raft cluster

wip: raft does not care about migrating

wip: optimize code

wip: raft election

wip

wip: fix raft leader missing log entries

wip

fix a dead lock

batch set slot route

wip: raft persist

wip

refactor cluster suite

remove relay

rename relay2

refactor: allow customizing client factory

test raft

refactor re-balance

avoid errors caused by inconsistent status on follower nodes during raft commits

test raft election

cluster/pubsub.go

@@ -7,19 +7,13 @@ import (
 )
 
 const (
-	relayPublish = "_publish"
-	publish      = "publish"
-)
-
-var (
-	publishRelayCmd = []byte(relayPublish)
-	publishCmd      = []byte(publish)
+	relayPublish = "publish_"
 )
 
 // Publish broadcasts msg to all peers in cluster when receive publish command from client
-func Publish(cluster *Cluster, c redis.Connection, args [][]byte) redis.Reply {
+func Publish(cluster *Cluster, c redis.Connection, cmdLine [][]byte) redis.Reply {
 	var count int64 = 0
-	results := cluster.broadcast(c, args)
+	results := cluster.broadcast(c, modifyCmd(cmdLine, relayPublish))
 	for _, val := range results {
 		if errReply, ok := val.(protocol.ErrorReply); ok {
 			logger.Error("publish occurs error: " + errReply.Error())
@@ -30,12 +24,6 @@ func Publish(cluster *Cluster, c redis.Connection, args [][]byte) redis.Reply {
 	return protocol.MakeIntReply(count)
 }
 
-// onRelayedPublish receives publish command from peer, just publish to local subscribing clients, do not relay to peers
-func onRelayedPublish(cluster *Cluster, c redis.Connection, args [][]byte) redis.Reply {
-	args[0] = publishCmd
-	return cluster.db.Exec(c, args) // let local db.hub handle publish
-}
-
 // Subscribe puts the given connection into the given channel
 func Subscribe(cluster *Cluster, c redis.Connection, args [][]byte) redis.Reply {
 	return cluster.db.Exec(c, args) // let local db.hub handle subscribe