1. go操作memcached

go使用memcached需要第三方的驱动库，这里有一个库是memcached作者亲自实现的，代码质量效率肯定会有保障

1.1.1. 安装

  1.     go get github.com/bradfitz/gomemcache/memcache

1.1.2. 使用

  1.     import "github.com/bradfitz/gomemcache/memcache"

1.1.3. 栗子(吃的那种)

  1. package main
  3. import (
  4.     "fmt"
  5.     "github.com/bradfitz/gomemcache/memcache"
  6. )
  8. var (
  9.     server = "127.0.0.1:11211"
  10. )
  12. func main() {
  13.     //create a handle
  14.     mc := memcache.New(server)
  15.     if mc == nil {
  16.         fmt.Println("memcache New failed")
  17.     }
  19.     //set key-value
  20.     mc.Set(&memcache.Item{Key: "foo", Value: []byte("my value")})
  22.     //get key's value
  23.     it, _ := mc.Get("foo")
  24.     if string(it.Key) == "foo" {
  25.         fmt.Println("value is ", string(it.Value))
  26.     } else {
  27.         fmt.Println("Get failed")
  28.     }
  29.     ///Add a new key-value
  30.     mc.Add(&memcache.Item{Key: "foo", Value: []byte("bluegogo")})
  31.     it, err := mc.Get("foo")
  32.     if err != nil {
  33.         fmt.Println("Add failed")
  34.     } else {
  35.         if string(it.Key) == "foo" {
  36.             fmt.Println("Add value is ", string(it.Value))
  37.         } else {
  38.             fmt.Println("Get failed")
  39.         }
  40.     }
  41.     //replace a key's value
  42.     mc.Replace(&memcache.Item{Key: "foo", Value: []byte("mobike")})
  43.     it, err = mc.Get("foo")
  44.     if err != nil {
  45.         fmt.Println("Replace failed")
  46.     } else {
  47.         if string(it.Key) == "foo" {
  48.             fmt.Println("Replace value is ", string(it.Value))
  49.         } else {
  50.             fmt.Println("Replace failed")
  51.         }
  52.     }
  53.     //delete an exist key
  54.     err = mc.Delete("foo")
  55.     if err != nil {
  56.         fmt.Println("Delete failed:", err.Error())
  57.     }
  58.     //incrby
  59.     err = mc.Set(&memcache.Item{Key: "aaa", Value: []byte("1")})
  60.     if err != nil {
  61.         fmt.Println("Set failed :", err.Error())
  62.     }
  63.     it, err = mc.Get("foo")
  64.     if err != nil {
  65.         fmt.Println("Get failed ", err.Error())
  66.     } else {
  67.         fmt.Println("src value is:", it.Value)
  68.     }
  69.     value, err := mc.Increment("aaa", 7)
  70.     if err != nil {
  71.         fmt.Println("Increment failed")
  72.     } else {
  73.         fmt.Println("after increment the value is :", value)
  74.     }
  75.     //decrby
  76.     value, err = mc.Decrement("aaa", 4)
  77.     if err != nil {
  78.         fmt.Println("Decrement failed", err.Error())
  79.     } else {
  80.         fmt.Println("after decrement the value is ", value)
  81.     }
  82. }