Examples of java.util.concurrent.Callable

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

    * @return new instance of Callable<?> whose call() method either throws an exception or returns null if the task
    *         was successfull.
    */
   protected Callable<?> createPushStateTask()
   {
      return new Callable()
      {
         public Object call() throws Exception
         {
            final boolean debugEnabled = log.isDebugEnabled();

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      }


      @Override
      protected Callable<?> createPushStateTask()
      {
         return new Callable()
         {
            public Object call() throws Exception
            {
               numberCreatedTasks++;
               try

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    *
    * @return new instance of Callable<?> whose call() method either throws an exception or returns null if the task was
    *         successfull.
    */
   protected Callable<?> createPushStateTask() {
      return new Callable() {
         public Object call() throws Exception {
            final boolean debugEnabled = log.isDebugEnabled();


            if (debugEnabled) log.debug("start pushing in-memory state to cache cacheLoader");
            pushState(cache);

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    *
    * @return new instance of Callable<?> whose call() method either throws an exception or returns null if the task was
    *         successfull.
    */
   protected Callable<?> createPushStateTask() {
      return new Callable() {
         public Object call() throws Exception {
            final boolean debugEnabled = log.isDebugEnabled();


            if (debugEnabled) log.debug("start pushing in-memory state to cache cacheLoader");
            pushState(cache);

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    *
    * @return new instance of Callable<?> whose call() method either throws an exception or returns null if the task was
    *         successfull.
    */
   protected Callable<?> createPushStateTask() {
      return new Callable() {
         public Object call() throws Exception {
            final boolean debugEnabled = log.isDebugEnabled();


            if (debugEnabled) log.debug("start pushing in-memory state to cache cacheLoader");
            pushState(cache);

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    // helper method to apply migration on the migration stage. typical migration failures will throw an 
    // InvalidRequestException. atypical failures will throw a RuntimeException.
    private static void applyMigrationOnStage(final Migration m) throws InvalidRequestException
    {
        Future f = StageManager.getStage(Stage.MIGRATION).submit(new Callable()
        {
            public Object call() throws Exception
            {
                m.apply();
                m.announce();

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  {
    Collection<Class<?>> classes = new ArrayList<Class<?>>(Arrays.asList(Callable.class));
    TestListener tl = new TestListener();
    TestCallable tc = new TestCallable();
    
    Callable o = (Callable) InterfaceProxyGenerator.getProxyInstance(testBundle, 
        null, classes, tc, tl);
    
    assertCalled(tl, false, false, false);
    
    assertNull(null, o.call());
    
    assertCalled(tl, true, true, false);
    
    assertEquals(Callable.class.getMethod("call"), 
        tl.getLastMethod());


    tl.clear();
    assertCalled(tl, false, false, false);
    
    tc.setReturn(new Callable<Object>() {


 
      public Object call() throws Exception {
        throw new RuntimeException();
      }
    });
    try {
      o.call();
      fail("Should throw an exception");
    } catch (RuntimeException re) {
      assertCalled(tl, true, false, true);
      assertSame(re, tl.getLastThrowable());
    }
    
    tl.clear();
    assertCalled(tl, false, false, false);
    
    tc.setReturn(new Callable<Object>() {


     
      public Object call() throws Exception {
        try {
          throw new RuntimeException();
        } catch (RuntimeException re) {
          return new Object();
        }
      }
    });
    
    
    try {
      assertNotNull(o.call());
    } finally {
      assertCalled(tl, true, true, false);
    }
  }

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  protected Object getProxyInstance(Class<?> proxyClass) {
    try {
      if(proxyClass.getName().equals(ProxyTestClassAbstract.class.getName())) {
        Collection<Class<?>> coll = new ArrayList<Class<?>>();
        coll.add(proxyClass);
        return new AsmProxyManager().createNewProxy(null, coll, new Callable() {
          public Object call() throws Exception {
            return null;
          }}, null);
      }
      return proxyClass.newInstance();

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    Skeleton.getSkeleton(b).setReturnValue(new MethodCall(
        ClassLoaderProxy.class, "getClassLoader"), weavingLoader);
    
    Object toCall = new AsmProxyManager().createDelegatingProxy(b, Arrays.asList(
        getProxyClass(ProxyTestClassAbstract.class), Callable.class), new Callable() {


          public Object call() throws Exception {
            return weavingLoader.loadClass(ProxyTestClassChildOfAbstract.class.getName()).newInstance();
          }

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  @Test
  public void testFinalClass() throws Exception
  {
    try {
      InterfaceProxyGenerator.getProxyInstance(null, FINAL_CLASS, Collections.EMPTY_SET, 
          new Callable() {
        public Object call() throws Exception {
          return null;
        }} , null).getClass();
    } catch (FinalModifierException e) {
      assertTrue("Should have found final class", e.isFinalClass());

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