go-redis使用

bytemode · · 22045 次点击 · · 开始浏览    
这是一个创建于 的文章,其中的信息可能已经有所发展或是发生改变。

``` package main import ( "fmt" "log" "math/rand" "sync" "time" "github.com/go-redis/redis" ) var redisdb *redis.Client var wg sync.WaitGroup func main() { wg.Add(1) go testRedisBase() wg.Wait() } func testRedisBase() { defer wg.Done() //连接服务器 redisdb = redis.NewClient(&redis.Options{ Addr: "localhost:6379", // use default Addr Password: "", // no password set DB: 0, // use default DB }) //心跳 pong, err := redisdb.Ping().Result() log.Println(pong, err) // Output: PONG <nil> ExampleClient_String() ExampleClient_List() ExampleClient_Hash() ExampleClient_Set() ExampleClient_SortSet() ExampleClient_HyperLogLog() ExampleClient_CMD() ExampleClient_Scan() ExampleClient_Tx() ExampleClient_Script() ExampleClient_PubSub() } func ExampleClient_String() { log.Println("ExampleClient_String") defer log.Println("ExampleClient_String") //kv读写 err := redisdb.Set("key", "value", 1*time.Second).Err() log.Println(err) //获取过期时间 tm, err := redisdb.TTL("key").Result() log.Println(tm) val, err := redisdb.Get("key").Result() log.Println(val, err) val2, err := redisdb.Get("missing_key").Result() if err == redis.Nil { log.Println("missing_key does not exist") } else if err != nil { log.Println("missing_key", val2, err) } //不存在才设置 过期时间 nx ex value, err := redisdb.SetNX("counter", 0, 1*time.Second).Result() log.Println("setnx", value, err) //Incr result, err := redisdb.Incr("counter").Result() log.Println("Incr", result, err) } func ExampleClient_List() { log.Println("ExampleClient_List") defer log.Println("ExampleClient_List") //添加 log.Println(redisdb.RPush("list_test", "message1").Err()) log.Println(redisdb.RPush("list_test", "message2").Err()) //设置 log.Println(redisdb.LSet("list_test", 2, "message set").Err()) //remove ret, err := redisdb.LRem("list_test", 3, "message1").Result() log.Println(ret, err) rLen, err := redisdb.LLen("list_test").Result() log.Println(rLen, err) //遍历 lists, err := redisdb.LRange("list_test", 0, rLen-1).Result() log.Println("LRange", lists, err) //pop没有时阻塞 result, err := redisdb.BLPop(1*time.Second, "list_test").Result() log.Println("result:", result, err, len(result)) } func ExampleClient_Hash() { log.Println("ExampleClient_Hash") defer log.Println("ExampleClient_Hash") datas := map[string]interface{}{ "name": "LI LEI", "sex": 1, "age": 28, "tel": 123445578, } //添加 if err := redisdb.HMSet("hash_test", datas).Err(); err != nil { log.Fatal(err) } //获取 rets, err := redisdb.HMGet("hash_test", "name", "sex").Result() log.Println("rets:", rets, err) //成员 retAll, err := redisdb.HGetAll("hash_test").Result() log.Println("retAll", retAll, err) //存在 bExist, err := redisdb.HExists("hash_test", "tel").Result() log.Println(bExist, err) bRet, err := redisdb.HSetNX("hash_test", "id", 100).Result() log.Println(bRet, err) //删除 log.Println(redisdb.HDel("hash_test", "age").Result()) } func ExampleClient_Set() { log.Println("ExampleClient_Set") defer log.Println("ExampleClient_Set") //添加 ret, err := redisdb.SAdd("set_test", "11", "22", "33", "44").Result() log.Println(ret, err) //数量 count, err := redisdb.SCard("set_test").Result() log.Println(count, err) //删除 ret, err = redisdb.SRem("set_test", "11", "22").Result() log.Println(ret, err) //成员 members, err := redisdb.SMembers("set_test").Result() log.Println(members, err) bret, err := redisdb.SIsMember("set_test", "33").Result() log.Println(bret, err) redisdb.SAdd("set_a", "11", "22", "33", "44") redisdb.SAdd("set_b", "11", "22", "33", "55", "66", "77") //差集 diff, err := redisdb.SDiff("set_a", "set_b").Result() log.Println(diff, err) //交集 inter, err := redisdb.SInter("set_a", "set_b").Result() log.Println(inter, err) //并集 union, err := redisdb.SUnion("set_a", "set_b").Result() log.Println(union, err) ret, err = redisdb.SDiffStore("set_diff", "set_a", "set_b").Result() log.Println(ret, err) rets, err := redisdb.SMembers("set_diff").Result() log.Println(rets, err) } func ExampleClient_SortSet() { log.Println("ExampleClient_SortSet") defer log.Println("ExampleClient_SortSet") addArgs := make([]redis.Z, 100) for i := 1; i < 100; i++ { addArgs = append(addArgs, redis.Z{Score: float64(i), Member: fmt.Sprintf("a_%d", i)}) } //log.Println(addArgs) Shuffle := func(slice []redis.Z) { r := rand.New(rand.NewSource(time.Now().Unix())) for len(slice) > 0 { n := len(slice) randIndex := r.Intn(n) slice[n-1], slice[randIndex] = slice[randIndex], slice[n-1] slice = slice[:n-1] } } //随机打乱 Shuffle(addArgs) //添加 ret, err := redisdb.ZAddNX("sortset_test", addArgs...).Result() log.Println(ret, err) //获取指定成员score score, err := redisdb.ZScore("sortset_test", "a_10").Result() log.Println(score, err) //获取制定成员的索引 index, err := redisdb.ZRank("sortset_test", "a_50").Result() log.Println(index, err) count, err := redisdb.SCard("sortset_test").Result() log.Println(count, err) //返回有序集合指定区间内的成员 rets, err := redisdb.ZRange("sortset_test", 10, 20).Result() log.Println(rets, err) //返回有序集合指定区间内的成员分数从高到低 rets, err = redisdb.ZRevRange("sortset_test", 10, 20).Result() log.Println(rets, err) //指定分数区间的成员列表 rets, err = redisdb.ZRangeByScore("sortset_test", redis.ZRangeBy{Min: "(30", Max: "(50", Offset: 1, Count: 10}).Result() log.Println(rets, err) } //用来做基数统计的算法,HyperLogLog 的优点是,在输入元素的数量或者体积非常非常大时,计算基数所需的空间总是固定 的、并且是很小的。 //每个 HyperLogLog 键只需要花费 12 KB 内存,就可以计算接近 2^64 个不同元素的基 数 func ExampleClient_HyperLogLog() { log.Println("ExampleClient_HyperLogLog") defer log.Println("ExampleClient_HyperLogLog") for i := 0; i < 10000; i++ { redisdb.PFAdd("pf_test_1", fmt.Sprintf("pfkey%d", i)) } ret, err := redisdb.PFCount("pf_test_1").Result() log.Println(ret, err) for i := 0; i < 10000; i++ { redisdb.PFAdd("pf_test_2", fmt.Sprintf("pfkey%d", i)) } ret, err = redisdb.PFCount("pf_test_2").Result() log.Println(ret, err) redisdb.PFMerge("pf_test", "pf_test_2", "pf_test_1") ret, err = redisdb.PFCount("pf_test").Result() log.Println(ret, err) } func ExampleClient_PubSub() { log.Println("ExampleClient_PubSub") defer log.Println("ExampleClient_PubSub") //发布订阅 pubsub := redisdb.Subscribe("subkey") _, err := pubsub.Receive() if err != nil { log.Fatal("pubsub.Receive") } ch := pubsub.Channel() time.AfterFunc(1*time.Second, func() { log.Println("Publish") err = redisdb.Publish("subkey", "test publish 1").Err() if err != nil { log.Fatal("redisdb.Publish", err) } redisdb.Publish("subkey", "test publish 2") }) for msg := range ch { log.Println("recv channel:", msg.Channel, msg.Pattern, msg.Payload) } } func ExampleClient_CMD() { log.Println("ExampleClient_CMD") defer log.Println("ExampleClient_CMD") //执行自定义redis命令 Get := func(rdb *redis.Client, key string) *redis.StringCmd { cmd := redis.NewStringCmd("get", key) redisdb.Process(cmd) return cmd } v, err := Get(redisdb, "NewStringCmd").Result() log.Println("NewStringCmd", v, err) v, err = redisdb.Do("get", "redisdb.do").String() log.Println("redisdb.Do", v, err) } func ExampleClient_Scan() { log.Println("ExampleClient_Scan") defer log.Println("ExampleClient_Scan") //scan for i := 1; i < 1000; i++ { redisdb.Set(fmt.Sprintf("skey_%d", i), i, 0) } cusor := uint64(0) for { keys, retCusor, err := redisdb.Scan(cusor, "skey_*", int64(100)).Result() log.Println(keys, cusor, err) cusor = retCusor if cusor == 0 { break } } } func ExampleClient_Tx() { pipe := redisdb.TxPipeline() incr := pipe.Incr("tx_pipeline_counter") pipe.Expire("tx_pipeline_counter", time.Hour) // Execute // // MULTI // INCR pipeline_counter // EXPIRE pipeline_counts 3600 // EXEC // // using one rdb-server roundtrip. _, err := pipe.Exec() fmt.Println(incr.Val(), err) } func ExampleClient_Script() { IncrByXX := redis.NewScript(` if redis.call("GET", KEYS[1]) ~= false then return redis.call("INCRBY", KEYS[1], ARGV[1]) end return false `) n, err := IncrByXX.Run(redisdb, []string{"xx_counter"}, 2).Result() fmt.Println(n, err) err = redisdb.Set("xx_counter", "40", 0).Err() if err != nil { panic(err) } n, err = IncrByXX.Run(redisdb, []string{"xx_counter"}, 2).Result() fmt.Println(n, err) } ```

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