Examples of org.apache.uima.resource.Resource

org.apache.uima.resource.Resource
Resource is the general term for all UIMA components that can be acquired and used by an application (or by other resources).
Resources may be co-located with their client or distributed as services. This is made transparent to the client.
A {@link ResourceSpecifier} contains information that can be used acquire a reference to aResource, whether that is done by instantiating the resource locally or locating an existing resource available as a service.
The {@link org.apache.uima.ResourceFactory} takes a ResourceSpecifier and returnsan instance of the specified Resource. Again, this can be done by creating the instance or by locating an existing instance.
Most applications will not need to deal with this abstract Resource interface. UIMA Developers who need to introduce new types of Resources, however, will need to implement this interface.

   *         which case the client may wait on this object in order to be notified when an instance
   *         becomes available).
   */
  public synchronized Resource getResource() {
    if (!mFreeInstances.isEmpty()) {
      Resource r = (Resource) mFreeInstances.remove(0);
      /*
       * UIMAFramework.getLogger().log( "Acquired resource " + r.getMetaData().getUUID() + " from
       * pool.");
       */
      return r;

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   *         which case the client may wait on this object in order to be notified when an instance
   *         becomes available).
   */
  public synchronized Resource getResource(long aTimeout) {
    long startTime = new Date().getTime();
    Resource resource;
    while ((resource = getResource()) == null) {
      try {
        wait(aTimeout);
      } catch (InterruptedException e) {
      }

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   * Destroys all Resources in this pool.
   */
  public synchronized void destroy() {
    Iterator i = mAllInstances.iterator();
    while (i.hasNext()) {
      Resource current = (Resource) i.next();
      current.destroy();
    }
    mAllInstances.clear();
    mFreeInstances.clear();
  }

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  public void destroy() {
    // destroy component AnalysisEngines
    Iterator i = mComponentAnalysisEngineMap.entrySet().iterator();
    while (i.hasNext()) {
      Map.Entry entry = (Map.Entry) i.next();
      Resource delegate = (Resource) entry.getValue();
      delegate.destroy();
    }
    if (mFlowControllerContainer != null) {
      mFlowControllerContainer.destroy();
    }
  }

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  public void testGetResource() throws Exception {
    try {
      Assert.assertEquals(3, pool1.getFreeInstances().size());


      // get two resources
      Resource foo = pool1.getResource();
      Assert.assertNotNull(foo);
      Assert.assertEquals(2, pool1.getFreeInstances().size());


      Resource bar = pool1.getResource();
      Assert.assertNotNull(bar);
      Assert.assertTrue(!foo.equals(bar));
      Assert.assertEquals(1, pool1.getFreeInstances().size());


      // get two more resources (should exhaust pool)
      Resource a = pool1.getResource();
      Assert.assertNotNull(a);
      Assert.assertEquals(0, pool1.getFreeInstances().size());


      Resource b = pool1.getResource();
      Assert.assertNull(b);
      Assert.assertEquals(0, pool1.getFreeInstances().size());
    } catch (Exception e) {
      JUnitExtension.handleException(e);
    }

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    try {
      // ask for resources with timeout of 2 seconds. should respond quickly
      // until resources are exhausted, then it will pause 2 seconds before
      // returning null
      long startTime = System.currentTimeMillis();
      Resource foo = pool1.getResource(2000);
      Assert.assertNotNull(foo);
      Assert.assertTrue(System.currentTimeMillis() - startTime < 1000);


      startTime = System.currentTimeMillis();
      Resource bar = pool1.getResource(2000);
      Assert.assertNotNull(bar);
      Assert.assertTrue(!foo.equals(bar));
      Assert.assertTrue(System.currentTimeMillis() - startTime < 1000);


      startTime = System.currentTimeMillis();
      Resource a = pool1.getResource(2000);
      Assert.assertNotNull(a);
      Assert.assertTrue(System.currentTimeMillis() - startTime < 1000);


      startTime = System.currentTimeMillis();
      Resource b = pool1.getResource(2000);
      Assert.assertNull(b);
      Assert.assertTrue(System.currentTimeMillis() - startTime >= 2000);


      // Start a thread that will release "foo" in 1 second. Demonstrate that
      // getResource() will not acquire a resource but getResource(2000) will.

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  public void testReleaseResource() throws Exception {
    try {
      // acquire all the resources
      Assert.assertEquals(3, pool1.getFreeInstances().size());
      Resource foo = pool1.getResource();
      Resource bar = pool1.getResource();
      Resource blah = pool1.getResource();
      Assert.assertEquals(0, pool1.getFreeInstances().size());


      // release one
      pool1.releaseResource(foo);
      Assert.assertEquals(1, pool1.getFreeInstances().size());


      // try to release "foo" again - should not change the free instances count
      // this will log a warning - first we log that this is expected
      UIMAFramework.getLogger().log(Level.WARNING, "Unit test is expecting to log ResourcePool warning.");
      pool1.releaseResource(foo);
      Assert.assertEquals(1, pool1.getFreeInstances().size());


      // show that we can then check out a new one
      Resource test = pool1.getResource();
      Assert.assertNotNull(test);
      Assert.assertEquals(0, pool1.getFreeInstances().size());


      // release the others
      pool1.releaseResource(test);

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  }


  public void testDestroy() throws Exception {
    try {
      // do some stuff
      Resource foo = pool1.getResource();
      Resource bar = pool1.getResource();
      Resource a = pool1.getResource();
      pool1.releaseResource(foo);
      Resource b = pool1.getResource();
      pool1.releaseResource(b);


      // now some stuff should be recorded in the pool
      Assert.assertTrue(!pool1.getFreeInstances().isEmpty());

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      } else if (current instanceof TypePriorities) {
        ProcessingResourceMetaData md = new ProcessingResourceMetaData_impl();
        md.setTypePriorities((TypePriorities) current);
        mdList.add(md);
      } else if (current instanceof ResourceSpecifier) {
        Resource resource = UIMAFramework.produceResource((ResourceSpecifier) current,
                Collections.EMPTY_MAP);
        ResourceMetaData metadata = resource.getMetaData();
        if (metadata instanceof ProcessingResourceMetaData) {
          mdList.add(metadata);
        }
        resource.destroy();
      } else {
        throw new ResourceInitializationException(
                ResourceInitializationException.UNSUPPORTED_OBJECT_TYPE_IN_CREATE_CAS,
                new Object[] { current.getClass().getName() });
      }

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    // destroy component AnalysisEngines that have been successfully initialized
    //   unsuccessful initializations are not put into the Map
    Iterator<Map.Entry<String, AnalysisEngine>> i = mComponentAnalysisEngineMap.entrySet().iterator();
    while (i.hasNext()) {
      Map.Entry<String, AnalysisEngine> entry = i.next();
      Resource delegate = entry.getValue();
      delegate.destroy();
    }
    
    if (mFlowControllerContainer != null &&
        // the container might be non-null, but the initialization could have failed
        mFlowControllerContainer.isInitialized()) {

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