org.neo4j.causalclustering.core.state.machines.token

Class ReplicatedTokenStateMachine<TOKEN extends org.neo4j.storageengine.api.Token>

java.lang.Object

org.neo4j.causalclustering.core.state.machines.token.ReplicatedTokenStateMachine<TOKEN>

All Implemented Interfaces:

StateMachine<ReplicatedTokenRequest>

public class ReplicatedTokenStateMachine<TOKEN extends org.neo4j.storageengine.api.Token>
extends Object
implements StateMachine<ReplicatedTokenRequest>

Constructor Summary

Constructors

Constructor and Description
ReplicatedTokenStateMachine(TokenRegistry<TOKEN> tokenRegistry, org.neo4j.storageengine.api.TokenFactory<TOKEN> tokenFactory, org.neo4j.logging.LogProvider logProvider)

Method Summary

Modifier and Type	Method and Description
void	applyCommand(ReplicatedTokenRequest tokenRequest, long commandIndex, Consumer<Result> callback) Apply command to state machine, modifying its internal state.
void	flush() Flushes state to durable storage.
void	installCommitProcess(org.neo4j.kernel.impl.api.TransactionCommitProcess commitProcess, long lastCommittedIndex)
long	lastAppliedIndex() Return the index of the last applied command by this state machine.

Methods inherited from class java.lang.Object

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

Constructor Detail

ReplicatedTokenStateMachine

public ReplicatedTokenStateMachine(TokenRegistry<TOKEN> tokenRegistry,
                                   org.neo4j.storageengine.api.TokenFactory<TOKEN> tokenFactory,
                                   org.neo4j.logging.LogProvider logProvider)

Method Detail

installCommitProcess

public void installCommitProcess(org.neo4j.kernel.impl.api.TransactionCommitProcess commitProcess,
                                 long lastCommittedIndex)

applyCommand

public void applyCommand(ReplicatedTokenRequest tokenRequest,
                         long commandIndex,
                         Consumer<Result> callback)

Description copied from interface: StateMachine

Apply command to state machine, modifying its internal state. Implementations should be idempotent, so that the caller is free to replay commands from any point in the log.

Specified by:

applyCommand in interface StateMachine<ReplicatedTokenRequest>

Parameters:

tokenRequest - Command to the state machine.

commandIndex - The index of the command.

callback - To be called when a result is produced.

flush

public void flush()
           throws IOException

Description copied from interface: StateMachine

Flushes state to durable storage.

Specified by:

flush in interface StateMachine<ReplicatedTokenRequest>

Throws:

IOException

lastAppliedIndex

public long lastAppliedIndex()

Description copied from interface: StateMachine

Return the index of the last applied command by this state machine.

Specified by:

lastAppliedIndex in interface StateMachine<ReplicatedTokenRequest>

Returns:

the last applied index for this state machine