org.apache.ratis.server.impl

Class LogAppender

java.lang.Object

org.apache.ratis.server.impl.LogAppender

public class LogAppender
extends Object

A daemon thread appending log entries to a follower peer.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected class	LogAppender.SnapshotRequestIter

Field Summary

Fields

Modifier and Type	Field and Description
static org.slf4j.Logger	LOG

Constructor Summary

Constructors

Constructor and Description
LogAppender(RaftServerImpl server, LeaderState leaderState, FollowerInfo f)

Method Summary

Modifier and Type	Method and Description
protected boolean	checkResponseTerm(long responseTerm)
protected void	checkSlowness()
protected org.apache.ratis.proto.RaftProtos.InstallSnapshotRequestProto	createInstallSnapshotNotificationRequest(TermIndex firstLogStartTermIndex)
protected org.apache.ratis.proto.RaftProtos.AppendEntriesRequestProto	createRequest(long callId)
FollowerInfo	getFollower()
protected RaftPeerId	getFollowerId()
long	getHalfMinTimeoutMs()
protected long	getHeartbeatRemainingTime()
RaftLog	getRaftLog()
RaftServerImpl	getServer()
boolean	isAppenderRunning()
void	notifyAppend()
protected void	runAppenderImpl() Check and send appendEntries RPC
protected boolean	shouldHeartbeat()
protected SnapshotInfo	shouldInstallSnapshot()
protected boolean	shouldSendRequest() Should the leader send appendEntries RPC to this follower?
void	stopAppender()
protected void	submitEventOnSuccessAppend()
String	toString()
protected void	updateCommitIndex(long commitIndex)

Methods inherited from class java.lang.Object

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

Field Detail

LOG

public static final org.slf4j.Logger LOG

Constructor Detail

LogAppender

public LogAppender(RaftServerImpl server,
                   LeaderState leaderState,
                   FollowerInfo f)

Method Detail

getServer

public RaftServerImpl getServer()

getRaftLog

public RaftLog getRaftLog()

getHalfMinTimeoutMs

public long getHalfMinTimeoutMs()

toString

public String toString()

Overrides:

toString in class Object

isAppenderRunning

public boolean isAppenderRunning()

stopAppender

public void stopAppender()

getFollower

public FollowerInfo getFollower()

getFollowerId

protected RaftPeerId getFollowerId()

createRequest

protected org.apache.ratis.proto.RaftProtos.AppendEntriesRequestProto createRequest(long callId)
                                                                             throws RaftLogIOException

Throws:

RaftLogIOException

updateCommitIndex

protected void updateCommitIndex(long commitIndex)

createInstallSnapshotNotificationRequest

protected org.apache.ratis.proto.RaftProtos.InstallSnapshotRequestProto createInstallSnapshotNotificationRequest(TermIndex firstLogStartTermIndex)

shouldInstallSnapshot

protected SnapshotInfo shouldInstallSnapshot()

runAppenderImpl

protected void runAppenderImpl()
                        throws InterruptedException,
                               IOException

Check and send appendEntries RPC

Throws:

InterruptedException

IOException

submitEventOnSuccessAppend

protected void submitEventOnSuccessAppend()

checkSlowness

protected void checkSlowness()

notifyAppend

public void notifyAppend()

shouldSendRequest

protected boolean shouldSendRequest()

Should the leader send appendEntries RPC to this follower?

shouldHeartbeat

protected boolean shouldHeartbeat()

getHeartbeatRemainingTime

protected long getHeartbeatRemainingTime()

Returns:

the time in milliseconds that the leader should send a heartbeat.

checkResponseTerm

protected boolean checkResponseTerm(long responseTerm)