Package io.atomix.raft.protocol

Class PollRequest

java.lang.Object

io.atomix.raft.protocol.AbstractRaftRequest

io.atomix.raft.protocol.PollRequest

All Implemented Interfaces:

RaftMessage, RaftRequest

public class PollRequest
extends AbstractRaftRequest

Server poll request.

Poll requests aid in the implementation of the so-called "pre-vote" protocol. They are sent by followers to all other servers prior to transitioning to the candidate state. This helps ensure that servers that can't win elections do not disrupt existing leaders when e.g. rejoining the cluster after a partition.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	PollRequest.Builder	Poll request builder.

Constructor Summary

Constructors

Constructor	Description
PollRequest(long term, String candidate, long lastLogIndex, long lastLogTerm)

Method Summary

Modifier and Type	Method	Description
static PollRequest.Builder	builder()	Returns a new poll request builder.
MemberId	candidate()	Returns the candidate's address.
boolean	equals(Object o)
MemberId	from()
int	hashCode()
long	lastLogIndex()	Returns the candidate's last log index.
long	lastLogTerm()	Returns the candidate's last log term.
long	term()	Returns the requesting node's current term.
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Details

PollRequest

public PollRequest(long term,
 String candidate,
 long lastLogIndex,
 long lastLogTerm)

Method Details

builder

public static PollRequest.Builder builder()

Returns a new poll request builder.

Returns:

A new poll request builder.

term

public long term()

Returns the requesting node's current term.

Returns:

The requesting node's current term.

candidate

public MemberId candidate()

Returns the candidate's address.

Returns:

The candidate's address.

lastLogIndex

public long lastLogIndex()

Returns the candidate's last log index.

Returns:

The candidate's last log index.

lastLogTerm

public long lastLogTerm()

Returns the candidate's last log term.

Returns:

The candidate's last log term.

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object o)

Overrides:

equals in class Object

toString

public String toString()

Overrides:

toString in class Object

from

public MemberId from()