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root/jsr166/jsr166/src/test/tck/RecursiveActionTest.java
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Comparing jsr166/src/test/tck/RecursiveActionTest.java (file contents):
Revision 1.32 by dl, Tue May 31 10:28:06 2011 UTC vs.
Revision 1.38 by jsr166, Fri Jan 18 04:23:28 2013 UTC

# Line 12 | Line 12 | import java.util.concurrent.ForkJoinPool
12   import java.util.concurrent.ForkJoinTask;
13   import java.util.concurrent.ForkJoinWorkerThread;
14   import java.util.concurrent.RecursiveAction;
15 + import java.util.concurrent.ThreadLocalRandom;
16   import java.util.concurrent.TimeUnit;
17   import java.util.concurrent.TimeoutException;
18   import static java.util.concurrent.TimeUnit.SECONDS;
19 + import java.util.Arrays;
20   import java.util.HashSet;
21  
22   public class RecursiveActionTest extends JSR166TestCase {
# Line 789 | Line 791 | public class RecursiveActionTest extends
791      }
792  
793      /**
794 <     * A reinitialized task may be re-invoked
794 >     * A reinitialized normally completed task may be re-invoked
795       */
796      public void testReinitialize() {
797          RecursiveAction a = new CheckedRecursiveAction() {
# Line 809 | Line 811 | public class RecursiveActionTest extends
811      }
812  
813      /**
814 +     * A reinitialized abnormally completed task may be re-invoked
815 +     */
816 +    public void testReinitializeAbnormal() {
817 +        RecursiveAction a = new CheckedRecursiveAction() {
818 +            public void realCompute() {
819 +                FailingFibAction f = new FailingFibAction(8);
820 +                checkNotDone(f);
821 +
822 +                for (int i = 0; i < 3; i++) {
823 +                    try {
824 +                        f.invoke();
825 +                        shouldThrow();
826 +                    } catch (FJException success) {
827 +                        checkCompletedAbnormally(f, success);
828 +                    }
829 +                    f.reinitialize();
830 +                    checkNotDone(f);
831 +                }
832 +            }};
833 +        testInvokeOnPool(mainPool(), a);
834 +    }
835 +
836 +    /**
837       * invoke task throws exception after invoking completeExceptionally
838       */
839      public void testCompleteExceptionally() {
# Line 1172 | Line 1197 | public class RecursiveActionTest extends
1197          testInvokeOnPool(asyncSingletonPool(), a);
1198      }
1199  
1200 +    /** Demo from RecursiveAction javadoc */
1201 +    static class SortTask extends RecursiveAction {
1202 +        final long[] array; final int lo, hi;
1203 +        SortTask(long[] array, int lo, int hi) {
1204 +            this.array = array; this.lo = lo; this.hi = hi;
1205 +        }
1206 +        SortTask(long[] array) { this(array, 0, array.length); }
1207 +        protected void compute() {
1208 +            if (hi - lo < THRESHOLD)
1209 +                sortSequentially(lo, hi);
1210 +            else {
1211 +                int mid = (lo + hi) >>> 1;
1212 +                invokeAll(new SortTask(array, lo, mid),
1213 +                          new SortTask(array, mid, hi));
1214 +                merge(lo, mid, hi);
1215 +            }
1216 +        }
1217 +        // implementation details follow:
1218 +        static final int THRESHOLD = 100;
1219 +        void sortSequentially(int lo, int hi) {
1220 +            Arrays.sort(array, lo, hi);
1221 +        }
1222 +        void merge(int lo, int mid, int hi) {
1223 +            long[] buf = Arrays.copyOfRange(array, lo, mid);
1224 +            for (int i = 0, j = lo, k = mid; i < buf.length; j++)
1225 +                array[j] = (k == hi || buf[i] < array[k]) ?
1226 +                    buf[i++] : array[k++];
1227 +        }
1228 +    }
1229 +
1230 +    /**
1231 +     * SortTask demo works as advertised
1232 +     */
1233 +    public void testSortTaskDemo() {
1234 +        ThreadLocalRandom rnd = ThreadLocalRandom.current();
1235 +        long[] array = new long[1007];
1236 +        for (int i = 0; i < array.length; i++)
1237 +            array[i] = rnd.nextLong();
1238 +        long[] arrayClone = array.clone();
1239 +        testInvokeOnPool(mainPool(), new SortTask(array));
1240 +        Arrays.sort(arrayClone);
1241 +        assertTrue(Arrays.equals(array, arrayClone));
1242 +    }
1243   }

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