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

redis/protocol/consts.go

@@ -1,5 +1,10 @@
 package protocol
 
+import (
+	"bytes"
+	"github.com/hdt3213/godis/interface/redis"
+)
+
 // PongReply is +PONG
 type PongReply struct{}
 
@@ -57,6 +62,10 @@ func MakeEmptyMultiBulkReply() *EmptyMultiBulkReply {
 	return &EmptyMultiBulkReply{}
 }
 
+func IsEmptyMultiBulkReply(reply redis.Reply) bool {
+	return bytes.Equal(reply.ToBytes(), emptyMultiBulkBytes)
+}
+
 // NoReply respond nothing, for commands like subscribe
 type NoReply struct{}