Package org.apache.hadoop.mapreduce.v2.api.records

Class TaskId

java.lang.Object
org.apache.hadoop.mapreduce.v2.api.records.TaskId
All Implemented Interfaces:
Comparable<TaskId>
Direct Known Subclasses:
TaskIdPBImpl
public abstract class TaskId extends Object implements Comparable<TaskId>

TaskId represents the unique identifier for a Map or Reduce Task.

TaskId consists of 3 parts. First part is JobId, that this Task belongs to. Second part of the TaskId is either 'm' or 'r' representing whether the task is a map task or a reduce task. And the third part is the task number.

  • Field Details

  • Constructor Details

    • TaskId

      public TaskId()

  • Method Details

    • getJobId

      public abstract JobId getJobId()
      Returns:
      the associated JobId

    • getTaskType

      public abstract TaskType getTaskType()
      Returns:
      the type of the task - MAP/REDUCE

    • getId

      public abstract int getId()
      Returns:
      the task number.

    • setJobId

      public abstract void setJobId(JobId jobId)

    • setTaskType

      public abstract void setTaskType(TaskType taskType)

    • setId

      public abstract void setId(int id)

    • hashCode

      public int hashCode()
      Overrides:
      hashCode in class Object

    • equals

      public boolean equals(Object obj)
      Overrides:
      equals in class Object

    • toString

      public String toString()
      Overrides:
      toString in class Object

    • compareTo

      public int compareTo(TaskId other)
      Specified by:
      compareTo in interface Comparable<TaskId>