func (s *Session) DEL(req *redis.Request) {
var result int64
// 串行会很慢，可以考滤开goroutine并行执行
// 但是这个goroutine量一定要控制，不能有多少key就多少goroutine
p := make(chan int, s.MulOpParallel)
for i := 0; i < s.MulOpParallel; i++ {
p <- 1
}
defer func() {
close(p)
}()
keys := req.Args()
wg := sync.WaitGroup{}
wg.Add(len(keys))
for _, key := range keys {
go func(key string) {
<-p
// log.Info("In DEL goroutine ", key)
cmdslice := []string{"DEL", key}
r := redis.NewRequest(cmdslice)
resp := s.Proxy.Backend.OnDEL(r)
result += resp.Val()
p <- 1
wg.Done()
}(key)
}
wg.Wait()
mergeResp := redis.FormatInt(result)
// log.Info("DEL merger resp ", mergeResp, result)
s.write2client(mergeResp)
}
func (s *Session) MSET(req *redis.Request) {
pair := req.Args()
if len(pair)%2 != 0 {
err := fmt.Sprintf("-%s\r\n", WrongArgumentCount)
s.write2client([]byte(err))
return
}
p := make(chan int, s.MulOpParallel)
for i := 0; i < s.MulOpParallel; i++ {
p <- 1
}
defer func() {
close(p)
}()
wg := sync.WaitGroup{}
wg.Add(len(pair) / 2)
partialErr := 0
// we just ignore return code, MSET reuturn OK unless anyone set error
for i := 0; i < len(pair); i += 2 {
go func(k string, v string) {
<-p
// log.Info("In MSET goroutine ", k, v)
cmdslice := []string{"SET", k, v}
r := redis.NewRequest(cmdslice)
resp := s.Proxy.Backend.OnSET(r)
if resp.Err() != nil && resp.Err() != redis.Nil {
// log.Warning("MSET error ", cmdslice, resp.Err())
partialErr += 1
}
p <- 1
wg.Done()
}(pair[i], pair[i+1])
}
wg.Wait()
if partialErr == 0 {
s.write2client(OK_BYTES)
} else {
d := fmt.Sprintf("- %d MSET failed, partial key/value %d set\r\n", partialErr, len(pair)/2-partialErr)
s.write2client([]byte(d))
}
}
func (s *Session) MGET(req *redis.Request) {
p := make(chan int, s.MulOpParallel)
for i := 0; i < s.MulOpParallel; i++ {
p <- 1
}
defer func() {
close(p)
}()
keys := req.Args()
wg := sync.WaitGroup{}
wg.Add(len(keys))
// we should ensure the KEY's order
result := make([][]byte, len(keys))
for idx, key := range keys {
go func(key string, idx int) {
<-p
// log.Info("In MGET goroutine ", key)
cmdslice := []string{"GET", key}
r := redis.NewRequest(cmdslice)
resp := s.Proxy.Backend.OnGET(r)
result[idx] = resp.Reply()
p <- 1
wg.Done()
}(key, idx)
}
wg.Wait()
mergeResp := []byte(fmt.Sprintf("*%d\r\n", len(keys)))
for _, res := range result {
mergeResp = append(mergeResp, res...)
}
// log.Info("MGET merger resp ", string(mergeResp))
s.write2client(mergeResp)
}
func HandleConn(ps *ProxyServer, c net.Conn) {
addr := c.RemoteAddr().String()
// log.Info("start process Session, receive remote host ", addr)
s := NewSession(ps, c)
if int64(len(ps.SessMgr)) > ps.Conf.MaxConn {
log.Warning("reached max connection, close ", addr)
s.Close()
return
}
ps.SessMgr[addr] = s
defer delete(ps.SessMgr, addr)
for {
reqstr, err := parseReq(s.r)
//for stats
s.LastAccess = time.Now().UnixNano() / 1e3
atomic.AddInt64(&s.Proxy.OpCount, 1)
req := redis.NewRequest(reqstr)
req.SetError(err)
if err != nil {
if strings.Contains(err.Error(), "connection reset by peer") ||
strings.Contains(err.Error(), "broken pipe") ||
strings.Contains(err.Error(), "use of closed network connection") {
// log.Warning("Session ended by ", err.Error())
return
}
e := s.Write2client(req)
if e != nil {
// log.Warning("Write2client ", e)
return
}
continue
}
reply, shouldClose, handled, err := preCheckCommand(req)
// log.Info(req, reply, shouldClose, handled, err)
req.SetReply(reply)
req.SetError(err)
if err != nil || shouldClose || handled {
s.Write2client(req)
if shouldClose {
// log.("should close from ", c.RemoteAddr())
s.Close()
return
}
continue
}
// spec command : mget mset del inter union .....
if isSpecCommand(req.Name()) {
s.SpecCommandProcess(req)
continue
}
s.Forward(req)
}
}