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 ProcessCommand(msg protocol.Message) protocol.Message {
var (
name []byte
argc int64
cmd command.Command
ok bool
)
switch msg.GetProtocolType() {
case protocol.ArraysType:
if argc = msg.GetIntegersValue(); argc > 0 {
name = msg.GetArraysValue()[0].GetBytesValue()
}
}
if cmd, ok = commandSet.SearchCommand(name); !ok {
return protocol.NewMessageString(protocol.ERR_unknown_command, name)
}
if !cmd.CheckArgc(argc) {
return protocol.NewMessageString(protocol.ERR_wrong_number_command, cmd.Name())
}
if cmd.CheckForbidden() {
return protocol.NewMessageString(protocol.ERR_forbidden_command, cmd.Name())
}
return cmd.Proc(cmd, msg)
}
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 PingCommand(cmd command.Command, msg protocol.Message) protocol.Message {
if msg.GetIntegersValue() > 2 {
return protocol.NewMessageString(protocol.ERR_wrong_number_command, cmd.Name())
}
if msg.GetIntegersValue() == 2 {
return msg.GetArraysValue()[1]
}
return protocol.PONG
}
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())
}
func (c *cluster) refresh(server string) (err error) {
var (
connPool connection.Pool = c.GetNodePool(server)
conn connection.Conn
slotsMsgAck protocol.Message
)
if conn, err = connPool.Get(); err != nil {
return
}
// 发送cluster slots
if slotsMsgAck, err = conn.HandelMessage(protocol.ClusterSlots); err != nil {
connPool.Remove(conn)
return
}
connPool.Put(conn)
// 处理返回值
if slotsMsgAck.GetProtocolType() != protocol.ArraysType || slotsMsgAck.GetIntegersValue() <= 0 {
return fmt.Errorf("slots数据无效")
}
var slotsMsgAckValue protocol.Message
for _, slotsMsgAckValue = range slotsMsgAck.GetArraysValue() {
if slotsMsgAckValue.GetProtocolType() != protocol.ArraysType || slotsMsgAckValue.GetIntegersValue() < 3 {
return fmt.Errorf("slots节点数据无效")
}
var (
slotsMsgAckValueArrays []protocol.Message = slotsMsgAckValue.GetArraysValue()
nodeMsgValue protocol.Message
nodeMsgValueArrays []protocol.Message
connPoolList []connection.Pool
)
if slotsMsgAckValueArrays[0].GetProtocolType() != protocol.IntegersType || slotsMsgAckValueArrays[1].GetProtocolType() != protocol.IntegersType {
return fmt.Errorf("slots节点起始或者结束数据无效")
}
for _, nodeMsgValue = range slotsMsgAckValueArrays[2:] {
if nodeMsgValue.GetProtocolType() != protocol.ArraysType || nodeMsgValue.GetIntegersValue() < 2 {
return fmt.Errorf("slot节点数据无效")
}
nodeMsgValueArrays = nodeMsgValue.GetArraysValue()
if nodeMsgValueArrays[0].GetProtocolType() != protocol.BulkStringsType {
return fmt.Errorf("slot节点IP无效")
}
if nodeMsgValueArrays[1].GetProtocolType() != protocol.IntegersType {
return fmt.Errorf("slot节点PORT无效")
}
connPoolList = append(
connPoolList,
c.GetNodePool(fmt.Sprintf("%s:%d", nodeMsgValueArrays[0].GetBytesValue(), nodeMsgValueArrays[1].GetIntegersValue())),
)
}
c.clusterSlots.AddSlots(
slotsMsgAckValueArrays[0].GetIntegersValue(),
slotsMsgAckValueArrays[1].GetIntegersValue(),
nodes.NewNodes().Set(connPoolList), // TODO 同一个List用同一个Nodes
)
}
return
}
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 EchoCommand(cmd command.Command, msg protocol.Message) protocol.Message {
return msg.GetArraysValue()[1]
}