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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/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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|
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import static java.util.concurrent.TimeUnit.MILLISECONDS; |
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|
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import java.security.AccessControlContext; |
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import java.security.AccessControlException; |
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import java.security.AccessController; |
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import java.security.PrivilegedAction; |
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import java.security.PrivilegedExceptionAction; |
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import java.util.ArrayList; |
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import java.util.List; |
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import java.util.concurrent.Callable; |
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import java.util.concurrent.CountDownLatch; |
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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.ScheduledExecutorService; |
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import java.util.concurrent.ThreadPoolExecutor; |
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|
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import junit.framework.Test; |
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import junit.framework.TestSuite; |
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|
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public class ExecutorsTest extends JSR166TestCase { |
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public static void main(String[] args) { |
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main(suite(), args); |
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} |
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public static Test suite() { |
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return new TestSuite(ExecutorsTest.class); |
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} |
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|
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/** |
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* A newCachedThreadPool can execute runnables |
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*/ |
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public void testNewCachedThreadPool1() { |
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final ExecutorService e = Executors.newCachedThreadPool(); |
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try (PoolCleaner cleaner = cleaner(e)) { |
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e.execute(new NoOpRunnable()); |
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e.execute(new NoOpRunnable()); |
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e.execute(new NoOpRunnable()); |
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} |
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} |
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|
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/** |
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* A newCachedThreadPool with given ThreadFactory can execute runnables |
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*/ |
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public void testNewCachedThreadPool2() { |
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final ExecutorService e = Executors.newCachedThreadPool(new SimpleThreadFactory()); |
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try (PoolCleaner cleaner = cleaner(e)) { |
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e.execute(new NoOpRunnable()); |
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e.execute(new NoOpRunnable()); |
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e.execute(new NoOpRunnable()); |
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} |
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} |
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|
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/** |
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* A newCachedThreadPool with null ThreadFactory throws NPE |
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*/ |
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public void testNewCachedThreadPool3() { |
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try { |
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ExecutorService e = Executors.newCachedThreadPool(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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/** |
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* A new SingleThreadExecutor can execute runnables |
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*/ |
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public void testNewSingleThreadExecutor1() { |
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final ExecutorService e = Executors.newSingleThreadExecutor(); |
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try (PoolCleaner cleaner = cleaner(e)) { |
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e.execute(new NoOpRunnable()); |
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e.execute(new NoOpRunnable()); |
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e.execute(new NoOpRunnable()); |
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} |
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} |
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|
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/** |
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* A new SingleThreadExecutor with given ThreadFactory can execute runnables |
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*/ |
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public void testNewSingleThreadExecutor2() { |
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final ExecutorService e = Executors.newSingleThreadExecutor(new SimpleThreadFactory()); |
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try (PoolCleaner cleaner = cleaner(e)) { |
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e.execute(new NoOpRunnable()); |
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e.execute(new NoOpRunnable()); |
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e.execute(new NoOpRunnable()); |
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} |
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} |
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|
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/** |
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* A new SingleThreadExecutor with null ThreadFactory throws NPE |
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*/ |
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public void testNewSingleThreadExecutor3() { |
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try { |
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ExecutorService e = Executors.newSingleThreadExecutor(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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/** |
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* A new SingleThreadExecutor cannot be casted to concrete implementation |
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*/ |
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public void testCastNewSingleThreadExecutor() { |
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final ExecutorService e = Executors.newSingleThreadExecutor(); |
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try (PoolCleaner cleaner = cleaner(e)) { |
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try { |
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ThreadPoolExecutor tpe = (ThreadPoolExecutor)e; |
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shouldThrow(); |
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} catch (ClassCastException success) {} |
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} |
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} |
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|
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/** |
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* A new newFixedThreadPool can execute runnables |
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*/ |
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public void testNewFixedThreadPool1() { |
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final ExecutorService e = Executors.newFixedThreadPool(2); |
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try (PoolCleaner cleaner = cleaner(e)) { |
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e.execute(new NoOpRunnable()); |
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e.execute(new NoOpRunnable()); |
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e.execute(new NoOpRunnable()); |
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} |
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} |
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|
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/** |
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* A new newFixedThreadPool with given ThreadFactory can execute runnables |
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*/ |
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public void testNewFixedThreadPool2() { |
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final ExecutorService e = Executors.newFixedThreadPool(2, new SimpleThreadFactory()); |
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try (PoolCleaner cleaner = cleaner(e)) { |
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e.execute(new NoOpRunnable()); |
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e.execute(new NoOpRunnable()); |
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e.execute(new NoOpRunnable()); |
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} |
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} |
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|
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/** |
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* A new newFixedThreadPool with null ThreadFactory throws NPE |
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*/ |
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public void testNewFixedThreadPool3() { |
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try { |
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ExecutorService e = Executors.newFixedThreadPool(2, 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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/** |
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* A new newFixedThreadPool with 0 threads throws IAE |
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*/ |
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public void testNewFixedThreadPool4() { |
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try { |
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ExecutorService e = Executors.newFixedThreadPool(0); |
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shouldThrow(); |
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} catch (IllegalArgumentException success) {} |
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} |
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|
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/** |
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* An unconfigurable newFixedThreadPool can execute runnables |
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*/ |
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public void testUnconfigurableExecutorService() { |
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final ExecutorService e = Executors.unconfigurableExecutorService(Executors.newFixedThreadPool(2)); |
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try (PoolCleaner cleaner = cleaner(e)) { |
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e.execute(new NoOpRunnable()); |
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e.execute(new NoOpRunnable()); |
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e.execute(new NoOpRunnable()); |
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} |
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} |
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|
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/** |
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* unconfigurableExecutorService(null) throws NPE |
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*/ |
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public void testUnconfigurableExecutorServiceNPE() { |
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try { |
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ExecutorService e = Executors.unconfigurableExecutorService(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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/** |
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* unconfigurableScheduledExecutorService(null) throws NPE |
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*/ |
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public void testUnconfigurableScheduledExecutorServiceNPE() { |
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try { |
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ExecutorService e = Executors.unconfigurableScheduledExecutorService(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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/** |
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* a newSingleThreadScheduledExecutor successfully runs delayed task |
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*/ |
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public void testNewSingleThreadScheduledExecutor() throws Exception { |
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final ScheduledExecutorService p = Executors.newSingleThreadScheduledExecutor(); |
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try (PoolCleaner cleaner = cleaner(p)) { |
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final CountDownLatch proceed = new CountDownLatch(1); |
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final Runnable task = new CheckedRunnable() { |
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public void realRun() { |
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await(proceed); |
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}}; |
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long startTime = System.nanoTime(); |
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Future f = p.schedule(Executors.callable(task, Boolean.TRUE), |
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timeoutMillis(), MILLISECONDS); |
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assertFalse(f.isDone()); |
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proceed.countDown(); |
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assertSame(Boolean.TRUE, f.get(LONG_DELAY_MS, MILLISECONDS)); |
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assertSame(Boolean.TRUE, f.get()); |
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assertTrue(f.isDone()); |
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assertFalse(f.isCancelled()); |
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assertTrue(millisElapsedSince(startTime) >= timeoutMillis()); |
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} |
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} |
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|
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/** |
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* a newScheduledThreadPool successfully runs delayed task |
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*/ |
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public void testNewScheduledThreadPool() throws Exception { |
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final ScheduledExecutorService p = Executors.newScheduledThreadPool(2); |
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try (PoolCleaner cleaner = cleaner(p)) { |
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final CountDownLatch proceed = new CountDownLatch(1); |
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final Runnable task = new CheckedRunnable() { |
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public void realRun() { |
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await(proceed); |
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}}; |
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long startTime = System.nanoTime(); |
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Future f = p.schedule(Executors.callable(task, Boolean.TRUE), |
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timeoutMillis(), MILLISECONDS); |
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assertFalse(f.isDone()); |
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proceed.countDown(); |
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assertSame(Boolean.TRUE, f.get(LONG_DELAY_MS, MILLISECONDS)); |
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assertSame(Boolean.TRUE, f.get()); |
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assertTrue(f.isDone()); |
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assertFalse(f.isCancelled()); |
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assertTrue(millisElapsedSince(startTime) >= timeoutMillis()); |
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} |
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} |
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|
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/** |
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* an unconfigurable newScheduledThreadPool successfully runs delayed task |
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*/ |
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public void testUnconfigurableScheduledExecutorService() throws Exception { |
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final ScheduledExecutorService p = |
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Executors.unconfigurableScheduledExecutorService |
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(Executors.newScheduledThreadPool(2)); |
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try (PoolCleaner cleaner = cleaner(p)) { |
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final CountDownLatch proceed = new CountDownLatch(1); |
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final Runnable task = new CheckedRunnable() { |
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public void realRun() { |
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await(proceed); |
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}}; |
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long startTime = System.nanoTime(); |
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Future f = p.schedule(Executors.callable(task, Boolean.TRUE), |
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timeoutMillis(), MILLISECONDS); |
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assertFalse(f.isDone()); |
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proceed.countDown(); |
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assertSame(Boolean.TRUE, f.get(LONG_DELAY_MS, MILLISECONDS)); |
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assertSame(Boolean.TRUE, f.get()); |
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assertTrue(f.isDone()); |
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assertFalse(f.isCancelled()); |
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assertTrue(millisElapsedSince(startTime) >= timeoutMillis()); |
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} |
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} |
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|
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/** |
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* Future.get on submitted tasks will time out if they compute too long. |
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*/ |
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public void testTimedCallable() throws Exception { |
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final ExecutorService[] executors = { |
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Executors.newSingleThreadExecutor(), |
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Executors.newCachedThreadPool(), |
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Executors.newFixedThreadPool(2), |
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Executors.newScheduledThreadPool(2), |
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}; |
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|
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final Runnable sleeper = new CheckedInterruptedRunnable() { |
280 |
public void realRun() throws InterruptedException { |
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delay(LONG_DELAY_MS); |
282 |
}}; |
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|
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List<Thread> threads = new ArrayList<Thread>(); |
285 |
for (final ExecutorService executor : executors) { |
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threads.add(newStartedThread(new CheckedRunnable() { |
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public void realRun() { |
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Future future = executor.submit(sleeper); |
289 |
assertFutureTimesOut(future); |
290 |
}})); |
291 |
} |
292 |
for (Thread thread : threads) |
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awaitTermination(thread); |
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for (ExecutorService executor : executors) |
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joinPool(executor); |
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} |
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|
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/** |
299 |
* ThreadPoolExecutor using defaultThreadFactory has |
300 |
* specified group, priority, daemon status, and name |
301 |
*/ |
302 |
public void testDefaultThreadFactory() throws Exception { |
303 |
final ThreadGroup egroup = Thread.currentThread().getThreadGroup(); |
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final CountDownLatch done = new CountDownLatch(1); |
305 |
Runnable r = new CheckedRunnable() { |
306 |
public void realRun() { |
307 |
try { |
308 |
Thread current = Thread.currentThread(); |
309 |
assertTrue(!current.isDaemon()); |
310 |
assertTrue(current.getPriority() <= Thread.NORM_PRIORITY); |
311 |
ThreadGroup g = current.getThreadGroup(); |
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SecurityManager s = System.getSecurityManager(); |
313 |
if (s != null) |
314 |
assertTrue(g == s.getThreadGroup()); |
315 |
else |
316 |
assertTrue(g == egroup); |
317 |
String name = current.getName(); |
318 |
assertTrue(name.endsWith("thread-1")); |
319 |
} catch (SecurityException ok) { |
320 |
// Also pass if not allowed to change setting |
321 |
} |
322 |
done.countDown(); |
323 |
}}; |
324 |
ExecutorService e = Executors.newSingleThreadExecutor(Executors.defaultThreadFactory()); |
325 |
try (PoolCleaner cleaner = cleaner(e)) { |
326 |
e.execute(r); |
327 |
await(done); |
328 |
} |
329 |
} |
330 |
|
331 |
/** |
332 |
* ThreadPoolExecutor using privilegedThreadFactory has |
333 |
* specified group, priority, daemon status, name, |
334 |
* access control context and context class loader |
335 |
*/ |
336 |
public void testPrivilegedThreadFactory() throws Exception { |
337 |
final CountDownLatch done = new CountDownLatch(1); |
338 |
Runnable r = new CheckedRunnable() { |
339 |
public void realRun() throws Exception { |
340 |
final ThreadGroup egroup = Thread.currentThread().getThreadGroup(); |
341 |
final ClassLoader thisccl = Thread.currentThread().getContextClassLoader(); |
342 |
final AccessControlContext thisacc = AccessController.getContext(); |
343 |
Runnable r = new CheckedRunnable() { |
344 |
public void realRun() { |
345 |
Thread current = Thread.currentThread(); |
346 |
assertTrue(!current.isDaemon()); |
347 |
assertTrue(current.getPriority() <= Thread.NORM_PRIORITY); |
348 |
ThreadGroup g = current.getThreadGroup(); |
349 |
SecurityManager s = System.getSecurityManager(); |
350 |
if (s != null) |
351 |
assertTrue(g == s.getThreadGroup()); |
352 |
else |
353 |
assertTrue(g == egroup); |
354 |
String name = current.getName(); |
355 |
assertTrue(name.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 c = 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 c = 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 c = 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 c = Executors.callable((PrivilegedExceptionAction) null); |
592 |
shouldThrow(); |
593 |
} catch (NullPointerException success) {} |
594 |
} |
595 |
|
596 |
} |