
303 |
public void testDefaultThreadFactory() throws Exception { |
304 |
final ThreadGroup egroup = Thread.currentThread().getThreadGroup(); |
305 |
Runnable r = new Runnable() { |
306 |
public void run() { |
307 |
try { |
308 |
Thread current = Thread.currentThread(); |
309 |
threadAssertTrue(!current.isDaemon()); |
310 |
threadAssertTrue(current.getPriority() <= Thread.NORM_PRIORITY); |
311 |
ThreadGroup g = current.getThreadGroup(); |
312 |
SecurityManager s = System.getSecurityManager(); |
313 |
if (s != null) |
314 |
threadAssertTrue(g == s.getThreadGroup()); |
315 |
else |
316 |
threadAssertTrue(g == egroup); |
317 |
String name = current.getName(); |
318 |
threadAssertTrue(name.endsWith("thread-1")); |
319 |
} catch (SecurityException ok) { |
320 |
// Also pass if not allowed to change setting |
321 |
} |
322 |
} |
323 |
}; |
324 |
ExecutorService e = Executors.newSingleThreadExecutor(Executors.defaultThreadFactory()); |
325 |
|
326 |
e.execute(r); |
327 |
try { |
328 |
e.shutdown(); |
329 |
} catch (SecurityException ok) { |
330 |
} |
331 |
|
332 |
try { |
333 |
Thread.sleep(SHORT_DELAY_MS); |
334 |
} finally { |
335 |
joinPool(e); |
336 |
} |
337 |
} |
338 |
|
339 |
/** |
340 |
* ThreadPoolExecutor using privilegedThreadFactory has |
341 |
* specified group, priority, daemon status, name, |
342 |
* access control context and context class loader |
343 |
*/ |
344 |
public void testPrivilegedThreadFactory() throws Exception { |
345 |
Policy savedPolicy = null; |
346 |
try { |
347 |
savedPolicy = Policy.getPolicy(); |
348 |
AdjustablePolicy policy = new AdjustablePolicy(); |
349 |
policy.addPermission(new RuntimePermission("getContextClassLoader")); |
350 |
policy.addPermission(new RuntimePermission("setContextClassLoader")); |
351 |
Policy.setPolicy(policy); |
352 |
} catch (AccessControlException ok) { |
353 |
return; |
354 |
} |
355 |
final ThreadGroup egroup = Thread.currentThread().getThreadGroup(); |
356 |
final ClassLoader thisccl = Thread.currentThread().getContextClassLoader(); |
357 |
final AccessControlContext thisacc = AccessController.getContext(); |
358 |
Runnable r = new Runnable() { |
359 |
public void run() { |
360 |
try { |
361 |
Thread current = Thread.currentThread(); |
362 |
threadAssertTrue(!current.isDaemon()); |
363 |
threadAssertTrue(current.getPriority() <= Thread.NORM_PRIORITY); |
364 |
ThreadGroup g = current.getThreadGroup(); |
365 |
SecurityManager s = System.getSecurityManager(); |
366 |
if (s != null) |
367 |
threadAssertTrue(g == s.getThreadGroup()); |
368 |
else |
369 |
threadAssertTrue(g == egroup); |
370 |
String name = current.getName(); |
371 |
threadAssertTrue(name.endsWith("thread-1")); |
372 |
threadAssertTrue(thisccl == current.getContextClassLoader()); |
373 |
threadAssertTrue(thisacc.equals(AccessController.getContext())); |
374 |
} catch (SecurityException ok) { |
375 |
// Also pass if not allowed to change settings |
376 |
} |
377 |
} |
378 |
}; |
379 |
ExecutorService e = Executors.newSingleThreadExecutor(Executors.privilegedThreadFactory()); |
380 |
|
381 |
Policy.setPolicy(savedPolicy); |
382 |
e.execute(r); |
383 |
try { |
384 |
e.shutdown(); |
385 |
} catch (SecurityException ok) { |
386 |
} |
387 |
try { |
388 |
Thread.sleep(SHORT_DELAY_MS); |
389 |
} finally { |
390 |
joinPool(e); |
391 |
} |
392 |
|
393 |
} |
394 |
|
395 |
void checkCCL() { |
396 |
SecurityManager sm = System.getSecurityManager(); |
397 |
if (sm != null) { |
398 |
sm.checkPermission(new RuntimePermission("setContextClassLoader")); |
399 |
sm.checkPermission(new RuntimePermission("getClassLoader")); |
400 |
} |
401 |
} |
402 |
|
403 |
class CheckCCL implements Callable<Object> { |
404 |
public Object call() { |
405 |
checkCCL(); |
406 |
return null; |
407 |
} |
408 |
} |
409 |
|
410 |
|
411 |
/** |
412 |
* Without class loader permissions, creating |
413 |
* privilegedCallableUsingCurrentClassLoader throws ACE |
414 |
*/ |
415 |
public void testCreatePrivilegedCallableUsingCCLWithNoPrivs() { |
416 |
Policy savedPolicy = null; |
417 |
try { |
418 |
savedPolicy = Policy.getPolicy(); |
419 |
AdjustablePolicy policy = new AdjustablePolicy(); |
420 |
Policy.setPolicy(policy); |
421 |
} catch (AccessControlException ok) { |
422 |
return; |
423 |
} |
424 |
|
425 |
// Check if program still has too many permissions to run test |
426 |
try { |
427 |
checkCCL(); |
428 |
// too many privileges to test; so return |
429 |
Policy.setPolicy(savedPolicy); |
430 |
return; |
431 |
} catch (AccessControlException ok) { |
432 |
} |
433 |
|
434 |
try { |
435 |
Callable task = Executors.privilegedCallableUsingCurrentClassLoader(new NoOpCallable()); |
436 |
shouldThrow(); |
437 |
} catch (AccessControlException success) { |
438 |
} finally { |
439 |
Policy.setPolicy(savedPolicy); |
440 |
} |
441 |
} |
442 |
|
443 |
/** |
444 |
* With class loader permissions, calling |
445 |
* privilegedCallableUsingCurrentClassLoader does not throw ACE |
446 |
*/ |
447 |
public void testprivilegedCallableUsingCCLWithPrivs() throws Exception { |
448 |
Policy savedPolicy = null; |
449 |
try { |
450 |
savedPolicy = Policy.getPolicy(); |
451 |
AdjustablePolicy policy = new AdjustablePolicy(); |
452 |
policy.addPermission(new RuntimePermission("getContextClassLoader")); |
453 |
policy.addPermission(new RuntimePermission("setContextClassLoader")); |
454 |
Policy.setPolicy(policy); |
455 |
} catch (AccessControlException ok) { |
456 |
return; |
457 |
} |
458 |
|
459 |
try { |
460 |
Callable task = Executors.privilegedCallableUsingCurrentClassLoader(new NoOpCallable()); |
461 |
task.call(); |
462 |
} |
463 |
finally { |
464 |
Policy.setPolicy(savedPolicy); |
465 |
} |
466 |
} |
467 |
|
468 |
/** |
469 |
* Without permissions, calling privilegedCallable throws ACE |
470 |
*/ |
471 |
public void testprivilegedCallableWithNoPrivs() throws Exception { |
472 |
Callable task; |
473 |
Policy savedPolicy = null; |
474 |
AdjustablePolicy policy = null; |
475 |
AccessControlContext noprivAcc = null; |
476 |
try { |
477 |
savedPolicy = Policy.getPolicy(); |
478 |
policy = new AdjustablePolicy(); |
479 |
Policy.setPolicy(policy); |
480 |
noprivAcc = AccessController.getContext(); |
481 |
task = Executors.privilegedCallable(new CheckCCL()); |
482 |
Policy.setPolicy(savedPolicy); |
483 |
} catch (AccessControlException ok) { |
484 |
return; // program has too few permissions to set up test |
485 |
} |
486 |
|
487 |
// Make sure that program doesn't have too many permissions |
488 |
try { |
489 |
AccessController.doPrivileged(new PrivilegedAction() { |
490 |
public Object run() { |
491 |
checkCCL(); |
492 |
return null; |
493 |
}}, noprivAcc); |
494 |
// too many permssions; skip test |
495 |
return; |
496 |
} catch (AccessControlException ok) { |
497 |
} |
498 |
|
499 |
try { |
500 |
task.call(); |
501 |
shouldThrow(); |
502 |
} catch (AccessControlException success) {} |
503 |
} |
504 |
|
505 |
/** |
506 |
* With permissions, calling privilegedCallable succeeds |
507 |
*/ |
508 |
public void testprivilegedCallableWithPrivs() throws Exception { |
509 |
Policy savedPolicy = null; |
510 |
try { |
511 |
savedPolicy = Policy.getPolicy(); |
512 |
AdjustablePolicy policy = new AdjustablePolicy(); |
513 |
policy.addPermission(new RuntimePermission("getContextClassLoader")); |
514 |
policy.addPermission(new RuntimePermission("setContextClassLoader")); |
515 |
Policy.setPolicy(policy); |
516 |
} catch (AccessControlException ok) { |
517 |
return; |
518 |
} |
519 |
|
520 |
Callable task = Executors.privilegedCallable(new CheckCCL()); |
521 |
try { |
522 |
task.call(); |
523 |
} finally { |
524 |
Policy.setPolicy(savedPolicy); |
525 |
} |
526 |
} |
527 |
|
528 |
/** |
529 |
* callable(Runnable) returns null when called |
530 |
*/ |
531 |
public void testCallable1() throws Exception { |
532 |
Callable c = Executors.callable(new NoOpRunnable()); |
533 |
assertNull(c.call()); |
534 |
} |
535 |
|
536 |
/** |
537 |
* callable(Runnable, result) returns result when called |
538 |
*/ |
539 |
public void testCallable2() throws Exception { |
540 |
Callable c = Executors.callable(new NoOpRunnable(), one); |
541 |
assertEquals(one, c.call()); |
542 |
} |
543 |
|
544 |
/** |
545 |
* callable(PrivilegedAction) returns its result when called |
546 |
*/ |
547 |
public void testCallable3() throws Exception { |
548 |
Callable c = Executors.callable(new PrivilegedAction() { |
549 |
public Object run() { return one; }}); |
550 |
assertEquals(one, c.call()); |
551 |
} |
552 |
|
553 |
/** |
554 |
* callable(PrivilegedExceptionAction) returns its result when called |
555 |
*/ |
556 |
public void testCallable4() throws Exception { |
557 |
Callable c = Executors.callable(new PrivilegedExceptionAction() { |
558 |
public Object run() { return one; }}); |
559 |
assertEquals(one, c.call()); |
560 |
} |
561 |
|
562 |
|
563 |
/** |
564 |
* callable(null Runnable) throws NPE |
565 |
*/ |
566 |
public void testCallableNPE1() { |
567 |
try { |
568 |
Callable c = Executors.callable((Runnable) null); |
569 |
shouldThrow(); |
570 |
} catch (NullPointerException success) {} |
571 |
} |
572 |
|
573 |
/** |
574 |
* callable(null, result) throws NPE |
575 |
*/ |
576 |
public void testCallableNPE2() { |
577 |
try { |
578 |
Callable c = Executors.callable((Runnable) null, one); |
579 |
shouldThrow(); |
580 |
} catch (NullPointerException success) {} |
581 |
} |
582 |
|
583 |
/** |
584 |
* callable(null PrivilegedAction) throws NPE |
585 |
*/ |
586 |
public void testCallableNPE3() { |
587 |
try { |
588 |
Callable c = Executors.callable((PrivilegedAction) null); |
589 |
shouldThrow(); |
590 |
} catch (NullPointerException success) {} |
591 |
} |
592 |
|
593 |
/** |
594 |
* callable(null PrivilegedExceptionAction) throws NPE |
595 |
*/ |
596 |
public void testCallableNPE4() { |
597 |
try { |
598 |
Callable c = Executors.callable((PrivilegedExceptionAction) null); |
599 |
shouldThrow(); |
600 |
} catch (NullPointerException success) {} |
601 |
} |
602 |
|
603 |
|
604 |
} |