/
main.go
164 lines (138 loc) · 3.29 KB
/
main.go
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package main
import (
"log"
"os"
"regexp"
"strconv"
"strings"
"time"
"github.com/rainycape/memcache"
"github.com/jolivares/memcache-cmd/Godeps/_workspace/src/github.com/codegangsta/cli"
"github.com/jolivares/memcache-cmd/Godeps/_workspace/src/github.com/ziutek/telnet"
)
const timeout = 10 * time.Second
func main() {
app := cli.NewApp()
app.Name = "memcahe-cmd"
hostFlag := cli.StringFlag{
Name: "host",
Value: "127.0.0.1:11211",
Usage: "target host",
}
prefixFlag := cli.StringFlag{
Name: "prefix",
Value: "",
Usage: "keys prefix",
}
app.Commands = []cli.Command{
{
Name: "list-keys",
Aliases: []string{"l"},
Usage: "list keys",
Flags: []cli.Flag{
hostFlag,
prefixFlag,
},
Action: func(c *cli.Context) {
listKeys(c.String("host"), c.String("prefix"))
},
},
{
Name: "delete-entries",
Aliases: []string{"d"},
Usage: "delete entries",
Flags: []cli.Flag{
hostFlag,
prefixFlag,
},
Action: func(c *cli.Context) {
deleteKeys(c.String("host"), c.String("prefix"))
},
},
}
app.Run(os.Args)
}
func deleteKeys(addr string, prefix string) {
println("Deleting keys (hosts = "+addr, ", prefix = '"+prefix+"')")
t, err := telnet.Dial("tcp", addr)
checkErr(err)
t.SetUnixWriteMode(true)
slabs := getSlabs(t)
keys := findKeys(t, slabs, prefix)
mc, e1 := memcache.New(addr)
checkErr(e1)
for i := range keys {
key := keys[i]
log.Printf("Removing key: %s", key)
e2 := mc.Delete(key)
checkErr(e2)
}
}
func listKeys(addr string, prefix string) {
println("Listing keys (hosts = "+addr, ", prefix = '"+prefix+"')")
t, err := telnet.Dial("tcp", addr)
checkErr(err)
t.SetUnixWriteMode(true)
slabs := getSlabs(t)
keys := findKeys(t, slabs, prefix)
for i := range keys {
log.Printf("key: %s", keys[i])
}
}
func findKeys(t *telnet.Conn, slabs map[string]int64, prefix string) []string {
var keys []string
r, err := regexp.Compile(`ITEM (.+?) \[(\d+) b; (\d+) s\]`)
checkErr(err)
for k, v := range slabs {
sendln(t, "stats cachedump "+k+" "+strconv.FormatInt(v, 10))
line, e := t.ReadString('\n')
checkErr(e)
for !strings.HasPrefix(line, "END") {
// log.Printf("Got item line: %s", line)
if r.MatchString(line) == true {
m := r.FindStringSubmatch(line)
key := m[1]
if len(prefix) == 0 || (len(prefix) > 0 && strings.HasPrefix(key, prefix)) {
keys = append(keys, key)
}
}
line, e = t.ReadString('\n')
checkErr(e)
}
}
return keys
}
func getSlabs(t *telnet.Conn) map[string]int64 {
var line string
slabs := make(map[string]int64)
r, err := regexp.Compile(`STAT items:(\d+):number (\d+)`) // slab id & slab items
checkErr(err)
sendln(t, "stats items")
line, e := t.ReadString('\n')
checkErr(e)
for !strings.HasPrefix(line, "END") {
// log.Printf("Got slab line: %s", line)
if r.MatchString(line) == true {
m := r.FindStringSubmatch(line)
i, e1 := strconv.ParseInt(m[2], 10, 64)
checkErr(e1)
slabs[m[1]] = i
}
line, e = t.ReadString('\n')
checkErr(e)
}
return slabs
}
func checkErr(err error) {
if err != nil {
log.Fatalln("Error:", err)
}
}
func sendln(t *telnet.Conn, s string) {
checkErr(t.SetWriteDeadline(time.Now().Add(timeout)))
buf := make([]byte, len(s)+1)
copy(buf, s)
buf[len(s)] = '\n'
_, err := t.Write(buf)
checkErr(err)
}