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root/jsr166/jsr166/src/test/tck/JSR166TestCase.java
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Comparing jsr166/src/test/tck/JSR166TestCase.java (file contents):
Revision 1.138 by jsr166, Fri Sep 4 19:35:46 2015 UTC vs.
Revision 1.139 by jsr166, Sun Sep 6 21:14:12 2015 UTC

# Line 37 | Line 37 | import java.util.concurrent.BlockingQueu
37   import java.util.concurrent.Callable;
38   import java.util.concurrent.CountDownLatch;
39   import java.util.concurrent.CyclicBarrier;
40 + import java.util.concurrent.ExecutionException;
41 + import java.util.concurrent.Executors;
42   import java.util.concurrent.ExecutorService;
43   import java.util.concurrent.Future;
44   import java.util.concurrent.RecursiveAction;
# Line 727 | Line 729 | public class JSR166TestCase extends Test
729      /**
730       * Waits out termination of a thread pool or fails doing so.
731       */
732 <    void joinPool(ExecutorService exec) {
732 >    void joinPool(ExecutorService pool) {
733          try {
734 <            exec.shutdown();
735 <            if (!exec.awaitTermination(2 * LONG_DELAY_MS, MILLISECONDS))
736 <                fail("ExecutorService " + exec +
734 >            pool.shutdown();
735 >            if (!pool.awaitTermination(2 * LONG_DELAY_MS, MILLISECONDS))
736 >                fail("ExecutorService " + pool +
737                       " did not terminate in a timely manner");
738          } catch (SecurityException ok) {
739              // Allowed in case test doesn't have privs
# Line 740 | Line 742 | public class JSR166TestCase extends Test
742          }
743      }
744  
745 +    /** Like Runnable, but with the freedom to throw anything */
746 +    interface Thunk { public void run() throws Throwable; }
747 +
748 +    /**
749 +     * Runs all the given tasks in parallel, failing if any fail.
750 +     * Useful for running multiple variants of tests that are
751 +     * necessarily individually slow because they must block.
752 +     */
753 +    void testInParallel(Thunk ... thunks) {
754 +        ExecutorService pool = Executors.newCachedThreadPool();
755 +        try {
756 +            ArrayList<Future<?>> futures = new ArrayList<>(thunks.length);
757 +            for (final Thunk thunk : thunks)
758 +                futures.add(pool.submit(new CheckedRunnable() {
759 +                    public void realRun() throws Throwable { thunk.run();}}));
760 +            for (Future<?> future : futures)
761 +                try {
762 +                    assertNull(future.get(LONG_DELAY_MS, MILLISECONDS));
763 +                } catch (ExecutionException ex) {
764 +                    threadUnexpectedException(ex.getCause());
765 +                } catch (Exception ex) {
766 +                    threadUnexpectedException(ex);
767 +                }
768 +        } finally {
769 +            joinPool(pool);
770 +        }
771 +    }
772 +
773      /**
774       * A debugging tool to print all stack traces, as jstack does.
775       */

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