tech.ydb.coordination.impl

Class CoordinationSessionImpl

java.lang.Object

tech.ydb.coordination.impl.CoordinationSessionImpl

All Implemented Interfaces:

CoordinationSession

public class CoordinationSessionImpl
extends Object
implements CoordinationSession

Author:

Kirill Kurdyukov

Nested Class Summary

Nested classes/interfaces inherited from interface tech.ydb.coordination.CoordinationSession

CoordinationSession.Observer

Constructor Summary

Constructors

Constructor and Description
CoordinationSessionImpl(GrpcReadWriteStream<tech.ydb.proto.coordination.SessionResponse,tech.ydb.proto.coordination.SessionRequest> coordinationStream)

Method Summary

Modifier and Type	Method and Description
long	getSessionId()
void	sendAcquireSemaphore(tech.ydb.proto.coordination.SessionRequest.AcquireSemaphore acquireSemaphore) Used to acquire a semaphore
void	sendCreateSemaphore(tech.ydb.proto.coordination.SessionRequest.CreateSemaphore createSemaphore) Used to create a new semaphore
void	sendDeleteSemaphore(tech.ydb.proto.coordination.SessionRequest.DeleteSemaphore deleteSemaphore) Used to delete an existing semaphore
void	sendDescribeSemaphore(tech.ydb.proto.coordination.SessionRequest.DescribeSemaphore describeSemaphore) Used to describe semaphores and watch them for changes
void	sendPingPong(tech.ydb.proto.coordination.SessionRequest.PingPong pingPong) Used for checking liveness of the connection
void	sendReleaseSemaphore(tech.ydb.proto.coordination.SessionRequest.ReleaseSemaphore releaseSemaphore) Used to release a semaphore
void	sendStartSession(tech.ydb.proto.coordination.SessionRequest.SessionStart sessionStart) First message used to start/restore a session
void	sendUpdateSemaphore(tech.ydb.proto.coordination.SessionRequest.UpdateSemaphore updateSemaphore) Used to change semaphore data
CompletableFuture<Status>	start(CoordinationSession.Observer observer)
void	stop()

Methods inherited from class java.lang.Object

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

Constructor Detail

CoordinationSessionImpl

public CoordinationSessionImpl(GrpcReadWriteStream<tech.ydb.proto.coordination.SessionResponse,tech.ydb.proto.coordination.SessionRequest> coordinationStream)

Method Detail

getSessionId

public long getSessionId()

Specified by:

getSessionId in interface CoordinationSession

start

public CompletableFuture<Status> start(CoordinationSession.Observer observer)

Specified by:

start in interface CoordinationSession

sendStartSession

public void sendStartSession(tech.ydb.proto.coordination.SessionRequest.SessionStart sessionStart)

Description copied from interface: CoordinationSession

First message used to start/restore a session

Specified by:

sendStartSession in interface CoordinationSession

Parameters:

sessionStart - session start of proto body

sendPingPong

public void sendPingPong(tech.ydb.proto.coordination.SessionRequest.PingPong pingPong)

Description copied from interface: CoordinationSession

Used for checking liveness of the connection

Specified by:

sendPingPong in interface CoordinationSession

Parameters:

pingPong - ping pong of proto body

sendAcquireSemaphore

public void sendAcquireSemaphore(tech.ydb.proto.coordination.SessionRequest.AcquireSemaphore acquireSemaphore)

Description copied from interface: CoordinationSession

Used to acquire a semaphore

WARNING: a single session cannot acquire the same semaphore multiple times

Later requests override previous operations with the same semaphore, e.g. to reduce acquired count, change timeout or attached data.

Specified by:

sendAcquireSemaphore in interface CoordinationSession

Parameters:

acquireSemaphore - acquire semaphore of proto body

sendReleaseSemaphore

public void sendReleaseSemaphore(tech.ydb.proto.coordination.SessionRequest.ReleaseSemaphore releaseSemaphore)

Description copied from interface: CoordinationSession

Used to release a semaphore

WARNING: a single session cannot release the same semaphore multiple times

The release operation will either remove current session from waiters queue or release an already owned semaphore.

Specified by:

sendReleaseSemaphore in interface CoordinationSession

Parameters:

releaseSemaphore - release semaphore of proto body

sendDescribeSemaphore

public void sendDescribeSemaphore(tech.ydb.proto.coordination.SessionRequest.DescribeSemaphore describeSemaphore)

Description copied from interface: CoordinationSession

Used to describe semaphores and watch them for changes

WARNING: a describe operation will cancel previous watches on the same semaphore

Specified by:

sendDescribeSemaphore in interface CoordinationSession

Parameters:

describeSemaphore - describe semaphore of proto body

sendCreateSemaphore

public void sendCreateSemaphore(tech.ydb.proto.coordination.SessionRequest.CreateSemaphore createSemaphore)

Description copied from interface: CoordinationSession

Used to create a new semaphore

Specified by:

sendCreateSemaphore in interface CoordinationSession

Parameters:

createSemaphore - create semaphore of proto body

sendUpdateSemaphore

public void sendUpdateSemaphore(tech.ydb.proto.coordination.SessionRequest.UpdateSemaphore updateSemaphore)

Description copied from interface: CoordinationSession

Used to change semaphore data

Specified by:

sendUpdateSemaphore in interface CoordinationSession

Parameters:

updateSemaphore - update semaphore of proto body

sendDeleteSemaphore

public void sendDeleteSemaphore(tech.ydb.proto.coordination.SessionRequest.DeleteSemaphore deleteSemaphore)

Description copied from interface: CoordinationSession

Used to delete an existing semaphore

Specified by:

sendDeleteSemaphore in interface CoordinationSession

Parameters:

deleteSemaphore - delete semaphore of proto body

stop

public void stop()

Specified by:

stop in interface CoordinationSession