com.hazelcast.cp.internal.raft.impl.state

Class LeaderState

java.lang.Object

com.hazelcast.cp.internal.raft.impl.state.LeaderState

public class LeaderState
extends Object

Mutable state maintained by the leader of the Raft group. Leader keeps two indices for each server:

• nextIndex: index of the next log entry to send to that server (initialized to leader's lastLogIndex + 1)
• matchIndex: index of highest log entry known to be replicated on server (initialized to 0, increases monotonically)

Method Summary

Modifier and Type	Method and Description
void	add(Endpoint follower, long lastLogIndex) Add a new follower with the leader's lastLogIndex.
long	getMatchIndex(Endpoint follower) Returns the matchIndex for a known follower.
long	getNextIndex(Endpoint follower) Returns the nextIndex for a known follower.
Collection<Long>	matchIndices()
void	remove(Endpoint follower) Removes a follower from leader maintained state.
void	setMatchIndex(Endpoint follower, long index) Sets matchIndex for a known follower.
void	setNextIndex(Endpoint follower, long index) Sets nextIndex for a known follower.

Methods inherited from class java.lang.Object

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

Method Detail

add

public void add(Endpoint follower,
                long lastLogIndex)

Add a new follower with the leader's lastLogIndex. Follower's nextIndex will be set to lastLogIndex + 1 and matchIndex to 0.

remove

public void remove(Endpoint follower)

Removes a follower from leader maintained state.

setNextIndex

public void setNextIndex(Endpoint follower,
                         long index)

Sets nextIndex for a known follower.

setMatchIndex

public void setMatchIndex(Endpoint follower,
                          long index)

Sets matchIndex for a known follower.

matchIndices

public Collection<Long> matchIndices()

getNextIndex

public long getNextIndex(Endpoint follower)

Returns the nextIndex for a known follower.

getMatchIndex

public long getMatchIndex(Endpoint follower)

Returns the matchIndex for a known follower.