func forwardMsgToPool(msg protocol.Message, clusterConnPool connection.Pool, isMaster bool, isAsking bool) (msgAck protocol.Message) {
var (
clusterConn connection.Conn
err error
)
if clusterConn, err = clusterConnPool.Get(); err != nil {
logger.Warningf("从连接池中获取句柄出错: %v", err)
return protocol.ERR_ClusterSlotsConn
}
if isMaster {
if err = clusterConn.Readwrite(); err != nil {
goto failure
}
} else {
if err = clusterConn.Readonly(); err != nil {
goto failure
}
}
if isAsking {
if err = clusterConn.Asking(); err != nil {
goto failure
}
}
if msgAck, err = clusterConn.HandelMessage(msg); err != nil {
goto failure
}
clusterConnPool.Put(clusterConn)
return
failure:
clusterConnPool.Remove(clusterConn)
logger.Warningf("转发消息出错: %v", err)
return protocol.ERR_ClusterSlotsForward
}
func MGetCommand(cmd command.Command, msg protocol.Message) (msgAck protocol.Message) {
var (
elements []protocol.Message = msg.GetArraysValue()
element protocol.Message
hashSlot uint16
classification map[uint16]protocol.Message = make(map[uint16]protocol.Message)
msgSpice protocol.Message
ok bool
)
for _, element = range elements[1:] {
hashSlot = crc16.HashSlot(element.GetBytesValue())
if msgSpice, ok = classification[hashSlot]; !ok {
msgSpice = protocol.NewMessage().AppendArraysValue(elements[0])
}
classification[hashSlot] = msgSpice.AppendArraysValue(element)
}
// 按slot分命令
var (
node nodes.Nodes
msgAckSplit protocol.Message
msgAckMap map[protocol.Message]protocol.Message = make(map[protocol.Message]protocol.Message)
msgKey int
msgValue protocol.Message
)
for hashSlot, msgSpice = range classification {
if node, ok = cluster.GetClusterParameter().GetSlot(hashSlot); !ok {
logger.Warningf("获取不到slot节点: %d", hashSlot)
continue
}
msgAckSplit = forwardMsg(msgSpice, node, cmd.CheckReadonly())
if msgAckSplit.GetProtocolType() != protocol.ArraysType {
logger.Warningf("命令结果预期不符: %v", msgSpice)
continue
}
if msgSpice.GetIntegersValue()-1 != msgAckSplit.GetIntegersValue() {
logger.Warningf("命令结果预期不符: %v", msgSpice)
continue
}
for msgKey, msgValue = range msgSpice.GetArraysValue()[1:] {
msgAckMap[msgValue] = msgAckSplit.GetArraysValue()[msgKey]
}
}
// 整合结果
msgAck = protocol.NewMessage()
for _, element = range elements[1:] {
if msgValue, ok = msgAckMap[element]; ok {
msgAck.AppendArraysValue(msgAckMap[element])
} else {
msgAck.AppendArraysValue(protocol.NullBulkString)
}
}
return
}
func DelCommand(cmd command.Command, msg protocol.Message) (msgAck protocol.Message) {
var (
elements []protocol.Message = msg.GetArraysValue()
element protocol.Message
hashSlot uint16
classification map[uint16]protocol.Message = make(map[uint16]protocol.Message)
msgSpice protocol.Message
ok bool
)
for _, element = range elements[1:] {
hashSlot = crc16.HashSlot(element.GetBytesValue())
if msgSpice, ok = classification[hashSlot]; !ok {
msgSpice = protocol.NewMessage().AppendArraysValue(elements[0])
}
classification[hashSlot] = msgSpice.AppendArraysValue(element)
}
// 按slot分命令
var (
node nodes.Nodes
msgAckSplit protocol.Message
)
msgAck = protocol.NewMessage()
for hashSlot, msgSpice = range classification {
if node, ok = cluster.GetClusterParameter().GetSlot(hashSlot); !ok {
logger.Warningf("获取不到slot节点: %d", hashSlot)
continue
}
msgAckSplit = forwardMsg(msgSpice, node, cmd.CheckReadonly())
msgAck.AppendIntegersValue(msgAckSplit)
}
return
}
func MSetCommand(cmd command.Command, msg protocol.Message) (msgAck protocol.Message) {
var elements []protocol.Message = msg.GetArraysValue()
if msg.GetIntegersValue()%2 != 1 {
return protocol.NewMessageString(protocol.ERR_wrong_number_command, cmd.Name())
}
var (
keyIndex int64
hashSlot uint16
classification map[uint16]protocol.Message = make(map[uint16]protocol.Message)
msgSpice protocol.Message
ok bool
)
for keyIndex = 1; keyIndex < msg.GetIntegersValue(); keyIndex += 2 {
hashSlot = crc16.HashSlot(elements[keyIndex].GetBytesValue())
if msgSpice, ok = classification[hashSlot]; !ok {
msgSpice = protocol.NewMessage().AppendArraysValue(elements[0])
}
classification[hashSlot] = msgSpice.AppendArraysValue(elements[keyIndex]).AppendArraysValue(elements[keyIndex+1])
}
// 按slot分命令
var node nodes.Nodes
for hashSlot, msgSpice = range classification {
if node, ok = cluster.GetClusterParameter().GetSlot(hashSlot); !ok {
logger.Warningf("获取不到slot节点: %d", hashSlot)
continue
}
forwardMsg(msgSpice, node, cmd.CheckReadonly())
}
return protocol.OK
}
func ProcKeyCommand(cmd command.Command, msg protocol.Message) (msgAck protocol.Message) {
var (
slot uint16 = crc16.HashSlot(msg.GetArraysValue()[1].GetBytesValue()) // 第一个参数是Key
node nodes.Nodes
ok bool
)
if node, ok = cluster.GetClusterParameter().GetSlot(slot); !ok {
logger.Warningf("获取不到slot节点: %d", slot)
return protocol.ERR_ClusterSlots
}
return forwardMsg(msg, node, cmd.CheckReadonly())
}