Package org.opendaylight.controller.cluster.raft

Class NoopRaftActorSnapshotCohort

java.lang.Object

org.opendaylight.controller.cluster.raft.NoopRaftActorSnapshotCohort

All Implemented Interfaces:

RaftActorSnapshotCohort

public final class NoopRaftActorSnapshotCohort
extends Object
implements RaftActorSnapshotCohort

RaftActorSnapshotCohort implementation that does nothing.

Author:

Thomas Pantelis

Field Summary

Fields

Modifier and Type	Field	Description
static final NoopRaftActorSnapshotCohort	INSTANCE

Method Summary

Modifier and Type	Method	Description
void	applySnapshot(Snapshot.State snapshotState)	This method is called to apply a snapshot installed by the leader.
void	createSnapshot(ActorRef actorRef, Optional<OutputStream> installSnapshotStream)	This method is called by the RaftActor when a snapshot needs to be created.
Snapshot.State	deserializeSnapshot(ByteSource snapshotBytes)	This method is called to de-serialize snapshot data that was previously serialized via RaftActorSnapshotCohort.createSnapshot(akka.actor.ActorRef, java.util.Optional<java.io.OutputStream>) to a State instance.

Methods inherited from class java.lang.Object

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

Field Details

INSTANCE

public static final NoopRaftActorSnapshotCohort INSTANCE

Method Details

createSnapshot

public void createSnapshot(ActorRef actorRef,
 Optional<OutputStream> installSnapshotStream)

Description copied from interface: RaftActorSnapshotCohort

This method is called by the RaftActor when a snapshot needs to be created. The implementation should send a CaptureSnapshotReply to the given actor.

Specified by:

createSnapshot in interface RaftActorSnapshotCohort

Parameters:

actorRef - the actor to which to respond

installSnapshotStream - Optional OutputStream that is present if the snapshot is to also be installed on a follower. The implementation must serialize its state to the OutputStream and return the installSnapshotStream instance in the CaptureSnapshotReply along with the snapshot State instance. The snapshot State is serialized directly to the snapshot store while the OutputStream is used to send the state data to follower(s) in chunks. The RaftActorSnapshotCohort.deserializeSnapshot(com.google.common.io.ByteSource) method is used to convert the serialized data back to a State instance on the follower end. The serialization for snapshot install is passed off so the cost of serialization is not charged to the raft actor's thread.

applySnapshot

public void applySnapshot(Snapshot.State snapshotState)

Description copied from interface: RaftActorSnapshotCohort

This method is called to apply a snapshot installed by the leader.

Specified by:

applySnapshot in interface RaftActorSnapshotCohort

Parameters:

snapshotState - a snapshot of the state of the actor

deserializeSnapshot

public Snapshot.State deserializeSnapshot(ByteSource snapshotBytes)

Description copied from interface: RaftActorSnapshotCohort

This method is called to de-serialize snapshot data that was previously serialized via RaftActorSnapshotCohort.createSnapshot(akka.actor.ActorRef, java.util.Optional<java.io.OutputStream>) to a State instance.

Specified by:

deserializeSnapshot in interface RaftActorSnapshotCohort

Parameters:

snapshotBytes - the ByteSource containing the serialized data

Returns:

the converted snapshot State