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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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* http://creativecommons.org/publicdomain/zero/1.0/ |
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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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import junit.framework.*; |
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import java.util.*; |
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import java.util.concurrent.*; |
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import static java.util.concurrent.TimeUnit.MILLISECONDS; |
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import java.util.concurrent.atomic.*; |
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import java.math.BigInteger; |
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import java.security.*; |
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import java.util.concurrent.ArrayBlockingQueue; |
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import java.util.concurrent.Callable; |
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import java.util.concurrent.ExecutorCompletionService; |
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import java.util.concurrent.Executors; |
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import java.util.concurrent.ExecutorService; |
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import java.util.concurrent.Future; |
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import java.util.concurrent.FutureTask; |
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import java.util.concurrent.RunnableFuture; |
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import java.util.concurrent.ThreadPoolExecutor; |
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import java.util.concurrent.TimeUnit; |
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import java.util.concurrent.atomic.AtomicBoolean; |
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import junit.framework.Test; |
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import junit.framework.TestSuite; |
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public class ExecutorCompletionServiceTest 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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junit.textui.TestRunner.run(suite()); |
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} |
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public static Test suite() { |
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return new TestSuite(ExecutorCompletionServiceTest.class); |
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} |
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/** |
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* Creating a new ECS with null Executor throw NPE |
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*/ |
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public void testConstructorNPE() { |
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try { |
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ExecutorCompletionService ecs = new ExecutorCompletionService(null); |
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new ExecutorCompletionService(null); |
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shouldThrow(); |
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} catch (NullPointerException success) {} |
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} |
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public void testConstructorNPE2() { |
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try { |
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ExecutorService e = Executors.newCachedThreadPool(); |
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ExecutorCompletionService ecs = new ExecutorCompletionService(e, null); |
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new ExecutorCompletionService(e, 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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* If poll returns non-null, the returned task is completed |
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*/ |
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public void testPoll1() throws InterruptedException { |
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public void testPoll1() throws Exception { |
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ExecutorService e = Executors.newCachedThreadPool(); |
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ExecutorCompletionService ecs = new ExecutorCompletionService(e); |
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try { |
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assertNull(ecs.poll()); |
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Callable c = new StringTask(); |
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ecs.submit(c); |
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Thread.sleep(SHORT_DELAY_MS); |
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for (;;) { |
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Future f = ecs.poll(); |
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if (f != null) { |
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assertTrue(f.isDone()); |
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break; |
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} |
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long startTime = System.nanoTime(); |
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Future f; |
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while ((f = ecs.poll()) == null) { |
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if (millisElapsedSince(startTime) > LONG_DELAY_MS) |
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fail("timed out"); |
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Thread.yield(); |
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} |
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assertTrue(f.isDone()); |
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assertSame(TEST_STRING, f.get()); |
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} finally { |
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joinPool(e); |
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} |
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joinPool(e); |
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} |
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} |
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/** |
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* Submitting to underlying AES that overrides newTaskFor(Callable) |
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* returns and eventually runs Future returned by newTaskFor. |
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*/ |
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public void testNewTaskForCallable() throws InterruptedException { |
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final AtomicBoolean done = new AtomicBoolean(false); |
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class MyCallableFuture<V> extends FutureTask<V> { |
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MyCallableFuture(Callable<V> c) { super(c); } |
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protected void done() { done.set(true); } |
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} |
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ExecutorService e = new ThreadPoolExecutor( |
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|
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/** |
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* Submitting to underlying AES that overrides newTaskFor(Callable) |
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* returns and eventually runs Future returned by newTaskFor. |
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*/ |
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public void testNewTaskForCallable() throws InterruptedException { |
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final AtomicBoolean done = new AtomicBoolean(false); |
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class MyCallableFuture<V> extends FutureTask<V> { |
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MyCallableFuture(Callable<V> c) { super(c); } |
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protected void done() { done.set(true); } |
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} |
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ExecutorService e = new ThreadPoolExecutor( |
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1, 1, 30L, TimeUnit.SECONDS, |
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new ArrayBlockingQueue<Runnable>(1)) { |
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protected <T> RunnableFuture<T> newTaskFor(Callable<T> c) { |
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return new MyCallableFuture<T>(c); |
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} |
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}; |
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ExecutorCompletionService<String> ecs = |
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new ExecutorCompletionService<String>(e); |
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try { |
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assertNull(ecs.poll()); |
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Callable<String> c = new StringTask(); |
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Future f1 = ecs.submit(c); |
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assertTrue("submit must return MyCallableFuture", |
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f1 instanceof MyCallableFuture); |
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Future f2 = ecs.take(); |
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assertSame("submit and take must return same objects", f1, f2); |
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assertTrue("completed task must have set done", done.get()); |
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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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* Submitting to underlying AES that overrides newTaskFor(Runnable,T) |
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* returns and eventually runs Future returned by newTaskFor. |
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*/ |
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public void testNewTaskForRunnable() throws InterruptedException { |
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final AtomicBoolean done = new AtomicBoolean(false); |
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class MyRunnableFuture<V> extends FutureTask<V> { |
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MyRunnableFuture(Runnable t, V r) { super(t, r); } |
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protected void done() { done.set(true); } |
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} |
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ExecutorService e = new ThreadPoolExecutor( |
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protected <T> RunnableFuture<T> newTaskFor(Callable<T> c) { |
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return new MyCallableFuture<T>(c); |
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}}; |
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ExecutorCompletionService<String> ecs = |
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new ExecutorCompletionService<String>(e); |
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try { |
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assertNull(ecs.poll()); |
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Callable<String> c = new StringTask(); |
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Future f1 = ecs.submit(c); |
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assertTrue("submit must return MyCallableFuture", |
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f1 instanceof MyCallableFuture); |
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Future f2 = ecs.take(); |
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assertSame("submit and take must return same objects", f1, f2); |
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assertTrue("completed task must have set done", done.get()); |
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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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* Submitting to underlying AES that overrides newTaskFor(Runnable,T) |
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* returns and eventually runs Future returned by newTaskFor. |
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*/ |
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public void testNewTaskForRunnable() throws InterruptedException { |
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final AtomicBoolean done = new AtomicBoolean(false); |
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class MyRunnableFuture<V> extends FutureTask<V> { |
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MyRunnableFuture(Runnable t, V r) { super(t, r); } |
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protected void done() { done.set(true); } |
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} |
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ExecutorService e = new ThreadPoolExecutor( |
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1, 1, 30L, TimeUnit.SECONDS, |
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new ArrayBlockingQueue<Runnable>(1)) { |
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protected <T> RunnableFuture<T> newTaskFor(Runnable t, T r) { |
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return new MyRunnableFuture<T>(t, r); |
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} |
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}; |
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ExecutorCompletionService<String> ecs = |
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new ExecutorCompletionService<String>(e); |
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try { |
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assertNull(ecs.poll()); |
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Runnable r = new NoOpRunnable(); |
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Future f1 = ecs.submit(r, null); |
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assertTrue("submit must return MyRunnableFuture", |
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f1 instanceof MyRunnableFuture); |
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Future f2 = ecs.take(); |
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assertSame("submit and take must return same objects", f1, f2); |
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assertTrue("completed task must have set done", done.get()); |
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} finally { |
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joinPool(e); |
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} |
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} |
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protected <T> RunnableFuture<T> newTaskFor(Runnable t, T r) { |
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return new MyRunnableFuture<T>(t, r); |
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}}; |
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ExecutorCompletionService<String> ecs = |
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new ExecutorCompletionService<String>(e); |
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try { |
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assertNull(ecs.poll()); |
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Runnable r = new NoOpRunnable(); |
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Future f1 = ecs.submit(r, null); |
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assertTrue("submit must return MyRunnableFuture", |
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f1 instanceof MyRunnableFuture); |
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Future f2 = ecs.take(); |
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assertSame("submit and take must return same objects", f1, f2); |
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assertTrue("completed task must have set done", done.get()); |
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} finally { |
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joinPool(e); |
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} |
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} |
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} |
