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.ArrayBlockingQueue;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutorCompletionService;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
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 static java.util.concurrent.TimeUnit.MILLISECONDS;
import java.util.concurrent.atomic.AtomicBoolean;
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 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:	1.18
Committed:	Tue May 31 16:16:23 2011 UTC (12 years, 11 months ago) by jsr166
Branch:	MAIN
Changes since 1.17:	+11 -2 lines
Log Message:	use serialClone in serialization tests; update imports
#	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.ArrayBlockingQueue;
12	import java.util.concurrent.Callable;
13	import java.util.concurrent.ExecutorCompletionService;
14	import java.util.concurrent.ExecutorService;
15	import java.util.concurrent.Executors;
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 static java.util.concurrent.TimeUnit.MILLISECONDS;
22	import java.util.concurrent.atomic.AtomicBoolean;
23	import java.security.*;
24
25	public class ExecutorCompletionServiceTest extends JSR166TestCase {
26	public static void main(String[] args) {
27	junit.textui.TestRunner.run(suite());
28	}
29	public static Test suite() {
30	return new TestSuite(ExecutorCompletionServiceTest.class);
31	}
32
33	/**
34	* Creating a new ECS with null Executor throw NPE
35	*/
36	public void testConstructorNPE() {
37	try {
38	ExecutorCompletionService ecs = new ExecutorCompletionService(null);
39	shouldThrow();
40	} catch (NullPointerException success) {}
41	}
42
43	/**
44	* Creating a new ECS with null queue throw NPE
45	*/
46	public void testConstructorNPE2() {
47	try {
48	ExecutorService e = Executors.newCachedThreadPool();
49	ExecutorCompletionService ecs = new ExecutorCompletionService(e, null);
50	shouldThrow();
51	} catch (NullPointerException success) {}
52	}
53
54	/**
55	* Submitting a null callable throws NPE
56	*/
57	public void testSubmitNPE() {
58	ExecutorService e = Executors.newCachedThreadPool();
59	ExecutorCompletionService ecs = new ExecutorCompletionService(e);
60	try {
61	Callable c = null;
62	ecs.submit(c);
63	shouldThrow();
64	} catch (NullPointerException success) {
65	} finally {
66	joinPool(e);
67	}
68	}
69
70	/**
71	* Submitting a null runnable throws NPE
72	*/
73	public void testSubmitNPE2() {
74	ExecutorService e = Executors.newCachedThreadPool();
75	ExecutorCompletionService ecs = new ExecutorCompletionService(e);
76	try {
77	Runnable r = null;
78	ecs.submit(r, Boolean.TRUE);
79	shouldThrow();
80	} catch (NullPointerException success) {
81	} finally {
82	joinPool(e);
83	}
84	}
85
86	/**
87	* A taken submitted task is completed
88	*/
89	public void testTake() throws InterruptedException {
90	ExecutorService e = Executors.newCachedThreadPool();
91	ExecutorCompletionService ecs = new ExecutorCompletionService(e);
92	try {
93	Callable c = new StringTask();
94	ecs.submit(c);
95	Future f = ecs.take();
96	assertTrue(f.isDone());
97	} finally {
98	joinPool(e);
99	}
100	}
101
102	/**
103	* Take returns the same future object returned by submit
104	*/
105	public void testTake2() throws InterruptedException {
106	ExecutorService e = Executors.newCachedThreadPool();
107	ExecutorCompletionService ecs = new ExecutorCompletionService(e);
108	try {
109	Callable c = new StringTask();
110	Future f1 = ecs.submit(c);
111	Future f2 = ecs.take();
112	assertSame(f1, f2);
113	} finally {
114	joinPool(e);
115	}
116	}
117
118	/**
119	* If poll returns non-null, the returned task is completed
120	*/
121	public void testPoll1() throws Exception {
122	ExecutorService e = Executors.newCachedThreadPool();
123	ExecutorCompletionService ecs = new ExecutorCompletionService(e);
124	try {
125	assertNull(ecs.poll());
126	Callable c = new StringTask();
127	ecs.submit(c);
128
129	long startTime = System.nanoTime();
130	Future f;
131	while ((f = ecs.poll()) == null) {
132	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
133	fail("timed out");
134	Thread.yield();
135	}
136	assertTrue(f.isDone());
137	assertSame(TEST_STRING, f.get());
138	} finally {
139	joinPool(e);
140	}
141	}
142
143	/**
144	* If timed poll returns non-null, the returned task is completed
145	*/
146	public void testPoll2() throws InterruptedException {
147	ExecutorService e = Executors.newCachedThreadPool();
148	ExecutorCompletionService ecs = new ExecutorCompletionService(e);
149	try {
150	assertNull(ecs.poll());
151	Callable c = new StringTask();
152	ecs.submit(c);
153	Future f = ecs.poll(SHORT_DELAY_MS, MILLISECONDS);
154	if (f != null)
155	assertTrue(f.isDone());
156	} finally {
157	joinPool(e);
158	}
159	}
160
161	/**
162	* Submitting to underlying AES that overrides newTaskFor(Callable)
163	* returns and eventually runs Future returned by newTaskFor.
164	*/
165	public void testNewTaskForCallable() throws InterruptedException {
166	final AtomicBoolean done = new AtomicBoolean(false);
167	class MyCallableFuture<V> extends FutureTask<V> {
168	MyCallableFuture(Callable<V> c) { super(c); }
169	protected void done() { done.set(true); }
170	}
171	ExecutorService e = new ThreadPoolExecutor(
172	1, 1, 30L, TimeUnit.SECONDS,
173	new ArrayBlockingQueue<Runnable>(1)) {
174	protected <T> RunnableFuture<T> newTaskFor(Callable<T> c) {
175	return new MyCallableFuture<T>(c);
176	}};
177	ExecutorCompletionService<String> ecs =
178	new ExecutorCompletionService<String>(e);
179	try {
180	assertNull(ecs.poll());
181	Callable<String> c = new StringTask();
182	Future f1 = ecs.submit(c);
183	assertTrue("submit must return MyCallableFuture",
184	f1 instanceof MyCallableFuture);
185	Future f2 = ecs.take();
186	assertSame("submit and take must return same objects", f1, f2);
187	assertTrue("completed task must have set done", done.get());
188	} finally {
189	joinPool(e);
190	}
191	}
192
193	/**
194	* Submitting to underlying AES that overrides newTaskFor(Runnable,T)
195	* returns and eventually runs Future returned by newTaskFor.
196	*/
197	public void testNewTaskForRunnable() throws InterruptedException {
198	final AtomicBoolean done = new AtomicBoolean(false);
199	class MyRunnableFuture<V> extends FutureTask<V> {
200	MyRunnableFuture(Runnable t, V r) { super(t, r); }
201	protected void done() { done.set(true); }
202	}
203	ExecutorService e = new ThreadPoolExecutor(
204	1, 1, 30L, TimeUnit.SECONDS,
205	new ArrayBlockingQueue<Runnable>(1)) {
206	protected <T> RunnableFuture<T> newTaskFor(Runnable t, T r) {
207	return new MyRunnableFuture<T>(t, r);
208	}};
209	ExecutorCompletionService<String> ecs =
210	new ExecutorCompletionService<String>(e);
211	try {
212	assertNull(ecs.poll());
213	Runnable r = new NoOpRunnable();
214	Future f1 = ecs.submit(r, null);
215	assertTrue("submit must return MyRunnableFuture",
216	f1 instanceof MyRunnableFuture);
217	Future f2 = ecs.take();
218	assertSame("submit and take must return same objects", f1, f2);
219	assertTrue("completed task must have set done", done.get());
220	} finally {
221	joinPool(e);
222	}
223	}
224
225	}