org.apache.flink.runtime.instance

Class Slot

java.lang.Object

org.apache.flink.runtime.instance.Slot

Direct Known Subclasses:

SharedSlot, SimpleSlot

public abstract class Slot
extends Object

Base class for slots.

Field Summary

Fields

Modifier and Type	Field and Description
protected static int	ALLOCATED_AND_ALIVE
protected static int	CANCELLED
protected Instance	instance The instance on which the slot is allocated
protected JobID	jobID The ID of the job this slice belongs to.
protected static int	RELEASED
protected int	slotNumber The number of the slot on which the task is deployed
protected int	status The state of the vertex, only atomically updated
protected static AtomicIntegerFieldUpdater<Slot>	STATUS_UPDATER

Constructor Summary

Constructors

Constructor and Description
Slot(JobID jobID, Instance instance, int slotNumber, SharedSlot parent, AbstractID groupID)

Method Summary

Methods

Modifier and Type	Method and Description
abstract void	cancel()
AbstractID	getGroupID()
Instance	getInstance()
JobID	getJobID() Returns the ID of the job this allocated slot belongs to.
abstract int	getNumberLeaves()
SharedSlot	getParent()
Slot	getRoot()
int	getSlotNumber()
protected String	hierarchy()
boolean	isAlive()
boolean	isCanceled()
boolean	isDead()
boolean	isDisposed()
boolean	isReleased()
boolean	markCancelled()
boolean	markDead() Marks this shared slot to be dead.
boolean	markDisposed()
boolean	markReleased()
abstract void	releaseSlot()
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

STATUS_UPDATER

protected static final AtomicIntegerFieldUpdater<Slot> STATUS_UPDATER

ALLOCATED_AND_ALIVE

protected static final int ALLOCATED_AND_ALIVE

See Also:

Constant Field Values

CANCELLED

protected static final int CANCELLED

See Also:

Constant Field Values

RELEASED

protected static final int RELEASED

See Also:

Constant Field Values

jobID

protected final JobID jobID

The ID of the job this slice belongs to.

instance

protected final Instance instance

The instance on which the slot is allocated

slotNumber

protected final int slotNumber

The number of the slot on which the task is deployed

status

protected volatile int status

The state of the vertex, only atomically updated

Constructor Detail

Slot

public Slot(JobID jobID,
    Instance instance,
    int slotNumber,
    SharedSlot parent,
    AbstractID groupID)

Method Detail

getJobID

public JobID getJobID()

Returns the ID of the job this allocated slot belongs to.

Returns:

the ID of the job this allocated slot belongs to

getInstance

public Instance getInstance()

getSlotNumber

public int getSlotNumber()

getGroupID

public AbstractID getGroupID()

getParent

public SharedSlot getParent()

getRoot

public Slot getRoot()

getNumberLeaves

public abstract int getNumberLeaves()

isAlive

public boolean isAlive()

isCanceled

public boolean isCanceled()

isReleased

public boolean isReleased()

cancel

public abstract void cancel()

releaseSlot

public abstract void releaseSlot()

markReleased

public boolean markReleased()

markCancelled

public boolean markCancelled()

markDead

public boolean markDead()

Marks this shared slot to be dead. Returns if the slot was alive before. Should only be called through the SlotSharingGroupAssignment attribute assignmentGroup.

Returns:

if the slot was alive before

isDead

public boolean isDead()

markDisposed

public boolean markDisposed()

isDisposed

public boolean isDisposed()

toString

public String toString()

Overrides:

toString in class Object

hierarchy

protected String hierarchy()