How to use

getIndexOfThisSubtask

method

in

org.apache.flink.api.common.TaskInfo

@Override
public int getIndexOfThisSubtask() {
  return taskInfo.getIndexOfThisSubtask();
}

@Override
public void init() throws Exception {
  final String iterationId = getConfiguration().getIterationId();
  if (iterationId == null || iterationId.length() == 0) {
    throw new Exception("Missing iteration ID in the task configuration");
  }
  final String brokerID = StreamIterationHead.createBrokerIdString(getEnvironment().getJobID(), iterationId,
      getEnvironment().getTaskInfo().getIndexOfThisSubtask());
  final long iterationWaitTime = getConfiguration().getIterationWaitTime();
  LOG.info("Iteration tail {} trying to acquire feedback queue under {}", getName(), brokerID);
  @SuppressWarnings("unchecked")
  BlockingQueue<StreamRecord<IN>> dataChannel =
      (BlockingQueue<StreamRecord<IN>>) BlockingQueueBroker.INSTANCE.get(brokerID);
  LOG.info("Iteration tail {} acquired feedback queue {}", getName(), brokerID);
  this.headOperator = new RecordPusher<>();
  this.headOperator.setup(this, getConfiguration(), new IterationTailOutput<>(dataChannel, iterationWaitTime));
  // call super.init() last because that needs this.headOperator to be set up
  super.init();
}

operatorID,
operatorClassName,
taskInfo.getIndexOfThisSubtask(),
taskInfo.getNumberOfParallelSubtasks());

getEnvironment().getTaskInfo().getIndexOfThisSubtask());

when(mockTaskInfo.getIndexOfThisSubtask()).thenReturn(0);
Environment mockEnvironment = new MockEnvironmentBuilder().build();

taskInfo.getMaxNumberOfParallelSubtasks(),
taskInfo.getNumberOfParallelSubtasks(),
taskInfo.getIndexOfThisSubtask());

int numKeyGroups = getEnvironment().getTaskInfo().getMaxNumberOfParallelSubtasks();
int numSubtasks = getEnvironment().getTaskInfo().getNumberOfParallelSubtasks();
int subtaskIndex = getEnvironment().getTaskInfo().getIndexOfThisSubtask();

@Override
public int getIndexOfThisSubtask() {
  return taskInfo.getIndexOfThisSubtask();
}

@Override
public int getIndexOfThisSubtask() {
  return taskInfo.getIndexOfThisSubtask();
}

/**
 * Returns the index of this subtask in the subtask group.
 * 
 * @return the index of this subtask in the subtask group
 */
public int getIndexInSubtaskGroup() {
  return this.environment.getTaskInfo().getIndexOfThisSubtask();
}

/**
 * Returns the index of this subtask in the subtask group.
 *
 * @return the index of this subtask in the subtask group
 */
public int getIndexInSubtaskGroup() {
  return this.environment.getTaskInfo().getIndexOfThisSubtask();
}

/**
 * Returns the index of this subtask in the subtask group.
 *
 * @return the index of this subtask in the subtask group
 */
public int getIndexInSubtaskGroup() {
  return this.environment.getTaskInfo().getIndexOfThisSubtask();
}

/**
 * Returns the index of this subtask in the subtask group.
 * 
 * @return the index of this subtask in the subtask group
 */
public int getIndexInSubtaskGroup() {
  return this.environment.getTaskInfo().getIndexOfThisSubtask();
}

private String createOperatorIdentifier(StreamOperator<?> operator, int vertexId) {
  return operator.getClass().getSimpleName() +
      "_" + vertexId +
      "_" + getEnvironment().getTaskInfo().getIndexOfThisSubtask();
}

/**
 * Utility function that composes a string for logging purposes. The string includes the given message,
 * the given name of the task and the index in its subtask group as well as the number of instances
 * that exist in its subtask group.
 *
 * @param message The main message for the log.
 * @param taskName The name of the task.
 * @param parent The task that contains the code producing the message.
 *
 * @return The string for logging.
 */
public static String constructLogString(String message, String taskName, AbstractInvokable parent) {
  return message + ":  " + taskName + " (" + (parent.getEnvironment().getTaskInfo().getIndexOfThisSubtask() + 1) +
      '/' + parent.getEnvironment().getTaskInfo().getNumberOfParallelSubtasks() + ')';
}

/**
 * Utility function that composes a string for logging purposes. The string includes the given message,
 * the given name of the task and the index in its subtask group as well as the number of instances
 * that exist in its subtask group.
 *
 * @param message The main message for the log.
 * @param taskName The name of the task.
 * @param parent The task that contains the code producing the message.
 *
 * @return The string for logging.
 */
public static String constructLogString(String message, String taskName, AbstractInvokable parent) {
  return message + ":  " + taskName + " (" + (parent.getEnvironment().getTaskInfo().getIndexOfThisSubtask() + 1) +
      '/' + parent.getEnvironment().getTaskInfo().getNumberOfParallelSubtasks() + ')';
}

public String brokerKey() {
  if (brokerKey == null) {
    int iterationId = config.getIterationId();
    brokerKey = getEnvironment().getJobID().toString() + '#' + iterationId + '#' +
        getEnvironment().getTaskInfo().getIndexOfThisSubtask();
  }
  return brokerKey;
}

public String brokerKey() {
  if (brokerKey == null) {
    int iterationId = config.getIterationId();
    brokerKey = getEnvironment().getJobID().toString() + '#' + iterationId + '#' +
        getEnvironment().getTaskInfo().getIndexOfThisSubtask();
  }
  return brokerKey;
}

public String brokerKey() {
  if (brokerKey == null) {
    int iterationId = config.getIterationId();
    brokerKey = getEnvironment().getJobID().toString() + '#' + iterationId + '#' +
        getEnvironment().getTaskInfo().getIndexOfThisSubtask();
  }
  return brokerKey;
}

public String brokerKey() {
  if (brokerKey == null) {
    int iterationId = config.getIterationId();
    brokerKey = getEnvironment().getJobID().toString() + '#' + iterationId + '#' +
        getEnvironment().getTaskInfo().getIndexOfThisSubtask();
  }
  return brokerKey;
}