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main.go
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main.go
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package main
import (
"flag"
"fmt"
"geecache"
"log"
"net/http"
)
var db = map[string]string{
"emt":"amily",
"lemu":"486",
"lamu":"Rozwaer",
}
func createGroup()*geecache.Group{
return geecache.NewGroup("lp",2<<10,geecache.Getterfunc(
func(key string) ([]byte, error) {
log.Println("slowly cache begins...")
if v,ok := db[key];ok{
return []byte(v),nil
}
return nil,fmt.Errorf("Not found key %s",key)
}))
}
func startCacheServer(addr string,addrs []string,gee *geecache.Group){
peers := geecache.NewHTTPPOOL(addr)
peers.Set(addrs...)
gee.RegisterGroup(peers)
log.Println("geecache is running at",addr)
log.Fatal(http.ListenAndServe(addr[7:],peers))
}
func startAPIServer(apiAddr string,gee *geecache.Group){
http.Handle("/api", http.HandlerFunc(
func(w http.ResponseWriter, r *http.Request) {
key := r.URL.Query().Get("key")
view, err := gee.Get(key)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
w.Header().Set("Content-Type", "application/octet-stream")
w.Write([]byte(view.String()))
}))
log.Println("fontend server is running at", apiAddr)
log.Fatal(http.ListenAndServe(apiAddr[7:], nil))
}
func main() {
var port int
var api bool
flag.IntVar(&port,"port",8001,"Geecache server port")
flag.BoolVar(&api,"api",false,"start a pi server?")
flag.Parse()
apiAddr := "http://localhost:9999"
addrMap := map[int]string{
8001 : "http://localhost:8001",
8002 : "http://localhost:8002",
8003 : "http://localhost:8003",
}
var addrs []string
for _,v := range addrMap{
addrs = append(addrs, v)
}
gee := createGroup()
if api{
go startAPIServer(apiAddr,gee)
}
startCacheServer(addrMap[port],[]string(addrs),gee)
addr := "localhost:8080"
handler := geecache.NewHTTPPOOL(addr)
log.Println("Now the server is running at ",addr)
http.ListenAndServe(addr,handler)
}