test/tck/ExecutorsTest.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.security.AccessControlContext;
import java.security.AccessControlException;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.security.PrivilegedExceptionAction;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.Callable;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.Executors;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Future;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ThreadPoolExecutor;

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

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

    /**
     * A newCachedThreadPool can execute runnables
     */
    public void testNewCachedThreadPool1() {
        final ExecutorService e = Executors.newCachedThreadPool();
        try (PoolCleaner cleaner = cleaner(e)) {
            e.execute(new NoOpRunnable());
            e.execute(new NoOpRunnable());
            e.execute(new NoOpRunnable());
        }
    }

    /**
     * A newCachedThreadPool with given ThreadFactory can execute runnables
     */
    public void testNewCachedThreadPool2() {
        final ExecutorService e = Executors.newCachedThreadPool(new SimpleThreadFactory());
        try (PoolCleaner cleaner = cleaner(e)) {
            e.execute(new NoOpRunnable());
            e.execute(new NoOpRunnable());
            e.execute(new NoOpRunnable());
        }
    }

    /**
     * A newCachedThreadPool with null ThreadFactory throws NPE
     */
    public void testNewCachedThreadPool3() {
        try {
            ExecutorService unused = Executors.newCachedThreadPool(null);
            shouldThrow();
        } catch (NullPointerException success) {}
    }

    /**
     * A new SingleThreadExecutor can execute runnables
     */
    public void testNewSingleThreadExecutor1() {
        final ExecutorService e = Executors.newSingleThreadExecutor();
        try (PoolCleaner cleaner = cleaner(e)) {
            e.execute(new NoOpRunnable());
            e.execute(new NoOpRunnable());
            e.execute(new NoOpRunnable());
        }
    }

    /**
     * A new SingleThreadExecutor with given ThreadFactory can execute runnables
     */
    public void testNewSingleThreadExecutor2() {
        final ExecutorService e = Executors.newSingleThreadExecutor(new SimpleThreadFactory());
        try (PoolCleaner cleaner = cleaner(e)) {
            e.execute(new NoOpRunnable());
            e.execute(new NoOpRunnable());
            e.execute(new NoOpRunnable());
        }
    }

    /**
     * A new SingleThreadExecutor with null ThreadFactory throws NPE
     */
    public void testNewSingleThreadExecutor3() {
        try {
            ExecutorService unused = Executors.newSingleThreadExecutor(null);
            shouldThrow();
        } catch (NullPointerException success) {}
    }

    /**
     * A new SingleThreadExecutor cannot be casted to concrete implementation
     */
    public void testCastNewSingleThreadExecutor() {
        final ExecutorService e = Executors.newSingleThreadExecutor();
        try (PoolCleaner cleaner = cleaner(e)) {
            try {
                ThreadPoolExecutor tpe = (ThreadPoolExecutor)e;
                shouldThrow();
            } catch (ClassCastException success) {}
        }
    }

    /**
     * A new newFixedThreadPool can execute runnables
     */
    public void testNewFixedThreadPool1() {
        final ExecutorService e = Executors.newFixedThreadPool(2);
        try (PoolCleaner cleaner = cleaner(e)) {
            e.execute(new NoOpRunnable());
            e.execute(new NoOpRunnable());
            e.execute(new NoOpRunnable());
        }
    }

    /**
     * A new newFixedThreadPool with given ThreadFactory can execute runnables
     */
    public void testNewFixedThreadPool2() {
        final ExecutorService e = Executors.newFixedThreadPool(2, new SimpleThreadFactory());
        try (PoolCleaner cleaner = cleaner(e)) {
            e.execute(new NoOpRunnable());
            e.execute(new NoOpRunnable());
            e.execute(new NoOpRunnable());
        }
    }

    /**
     * A new newFixedThreadPool with null ThreadFactory throws
     * NullPointerException
     */
    public void testNewFixedThreadPool3() {
        try {
            ExecutorService unused = Executors.newFixedThreadPool(2, null);
            shouldThrow();
        } catch (NullPointerException success) {}
    }

    /**
     * A new newFixedThreadPool with 0 threads throws IllegalArgumentException
     */
    public void testNewFixedThreadPool4() {
        try {
            ExecutorService unused = Executors.newFixedThreadPool(0);
            shouldThrow();
        } catch (IllegalArgumentException success) {}
    }

    /**
     * An unconfigurable newFixedThreadPool can execute runnables
     */
    public void testUnconfigurableExecutorService() {
        final ExecutorService e = Executors.unconfigurableExecutorService(Executors.newFixedThreadPool(2));
        try (PoolCleaner cleaner = cleaner(e)) {
            e.execute(new NoOpRunnable());
            e.execute(new NoOpRunnable());
            e.execute(new NoOpRunnable());
        }
    }

    /**
     * unconfigurableExecutorService(null) throws NPE
     */
    public void testUnconfigurableExecutorServiceNPE() {
        try {
            ExecutorService unused =
                Executors.unconfigurableExecutorService(null);
            shouldThrow();
        } catch (NullPointerException success) {}
    }

    /**
     * unconfigurableScheduledExecutorService(null) throws NPE
     */
    public void testUnconfigurableScheduledExecutorServiceNPE() {
        try {
            ExecutorService unused =
                Executors.unconfigurableScheduledExecutorService(null);
            shouldThrow();
        } catch (NullPointerException success) {}
    }

    /**
     * a newSingleThreadScheduledExecutor successfully runs delayed task
     */
    public void testNewSingleThreadScheduledExecutor() throws Exception {
        final ScheduledExecutorService p = Executors.newSingleThreadScheduledExecutor();
        try (PoolCleaner cleaner = cleaner(p)) {
            final CountDownLatch proceed = new CountDownLatch(1);
            final Runnable task = new CheckedRunnable() {
                public void realRun() {
                    await(proceed);
                }};
            long startTime = System.nanoTime();
            Future f = p.schedule(Executors.callable(task, Boolean.TRUE),
                                  timeoutMillis(), MILLISECONDS);
            assertFalse(f.isDone());
            proceed.countDown();
            assertSame(Boolean.TRUE, f.get(LONG_DELAY_MS, MILLISECONDS));
            assertSame(Boolean.TRUE, f.get());
            assertTrue(f.isDone());
            assertFalse(f.isCancelled());
            assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
        }
    }

    /**
     * a newScheduledThreadPool successfully runs delayed task
     */
    public void testNewScheduledThreadPool() throws Exception {
        final ScheduledExecutorService p = Executors.newScheduledThreadPool(2);
        try (PoolCleaner cleaner = cleaner(p)) {
            final CountDownLatch proceed = new CountDownLatch(1);
            final Runnable task = new CheckedRunnable() {
                public void realRun() {
                    await(proceed);
                }};
            long startTime = System.nanoTime();
            Future f = p.schedule(Executors.callable(task, Boolean.TRUE),
                                  timeoutMillis(), MILLISECONDS);
            assertFalse(f.isDone());
            proceed.countDown();
            assertSame(Boolean.TRUE, f.get(LONG_DELAY_MS, MILLISECONDS));
            assertSame(Boolean.TRUE, f.get());
            assertTrue(f.isDone());
            assertFalse(f.isCancelled());
            assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
        }
    }

    /**
     * an unconfigurable newScheduledThreadPool successfully runs delayed task
     */
    public void testUnconfigurableScheduledExecutorService() throws Exception {
        final ScheduledExecutorService p =
            Executors.unconfigurableScheduledExecutorService
            (Executors.newScheduledThreadPool(2));
        try (PoolCleaner cleaner = cleaner(p)) {
            final CountDownLatch proceed = new CountDownLatch(1);
            final Runnable task = new CheckedRunnable() {
                public void realRun() {
                    await(proceed);
                }};
            long startTime = System.nanoTime();
            Future f = p.schedule(Executors.callable(task, Boolean.TRUE),
                                  timeoutMillis(), MILLISECONDS);
            assertFalse(f.isDone());
            proceed.countDown();
            assertSame(Boolean.TRUE, f.get(LONG_DELAY_MS, MILLISECONDS));
            assertSame(Boolean.TRUE, f.get());
            assertTrue(f.isDone());
            assertFalse(f.isCancelled());
            assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
        }
    }

    /**
     * Future.get on submitted tasks will time out if they compute too long.
     */
    public void testTimedCallable() throws Exception {
        final ExecutorService[] executors = {
            Executors.newSingleThreadExecutor(),
            Executors.newCachedThreadPool(),
            Executors.newFixedThreadPool(2),
            Executors.newScheduledThreadPool(2),
        };

        final Runnable sleeper = new CheckedRunnable() {
            public void realRun() throws InterruptedException {
                try {
                    delay(LONG_DELAY_MS);
                } catch (InterruptedException OK) {
                }
            }};

        List<Thread> threads = new ArrayList<>();
        for (final ExecutorService executor : executors) {
            threads.add(newStartedThread(new CheckedRunnable() {
                public void realRun() {
                    Future future = executor.submit(sleeper);
                    assertFutureTimesOut(future);
                }}));
        }
        for (Thread thread : threads)
            awaitTermination(thread);
        for (ExecutorService executor : executors)
            executor.shutdownNow(); // assumes shutdownNow interrupts threads
        for (ExecutorService executor : executors)
            joinPool(executor);
    }

    /**
     * ThreadPoolExecutor using defaultThreadFactory has
     * specified group, priority, daemon status, and name
     */
    public void testDefaultThreadFactory() throws Exception {
        final ThreadGroup egroup = Thread.currentThread().getThreadGroup();
        final CountDownLatch done = new CountDownLatch(1);
        Runnable r = new CheckedRunnable() {
            public void realRun() {
                try {
                    Thread current = Thread.currentThread();
                    assertFalse(current.isDaemon());
                    assertTrue(current.getPriority() <= Thread.NORM_PRIORITY);
                    SecurityManager s = System.getSecurityManager();
                    assertSame(current.getThreadGroup(),
                               (s == null) ? egroup : s.getThreadGroup());
                    assertTrue(current.getName().endsWith("thread-1"));
                } catch (SecurityException ok) {
                    // Also pass if not allowed to change setting
                }
                done.countDown();
            }};
        ExecutorService e = Executors.newSingleThreadExecutor(Executors.defaultThreadFactory());
        try (PoolCleaner cleaner = cleaner(e)) {
            e.execute(r);
            await(done);
        }
    }

    /**
     * ThreadPoolExecutor using privilegedThreadFactory has
     * specified group, priority, daemon status, name,
     * access control context and context class loader
     */
    public void testPrivilegedThreadFactory() throws Exception {
        final CountDownLatch done = new CountDownLatch(1);
        Runnable r = new CheckedRunnable() {
            public void realRun() throws Exception {
                final ThreadGroup egroup = Thread.currentThread().getThreadGroup();
                final ClassLoader thisccl = Thread.currentThread().getContextClassLoader();
                final AccessControlContext thisacc = AccessController.getContext();
                Runnable r = new CheckedRunnable() {
                    public void realRun() {
                        Thread current = Thread.currentThread();
                        assertFalse(current.isDaemon());
                        assertTrue(current.getPriority() <= Thread.NORM_PRIORITY);
                        SecurityManager s = System.getSecurityManager();
                        assertSame(current.getThreadGroup(),
                                   (s == null) ? egroup : s.getThreadGroup());
                        assertTrue(current.getName().endsWith("thread-1"));
                        assertSame(thisccl, current.getContextClassLoader());
                        assertEquals(thisacc, AccessController.getContext());
                        done.countDown();
                    }};
                ExecutorService e = Executors.newSingleThreadExecutor(Executors.privilegedThreadFactory());
                try (PoolCleaner cleaner = cleaner(e)) {
                    e.execute(r);
                    await(done);
                }
            }};

        runWithPermissions(r,
                           new RuntimePermission("getClassLoader"),
                           new RuntimePermission("setContextClassLoader"),
                           new RuntimePermission("modifyThread"));
    }

    boolean haveCCLPermissions() {
        SecurityManager sm = System.getSecurityManager();
        if (sm != null) {
            try {
                sm.checkPermission(new RuntimePermission("setContextClassLoader"));
                sm.checkPermission(new RuntimePermission("getClassLoader"));
            } catch (AccessControlException e) {
                return false;
            }
        }
        return true;
    }

    void checkCCL() {
        SecurityManager sm = System.getSecurityManager();
        if (sm != null) {
            sm.checkPermission(new RuntimePermission("setContextClassLoader"));
            sm.checkPermission(new RuntimePermission("getClassLoader"));
        }
    }

    class CheckCCL implements Callable<Object> {
        public Object call() {
            checkCCL();
            return null;
        }
    }

    /**
     * Without class loader permissions, creating
     * privilegedCallableUsingCurrentClassLoader throws ACE
     */
    public void testCreatePrivilegedCallableUsingCCLWithNoPrivs() {
        Runnable r = new CheckedRunnable() {
            public void realRun() throws Exception {
                if (System.getSecurityManager() == null)
                    return;
                try {
                    Executors.privilegedCallableUsingCurrentClassLoader(new NoOpCallable());
                    shouldThrow();
                } catch (AccessControlException success) {}
            }};

        runWithoutPermissions(r);
    }

    /**
     * With class loader permissions, calling
     * privilegedCallableUsingCurrentClassLoader does not throw ACE
     */
    public void testPrivilegedCallableUsingCCLWithPrivs() throws Exception {
        Runnable r = new CheckedRunnable() {
            public void realRun() throws Exception {
                Executors.privilegedCallableUsingCurrentClassLoader
                    (new NoOpCallable())
                    .call();
            }};

        runWithPermissions(r,
                           new RuntimePermission("getClassLoader"),
                           new RuntimePermission("setContextClassLoader"));
    }

    /**
     * Without permissions, calling privilegedCallable throws ACE
     */
    public void testPrivilegedCallableWithNoPrivs() throws Exception {
        // Avoid classloader-related SecurityExceptions in swingui.TestRunner
        Executors.privilegedCallable(new CheckCCL());

        Runnable r = new CheckedRunnable() {
            public void realRun() throws Exception {
                if (System.getSecurityManager() == null)
                    return;
                Callable task = Executors.privilegedCallable(new CheckCCL());
                try {
                    task.call();
                    shouldThrow();
                } catch (AccessControlException success) {}
            }};

        runWithoutPermissions(r);

        // It seems rather difficult to test that the
        // AccessControlContext of the privilegedCallable is used
        // instead of its caller.  Below is a failed attempt to do
        // that, which does not work because the AccessController
        // cannot capture the internal state of the current Policy.
        // It would be much more work to differentiate based on,
        // e.g. CodeSource.

//         final AccessControlContext[] noprivAcc = new AccessControlContext[1];
//         final Callable[] task = new Callable[1];

//         runWithPermissions
//             (new CheckedRunnable() {
//                 public void realRun() {
//                     if (System.getSecurityManager() == null)
//                         return;
//                     noprivAcc[0] = AccessController.getContext();
//                     task[0] = Executors.privilegedCallable(new CheckCCL());
//                     try {
//                         AccessController.doPrivileged(new PrivilegedAction<Void>() {
//                                                           public Void run() {
//                                                               checkCCL();
//                                                               return null;
//                                                           }}, noprivAcc[0]);
//                         shouldThrow();
//                     } catch (AccessControlException success) {}
//                 }});

//         runWithPermissions
//             (new CheckedRunnable() {
//                 public void realRun() throws Exception {
//                     if (System.getSecurityManager() == null)
//                         return;
//                     // Verify that we have an underprivileged ACC
//                     try {
//                         AccessController.doPrivileged(new PrivilegedAction<Void>() {
//                                                           public Void run() {
//                                                               checkCCL();
//                                                               return null;
//                                                           }}, noprivAcc[0]);
//                         shouldThrow();
//                     } catch (AccessControlException success) {}

//                     try {
//                         task[0].call();
//                         shouldThrow();
//                     } catch (AccessControlException success) {}
//                 }},
//              new RuntimePermission("getClassLoader"),
//              new RuntimePermission("setContextClassLoader"));
    }

    /**
     * With permissions, calling privilegedCallable succeeds
     */
    public void testPrivilegedCallableWithPrivs() throws Exception {
        Runnable r = new CheckedRunnable() {
            public void realRun() throws Exception {
                Executors.privilegedCallable(new CheckCCL()).call();
            }};

        runWithPermissions(r,
                           new RuntimePermission("getClassLoader"),
                           new RuntimePermission("setContextClassLoader"));
    }

    /**
     * callable(Runnable) returns null when called
     */
    public void testCallable1() throws Exception {
        Callable c = Executors.callable(new NoOpRunnable());
        assertNull(c.call());
    }

    /**
     * callable(Runnable, result) returns result when called
     */
    public void testCallable2() throws Exception {
        Callable c = Executors.callable(new NoOpRunnable(), one);
        assertSame(one, c.call());
    }

    /**
     * callable(PrivilegedAction) returns its result when called
     */
    public void testCallable3() throws Exception {
        Callable c = Executors.callable(new PrivilegedAction() {
                public Object run() { return one; }});
        assertSame(one, c.call());
    }

    /**
     * callable(PrivilegedExceptionAction) returns its result when called
     */
    public void testCallable4() throws Exception {
        Callable c = Executors.callable(new PrivilegedExceptionAction() {
                public Object run() { return one; }});
        assertSame(one, c.call());
    }

    /**
     * callable(null Runnable) throws NPE
     */
    public void testCallableNPE1() {
        try {
            Callable unused = Executors.callable((Runnable) null);
            shouldThrow();
        } catch (NullPointerException success) {}
    }

    /**
     * callable(null, result) throws NPE
     */
    public void testCallableNPE2() {
        try {
            Callable unused = Executors.callable((Runnable) null, one);
            shouldThrow();
        } catch (NullPointerException success) {}
    }

    /**
     * callable(null PrivilegedAction) throws NPE
     */
    public void testCallableNPE3() {
        try {
            Callable unused = Executors.callable((PrivilegedAction) null);
            shouldThrow();
        } catch (NullPointerException success) {}
    }

    /**
     * callable(null PrivilegedExceptionAction) throws NPE
     */
    public void testCallableNPE4() {
        try {
            Callable unused = Executors.callable((PrivilegedExceptionAction) null);
            shouldThrow();
        } catch (NullPointerException success) {}
    }

    /**
     * callable(runnable, x).toString() contains toString of wrapped task
     */
    public void testCallable_withResult_toString() {
        if (testImplementationDetails) {
            Runnable r = () -> {};
            Callable<String> c = Executors.callable(r, "");
            assertEquals(
                identityString(c) + "[Wrapped task = " + r.toString() + "]",
                c.toString());
        }
    }

    /**
     * callable(runnable).toString() contains toString of wrapped task
     */
    public void testCallable_toString() {
        if (testImplementationDetails) {
            Runnable r = () -> {};
            Callable<Object> c = Executors.callable(r);
            assertEquals(
                identityString(c) + "[Wrapped task = " + r.toString() + "]",
                c.toString());
        }
    }

    /**
     * privilegedCallable(callable).toString() contains toString of wrapped task
     */
    public void testPrivilegedCallable_toString() {
        if (testImplementationDetails) {
            Callable<String> c = () -> "";
            Callable<String> priv = Executors.privilegedCallable(c);
            assertEquals(
                identityString(priv) + "[Wrapped task = " + c.toString() + "]",
                priv.toString());
        }
    }

    /**
     * privilegedCallableUsingCurrentClassLoader(callable).toString()
     * contains toString of wrapped task
     */
    public void testPrivilegedCallableUsingCurrentClassLoader_toString() {
        if (testImplementationDetails) {
            Callable<String> c = () -> "";
            Callable<String> priv = Executors.privilegedCallableUsingCurrentClassLoader(c);
            assertEquals(
                identityString(priv) + "[Wrapped task = " + c.toString() + "]",
                priv.toString());
        }
    }
}
Revision:	1.53
Committed:	Sat Feb 1 17:44:35 2020 UTC (4 years, 2 months ago) by jsr166
Branch:	MAIN
Changes since 1.52:	+1 -1 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 static java.util.concurrent.TimeUnit.MILLISECONDS;
10
11	import java.security.AccessControlContext;
12	import java.security.AccessControlException;
13	import java.security.AccessController;
14	import java.security.PrivilegedAction;
15	import java.security.PrivilegedExceptionAction;
16	import java.util.ArrayList;
17	import java.util.List;
18	import java.util.concurrent.Callable;
19	import java.util.concurrent.CountDownLatch;
20	import java.util.concurrent.Executors;
21	import java.util.concurrent.ExecutorService;
22	import java.util.concurrent.Future;
23	import java.util.concurrent.ScheduledExecutorService;
24	import java.util.concurrent.ThreadPoolExecutor;
25
26	import junit.framework.Test;
27	import junit.framework.TestSuite;
28
29	public class ExecutorsTest extends JSR166TestCase {
30	public static void main(String[] args) {
31	main(suite(), args);
32	}
33	public static Test suite() {
34	return new TestSuite(ExecutorsTest.class);
35	}
36
37	/**
38	* A newCachedThreadPool can execute runnables
39	*/
40	public void testNewCachedThreadPool1() {
41	final ExecutorService e = Executors.newCachedThreadPool();
42	try (PoolCleaner cleaner = cleaner(e)) {
43	e.execute(new NoOpRunnable());
44	e.execute(new NoOpRunnable());
45	e.execute(new NoOpRunnable());
46	}
47	}
48
49	/**
50	* A newCachedThreadPool with given ThreadFactory can execute runnables
51	*/
52	public void testNewCachedThreadPool2() {
53	final ExecutorService e = Executors.newCachedThreadPool(new SimpleThreadFactory());
54	try (PoolCleaner cleaner = cleaner(e)) {
55	e.execute(new NoOpRunnable());
56	e.execute(new NoOpRunnable());
57	e.execute(new NoOpRunnable());
58	}
59	}
60
61	/**
62	* A newCachedThreadPool with null ThreadFactory throws NPE
63	*/
64	public void testNewCachedThreadPool3() {
65	try {
66	ExecutorService unused = Executors.newCachedThreadPool(null);
67	shouldThrow();
68	} catch (NullPointerException success) {}
69	}
70
71	/**
72	* A new SingleThreadExecutor can execute runnables
73	*/
74	public void testNewSingleThreadExecutor1() {
75	final ExecutorService e = Executors.newSingleThreadExecutor();
76	try (PoolCleaner cleaner = cleaner(e)) {
77	e.execute(new NoOpRunnable());
78	e.execute(new NoOpRunnable());
79	e.execute(new NoOpRunnable());
80	}
81	}
82
83	/**
84	* A new SingleThreadExecutor with given ThreadFactory can execute runnables
85	*/
86	public void testNewSingleThreadExecutor2() {
87	final ExecutorService e = Executors.newSingleThreadExecutor(new SimpleThreadFactory());
88	try (PoolCleaner cleaner = cleaner(e)) {
89	e.execute(new NoOpRunnable());
90	e.execute(new NoOpRunnable());
91	e.execute(new NoOpRunnable());
92	}
93	}
94
95	/**
96	* A new SingleThreadExecutor with null ThreadFactory throws NPE
97	*/
98	public void testNewSingleThreadExecutor3() {
99	try {
100	ExecutorService unused = Executors.newSingleThreadExecutor(null);
101	shouldThrow();
102	} catch (NullPointerException success) {}
103	}
104
105	/**
106	* A new SingleThreadExecutor cannot be casted to concrete implementation
107	*/
108	public void testCastNewSingleThreadExecutor() {
109	final ExecutorService e = Executors.newSingleThreadExecutor();
110	try (PoolCleaner cleaner = cleaner(e)) {
111	try {
112	ThreadPoolExecutor tpe = (ThreadPoolExecutor)e;
113	shouldThrow();
114	} catch (ClassCastException success) {}
115	}
116	}
117
118	/**
119	* A new newFixedThreadPool can execute runnables
120	*/
121	public void testNewFixedThreadPool1() {
122	final ExecutorService e = Executors.newFixedThreadPool(2);
123	try (PoolCleaner cleaner = cleaner(e)) {
124	e.execute(new NoOpRunnable());
125	e.execute(new NoOpRunnable());
126	e.execute(new NoOpRunnable());
127	}
128	}
129
130	/**
131	* A new newFixedThreadPool with given ThreadFactory can execute runnables
132	*/
133	public void testNewFixedThreadPool2() {
134	final ExecutorService e = Executors.newFixedThreadPool(2, new SimpleThreadFactory());
135	try (PoolCleaner cleaner = cleaner(e)) {
136	e.execute(new NoOpRunnable());
137	e.execute(new NoOpRunnable());
138	e.execute(new NoOpRunnable());
139	}
140	}
141
142	/**
143	* A new newFixedThreadPool with null ThreadFactory throws
144	* NullPointerException
145	*/
146	public void testNewFixedThreadPool3() {
147	try {
148	ExecutorService unused = Executors.newFixedThreadPool(2, null);
149	shouldThrow();
150	} catch (NullPointerException success) {}
151	}
152
153	/**
154	* A new newFixedThreadPool with 0 threads throws IllegalArgumentException
155	*/
156	public void testNewFixedThreadPool4() {
157	try {
158	ExecutorService unused = Executors.newFixedThreadPool(0);
159	shouldThrow();
160	} catch (IllegalArgumentException success) {}
161	}
162
163	/**
164	* An unconfigurable newFixedThreadPool can execute runnables
165	*/
166	public void testUnconfigurableExecutorService() {
167	final ExecutorService e = Executors.unconfigurableExecutorService(Executors.newFixedThreadPool(2));
168	try (PoolCleaner cleaner = cleaner(e)) {
169	e.execute(new NoOpRunnable());
170	e.execute(new NoOpRunnable());
171	e.execute(new NoOpRunnable());
172	}
173	}
174
175	/**
176	* unconfigurableExecutorService(null) throws NPE
177	*/
178	public void testUnconfigurableExecutorServiceNPE() {
179	try {
180	ExecutorService unused =
181	Executors.unconfigurableExecutorService(null);
182	shouldThrow();
183	} catch (NullPointerException success) {}
184	}
185
186	/**
187	* unconfigurableScheduledExecutorService(null) throws NPE
188	*/
189	public void testUnconfigurableScheduledExecutorServiceNPE() {
190	try {
191	ExecutorService unused =
192	Executors.unconfigurableScheduledExecutorService(null);
193	shouldThrow();
194	} catch (NullPointerException success) {}
195	}
196
197	/**
198	* a newSingleThreadScheduledExecutor successfully runs delayed task
199	*/
200	public void testNewSingleThreadScheduledExecutor() throws Exception {
201	final ScheduledExecutorService p = Executors.newSingleThreadScheduledExecutor();
202	try (PoolCleaner cleaner = cleaner(p)) {
203	final CountDownLatch proceed = new CountDownLatch(1);
204	final Runnable task = new CheckedRunnable() {
205	public void realRun() {
206	await(proceed);
207	}};
208	long startTime = System.nanoTime();
209	Future f = p.schedule(Executors.callable(task, Boolean.TRUE),
210	timeoutMillis(), MILLISECONDS);
211	assertFalse(f.isDone());
212	proceed.countDown();
213	assertSame(Boolean.TRUE, f.get(LONG_DELAY_MS, MILLISECONDS));
214	assertSame(Boolean.TRUE, f.get());
215	assertTrue(f.isDone());
216	assertFalse(f.isCancelled());
217	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
218	}
219	}
220
221	/**
222	* a newScheduledThreadPool successfully runs delayed task
223	*/
224	public void testNewScheduledThreadPool() throws Exception {
225	final ScheduledExecutorService p = Executors.newScheduledThreadPool(2);
226	try (PoolCleaner cleaner = cleaner(p)) {
227	final CountDownLatch proceed = new CountDownLatch(1);
228	final Runnable task = new CheckedRunnable() {
229	public void realRun() {
230	await(proceed);
231	}};
232	long startTime = System.nanoTime();
233	Future f = p.schedule(Executors.callable(task, Boolean.TRUE),
234	timeoutMillis(), MILLISECONDS);
235	assertFalse(f.isDone());
236	proceed.countDown();
237	assertSame(Boolean.TRUE, f.get(LONG_DELAY_MS, MILLISECONDS));
238	assertSame(Boolean.TRUE, f.get());
239	assertTrue(f.isDone());
240	assertFalse(f.isCancelled());
241	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
242	}
243	}
244
245	/**
246	* an unconfigurable newScheduledThreadPool successfully runs delayed task
247	*/
248	public void testUnconfigurableScheduledExecutorService() throws Exception {
249	final ScheduledExecutorService p =
250	Executors.unconfigurableScheduledExecutorService
251	(Executors.newScheduledThreadPool(2));
252	try (PoolCleaner cleaner = cleaner(p)) {
253	final CountDownLatch proceed = new CountDownLatch(1);
254	final Runnable task = new CheckedRunnable() {
255	public void realRun() {
256	await(proceed);
257	}};
258	long startTime = System.nanoTime();
259	Future f = p.schedule(Executors.callable(task, Boolean.TRUE),
260	timeoutMillis(), MILLISECONDS);
261	assertFalse(f.isDone());
262	proceed.countDown();
263	assertSame(Boolean.TRUE, f.get(LONG_DELAY_MS, MILLISECONDS));
264	assertSame(Boolean.TRUE, f.get());
265	assertTrue(f.isDone());
266	assertFalse(f.isCancelled());
267	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
268	}
269	}
270
271	/**
272	* Future.get on submitted tasks will time out if they compute too long.
273	*/
274	public void testTimedCallable() throws Exception {
275	final ExecutorService[] executors = {
276	Executors.newSingleThreadExecutor(),
277	Executors.newCachedThreadPool(),
278	Executors.newFixedThreadPool(2),
279	Executors.newScheduledThreadPool(2),
280	};
281
282	final Runnable sleeper = new CheckedRunnable() {
283	public void realRun() throws InterruptedException {
284	try {
285	delay(LONG_DELAY_MS);
286	} catch (InterruptedException OK) {
287	}
288	}};
289
290	List<Thread> threads = new ArrayList<>();
291	for (final ExecutorService executor : executors) {
292	threads.add(newStartedThread(new CheckedRunnable() {
293	public void realRun() {
294	Future future = executor.submit(sleeper);
295	assertFutureTimesOut(future);
296	}}));
297	}
298	for (Thread thread : threads)
299	awaitTermination(thread);
300	for (ExecutorService executor : executors)
301	executor.shutdownNow(); // assumes shutdownNow interrupts threads
302	for (ExecutorService executor : executors)
303	joinPool(executor);
304	}
305
306	/**
307	* ThreadPoolExecutor using defaultThreadFactory has
308	* specified group, priority, daemon status, and name
309	*/
310	public void testDefaultThreadFactory() throws Exception {
311	final ThreadGroup egroup = Thread.currentThread().getThreadGroup();
312	final CountDownLatch done = new CountDownLatch(1);
313	Runnable r = new CheckedRunnable() {
314	public void realRun() {
315	try {
316	Thread current = Thread.currentThread();
317	assertFalse(current.isDaemon());
318	assertTrue(current.getPriority() <= Thread.NORM_PRIORITY);
319	SecurityManager s = System.getSecurityManager();
320	assertSame(current.getThreadGroup(),
321	(s == null) ? egroup : s.getThreadGroup());
322	assertTrue(current.getName().endsWith("thread-1"));
323	} catch (SecurityException ok) {
324	// Also pass if not allowed to change setting
325	}
326	done.countDown();
327	}};
328	ExecutorService e = Executors.newSingleThreadExecutor(Executors.defaultThreadFactory());
329	try (PoolCleaner cleaner = cleaner(e)) {
330	e.execute(r);
331	await(done);
332	}
333	}
334
335	/**
336	* ThreadPoolExecutor using privilegedThreadFactory has
337	* specified group, priority, daemon status, name,
338	* access control context and context class loader
339	*/
340	public void testPrivilegedThreadFactory() throws Exception {
341	final CountDownLatch done = new CountDownLatch(1);
342	Runnable r = new CheckedRunnable() {
343	public void realRun() throws Exception {
344	final ThreadGroup egroup = Thread.currentThread().getThreadGroup();
345	final ClassLoader thisccl = Thread.currentThread().getContextClassLoader();
346	final AccessControlContext thisacc = AccessController.getContext();
347	Runnable r = new CheckedRunnable() {
348	public void realRun() {
349	Thread current = Thread.currentThread();
350	assertFalse(current.isDaemon());
351	assertTrue(current.getPriority() <= Thread.NORM_PRIORITY);
352	SecurityManager s = System.getSecurityManager();
353	assertSame(current.getThreadGroup(),
354	(s == null) ? egroup : s.getThreadGroup());
355	assertTrue(current.getName().endsWith("thread-1"));
356	assertSame(thisccl, current.getContextClassLoader());
357	assertEquals(thisacc, AccessController.getContext());
358	done.countDown();
359	}};
360	ExecutorService e = Executors.newSingleThreadExecutor(Executors.privilegedThreadFactory());
361	try (PoolCleaner cleaner = cleaner(e)) {
362	e.execute(r);
363	await(done);
364	}
365	}};
366
367	runWithPermissions(r,
368	new RuntimePermission("getClassLoader"),
369	new RuntimePermission("setContextClassLoader"),
370	new RuntimePermission("modifyThread"));
371	}
372
373	boolean haveCCLPermissions() {
374	SecurityManager sm = System.getSecurityManager();
375	if (sm != null) {
376	try {
377	sm.checkPermission(new RuntimePermission("setContextClassLoader"));
378	sm.checkPermission(new RuntimePermission("getClassLoader"));
379	} catch (AccessControlException e) {
380	return false;
381	}
382	}
383	return true;
384	}
385
386	void checkCCL() {
387	SecurityManager sm = System.getSecurityManager();
388	if (sm != null) {
389	sm.checkPermission(new RuntimePermission("setContextClassLoader"));
390	sm.checkPermission(new RuntimePermission("getClassLoader"));
391	}
392	}
393
394	class CheckCCL implements Callable<Object> {
395	public Object call() {
396	checkCCL();
397	return null;
398	}
399	}
400
401	/**
402	* Without class loader permissions, creating
403	* privilegedCallableUsingCurrentClassLoader throws ACE
404	*/
405	public void testCreatePrivilegedCallableUsingCCLWithNoPrivs() {
406	Runnable r = new CheckedRunnable() {
407	public void realRun() throws Exception {
408	if (System.getSecurityManager() == null)
409	return;
410	try {
411	Executors.privilegedCallableUsingCurrentClassLoader(new NoOpCallable());
412	shouldThrow();
413	} catch (AccessControlException success) {}
414	}};
415
416	runWithoutPermissions(r);
417	}
418
419	/**
420	* With class loader permissions, calling
421	* privilegedCallableUsingCurrentClassLoader does not throw ACE
422	*/
423	public void testPrivilegedCallableUsingCCLWithPrivs() throws Exception {
424	Runnable r = new CheckedRunnable() {
425	public void realRun() throws Exception {
426	Executors.privilegedCallableUsingCurrentClassLoader
427	(new NoOpCallable())
428	.call();
429	}};
430
431	runWithPermissions(r,
432	new RuntimePermission("getClassLoader"),
433	new RuntimePermission("setContextClassLoader"));
434	}
435
436	/**
437	* Without permissions, calling privilegedCallable throws ACE
438	*/
439	public void testPrivilegedCallableWithNoPrivs() throws Exception {
440	// Avoid classloader-related SecurityExceptions in swingui.TestRunner
441	Executors.privilegedCallable(new CheckCCL());
442
443	Runnable r = new CheckedRunnable() {
444	public void realRun() throws Exception {
445	if (System.getSecurityManager() == null)
446	return;
447	Callable task = Executors.privilegedCallable(new CheckCCL());
448	try {
449	task.call();
450	shouldThrow();
451	} catch (AccessControlException success) {}
452	}};
453
454	runWithoutPermissions(r);
455
456	// It seems rather difficult to test that the
457	// AccessControlContext of the privilegedCallable is used
458	// instead of its caller. Below is a failed attempt to do
459	// that, which does not work because the AccessController
460	// cannot capture the internal state of the current Policy.
461	// It would be much more work to differentiate based on,
462	// e.g. CodeSource.
463
464	// final AccessControlContext[] noprivAcc = new AccessControlContext[1];
465	// final Callable[] task = new Callable[1];
466
467	// runWithPermissions
468	// (new CheckedRunnable() {
469	// public void realRun() {
470	// if (System.getSecurityManager() == null)
471	// return;
472	// noprivAcc[0] = AccessController.getContext();
473	// task[0] = Executors.privilegedCallable(new CheckCCL());
474	// try {
475	// AccessController.doPrivileged(new PrivilegedAction<Void>() {
476	// public Void run() {
477	// checkCCL();
478	// return null;
479	// }}, noprivAcc[0]);
480	// shouldThrow();
481	// } catch (AccessControlException success) {}
482	// }});
483
484	// runWithPermissions
485	// (new CheckedRunnable() {
486	// public void realRun() throws Exception {
487	// if (System.getSecurityManager() == null)
488	// return;
489	// // Verify that we have an underprivileged ACC
490	// try {
491	// AccessController.doPrivileged(new PrivilegedAction<Void>() {
492	// public Void run() {
493	// checkCCL();
494	// return null;
495	// }}, noprivAcc[0]);
496	// shouldThrow();
497	// } catch (AccessControlException success) {}
498
499	// try {
500	// task[0].call();
501	// shouldThrow();
502	// } catch (AccessControlException success) {}
503	// }},
504	// new RuntimePermission("getClassLoader"),
505	// new RuntimePermission("setContextClassLoader"));
506	}
507
508	/**
509	* With permissions, calling privilegedCallable succeeds
510	*/
511	public void testPrivilegedCallableWithPrivs() throws Exception {
512	Runnable r = new CheckedRunnable() {
513	public void realRun() throws Exception {
514	Executors.privilegedCallable(new CheckCCL()).call();
515	}};
516
517	runWithPermissions(r,
518	new RuntimePermission("getClassLoader"),
519	new RuntimePermission("setContextClassLoader"));
520	}
521
522	/**
523	* callable(Runnable) returns null when called
524	*/
525	public void testCallable1() throws Exception {
526	Callable c = Executors.callable(new NoOpRunnable());
527	assertNull(c.call());
528	}
529
530	/**
531	* callable(Runnable, result) returns result when called
532	*/
533	public void testCallable2() throws Exception {
534	Callable c = Executors.callable(new NoOpRunnable(), one);
535	assertSame(one, c.call());
536	}
537
538	/**
539	* callable(PrivilegedAction) returns its result when called
540	*/
541	public void testCallable3() throws Exception {
542	Callable c = Executors.callable(new PrivilegedAction() {
543	public Object run() { return one; }});
544	assertSame(one, c.call());
545	}
546
547	/**
548	* callable(PrivilegedExceptionAction) returns its result when called
549	*/
550	public void testCallable4() throws Exception {
551	Callable c = Executors.callable(new PrivilegedExceptionAction() {
552	public Object run() { return one; }});
553	assertSame(one, c.call());
554	}
555
556	/**
557	* callable(null Runnable) throws NPE
558	*/
559	public void testCallableNPE1() {
560	try {
561	Callable unused = Executors.callable((Runnable) null);
562	shouldThrow();
563	} catch (NullPointerException success) {}
564	}
565
566	/**
567	* callable(null, result) throws NPE
568	*/
569	public void testCallableNPE2() {
570	try {
571	Callable unused = Executors.callable((Runnable) null, one);
572	shouldThrow();
573	} catch (NullPointerException success) {}
574	}
575
576	/**
577	* callable(null PrivilegedAction) throws NPE
578	*/
579	public void testCallableNPE3() {
580	try {
581	Callable unused = Executors.callable((PrivilegedAction) null);
582	shouldThrow();
583	} catch (NullPointerException success) {}
584	}
585
586	/**
587	* callable(null PrivilegedExceptionAction) throws NPE
588	*/
589	public void testCallableNPE4() {
590	try {
591	Callable unused = Executors.callable((PrivilegedExceptionAction) null);
592	shouldThrow();
593	} catch (NullPointerException success) {}
594	}
595
596	/**
597	* callable(runnable, x).toString() contains toString of wrapped task
598	*/
599	public void testCallable_withResult_toString() {
600	if (testImplementationDetails) {
601	Runnable r = () -> {};
602	Callable<String> c = Executors.callable(r, "");
603	assertEquals(
604	identityString(c) + "[Wrapped task = " + r.toString() + "]",
605	c.toString());
606	}
607	}
608
609	/**
610	* callable(runnable).toString() contains toString of wrapped task
611	*/
612	public void testCallable_toString() {
613	if (testImplementationDetails) {
614	Runnable r = () -> {};
615	Callable<Object> c = Executors.callable(r);
616	assertEquals(
617	identityString(c) + "[Wrapped task = " + r.toString() + "]",
618	c.toString());
619	}
620	}
621
622	/**
623	* privilegedCallable(callable).toString() contains toString of wrapped task
624	*/
625	public void testPrivilegedCallable_toString() {
626	if (testImplementationDetails) {
627	Callable<String> c = () -> "";
628	Callable<String> priv = Executors.privilegedCallable(c);
629	assertEquals(
630	identityString(priv) + "[Wrapped task = " + c.toString() + "]",
631	priv.toString());
632	}
633	}
634
635	/**
636	* privilegedCallableUsingCurrentClassLoader(callable).toString()
637	* contains toString of wrapped task
638	*/
639	public void testPrivilegedCallableUsingCurrentClassLoader_toString() {
640	if (testImplementationDetails) {
641	Callable<String> c = () -> "";
642	Callable<String> priv = Executors.privilegedCallableUsingCurrentClassLoader(c);
643	assertEquals(
644	identityString(priv) + "[Wrapped task = " + c.toString() + "]",
645	priv.toString());
646	}
647	}
648	}