mirror of
https://github.com/HDT3213/godis.git
synced 2025-10-04 16:32:41 +08:00
135 lines
3.2 KiB
Go
135 lines
3.2 KiB
Go
package cluster
|
|
|
|
import (
|
|
"context"
|
|
"fmt"
|
|
"github.com/hdt3213/godis/cluster/idgenerator"
|
|
"github.com/hdt3213/godis/config"
|
|
"github.com/hdt3213/godis/datastruct/dict"
|
|
"github.com/hdt3213/godis/db"
|
|
"github.com/hdt3213/godis/interface/redis"
|
|
"github.com/hdt3213/godis/lib/consistenthash"
|
|
"github.com/hdt3213/godis/lib/logger"
|
|
"github.com/hdt3213/godis/redis/reply"
|
|
"github.com/jolestar/go-commons-pool/v2"
|
|
"runtime/debug"
|
|
"strings"
|
|
)
|
|
|
|
type Cluster struct {
|
|
self string
|
|
|
|
peers []string
|
|
peerPicker *consistenthash.Map
|
|
peerConnection map[string]*pool.ObjectPool
|
|
|
|
db *db.DB
|
|
transactions *dict.SimpleDict // id -> Transaction
|
|
|
|
idGenerator *idgenerator.IdGenerator
|
|
}
|
|
|
|
const (
|
|
replicas = 4
|
|
lockSize = 64
|
|
)
|
|
|
|
// start current processing as a node of cluster
|
|
func MakeCluster() *Cluster {
|
|
cluster := &Cluster{
|
|
self: config.Properties.Self,
|
|
|
|
db: db.MakeDB(),
|
|
transactions: dict.MakeSimple(),
|
|
peerPicker: consistenthash.New(replicas, nil),
|
|
peerConnection: make(map[string]*pool.ObjectPool),
|
|
|
|
idGenerator: idgenerator.MakeGenerator("godis", config.Properties.Self),
|
|
}
|
|
contains := make(map[string]struct{})
|
|
nodes := make([]string, 0, len(config.Properties.Peers)+1)
|
|
for _, peer := range config.Properties.Peers {
|
|
if _, ok := contains[peer]; ok {
|
|
continue
|
|
}
|
|
contains[peer] = struct{}{}
|
|
nodes = append(nodes, peer)
|
|
}
|
|
nodes = append(nodes, config.Properties.Self)
|
|
cluster.peerPicker.Add(nodes...)
|
|
ctx := context.Background()
|
|
for _, peer := range nodes {
|
|
cluster.peerConnection[peer] = pool.NewObjectPoolWithDefaultConfig(ctx, &ConnectionFactory{
|
|
Peer: peer,
|
|
})
|
|
}
|
|
cluster.peers = nodes
|
|
return cluster
|
|
}
|
|
|
|
// args contains all
|
|
type CmdFunc func(cluster *Cluster, c redis.Connection, args [][]byte) redis.Reply
|
|
|
|
func (cluster *Cluster) Close() {
|
|
cluster.db.Close()
|
|
}
|
|
|
|
var router = MakeRouter()
|
|
|
|
func (cluster *Cluster) Exec(c redis.Connection, args [][]byte) (result redis.Reply) {
|
|
defer func() {
|
|
if err := recover(); err != nil {
|
|
logger.Warn(fmt.Sprintf("error occurs: %v\n%s", err, string(debug.Stack())))
|
|
result = &reply.UnknownErrReply{}
|
|
}
|
|
}()
|
|
|
|
cmd := strings.ToLower(string(args[0]))
|
|
cmdFunc, ok := router[cmd]
|
|
if !ok {
|
|
return reply.MakeErrReply("ERR unknown command '" + cmd + "', or not supported in cluster mode")
|
|
}
|
|
result = cmdFunc(cluster, c, args)
|
|
return
|
|
}
|
|
|
|
func (cluster *Cluster) AfterClientClose(c redis.Connection) {
|
|
|
|
}
|
|
|
|
func Ping(cluster *Cluster, c redis.Connection, args [][]byte) redis.Reply {
|
|
if len(args) == 1 {
|
|
return &reply.PongReply{}
|
|
} else if len(args) == 2 {
|
|
return reply.MakeStatusReply("\"" + string(args[1]) + "\"")
|
|
} else {
|
|
return reply.MakeErrReply("ERR wrong number of arguments for 'ping' command")
|
|
}
|
|
}
|
|
|
|
/*----- utils -------*/
|
|
|
|
func makeArgs(cmd string, args ...string) [][]byte {
|
|
result := make([][]byte, len(args)+1)
|
|
result[0] = []byte(cmd)
|
|
for i, arg := range args {
|
|
result[i+1] = []byte(arg)
|
|
}
|
|
return result
|
|
}
|
|
|
|
// return peer -> keys
|
|
func (cluster *Cluster) groupBy(keys []string) map[string][]string {
|
|
result := make(map[string][]string)
|
|
for _, key := range keys {
|
|
peer := cluster.peerPicker.Get(key)
|
|
group, ok := result[peer]
|
|
if !ok {
|
|
group = make([]string, 0)
|
|
}
|
|
group = append(group, key)
|
|
result[peer] = group
|
|
}
|
|
return result
|
|
}
|