org.apache.flink.runtime.jobmanager.scheduler

Class DefaultExecutionListener

java.lang.Object

org.apache.flink.runtime.jobmanager.scheduler.DefaultExecutionListener

All Implemented Interfaces:

ExecutionListener

public class DefaultExecutionListener
extends Object
implements ExecutionListener

Constructor Summary

Constructors

Constructor and Description
DefaultExecutionListener(DefaultScheduler scheduler, ExecutionVertex executionVertex) Constructs a new wrapper object for the given ExecutionVertex.

Method Summary

Methods

Modifier and Type	Method and Description
void	executionStateChanged(JobID jobID, ExecutionVertexID vertexID, ExecutionState newExecutionState, String optionalMessage) Called when the execution state of the associated task has changed.
int	getPriority() Returns the priority of the execution listener object.
void	userThreadFinished(JobID jobID, ExecutionVertexID vertexID, Thread userThread) Called when a thread spawn by a user task has finished.
void	userThreadStarted(JobID jobID, ExecutionVertexID vertexID, Thread userThread) Called when the user task has started a new thread.

Methods inherited from class java.lang.Object

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

Constructor Detail

DefaultExecutionListener

public DefaultExecutionListener(DefaultScheduler scheduler,
                        ExecutionVertex executionVertex)

Constructs a new wrapper object for the given ExecutionVertex.

Parameters:

scheduler - the instance of the DefaultScheduler

executionVertex - the ExecutionVertex the received notification refer to

Method Detail

executionStateChanged

public void executionStateChanged(JobID jobID,
                         ExecutionVertexID vertexID,
                         ExecutionState newExecutionState,
                         String optionalMessage)

Description copied from interface: ExecutionListener

Called when the execution state of the associated task has changed. It is important to point out that multiple execution listeners can be invoked as a reaction to a state change, according to their priority. As a result, the value of newExecutionState may be out-dated by the time a particular execution listener is called. To determine the most recent state of the respective task, it is recommended to store a reference on the execution that represents it and then call getExecutionState() on the vertex within this method.

Specified by:

executionStateChanged in interface ExecutionListener

Parameters:

jobID - the ID of the job the task belongs to

vertexID - the ID of the task whose state has changed

newExecutionState - the execution state the task has just switched to

optionalMessage - an optional message providing further information on the state change

userThreadFinished

public void userThreadFinished(JobID jobID,
                      ExecutionVertexID vertexID,
                      Thread userThread)

Description copied from interface: ExecutionListener

Called when a thread spawn by a user task has finished.

Specified by:

userThreadFinished in interface ExecutionListener

Parameters:

jobID - the ID of the job the task belongs to

vertexID - the ID of the task whose thread has finished

userThread - the user thread which has finished

userThreadStarted

public void userThreadStarted(JobID jobID,
                     ExecutionVertexID vertexID,
                     Thread userThread)

Description copied from interface: ExecutionListener

Called when the user task has started a new thread.

Specified by:

userThreadStarted in interface ExecutionListener

Parameters:

jobID - the ID of the job the task belongs to

vertexID - the ID of the task that started of new thread

userThread - the user thread which has been started

getPriority

public int getPriority()

Description copied from interface: ExecutionListener

Returns the priority of the execution listener object. If multiple execution listener objects are registered for a given vertex, the priority determines in which order they will be called. Priorities are expressed as non-negative integer values. The lower the integer value, the higher the call priority.

Specified by:

getPriority in interface ExecutionListener

Returns:

the priority of this execution listener