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 junit.framework.*;
import java.util.*;
import java.util.concurrent.*;
import static java.util.concurrent.TimeUnit.MILLISECONDS;
import java.util.concurrent.atomic.*;
import java.math.BigInteger;
import java.security.*;

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

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

    /**
     * Creating a new ECS with null queue throw NPE
     */
    public void testConstructorNPE2() {
        try {
            ExecutorService e = Executors.newCachedThreadPool();
            ExecutorCompletionService ecs = 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 InterruptedException {
        ExecutorService e = Executors.newCachedThreadPool();
        ExecutorCompletionService ecs = new ExecutorCompletionService(e);
        try {
            assertNull(ecs.poll());
            Callable c = new StringTask();
            ecs.submit(c);
            delay(SHORT_DELAY_MS);
            for (;;) {
                Future f = ecs.poll();
                if (f != null) {
                    assertTrue(f.isDone());
                    break;
                }
            }
        } 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:	1.15
Committed:	Fri May 27 19:42:42 2011 UTC (12 years, 11 months ago) by jsr166
Branch:	MAIN
Changes since 1.14:	+0 -2 lines
Log Message:	whitespace
#	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 junit.framework.*;
10	import java.util.*;
11	import java.util.concurrent.*;
12	import static java.util.concurrent.TimeUnit.MILLISECONDS;
13	import java.util.concurrent.atomic.*;
14	import java.math.BigInteger;
15	import java.security.*;
16
17	public class ExecutorCompletionServiceTest extends JSR166TestCase {
18	public static void main(String[] args) {
19	junit.textui.TestRunner.run(suite());
20	}
21	public static Test suite() {
22	return new TestSuite(ExecutorCompletionServiceTest.class);
23	}
24
25	/**
26	* Creating a new ECS with null Executor throw NPE
27	*/
28	public void testConstructorNPE() {
29	try {
30	ExecutorCompletionService ecs = new ExecutorCompletionService(null);
31	shouldThrow();
32	} catch (NullPointerException success) {}
33	}
34
35	/**
36	* Creating a new ECS with null queue throw NPE
37	*/
38	public void testConstructorNPE2() {
39	try {
40	ExecutorService e = Executors.newCachedThreadPool();
41	ExecutorCompletionService ecs = new ExecutorCompletionService(e, null);
42	shouldThrow();
43	} catch (NullPointerException success) {}
44	}
45
46	/**
47	* Submitting a null callable throws NPE
48	*/
49	public void testSubmitNPE() {
50	ExecutorService e = Executors.newCachedThreadPool();
51	ExecutorCompletionService ecs = new ExecutorCompletionService(e);
52	try {
53	Callable c = null;
54	ecs.submit(c);
55	shouldThrow();
56	} catch (NullPointerException success) {
57	} finally {
58	joinPool(e);
59	}
60	}
61
62	/**
63	* Submitting a null runnable throws NPE
64	*/
65	public void testSubmitNPE2() {
66	ExecutorService e = Executors.newCachedThreadPool();
67	ExecutorCompletionService ecs = new ExecutorCompletionService(e);
68	try {
69	Runnable r = null;
70	ecs.submit(r, Boolean.TRUE);
71	shouldThrow();
72	} catch (NullPointerException success) {
73	} finally {
74	joinPool(e);
75	}
76	}
77
78	/**
79	* A taken submitted task is completed
80	*/
81	public void testTake() throws InterruptedException {
82	ExecutorService e = Executors.newCachedThreadPool();
83	ExecutorCompletionService ecs = new ExecutorCompletionService(e);
84	try {
85	Callable c = new StringTask();
86	ecs.submit(c);
87	Future f = ecs.take();
88	assertTrue(f.isDone());
89	} finally {
90	joinPool(e);
91	}
92	}
93
94	/**
95	* Take returns the same future object returned by submit
96	*/
97	public void testTake2() throws InterruptedException {
98	ExecutorService e = Executors.newCachedThreadPool();
99	ExecutorCompletionService ecs = new ExecutorCompletionService(e);
100	try {
101	Callable c = new StringTask();
102	Future f1 = ecs.submit(c);
103	Future f2 = ecs.take();
104	assertSame(f1, f2);
105	} finally {
106	joinPool(e);
107	}
108	}
109
110	/**
111	* If poll returns non-null, the returned task is completed
112	*/
113	public void testPoll1() throws InterruptedException {
114	ExecutorService e = Executors.newCachedThreadPool();
115	ExecutorCompletionService ecs = new ExecutorCompletionService(e);
116	try {
117	assertNull(ecs.poll());
118	Callable c = new StringTask();
119	ecs.submit(c);
120	delay(SHORT_DELAY_MS);
121	for (;;) {
122	Future f = ecs.poll();
123	if (f != null) {
124	assertTrue(f.isDone());
125	break;
126	}
127	}
128	} finally {
129	joinPool(e);
130	}
131	}
132
133	/**
134	* If timed poll returns non-null, the returned task is completed
135	*/
136	public void testPoll2() throws InterruptedException {
137	ExecutorService e = Executors.newCachedThreadPool();
138	ExecutorCompletionService ecs = new ExecutorCompletionService(e);
139	try {
140	assertNull(ecs.poll());
141	Callable c = new StringTask();
142	ecs.submit(c);
143	Future f = ecs.poll(SHORT_DELAY_MS, MILLISECONDS);
144	if (f != null)
145	assertTrue(f.isDone());
146	} finally {
147	joinPool(e);
148	}
149	}
150
151	/**
152	* Submitting to underlying AES that overrides newTaskFor(Callable)
153	* returns and eventually runs Future returned by newTaskFor.
154	*/
155	public void testNewTaskForCallable() throws InterruptedException {
156	final AtomicBoolean done = new AtomicBoolean(false);
157	class MyCallableFuture<V> extends FutureTask<V> {
158	MyCallableFuture(Callable<V> c) { super(c); }
159	protected void done() { done.set(true); }
160	}
161	ExecutorService e = new ThreadPoolExecutor(
162	1, 1, 30L, TimeUnit.SECONDS,
163	new ArrayBlockingQueue<Runnable>(1)) {
164	protected <T> RunnableFuture<T> newTaskFor(Callable<T> c) {
165	return new MyCallableFuture<T>(c);
166	}};
167	ExecutorCompletionService<String> ecs =
168	new ExecutorCompletionService<String>(e);
169	try {
170	assertNull(ecs.poll());
171	Callable<String> c = new StringTask();
172	Future f1 = ecs.submit(c);
173	assertTrue("submit must return MyCallableFuture",
174	f1 instanceof MyCallableFuture);
175	Future f2 = ecs.take();
176	assertSame("submit and take must return same objects", f1, f2);
177	assertTrue("completed task must have set done", done.get());
178	} finally {
179	joinPool(e);
180	}
181	}
182
183	/**
184	* Submitting to underlying AES that overrides newTaskFor(Runnable,T)
185	* returns and eventually runs Future returned by newTaskFor.
186	*/
187	public void testNewTaskForRunnable() throws InterruptedException {
188	final AtomicBoolean done = new AtomicBoolean(false);
189	class MyRunnableFuture<V> extends FutureTask<V> {
190	MyRunnableFuture(Runnable t, V r) { super(t, r); }
191	protected void done() { done.set(true); }
192	}
193	ExecutorService e = new ThreadPoolExecutor(
194	1, 1, 30L, TimeUnit.SECONDS,
195	new ArrayBlockingQueue<Runnable>(1)) {
196	protected <T> RunnableFuture<T> newTaskFor(Runnable t, T r) {
197	return new MyRunnableFuture<T>(t, r);
198	}};
199	ExecutorCompletionService<String> ecs =
200	new ExecutorCompletionService<String>(e);
201	try {
202	assertNull(ecs.poll());
203	Runnable r = new NoOpRunnable();
204	Future f1 = ecs.submit(r, null);
205	assertTrue("submit must return MyRunnableFuture",
206	f1 instanceof MyRunnableFuture);
207	Future f2 = ecs.take();
208	assertSame("submit and take must return same objects", f1, f2);
209	assertTrue("completed task must have set done", done.get());
210	} finally {
211	joinPool(e);
212	}
213	}
214
215	}