Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 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 | package jsr166; |
| 10 | |
Narayan Kamath | 8e9a0e9 | 2015-04-28 11:40:00 +0100 | [diff] [blame] | 11 | import static java.util.concurrent.TimeUnit.MILLISECONDS; |
| 12 | |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 13 | import java.util.concurrent.ArrayBlockingQueue; |
| 14 | import java.util.concurrent.Callable; |
| 15 | import java.util.concurrent.ExecutorCompletionService; |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 16 | import java.util.concurrent.Executors; |
Narayan Kamath | 8e9a0e9 | 2015-04-28 11:40:00 +0100 | [diff] [blame] | 17 | import java.util.concurrent.ExecutorService; |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 18 | import java.util.concurrent.Future; |
| 19 | import java.util.concurrent.FutureTask; |
| 20 | import java.util.concurrent.RunnableFuture; |
| 21 | import java.util.concurrent.ThreadPoolExecutor; |
| 22 | import java.util.concurrent.TimeUnit; |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 23 | import java.util.concurrent.atomic.AtomicBoolean; |
Narayan Kamath | 8e9a0e9 | 2015-04-28 11:40:00 +0100 | [diff] [blame] | 24 | |
| 25 | import junit.framework.Test; |
| 26 | import junit.framework.TestSuite; |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 27 | |
| 28 | public class ExecutorCompletionServiceTest extends JSR166TestCase { |
Narayan Kamath | 8e9a0e9 | 2015-04-28 11:40:00 +0100 | [diff] [blame] | 29 | // android-note: Removed because the CTS runner does a bad job of |
| 30 | // retrying tests that have suite() declarations. |
| 31 | // |
| 32 | // public static void main(String[] args) { |
| 33 | // main(suite(), args); |
| 34 | // } |
| 35 | // public static Test suite() { |
| 36 | // return new TestSuite(...); |
| 37 | // } |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 38 | |
| 39 | /** |
| 40 | * Creating a new ECS with null Executor throw NPE |
| 41 | */ |
| 42 | public void testConstructorNPE() { |
| 43 | try { |
Narayan Kamath | 8e9a0e9 | 2015-04-28 11:40:00 +0100 | [diff] [blame] | 44 | new ExecutorCompletionService(null); |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 45 | shouldThrow(); |
| 46 | } catch (NullPointerException success) {} |
| 47 | } |
| 48 | |
| 49 | /** |
| 50 | * Creating a new ECS with null queue throw NPE |
| 51 | */ |
| 52 | public void testConstructorNPE2() { |
| 53 | try { |
| 54 | ExecutorService e = Executors.newCachedThreadPool(); |
Narayan Kamath | 8e9a0e9 | 2015-04-28 11:40:00 +0100 | [diff] [blame] | 55 | new ExecutorCompletionService(e, null); |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 56 | shouldThrow(); |
| 57 | } catch (NullPointerException success) {} |
| 58 | } |
| 59 | |
| 60 | /** |
| 61 | * Submitting a null callable throws NPE |
| 62 | */ |
| 63 | public void testSubmitNPE() { |
| 64 | ExecutorService e = Executors.newCachedThreadPool(); |
| 65 | ExecutorCompletionService ecs = new ExecutorCompletionService(e); |
| 66 | try { |
| 67 | Callable c = null; |
| 68 | ecs.submit(c); |
| 69 | shouldThrow(); |
| 70 | } catch (NullPointerException success) { |
| 71 | } finally { |
| 72 | joinPool(e); |
| 73 | } |
| 74 | } |
| 75 | |
| 76 | /** |
| 77 | * Submitting a null runnable throws NPE |
| 78 | */ |
| 79 | public void testSubmitNPE2() { |
| 80 | ExecutorService e = Executors.newCachedThreadPool(); |
| 81 | ExecutorCompletionService ecs = new ExecutorCompletionService(e); |
| 82 | try { |
| 83 | Runnable r = null; |
| 84 | ecs.submit(r, Boolean.TRUE); |
| 85 | shouldThrow(); |
| 86 | } catch (NullPointerException success) { |
| 87 | } finally { |
| 88 | joinPool(e); |
| 89 | } |
| 90 | } |
| 91 | |
| 92 | /** |
| 93 | * A taken submitted task is completed |
| 94 | */ |
| 95 | public void testTake() throws InterruptedException { |
| 96 | ExecutorService e = Executors.newCachedThreadPool(); |
| 97 | ExecutorCompletionService ecs = new ExecutorCompletionService(e); |
| 98 | try { |
| 99 | Callable c = new StringTask(); |
| 100 | ecs.submit(c); |
| 101 | Future f = ecs.take(); |
| 102 | assertTrue(f.isDone()); |
| 103 | } finally { |
| 104 | joinPool(e); |
| 105 | } |
| 106 | } |
| 107 | |
| 108 | /** |
| 109 | * Take returns the same future object returned by submit |
| 110 | */ |
| 111 | public void testTake2() throws InterruptedException { |
| 112 | ExecutorService e = Executors.newCachedThreadPool(); |
| 113 | ExecutorCompletionService ecs = new ExecutorCompletionService(e); |
| 114 | try { |
| 115 | Callable c = new StringTask(); |
| 116 | Future f1 = ecs.submit(c); |
| 117 | Future f2 = ecs.take(); |
| 118 | assertSame(f1, f2); |
| 119 | } finally { |
| 120 | joinPool(e); |
| 121 | } |
| 122 | } |
| 123 | |
| 124 | /** |
| 125 | * If poll returns non-null, the returned task is completed |
| 126 | */ |
| 127 | public void testPoll1() throws Exception { |
| 128 | ExecutorService e = Executors.newCachedThreadPool(); |
| 129 | ExecutorCompletionService ecs = new ExecutorCompletionService(e); |
| 130 | try { |
| 131 | assertNull(ecs.poll()); |
| 132 | Callable c = new StringTask(); |
| 133 | ecs.submit(c); |
| 134 | |
| 135 | long startTime = System.nanoTime(); |
| 136 | Future f; |
| 137 | while ((f = ecs.poll()) == null) { |
| 138 | if (millisElapsedSince(startTime) > LONG_DELAY_MS) |
| 139 | fail("timed out"); |
| 140 | Thread.yield(); |
| 141 | } |
| 142 | assertTrue(f.isDone()); |
| 143 | assertSame(TEST_STRING, f.get()); |
| 144 | } finally { |
| 145 | joinPool(e); |
| 146 | } |
| 147 | } |
| 148 | |
| 149 | /** |
| 150 | * If timed poll returns non-null, the returned task is completed |
| 151 | */ |
| 152 | public void testPoll2() throws InterruptedException { |
| 153 | ExecutorService e = Executors.newCachedThreadPool(); |
| 154 | ExecutorCompletionService ecs = new ExecutorCompletionService(e); |
| 155 | try { |
| 156 | assertNull(ecs.poll()); |
| 157 | Callable c = new StringTask(); |
| 158 | ecs.submit(c); |
| 159 | Future f = ecs.poll(SHORT_DELAY_MS, MILLISECONDS); |
| 160 | if (f != null) |
| 161 | assertTrue(f.isDone()); |
| 162 | } finally { |
| 163 | joinPool(e); |
| 164 | } |
| 165 | } |
| 166 | |
| 167 | /** |
| 168 | * Submitting to underlying AES that overrides newTaskFor(Callable) |
| 169 | * returns and eventually runs Future returned by newTaskFor. |
| 170 | */ |
| 171 | public void testNewTaskForCallable() throws InterruptedException { |
| 172 | final AtomicBoolean done = new AtomicBoolean(false); |
| 173 | class MyCallableFuture<V> extends FutureTask<V> { |
| 174 | MyCallableFuture(Callable<V> c) { super(c); } |
| 175 | protected void done() { done.set(true); } |
| 176 | } |
| 177 | ExecutorService e = new ThreadPoolExecutor( |
| 178 | 1, 1, 30L, TimeUnit.SECONDS, |
| 179 | new ArrayBlockingQueue<Runnable>(1)) { |
| 180 | protected <T> RunnableFuture<T> newTaskFor(Callable<T> c) { |
| 181 | return new MyCallableFuture<T>(c); |
| 182 | }}; |
| 183 | ExecutorCompletionService<String> ecs = |
| 184 | new ExecutorCompletionService<String>(e); |
| 185 | try { |
| 186 | assertNull(ecs.poll()); |
| 187 | Callable<String> c = new StringTask(); |
| 188 | Future f1 = ecs.submit(c); |
| 189 | assertTrue("submit must return MyCallableFuture", |
| 190 | f1 instanceof MyCallableFuture); |
| 191 | Future f2 = ecs.take(); |
| 192 | assertSame("submit and take must return same objects", f1, f2); |
| 193 | assertTrue("completed task must have set done", done.get()); |
| 194 | } finally { |
| 195 | joinPool(e); |
| 196 | } |
| 197 | } |
| 198 | |
| 199 | /** |
| 200 | * Submitting to underlying AES that overrides newTaskFor(Runnable,T) |
| 201 | * returns and eventually runs Future returned by newTaskFor. |
| 202 | */ |
| 203 | public void testNewTaskForRunnable() throws InterruptedException { |
| 204 | final AtomicBoolean done = new AtomicBoolean(false); |
| 205 | class MyRunnableFuture<V> extends FutureTask<V> { |
| 206 | MyRunnableFuture(Runnable t, V r) { super(t, r); } |
| 207 | protected void done() { done.set(true); } |
| 208 | } |
| 209 | ExecutorService e = new ThreadPoolExecutor( |
| 210 | 1, 1, 30L, TimeUnit.SECONDS, |
| 211 | new ArrayBlockingQueue<Runnable>(1)) { |
| 212 | protected <T> RunnableFuture<T> newTaskFor(Runnable t, T r) { |
| 213 | return new MyRunnableFuture<T>(t, r); |
| 214 | }}; |
| 215 | ExecutorCompletionService<String> ecs = |
| 216 | new ExecutorCompletionService<String>(e); |
| 217 | try { |
| 218 | assertNull(ecs.poll()); |
| 219 | Runnable r = new NoOpRunnable(); |
| 220 | Future f1 = ecs.submit(r, null); |
| 221 | assertTrue("submit must return MyRunnableFuture", |
| 222 | f1 instanceof MyRunnableFuture); |
| 223 | Future f2 = ecs.take(); |
| 224 | assertSame("submit and take must return same objects", f1, f2); |
| 225 | assertTrue("completed task must have set done", done.get()); |
| 226 | } finally { |
| 227 | joinPool(e); |
| 228 | } |
| 229 | } |
| 230 | |
| 231 | } |