How to use

getNumberOfParallelSubtasks

method

in

org.apache.flink.api.common.TaskInfo

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

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

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

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

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

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

/**
 * Returns the current number of subtasks the respective task is split into.
 * 
 * @return the current number of subtasks the respective task is split into
 */
public int getCurrentNumberOfSubtasks() {
  return this.environment.getTaskInfo().getNumberOfParallelSubtasks();
}

/**
 * Returns the current number of subtasks the respective task is split into.
 *
 * @return the current number of subtasks the respective task is split into
 */
public int getCurrentNumberOfSubtasks() {
  return this.environment.getTaskInfo().getNumberOfParallelSubtasks();
}

/**
 * Returns the current number of subtasks the respective task is split into.
 *
 * @return the current number of subtasks the respective task is split into
 */
public int getCurrentNumberOfSubtasks() {
  return this.environment.getTaskInfo().getNumberOfParallelSubtasks();
}

/**
 * Returns the current number of subtasks the respective task is split into.
 * 
 * @return the current number of subtasks the respective task is split into
 */
public int getCurrentNumberOfSubtasks() {
  return this.environment.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() + ')';
}

/**
 * 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() + ')';
}

/**
 * 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() + ')';
}

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

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

format.open(this.getEnvironment().getTaskInfo().getIndexOfThisSubtask(), this.getEnvironment().getTaskInfo().getNumberOfParallelSubtasks());

private void initKeyedState() {
  try {
    TypeSerializer<Object> keySerializer = config.getStateKeySerializer(getUserCodeClassloader());
    // create a keyed state backend if there is keyed state, as indicated by the presence of a key serializer
    if (null != keySerializer) {
      KeyGroupRange subTaskKeyGroupRange = KeyGroupRangeAssignment.computeKeyGroupRangeForOperatorIndex(
          container.getEnvironment().getTaskInfo().getMaxNumberOfParallelSubtasks(),
          container.getEnvironment().getTaskInfo().getNumberOfParallelSubtasks(),
          container.getEnvironment().getTaskInfo().getIndexOfThisSubtask());
      this.keyedStateBackend = container.createKeyedStateBackend(
          keySerializer,
          // The maximum parallelism == number of key group
          container.getEnvironment().getTaskInfo().getMaxNumberOfParallelSubtasks(),
          subTaskKeyGroupRange);
      this.keyedStateStore = new DefaultKeyedStateStore(keyedStateBackend, getExecutionConfig());
    }
  } catch (Exception e) {
    throw new IllegalStateException("Could not initialize keyed state backend.", e);
  }
}

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

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