vikunja-api/vendor/github.com/go-redis/redis/v7/README.md

Redis client for Golang

Supports:

• Redis 3 commands except QUIT, MONITOR, SLOWLOG and SYNC.
• Automatic connection pooling with circuit breaker support.
• Pub/Sub.
• Transactions.
• Pipeline and TxPipeline.
• Scripting.
• Timeouts.
• Redis Sentinel.
• Redis Cluster.
• Cluster of Redis Servers without using cluster mode and Redis Sentinel.
• Ring.
• Instrumentation.
• Cache friendly.
• Rate limiting.
• Distributed Locks.

API docs: https://godoc.org/github.com/go-redis/redis. Examples: https://godoc.org/github.com/go-redis/redis#pkg-examples.

Installation

go-redis requires a Go version with Modules support and uses import versioning. So please make sure to initialize a Go module before installing go-redis:

go mod init github.com/my/repo
go get github.com/go-redis/redis/v7

Import:

import "github.com/go-redis/redis/v7"

Quickstart

func ExampleNewClient() {
	client := redis.NewClient(&redis.Options{
		Addr:     "localhost:6379",
		Password: "", // no password set
		DB:       0,  // use default DB
	})

	pong, err := client.Ping().Result()
	fmt.Println(pong, err)
	// Output: PONG <nil>
}

func ExampleClient() {
	client := redis.NewClient(&redis.Options{
		Addr:     "localhost:6379",
		Password: "", // no password set
		DB:       0,  // use default DB
	})
	err := client.Set("key", "value", 0).Err()
	if err != nil {
		panic(err)
	}

	val, err := client.Get("key").Result()
	if err != nil {
		panic(err)
	}
	fmt.Println("key", val)

	val2, err := client.Get("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 to get an idea how to use this package.

Look and feel

Some corner cases:

// SET key value EX 10 NX
set, err := client.SetNX("key", "value", 10*time.Second).Result()

// SORT list LIMIT 0 2 ASC
vals, err := client.Sort("list", &redis.Sort{Offset: 0, Count: 2, Order: "ASC"}).Result()

// ZRANGEBYSCORE zset -inf +inf WITHSCORES LIMIT 0 2
vals, err := client.ZRangeByScoreWithScores("zset", &redis.ZRangeBy{
	Min: "-inf",
	Max: "+inf",
	Offset: 0,
	Count: 2,
}).Result()

// ZINTERSTORE out 2 zset1 zset2 WEIGHTS 2 3 AGGREGATE SUM
vals, err := client.ZInterStore("out", &redis.ZStore{
	Keys: []string{"zset1", "zset2"},
	Weights: []int64{2, 3}
}).Result()

// EVAL "return {KEYS[1],ARGV[1]}" 1 "key" "hello"
vals, err := client.Eval("return {KEYS[1],ARGV[1]}", []string{"key"}, "hello").Result()

// custom command
res, err := client.Do("set", "key", "value").Result()

See also

• Golang PostgreSQL ORM
• Golang msgpack
• Golang message task queue