Beispiel #1
0
func test(c *redis.Client, ch chan struct{}, doneChan chan struct{}, command string, params ...interface{}) {
	for _ = range ch {
		r := c.Call(command, params...)
		if r.Err != nil {
			fmt.Println(r.Err)
			os.Exit(1)
		}
	}
	doneChan <- struct{}{}
}
Beispiel #2
0
func main() {
	var c *redis.Client

	conf := redis.DefaultConfig()
	// Network and address
	//
	// Default are "tcp" and "127.0.0.1:6379" so these are commented out.

	// TCP example:
	// conf.Network = "tcp"
	// conf.Address = "127.0.0.1:6379"

	// Unix example:
	// conf.Network = "unix"
	// conf.Address = "/tmp/redis.sock"

	conf.Database = 8                              // Database number
	conf.Timeout = time.Duration(10) * time.Second // Socket timeout
	c = redis.NewClient(conf)

	defer c.Close()

	//** Blocking calls
	rep := c.Flushdb()
	if rep.Err != nil {
		fmt.Println("redis:", rep.Err)
		return
	}

	//* Strings

	// It's generally good idea to check for errors like this,
	// but for the sake of keeping this example short we'll omit these from now on.
	if rep = c.Set("mykey0", "myval0"); rep.Err != nil {
		fmt.Println("redis:", rep.Err)
		return
	}

	var err error
	var s string
	if rep = c.Get("mykey0_may_not_exist"); rep.Type == redis.ReplyNil {
		//key not found
		fmt.Println("key not found ")

	} else if s, err = rep.Str(); err != nil {

		fmt.Println("Get error ", err)

		return
	}
	fmt.Println("mykey0:", s)

	myhash := map[string]string{
		"mykey1": "myval1",
		"mykey2": "myval2",
		"mykey3": "myval3",
	}

	// Alternatively:
	// c.Mset("mykey1", "myval1", "mykey2", "myval2", "mykey3", "myval3")
	c.Mset(myhash)

	ls, err := c.Mget("mykey1", "mykey2", "mykey3").List()
	if err != nil {
		fmt.Println(err)
		return
	}

	fmt.Println("mykeys values:", ls)

	//* List handling
	mylist := []string{"foo", "bar", "qux"}

	// Alternativaly:
	// c.Rpush("mylist", "foo", "bar", "qux")
	c.Rpush("mylist", mylist)

	mylist, err = c.Lrange("mylist_may_not_exist", 0, -1).List()
	if err != nil {
		fmt.Println(err)
		return
	}

	fmt.Println("mylist:", mylist)

	//* Hash handling

	// Alternatively:
	// c.Hmset("myhash", ""mykey1", "myval1", "mykey2", "myval2", "mykey3", "myval3")
	c.Hmset("myhash", myhash)

	myhash, err = c.Hgetall("myhash").Hash()
	if err != nil {
		fmt.Println(err)
		return
	}

	fmt.Println("myhash:", myhash)

	//* Multicalls
	rep = c.MultiCall(func(mc *redis.MultiCall) {
		mc.Set("multikey", "multival")
		mc.Get("multikey")
	})
	// Multicall reply is guaranteed to have the same number of sub-replies as calls,
	// if it succeeds. They can be accessed through Reply.Elems.
	if rep.Err != nil {
		fmt.Println(rep.Err)
		return
	}

	s, err = rep.Elems[1].Str()
	if err != nil {
		fmt.Println(err)
		return
	}

	fmt.Println("multikey:", s)

	//* Transactions
	rep = c.Transaction(func(mc *redis.MultiCall) {
		mc.Set("trankey", "tranval")
		mc.Get("trankey")
	})
	if rep.Err != nil {
		fmt.Println(rep.Err)
		return
	}

	s, err = rep.Elems[1].Str()
	if err != nil {
		fmt.Println(err)
		return
	}

	fmt.Println("trankey:", s)

	//* Complex transactions
	//  Atomic INCR replacement with transactions
	myIncr := func(key string) *redis.Reply {
		return c.MultiCall(func(mc *redis.MultiCall) {
			var curval int

			mc.Watch(key)
			mc.Get(key)
			rep := mc.Flush()
			if rep.Err != nil {
				return
			}

			s, err := rep.Elems[1].Str()
			if err == nil {
				curval, err = strconv.Atoi(s)
			}
			nextval := curval + 1

			mc.Multi()
			mc.Set(key, nextval)
			mc.Exec()
		})
	}

	myIncr("ctrankey")
	myIncr("ctrankey")
	myIncr("ctrankey")

	s, err = c.Get("ctrankey").Str()
	if err != nil {
		fmt.Println(err)
		return
	}

	fmt.Println("ctrankey:", s)

	//** Asynchronous calls
	c.Set("asynckey", "asyncval")
	fut := c.AsyncGet("asynckey")

	// do something here

	// block until reply is available
	s, err = fut.Reply().Str()
	if err != nil {
		fmt.Println(err)
		return
	}

	fmt.Println("asynckey:", s)

	//* Pub/sub
	msgHdlr := func(msg *redis.Message) {
		switch msg.Type {
		case redis.MessageMessage:
			fmt.Printf("Received message \"%s\" from channel \"%s\".\n", msg.Payload, msg.Channel)
		case redis.MessagePmessage:
			fmt.Printf("Received pattern message \"%s\" from channel \"%s\" with pattern "+
				"\"%s\".\n", msg.Payload, msg.Channel, msg.Pattern)
		default:
			fmt.Println("Received other message:", msg)
		}
	}

	sub, err_ := c.Subscription(msgHdlr)
	if err_ != nil {
		fmt.Printf("Failed to subscribe: '%s'!\n", err_)
		return
	}

	defer sub.Close()

	sub.Subscribe("chan1", "chan2")
	sub.Psubscribe("chan*")

	c.Publish("chan1", "foo")
	sub.Unsubscribe("chan1")
	c.Publish("chan2", "bar")

	// give some time for the message handler to receive the messages
	time.Sleep(time.Second)
}
Beispiel #3
0
func setHandle(data string, c *redis.Client, ch chan struct{}) {
	for _ = range ch {
		c.Set(key, data)
	}
}
Beispiel #4
0
func getHandle(data string, c *redis.Client, ch chan struct{}) {
	for _ = range ch {
		c.Get(key)
	}
}
Beispiel #5
0
func pingHandle(data string, c *redis.Client, ch chan struct{}) {
	for _ = range ch {
		c.Ping()
	}
}