/
goredis.go
188 lines (180 loc) · 4.2 KB
/
goredis.go
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package main
import (
"net"
"fmt"
"time"
"stathat.com/c/consistent"
"github.com/tigeress/goredis/command"
"os"
"github.com/tigeress/goredis/client"
"flag"
"bufio"
"strings"
"strconv"
)
//把自己注册到dht中
var c =consistent.New()
var servers map[string]string
var kv map[string]string
var keys map[string]int
var hostname string
var conns map[string]net.Conn
var server string
var ip string
var port string
func Init(){
//flags
flag.StringVar(&ip,"ip","localhost","server ip address")
flag.StringVar(&port,"port",":7777","server tcp listen port")
flag.Parse()
server = ip+port
fmt.Println(server)
//command
//fmt.Println(os.Args)
}
func main(){
Init()
hostname,_ =os.Hostname()
servers=make(map[string]string)
servers["clive"]=ip
// servers["clive0"]="7.7.7.7"
// servers["clive1"]="7.7.7.8"
// servers["clive2"]="7.7.7.9"
for k,_ :=range servers{
c.Add(k)
}
fmt.Println(flag.Args())
if flag.Args()[1]=="server" {
if flag.Args()[0]=="start" {
StartServer()
}else if flag.Args()[0]=="stop" {
//quit <- 0
}
}
if flag.Args()[1]=="client" {
fmt.Print("life is short, i use go -.-\n>")
conn,_ :=net.Dial("tcp",server)
for {
line,_,_:=bufio.NewReader(os.Stdin).ReadLine()
conn.Write([]byte(command.EncodeRedisProtocol(command.DecodeText(string(line)))))
response,_:=bufio.NewReader(conn).ReadBytes('\n')
fmt.Println(response)
fmt.Print(">")
}
}
//client.TestClient()
//load Graph, why so slow
if flag.Args()[1]=="loadGraph" {
time.Sleep(100*time.Millisecond)
fmt.Println("loadGraph start: "+time.Now().Format("2006-01-02 15:04:05"))
client.LoadWebGraph()
fmt.Println("loadGraph end: "+time.Now().Format("2006-01-02 15:04:05"))
}
if flag.Args()[1]=="pageRank" {
fmt.Println("pagerank start: "+time.Now().Format("2006-01-02 15:04:05"))
client.PageRank()
fmt.Println("pagerank end: "+time.Now().Format("2006-01-02 15:04:05"))
time.Sleep(1000*time.Second)
}
}
func StartServer(){
kv = make(map[string]string)
keys=make(map[string]int)
ln,err:=net.Listen("tcp",server)
if err!=nil {
fmt.Println(err)
}
fmt.Println("listen on tcp "+server)
for {
conn,err:=ln.Accept()
if err!=nil {
fmt.Println(err)
}
go HandleConnection(conn)
}
}
func HandleConnection(conn net.Conn){
for {
var cmd *command.Command = command.DecodeRedisProtocol(conn)
if cmd == nil {
break
}
//fmt.Println("recv: "+ command.EncodeText(*cmd))
//通过key的第一部分来确定分区
if(cmd.Argc>1){
index:=strings.Index(cmd.Args[1],".")
if index==-1 {
cmd.PartitionKey=cmd.Args[1]
}else{
cmd.PartitionKey=cmd.Args[1][:index]
}
server,_:=c.Get(cmd.PartitionKey)
//fmt.Println("lookup node for key:"+cmd.PartitionKey+"->"+server)
if server!=hostname {
//fmt.Println("forward to another node!")
Send(server,command.EncodeRedisProtocol(*cmd))
}else{
DoCommand(conn,*cmd)
}
}else{
DoCommand(conn,*cmd)
}
}
}
func DoCommand(conn net.Conn,cmd command.Command){
if cmd.Args[0]=="set" {
kv[cmd.Args[1]]=cmd.Args[2]
keys[cmd.PartitionKey]=1;
conn.Write([]byte("succ\n"))
}
if cmd.Args[0]=="get" {
value:=kv[cmd.Args[1]]
conn.Write([]byte(value+"\n"))
}
if cmd.Args[0]=="remove" {
delete(kv,cmd.Args[0])
delete(keys,cmd.PartitionKey)
conn.Write([]byte("succ\n"))
}
if(cmd.Args[0]=="update"){
kv[cmd.Args[1]]=cmd.Args[2]
keys[cmd.PartitionKey]=1;
conn.Write([]byte("succ\n"))
}
if(cmd.Args[0]=="iterate"){
//一次取出所有的key吗？只取partitionKey
var result string=""
for k,_:=range keys{
// fmt.Println("key: "+k)
result=result+k+" "
}
//fmt.Println("result:"+result)
result=result[0:len(result)-1]
conn.Write([]byte(result+"\n"))
}
if(cmd.Args[0]=="incr"){
if kv[cmd.Args[1]]=="" {
kv[cmd.Args[1]]="1"
}else{
prev,_:=strconv.Atoi(kv[cmd.Args[1]])
kv[cmd.Args[1]]=strconv.Itoa(prev+1)
}
conn.Write([]byte("succ\n"))
}
}
func Send(server string, str string){
//第一次调用时，建立一个连接池
for destination,_ := range servers{
if hostname!=destination {
conn_server,err:=net.Dial("tcp",servers[destination])
if err!=nil{
conns[destination]=conn_server
break
}
}
}
//发送消息
if conns[server] !=nil {
fmt.Fprintf(conns[server],str)
}
}