Package org.apache.flink.runtime.jobmaster.slotpool

Class SingleLogicalSlot

java.lang.Object

org.apache.flink.runtime.jobmaster.slotpool.SingleLogicalSlot

All Implemented Interfaces:

LogicalSlot, PhysicalSlot.Payload

public class SingleLogicalSlot
extends Object
implements LogicalSlot, PhysicalSlot.Payload

Implementation of the LogicalSlot.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.flink.runtime.jobmaster.LogicalSlot

LogicalSlot.Payload

Field Summary

Fields inherited from interface org.apache.flink.runtime.jobmaster.LogicalSlot

TERMINATED_PAYLOAD

Constructor Summary

Constructors

Constructor	Description
SingleLogicalSlot(SlotRequestId slotRequestId, SlotContext slotContext, Locality locality, SlotOwner slotOwner)
SingleLogicalSlot(SlotRequestId slotRequestId, SlotContext slotContext, Locality locality, SlotOwner slotOwner, boolean willBeOccupiedIndefinitely)

Method Summary

Modifier and Type	Method	Description
static SingleLogicalSlot	allocateFromPhysicalSlot(SlotRequestId slotRequestId, PhysicalSlot physicalSlot, Locality locality, SlotOwner slotOwner, boolean slotWillBeOccupiedIndefinitely)
AllocationID	getAllocationId()	Gets the allocation id of this slot.
Locality	getLocality()	Gets the locality of this slot.
LogicalSlot.Payload	getPayload()	Returns the set payload or null if none.
SlotRequestId	getSlotRequestId()	Gets the slot request id uniquely identifying the request with which this slot has been allocated.
TaskManagerGateway	getTaskManagerGateway()	Return the TaskManager gateway to talk to the TaskManager.
TaskManagerLocation	getTaskManagerLocation()	Return the TaskManager location of this slot.
boolean	isAlive()	True if the slot is alive and has not been released.
void	release(Throwable cause)	A release of the payload by the AllocatedSlot triggers a release of the payload of the logical slot.
CompletableFuture<?>	releaseSlot(Throwable cause)	Releases this slot.
boolean	tryAssignPayload(LogicalSlot.Payload payload)	Tries to assign a payload to this slot.
boolean	willOccupySlotIndefinitely()	Returns whether the payload will occupy a physical slot indefinitely.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.flink.runtime.jobmaster.LogicalSlot

releaseSlot

Constructor Detail

SingleLogicalSlot

@VisibleForTesting
public SingleLogicalSlot(SlotRequestId slotRequestId,
                         SlotContext slotContext,
                         Locality locality,
                         SlotOwner slotOwner)

SingleLogicalSlot

public SingleLogicalSlot(SlotRequestId slotRequestId,
                         SlotContext slotContext,
                         Locality locality,
                         SlotOwner slotOwner,
                         boolean willBeOccupiedIndefinitely)

Method Detail

getTaskManagerLocation

public TaskManagerLocation getTaskManagerLocation()

Description copied from interface: LogicalSlot

Return the TaskManager location of this slot.

Specified by:

getTaskManagerLocation in interface LogicalSlot

Returns:

TaskManager location of this slot

getTaskManagerGateway

public TaskManagerGateway getTaskManagerGateway()

Description copied from interface: LogicalSlot

Return the TaskManager gateway to talk to the TaskManager.

Specified by:

getTaskManagerGateway in interface LogicalSlot

Returns:

TaskManager gateway to talk to the TaskManager

getLocality

public Locality getLocality()

Description copied from interface: LogicalSlot

Gets the locality of this slot.

Specified by:

getLocality in interface LogicalSlot

Returns:

locality of this slot

isAlive

public boolean isAlive()

Description copied from interface: LogicalSlot

True if the slot is alive and has not been released.

Specified by:

isAlive in interface LogicalSlot

Returns:

True if the slot is alive, otherwise false if the slot is released

tryAssignPayload

public boolean tryAssignPayload(LogicalSlot.Payload payload)

Description copied from interface: LogicalSlot

Tries to assign a payload to this slot. One can only assign a single payload once.

Specified by:

tryAssignPayload in interface LogicalSlot

Parameters:

payload - to be assigned to this slot.

Returns:

true if the payload could be assigned, otherwise false

getPayload

@Nullable
public LogicalSlot.Payload getPayload()

Description copied from interface: LogicalSlot

Returns the set payload or null if none.

Specified by:

getPayload in interface LogicalSlot

Returns:

Payload of this slot of null if none

releaseSlot

public CompletableFuture<?> releaseSlot(@Nullable
                                        Throwable cause)

Description copied from interface: LogicalSlot

Releases this slot.

Specified by:

releaseSlot in interface LogicalSlot

Parameters:

cause - why the slot was released or null if none

Returns:

future which is completed once the slot has been released

getAllocationId

public AllocationID getAllocationId()

Description copied from interface: LogicalSlot

Gets the allocation id of this slot. Multiple logical slots can share the same allocation id.

Specified by:

getAllocationId in interface LogicalSlot

Returns:

allocation id of this slot

getSlotRequestId

public SlotRequestId getSlotRequestId()

Description copied from interface: LogicalSlot

Gets the slot request id uniquely identifying the request with which this slot has been allocated.

Specified by:

getSlotRequestId in interface LogicalSlot

Returns:

Unique id identifying the slot request with which this slot was allocated

allocateFromPhysicalSlot

public static SingleLogicalSlot allocateFromPhysicalSlot(SlotRequestId slotRequestId,
                                                         PhysicalSlot physicalSlot,
                                                         Locality locality,
                                                         SlotOwner slotOwner,
                                                         boolean slotWillBeOccupiedIndefinitely)

release

public void release(Throwable cause)

A release of the payload by the AllocatedSlot triggers a release of the payload of the logical slot.

Specified by:

release in interface PhysicalSlot.Payload

Parameters:

cause - of the payload release

willOccupySlotIndefinitely

public boolean willOccupySlotIndefinitely()

Description copied from interface: PhysicalSlot.Payload

Returns whether the payload will occupy a physical slot indefinitely.

Specified by:

willOccupySlotIndefinitely in interface PhysicalSlot.Payload

Returns:

true if the payload will occupy a physical slot indefinitely, otherwise false