Examples of java.util.concurrent.ExecutionException

java.util.concurrent.ExecutionException
Emulation of ExecutionException. @author Charles Fry

      }


      @Override
      public V get(long timeout, TimeUnit unit) throws InterruptedException, ExecutionException, TimeoutException
      {
         throw new ExecutionException(exception);
      }

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         if (isCancelled())
            throw new CancellationException("MapReduceTask already cancelled");
         try {
            return call.call();
         } catch (Exception e) {
            throw new ExecutionException(e);
         } finally {
            done = true;
         }
      }

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      public abstract void execute();


      @SuppressWarnings("unchecked")
      private V retrieveResult(Object response) throws ExecutionException {
         if (response == null) {
            throw new ExecutionException("Execution returned null value",
                     new NullPointerException());
         }
         if (response instanceof Exception) {
            throw new ExecutionException((Exception) response);
         }


         Map<Address, Response> mapResult = (Map<Address, Response>) response;
         assert mapResult.size() == 1;
         for (Entry<Address, Response> e : mapResult.entrySet()) {
            if (e.getValue() instanceof SuccessfulResponse) {
               return (V) ((SuccessfulResponse) e.getValue()).getResponseValue();
            }
         }
         throw new ExecutionException(new IllegalStateException("Invalid response " + response));
      }

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         Future<Integer> val = des.submit(task, new String[] {"key1"});
         val.get();
         throw new IllegalStateException("Should have thrown exception");
      }  catch (Exception e){
         assert e instanceof ExecutionException;
         ExecutionException ee = (ExecutionException)e;
         boolean duplicateEEInChain = ee.getCause() instanceof ExecutionException;
         AssertJUnit.assertEquals(false, duplicateEEInChain);
      }
      finally {
         des.shutdownNow();
         TestingUtil.killCacheManagers(cacheManager, cacheManager1);

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         Future<Integer> val = des.submit(task, new String[] {"key1"});
         val.get();
         throw new IllegalStateException("Should have thrown exception");
      } catch (Exception e) {
         assert e instanceof ExecutionException;
         ExecutionException ee = (ExecutionException) e;
         boolean duplicateEEInChain = ee.getCause() instanceof ExecutionException;
         AssertJUnit.assertEquals(false, duplicateEEInChain);
      }
      finally {
         des.shutdownNow();
         TestingUtil.killCacheManagers(cacheManager);

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            @Override
            public Cache<String, String> get() throws InterruptedException, ExecutionException {
               try {
                  return cacheCreator.call();
               } catch (Exception e) {
                  throw new ExecutionException(e);
               }
            }
         };
      }
   }

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     */
    @Test
    public void testHandleCauseChecked() {
        Exception ex = new Exception("Test");
        try {
            ConcurrentUtils.handleCause(new ExecutionException(ex));
            fail("ConcurrentException not thrown!");
        } catch (ConcurrentException cex) {
            assertEquals("Wrong cause", ex, cex.getCause());
        }
    }

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     * thrown.
     */
    @Test
    public void testHandleCauseNull() throws ConcurrentException {
        ConcurrentUtils.handleCause(null);
        ConcurrentUtils.handleCause(new ExecutionException("Test", null));
    }

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     */
    @Test
    public void testHandleCauseUncheckedError() {
        Error err = new AssertionError("Test");
        try {
            ConcurrentUtils.handleCauseUnchecked(new ExecutionException(err));
            fail("Error not thrown!");
        } catch (Error e) {
            assertEquals("Wrong error", err, e);
        }
    }

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     */
    @Test
    public void testHandleCauseUncheckedUncheckedException() {
        RuntimeException rex = new RuntimeException("Test");
        try {
            ConcurrentUtils.handleCauseUnchecked(new ExecutionException(rex));
            fail("Runtime exception not thrown!");
        } catch (RuntimeException r) {
            assertEquals("Wrong exception", rex, r);
        }
    }

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