forked from mirror/redis
144 lines
4.6 KiB
Markdown
144 lines
4.6 KiB
Markdown
# Redis client for Golang
|
|
|
|
[](https://travis-ci.org/go-redis/redis)
|
|
[](https://pkg.go.dev/github.com/go-redis/redis/v8?tab=doc)
|
|
|
|
- [Docs](https://redis.uptrace.dev)
|
|
- [Reference](https://pkg.go.dev/github.com/go-redis/redis/v8?tab=doc)
|
|
- [Examples](https://pkg.go.dev/github.com/go-redis/redis/v8?tab=doc#pkg-examples)
|
|
|
|
## Sponsors
|
|
|
|
- [**Uptrace.dev** - distributed traces and metrics](https://uptrace.dev)
|
|
|
|
## Ecosystem
|
|
|
|
- [Redis Cache](https://github.com/go-redis/cache).
|
|
- [Rate limiting](https://github.com/go-redis/redis_rate).
|
|
- [Distributed Locks](https://github.com/bsm/redislock).
|
|
|
|
## Features
|
|
|
|
- Redis 3 commands except QUIT, MONITOR, SLOWLOG and SYNC.
|
|
- Automatic connection pooling with
|
|
[circuit breaker](https://en.wikipedia.org/wiki/Circuit_breaker_design_pattern) support.
|
|
- [Pub/Sub](https://pkg.go.dev/github.com/go-redis/redis/v8?tab=doc#PubSub).
|
|
- [Transactions](https://pkg.go.dev/github.com/go-redis/redis/v8?tab=doc#example-Client-TxPipeline).
|
|
- [Pipeline](https://pkg.go.dev/github.com/go-redis/redis/v8?tab=doc#example-Client-Pipeline) and
|
|
[TxPipeline](https://pkg.go.dev/github.com/go-redis/redis/v8?tab=doc#example-Client-TxPipeline).
|
|
- [Scripting](https://pkg.go.dev/github.com/go-redis/redis/v8?tab=doc#Script).
|
|
- [Timeouts](https://pkg.go.dev/github.com/go-redis/redis/v8?tab=doc#Options).
|
|
- [Redis Sentinel](https://pkg.go.dev/github.com/go-redis/redis/v8?tab=doc#NewFailoverClient).
|
|
- [Redis Cluster](https://pkg.go.dev/github.com/go-redis/redis/v8?tab=doc#NewClusterClient).
|
|
- [Cluster of Redis Servers](https://pkg.go.dev/github.com/go-redis/redis/v8?tab=doc#example-NewClusterClient--ManualSetup)
|
|
without using cluster mode and Redis Sentinel.
|
|
- [Ring](https://pkg.go.dev/github.com/go-redis/redis/v8?tab=doc#NewRing).
|
|
- [Instrumentation](https://pkg.go.dev/github.com/go-redis/redis/v8?tab=doc#ex-package--Instrumentation).
|
|
|
|
API docs: https://pkg.go.dev/github.com/go-redis/redis/v8?tab=doc. Examples:
|
|
https://pkg.go.dev/github.com/go-redis/redis/v8?tab=doc#pkg-examples.
|
|
|
|
## Installation
|
|
|
|
go-redis requires a Go version with [Modules](https://github.com/golang/go/wiki/Modules) support and
|
|
uses import versioning. So please make sure to initialize a Go module before installing go-redis:
|
|
|
|
```shell
|
|
go mod init github.com/my/repo
|
|
go get github.com/go-redis/redis/v8
|
|
```
|
|
|
|
Import:
|
|
|
|
```go
|
|
import "github.com/go-redis/redis/v8"
|
|
```
|
|
|
|
## Quickstart
|
|
|
|
```go
|
|
func ExampleNewClient() {
|
|
rdb := redis.NewClient(&redis.Options{
|
|
Addr: "localhost:6379",
|
|
Password: "", // no password set
|
|
DB: 0, // use default DB
|
|
})
|
|
|
|
pong, err := rdb.Ping(ctx).Result()
|
|
fmt.Println(pong, err)
|
|
// Output: PONG <nil>
|
|
}
|
|
|
|
func ExampleClient() {
|
|
rdb := redis.NewClient(&redis.Options{
|
|
Addr: "localhost:6379",
|
|
Password: "", // no password set
|
|
DB: 0, // use default DB
|
|
})
|
|
err := rdb.Set(ctx, "key", "value", 0).Err()
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
|
|
val, err := rdb.Get(ctx, "key").Result()
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
fmt.Println("key", val)
|
|
|
|
val2, err := rdb.Get(ctx, "key2").Result()
|
|
if err == redis.Nil {
|
|
fmt.Println("key2 does not exist")
|
|
} else if err != nil {
|
|
panic(err)
|
|
} else {
|
|
fmt.Println("key2", val2)
|
|
}
|
|
// Output: key value
|
|
// key2 does not exist
|
|
}
|
|
```
|
|
|
|
## Howto
|
|
|
|
Please go through [examples](https://pkg.go.dev/github.com/go-redis/redis/v8?tab=doc#pkg-examples)
|
|
to get an idea how to use this package.
|
|
|
|
## Look and feel
|
|
|
|
Some corner cases:
|
|
|
|
```go
|
|
// SET key value EX 10 NX
|
|
set, err := rdb.SetNX(ctx, "key", "value", 10*time.Second).Result()
|
|
|
|
// SORT list LIMIT 0 2 ASC
|
|
vals, err := rdb.Sort(ctx, "list", &redis.Sort{Offset: 0, Count: 2, Order: "ASC"}).Result()
|
|
|
|
// ZRANGEBYSCORE zset -inf +inf WITHSCORES LIMIT 0 2
|
|
vals, err := rdb.ZRangeByScoreWithScores(ctx, "zset", &redis.ZRangeBy{
|
|
Min: "-inf",
|
|
Max: "+inf",
|
|
Offset: 0,
|
|
Count: 2,
|
|
}).Result()
|
|
|
|
// ZINTERSTORE out 2 zset1 zset2 WEIGHTS 2 3 AGGREGATE SUM
|
|
vals, err := rdb.ZInterStore(ctx, "out", &redis.ZStore{
|
|
Keys: []string{"zset1", "zset2"},
|
|
Weights: []int64{2, 3}
|
|
}).Result()
|
|
|
|
// EVAL "return {KEYS[1],ARGV[1]}" 1 "key" "hello"
|
|
vals, err := rdb.Eval(ctx, "return {KEYS[1],ARGV[1]}", []string{"key"}, "hello").Result()
|
|
|
|
// custom command
|
|
res, err := rdb.Do(ctx, "set", "key", "value").Result()
|
|
```
|
|
|
|
## See also
|
|
|
|
- [Golang PostgreSQL ORM](https://github.com/go-pg/pg)
|
|
- [Golang msgpack](https://github.com/vmihailenco/msgpack)
|
|
- [Golang message task queue](https://github.com/vmihailenco/taskq)
|