Package co.cask.cdap.api.annotation

Examples of co.cask.cdap.api.annotation.HashPartition


   * @param method The process method to inspect.
   * @return A new instance of {@link ConsumerConfig}.
   */
  private ConsumerConfig getConsumerConfig(BasicFlowletContext flowletContext, Method method) {
    // Determine input queue partition type
    HashPartition hashPartition = method.getAnnotation(HashPartition.class);
    RoundRobin roundRobin = method.getAnnotation(RoundRobin.class);
    DequeueStrategy strategy = DequeueStrategy.FIFO;
    String hashKey = null;

    Preconditions.checkArgument(!(hashPartition != null && roundRobin != null),
                                "Only one strategy allowed for process() method: %s", method.getName());

    if (hashPartition != null) {
      strategy = DequeueStrategy.HASH;
      hashKey = hashPartition.value();
      Preconditions.checkArgument(!hashKey.isEmpty(), "Partition key cannot be empty: %s", method.getName());
    } else if (roundRobin != null) {
      strategy = DequeueStrategy.ROUND_ROBIN;
    }

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