org.apache.curator.framework.api.BackgroundPathable Java Examples

public static boolean exists(CuratorFramework client, String path, CuratorWatcher watcher) {
    try {
        if (watcher != null) {
            return ((BackgroundPathable) client.checkExists().usingWatcher(watcher)).forPath(path) != null;
        }
        return client.checkExists().forPath(path) != null;
    } catch (Exception e) {
        LOGGER.error("ZKUtil-->>exists(CuratorFramework client, String path, CuratorWatcher watcher) error, ", e);
    }
    return false;
}
 

private <T, P extends Watchable<BackgroundPathable<T>> & BackgroundPathable<T>> Pathable<T> maybeWatch(
    P dataBuilder) {
    if (disableZkWatches) {
        return dataBuilder.inBackground(this);
    } else {
        return dataBuilder.usingWatcher(this).inBackground(this);
    }
}
 

public static List<String> getChilds(CuratorFramework client, String path, CuratorWatcher watcher) {
    try {
        if (watcher != null) {
            return (List) ((BackgroundPathable) client.getChildren().usingWatcher(watcher)).forPath(path);
        }
        return (List) client.getChildren().forPath(path);
    } catch (Exception e) {
        LOGGER.error("ZKUtil-->>getChilds(CuratorFramework client, String path, CuratorWatcher watcher) error,", e);
    }
    return null;
}
 

public static String getData(CuratorFramework client, String path, CuratorWatcher watcher) {
    try {
        if (client.checkExists().forPath(path) == null) {
            return null;
        }
        if (watcher != null) {
            return List2StringUtil
                    .toString((byte[]) ((BackgroundPathable) client.getData().usingWatcher(watcher)).forPath(path));
        }
        return List2StringUtil.toString((byte[]) client.getData().forPath(path));
    } catch (Exception e) {
        LOGGER.error("ZKUtil-->>getData(CuratorFramework client, String path, CuratorWatcher watcher)  error ", e);
    }
    return null;
}
 

/**
 * Test deleteNode method
 * @throws Exception
 */
@Test
public void testDeleteNode() throws Exception {
  CuratorStateManager spyStateManager = spy(new CuratorStateManager());
  CuratorFramework mockClient = mock(CuratorFramework.class);
  DeleteBuilder mockDeleteBuilder = mock(DeleteBuilder.class);
  // Mockito doesn't support mock type-parametrized class, thus suppress the warning
  @SuppressWarnings("rawtypes")
  BackgroundPathable mockBackPathable = mock(BackgroundPathable.class);

  doReturn(mockClient)
      .when(spyStateManager).getCuratorClient();
  doReturn(true)
      .when(mockClient).blockUntilConnected(anyInt(), any(TimeUnit.class));
  doReturn(mockDeleteBuilder)
      .when(mockClient).delete();
  doReturn(mockBackPathable)
      .when(mockDeleteBuilder).withVersion(-1);

  spyStateManager.initialize(config);

  ListenableFuture<Boolean> result = spyStateManager.deleteExecutionState(PATH);

  // Verify the node is deleted correctly
  verify(mockDeleteBuilder).withVersion(-1);
  assertTrue(result.get());
}
 

@Override
public BackgroundPathable<T> usingWatcher(CuratorWatcher curatorWatcher) {
    throw new UnsupportedOperationException("Not implemented in MockCurator");
}
 

@Override
public BackgroundPathable<Void> withVersion(int i) {
    throw new UnsupportedOperationException("Not implemented in MockCurator");
}
 

@Override
public BackgroundPathable<T> usingWatcher(Watcher watcher) {
    throw new UnsupportedOperationException("Not implemented in MockCurator");
}
 

/**
 * Test getNodeData method
 * @throws Exception
 */
@Test
public void testGetNodeData() throws Exception {
  CuratorStateManager spyStateManager = spy(new CuratorStateManager());
  final CuratorFramework mockClient = mock(CuratorFramework.class);
  GetDataBuilder mockGetBuilder = mock(GetDataBuilder.class);
  // Mockito doesn't support mock type-parametrized class, thus suppress the warning
  @SuppressWarnings("rawtypes")
  BackgroundPathable mockBackPathable = mock(BackgroundPathable.class);
  final CuratorEvent mockEvent = mock(CuratorEvent.class);
  Message.Builder mockBuilder = mock(Message.Builder.class);
  Message mockMessage = mock(Message.class);

  final byte[] data = "wy_1989".getBytes();

  doReturn(mockMessage)
      .when(mockBuilder).build();
  doReturn(data)
      .when(mockEvent).getData();
  doReturn(PATH)
      .when(mockEvent).getPath();
  doReturn(mockClient)
      .when(spyStateManager).getCuratorClient();
  doReturn(true)
      .when(mockClient).blockUntilConnected(anyInt(), any(TimeUnit.class));
  doReturn(mockGetBuilder)
      .when(mockClient).getData();
  doReturn(mockBackPathable)
      .when(mockGetBuilder).usingWatcher(any(Watcher.class));
  doAnswer(new Answer<Object>() {
    @Override
    public Object answer(InvocationOnMock invocationOnMock) throws Throwable {
      Object[] objests = invocationOnMock.getArguments();
      // the first object is the BackgroundCallback
      ((BackgroundCallback) objests[0]).processResult(mockClient, mockEvent);
      return null;
    }
  }).when(mockBackPathable).inBackground(any(BackgroundCallback.class));

  spyStateManager.initialize(config);

  // Verify the data on node is fetched correctly
  ListenableFuture<Message> result = spyStateManager.getNodeData(null, PATH, mockBuilder);
  assertTrue(result.get().equals(mockMessage));
}
 

@Override
public BackgroundPathable<List<String>> watched()
{
    watching = new Watching(true);
    return this;
}
 

@Override
public BackgroundPathable<T> watched() {
    throw new UnsupportedOperationException("Not implemented in MockCurator");
}
 

@Override
public BackgroundPathable<List<String>> usingWatcher(CuratorWatcher watcher)
{
    watching = new Watching(client, watcher);
    return this;
}
 

@Override
public void usingWatcher(BackgroundPathable<?> backgroundPathable, String path) throws Exception {
    backgroundPathable.inBackground(callback, context, executor).forPath(path);
}
 

public void usingWatcher(BackgroundPathable<?> backgroundPathable, String path) throws Exception {
    backgroundPathable.forPath(path);
}
 

@Override
public BackgroundPathable<List<String>> watched()
{
    watching = new Watching(client, true);
    return this;
}
 

@Override
public BackgroundPathable<List<String>> usingWatcher(Watcher watcher)
{
    watching = new Watching(client, watcher);
    return this;
}
 

@Override
public BackgroundPathable<List<String>> usingWatcher(CuratorWatcher watcher)
{
    watching = new Watching(client, watcher);
    return this;
}
 

@Override
public BackgroundPathable<List<String>> usingWatcher(Watcher watcher)
{
    watching = new Watching(client, watcher);
    return this;
}