org.apache.flink.runtime.checkpoint

Class StateForTask

java.lang.Object

org.apache.flink.runtime.checkpoint.StateForTask

All Implemented Interfaces:

Serializable

public class StateForTask
extends Object
implements Serializable

Simple bean to describe the state belonging to a parallel operator. Since we hold the state across execution attempts, we identify a task by its JobVertexId and subtask index. The state itself is kept in serialized from, since the checkpoint coordinator itself is never looking at it anyways and only sends it back out in case of a recovery. Furthermore, the state may involve user-defined classes that are not accessible without the respective classloader.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
StateForTask(SerializedValue<StateHandle<?>> state, long stateSize, JobVertexID operatorId, int subtask, long duration)

Method Summary

Methods

Modifier and Type	Method and Description
void	discard(ClassLoader userClassLoader)
boolean	equals(Object o)
long	getDuration()
JobVertexID	getOperatorId()
SerializedValue<StateHandle<?>>	getState()
long	getStateSize()
int	getSubtask()
int	hashCode()
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

StateForTask

public StateForTask(SerializedValue<StateHandle<?>> state,
            long stateSize,
            JobVertexID operatorId,
            int subtask,
            long duration)

Method Detail

getState

public SerializedValue<StateHandle<?>> getState()

getStateSize

public long getStateSize()

getOperatorId

public JobVertexID getOperatorId()

getSubtask

public int getSubtask()

getDuration

public long getDuration()

discard

public void discard(ClassLoader userClassLoader)

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object