test/tck/ExecutorCompletionServiceTest.java

/*
 * Written by Doug Lea 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/
 * Other contributors include Andrew Wright, Jeffrey Hayes,
 * Pat Fisher, Mike Judd.
 */

import static java.util.concurrent.TimeUnit.MILLISECONDS;

import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutorCompletionService;
import java.util.concurrent.Executors;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Future;
import java.util.concurrent.FutureTask;
import java.util.concurrent.RunnableFuture;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicBoolean;

import junit.framework.Test;
import junit.framework.TestSuite;

public class ExecutorCompletionServiceTest extends JSR166TestCase {
    public static void main(String[] args) {
        main(suite(), args);
    }
    public static Test suite() {
        return new TestSuite(ExecutorCompletionServiceTest.class);
    }

    /**
     * Creating a new ECS with null Executor throw NPE
     */
    public void testConstructorNPE() {
        try {
            new ExecutorCompletionService(null);
            shouldThrow();
        } catch (NullPointerException success) {}
    }

    /**
     * Creating a new ECS with null queue throw NPE
     */
    public void testConstructorNPE2() {
        try {
            ExecutorService e = Executors.newCachedThreadPool();
            new ExecutorCompletionService(e, null);
            shouldThrow();
        } catch (NullPointerException success) {}
    }

    /**
     * Submitting a null callable throws NPE
     */
    public void testSubmitNPE() {
        ExecutorService e = Executors.newCachedThreadPool();
        ExecutorCompletionService ecs = new ExecutorCompletionService(e);
        try {
            Callable c = null;
            ecs.submit(c);
            shouldThrow();
        } catch (NullPointerException success) {
        } finally {
            joinPool(e);
        }
    }

    /**
     * Submitting a null runnable throws NPE
     */
    public void testSubmitNPE2() {
        ExecutorService e = Executors.newCachedThreadPool();
        ExecutorCompletionService ecs = new ExecutorCompletionService(e);
        try {
            Runnable r = null;
            ecs.submit(r, Boolean.TRUE);
            shouldThrow();
        } catch (NullPointerException success) {
        } finally {
            joinPool(e);
        }
    }

    /**
     * A taken submitted task is completed
     */
    public void testTake() throws InterruptedException {
        ExecutorService e = Executors.newCachedThreadPool();
        ExecutorCompletionService ecs = new ExecutorCompletionService(e);
        try {
            Callable c = new StringTask();
            ecs.submit(c);
            Future f = ecs.take();
            assertTrue(f.isDone());
        } finally {
            joinPool(e);
        }
    }

    /**
     * Take returns the same future object returned by submit
     */
    public void testTake2() throws InterruptedException {
        ExecutorService e = Executors.newCachedThreadPool();
        ExecutorCompletionService ecs = new ExecutorCompletionService(e);
        try {
            Callable c = new StringTask();
            Future f1 = ecs.submit(c);
            Future f2 = ecs.take();
            assertSame(f1, f2);
        } finally {
            joinPool(e);
        }
    }

    /**
     * If poll returns non-null, the returned task is completed
     */
    public void testPoll1() throws Exception {
        ExecutorService e = Executors.newCachedThreadPool();
        ExecutorCompletionService ecs = new ExecutorCompletionService(e);
        try {
            assertNull(ecs.poll());
            Callable c = new StringTask();
            ecs.submit(c);

            long startTime = System.nanoTime();
            Future f;
            while ((f = ecs.poll()) == null) {
                if (millisElapsedSince(startTime) > LONG_DELAY_MS)
                    fail("timed out");
                Thread.yield();
            }
            assertTrue(f.isDone());
            assertSame(TEST_STRING, f.get());
        } finally {
            joinPool(e);
        }
    }

    /**
     * If timed poll returns non-null, the returned task is completed
     */
    public void testPoll2() throws InterruptedException {
        ExecutorService e = Executors.newCachedThreadPool();
        ExecutorCompletionService ecs = new ExecutorCompletionService(e);
        try {
            assertNull(ecs.poll());
            Callable c = new StringTask();
            ecs.submit(c);
            Future f = ecs.poll(SHORT_DELAY_MS, MILLISECONDS);
            if (f != null)
                assertTrue(f.isDone());
        } finally {
            joinPool(e);
        }
    }

    /**
     * Submitting to underlying AES that overrides newTaskFor(Callable)
     * returns and eventually runs Future returned by newTaskFor.
     */
    public void testNewTaskForCallable() throws InterruptedException {
        final AtomicBoolean done = new AtomicBoolean(false);
        class MyCallableFuture<V> extends FutureTask<V> {
            MyCallableFuture(Callable<V> c) { super(c); }
            protected void done() { done.set(true); }
        }
        ExecutorService e = new ThreadPoolExecutor(
                                 1, 1, 30L, TimeUnit.SECONDS,
                                 new ArrayBlockingQueue<Runnable>(1)) {
            protected <T> RunnableFuture<T> newTaskFor(Callable<T> c) {
                return new MyCallableFuture<T>(c);
            }};
        ExecutorCompletionService<String> ecs =
            new ExecutorCompletionService<String>(e);
        try {
            assertNull(ecs.poll());
            Callable<String> c = new StringTask();
            Future f1 = ecs.submit(c);
            assertTrue("submit must return MyCallableFuture",
                       f1 instanceof MyCallableFuture);
            Future f2 = ecs.take();
            assertSame("submit and take must return same objects", f1, f2);
            assertTrue("completed task must have set done", done.get());
        } finally {
            joinPool(e);
        }
    }

    /**
     * Submitting to underlying AES that overrides newTaskFor(Runnable,T)
     * returns and eventually runs Future returned by newTaskFor.
     */
    public void testNewTaskForRunnable() throws InterruptedException {
        final AtomicBoolean done = new AtomicBoolean(false);
        class MyRunnableFuture<V> extends FutureTask<V> {
            MyRunnableFuture(Runnable t, V r) { super(t, r); }
            protected void done() { done.set(true); }
        }
        ExecutorService e = new ThreadPoolExecutor(
                                 1, 1, 30L, TimeUnit.SECONDS,
                                 new ArrayBlockingQueue<Runnable>(1)) {
            protected <T> RunnableFuture<T> newTaskFor(Runnable t, T r) {
                return new MyRunnableFuture<T>(t, r);
            }};
        ExecutorCompletionService<String> ecs =
            new ExecutorCompletionService<String>(e);
        try {
            assertNull(ecs.poll());
            Runnable r = new NoOpRunnable();
            Future f1 = ecs.submit(r, null);
            assertTrue("submit must return MyRunnableFuture",
                       f1 instanceof MyRunnableFuture);
            Future f2 = ecs.take();
            assertSame("submit and take must return same objects", f1, f2);
            assertTrue("completed task must have set done", done.get());
        } finally {
            joinPool(e);
        }
    }

}
Revision:	1.21
Committed:	Sat Apr 25 04:55:30 2015 UTC (9 years ago) by jsr166
Branch:	MAIN
Changes since 1.20:	+1 -1 lines
Log Message:	improve main methods; respect system properties; actually fail if a test fails
#	Content
1	/*
2	* Written by Doug Lea with assistance from members of JCP JSR-166
3	* Expert Group and released to the public domain, as explained at
4	* http://creativecommons.org/publicdomain/zero/1.0/
5	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	* Pat Fisher, Mike Judd.
7	*/
8
9	import static java.util.concurrent.TimeUnit.MILLISECONDS;
10
11	import java.util.concurrent.ArrayBlockingQueue;
12	import java.util.concurrent.Callable;
13	import java.util.concurrent.ExecutorCompletionService;
14	import java.util.concurrent.Executors;
15	import java.util.concurrent.ExecutorService;
16	import java.util.concurrent.Future;
17	import java.util.concurrent.FutureTask;
18	import java.util.concurrent.RunnableFuture;
19	import java.util.concurrent.ThreadPoolExecutor;
20	import java.util.concurrent.TimeUnit;
21	import java.util.concurrent.atomic.AtomicBoolean;
22
23	import junit.framework.Test;
24	import junit.framework.TestSuite;
25
26	public class ExecutorCompletionServiceTest extends JSR166TestCase {
27	public static void main(String[] args) {
28	main(suite(), args);
29	}
30	public static Test suite() {
31	return new TestSuite(ExecutorCompletionServiceTest.class);
32	}
33
34	/**
35	* Creating a new ECS with null Executor throw NPE
36	*/
37	public void testConstructorNPE() {
38	try {
39	new ExecutorCompletionService(null);
40	shouldThrow();
41	} catch (NullPointerException success) {}
42	}
43
44	/**
45	* Creating a new ECS with null queue throw NPE
46	*/
47	public void testConstructorNPE2() {
48	try {
49	ExecutorService e = Executors.newCachedThreadPool();
50	new ExecutorCompletionService(e, null);
51	shouldThrow();
52	} catch (NullPointerException success) {}
53	}
54
55	/**
56	* Submitting a null callable throws NPE
57	*/
58	public void testSubmitNPE() {
59	ExecutorService e = Executors.newCachedThreadPool();
60	ExecutorCompletionService ecs = new ExecutorCompletionService(e);
61	try {
62	Callable c = null;
63	ecs.submit(c);
64	shouldThrow();
65	} catch (NullPointerException success) {
66	} finally {
67	joinPool(e);
68	}
69	}
70
71	/**
72	* Submitting a null runnable throws NPE
73	*/
74	public void testSubmitNPE2() {
75	ExecutorService e = Executors.newCachedThreadPool();
76	ExecutorCompletionService ecs = new ExecutorCompletionService(e);
77	try {
78	Runnable r = null;
79	ecs.submit(r, Boolean.TRUE);
80	shouldThrow();
81	} catch (NullPointerException success) {
82	} finally {
83	joinPool(e);
84	}
85	}
86
87	/**
88	* A taken submitted task is completed
89	*/
90	public void testTake() throws InterruptedException {
91	ExecutorService e = Executors.newCachedThreadPool();
92	ExecutorCompletionService ecs = new ExecutorCompletionService(e);
93	try {
94	Callable c = new StringTask();
95	ecs.submit(c);
96	Future f = ecs.take();
97	assertTrue(f.isDone());
98	} finally {
99	joinPool(e);
100	}
101	}
102
103	/**
104	* Take returns the same future object returned by submit
105	*/
106	public void testTake2() throws InterruptedException {
107	ExecutorService e = Executors.newCachedThreadPool();
108	ExecutorCompletionService ecs = new ExecutorCompletionService(e);
109	try {
110	Callable c = new StringTask();
111	Future f1 = ecs.submit(c);
112	Future f2 = ecs.take();
113	assertSame(f1, f2);
114	} finally {
115	joinPool(e);
116	}
117	}
118
119	/**
120	* If poll returns non-null, the returned task is completed
121	*/
122	public void testPoll1() throws Exception {
123	ExecutorService e = Executors.newCachedThreadPool();
124	ExecutorCompletionService ecs = new ExecutorCompletionService(e);
125	try {
126	assertNull(ecs.poll());
127	Callable c = new StringTask();
128	ecs.submit(c);
129
130	long startTime = System.nanoTime();
131	Future f;
132	while ((f = ecs.poll()) == null) {
133	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
134	fail("timed out");
135	Thread.yield();
136	}
137	assertTrue(f.isDone());
138	assertSame(TEST_STRING, f.get());
139	} finally {
140	joinPool(e);
141	}
142	}
143
144	/**
145	* If timed poll returns non-null, the returned task is completed
146	*/
147	public void testPoll2() throws InterruptedException {
148	ExecutorService e = Executors.newCachedThreadPool();
149	ExecutorCompletionService ecs = new ExecutorCompletionService(e);
150	try {
151	assertNull(ecs.poll());
152	Callable c = new StringTask();
153	ecs.submit(c);
154	Future f = ecs.poll(SHORT_DELAY_MS, MILLISECONDS);
155	if (f != null)
156	assertTrue(f.isDone());
157	} finally {
158	joinPool(e);
159	}
160	}
161
162	/**
163	* Submitting to underlying AES that overrides newTaskFor(Callable)
164	* returns and eventually runs Future returned by newTaskFor.
165	*/
166	public void testNewTaskForCallable() throws InterruptedException {
167	final AtomicBoolean done = new AtomicBoolean(false);
168	class MyCallableFuture<V> extends FutureTask<V> {
169	MyCallableFuture(Callable<V> c) { super(c); }
170	protected void done() { done.set(true); }
171	}
172	ExecutorService e = new ThreadPoolExecutor(
173	1, 1, 30L, TimeUnit.SECONDS,
174	new ArrayBlockingQueue<Runnable>(1)) {
175	protected <T> RunnableFuture<T> newTaskFor(Callable<T> c) {
176	return new MyCallableFuture<T>(c);
177	}};
178	ExecutorCompletionService<String> ecs =
179	new ExecutorCompletionService<String>(e);
180	try {
181	assertNull(ecs.poll());
182	Callable<String> c = new StringTask();
183	Future f1 = ecs.submit(c);
184	assertTrue("submit must return MyCallableFuture",
185	f1 instanceof MyCallableFuture);
186	Future f2 = ecs.take();
187	assertSame("submit and take must return same objects", f1, f2);
188	assertTrue("completed task must have set done", done.get());
189	} finally {
190	joinPool(e);
191	}
192	}
193
194	/**
195	* Submitting to underlying AES that overrides newTaskFor(Runnable,T)
196	* returns and eventually runs Future returned by newTaskFor.
197	*/
198	public void testNewTaskForRunnable() throws InterruptedException {
199	final AtomicBoolean done = new AtomicBoolean(false);
200	class MyRunnableFuture<V> extends FutureTask<V> {
201	MyRunnableFuture(Runnable t, V r) { super(t, r); }
202	protected void done() { done.set(true); }
203	}
204	ExecutorService e = new ThreadPoolExecutor(
205	1, 1, 30L, TimeUnit.SECONDS,
206	new ArrayBlockingQueue<Runnable>(1)) {
207	protected <T> RunnableFuture<T> newTaskFor(Runnable t, T r) {
208	return new MyRunnableFuture<T>(t, r);
209	}};
210	ExecutorCompletionService<String> ecs =
211	new ExecutorCompletionService<String>(e);
212	try {
213	assertNull(ecs.poll());
214	Runnable r = new NoOpRunnable();
215	Future f1 = ecs.submit(r, null);
216	assertTrue("submit must return MyRunnableFuture",
217	f1 instanceof MyRunnableFuture);
218	Future f2 = ecs.take();
219	assertSame("submit and take must return same objects", f1, f2);
220	assertTrue("completed task must have set done", done.get());
221	} finally {
222	joinPool(e);
223	}
224	}
225
226	}