org.apache.flink.api.common

Class TaskInfo

java.lang.Object

org.apache.flink.api.common.TaskInfo

@Internal
public class TaskInfo
extends Object

Encapsulates task-specific information: name, index of subtask, parallelism and attempt number.

Constructor Summary

Constructors

Constructor and Description
TaskInfo(String taskName, int indexOfSubtask, int numberOfParallelSubtasks, int attemptNumber)

Method Summary

Modifier and Type	Method and Description
int	getAttemptNumber() Gets the attempt number of this parallel subtask.
int	getIndexOfThisSubtask() Gets the number of this parallel subtask.
int	getNumberOfParallelSubtasks() Gets the parallelism with which the parallel task runs.
String	getTaskName() Returns the name of the task
String	getTaskNameWithSubtasks() Returns the name of the task, appended with the subtask indicator, such as "MyTask (3/6)", where 3 would be (getIndexOfThisSubtask() + 1), and 6 would be getNumberOfParallelSubtasks().

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

TaskInfo

public TaskInfo(String taskName,
                int indexOfSubtask,
                int numberOfParallelSubtasks,
                int attemptNumber)

Method Detail

getTaskName

public String getTaskName()

Returns the name of the task

Returns:

The name of the task

getIndexOfThisSubtask

public int getIndexOfThisSubtask()

Gets the number of this parallel subtask. The numbering starts from 0 and goes up to parallelism-1 (parallelism as returned by getNumberOfParallelSubtasks()).

Returns:

The index of the parallel subtask.

getNumberOfParallelSubtasks

public int getNumberOfParallelSubtasks()

Gets the parallelism with which the parallel task runs.

Returns:

The parallelism with which the parallel task runs.

getAttemptNumber

public int getAttemptNumber()

Gets the attempt number of this parallel subtask. First attempt is numbered 0. The attempt number corresponds to the number of times this task has been restarted(after failure/cancellation) since the job was initially started.

Returns:

Attempt number of the subtask.

getTaskNameWithSubtasks

public String getTaskNameWithSubtasks()

Returns the name of the task, appended with the subtask indicator, such as "MyTask (3/6)", where 3 would be (getIndexOfThisSubtask() + 1), and 6 would be getNumberOfParallelSubtasks().

Returns:

The name of the task, with subtask indicator.