Exemplo n.º 1
0
func ExampleScript(c redis.Conn, reply interface{}, err error) {
	// Initialize a package-level variable with a script.
	var getScript = redis.NewScript(1, `return redis.call('get', KEYS[1])`)

	// In a function, use the script Do method to evaluate the script. The Do
	// method optimistically uses the EVALSHA command. If the script is not
	// loaded, then the Do method falls back to the EVAL command.
	reply, err = getScript.Do(c, "foo")
}
Exemplo n.º 2
0
func TestScript(t *testing.T) {
	c, err := redis.DialDefaultServer()
	if err != nil {
		t.Fatalf("error connection to database, %v", err)
	}
	defer c.Close()

	// To test fall back in Do, we make script unique by adding comment with current time.
	script := fmt.Sprintf("--%d\nreturn {KEYS[1],KEYS[2],ARGV[1],ARGV[2]}", time.Now().UnixNano())
	s := redis.NewScript(2, script)
	reply := []interface{}{[]byte("key1"), []byte("key2"), []byte("arg1"), []byte("arg2")}

	v, err := s.Do(c, "key1", "key2", "arg1", "arg2")
	if err != nil {
		t.Errorf("s.Do(c, ...) returned %v", err)
	}

	if !reflect.DeepEqual(v, reply) {
		t.Errorf("s.Do(c, ..); = %v, want %v", v, reply)
	}

	err = s.Load(c)
	if err != nil {
		t.Errorf("s.Load(c) returned %v", err)
	}

	err = s.SendHash(c, "key1", "key2", "arg1", "arg2")
	if err != nil {
		t.Errorf("s.SendHash(c, ...) returned %v", err)
	}

	err = c.Flush()
	if err != nil {
		t.Errorf("c.Flush() returned %v", err)
	}

	v, err = c.Receive()
	if !reflect.DeepEqual(v, reply) {
		t.Errorf("s.SendHash(c, ..); c.Receive() = %v, want %v", v, reply)
	}

	err = s.Send(c, "key1", "key2", "arg1", "arg2")
	if err != nil {
		t.Errorf("s.Send(c, ...) returned %v", err)
	}

	err = c.Flush()
	if err != nil {
		t.Errorf("c.Flush() returned %v", err)
	}

	v, err = c.Receive()
	if !reflect.DeepEqual(v, reply) {
		t.Errorf("s.Send(c, ..); c.Receive() = %v, want %v", v, reply)
	}

}
Exemplo n.º 3
0
		}

		if queued != nil {
			result = members[0]
			break
		}
	}

	return result, nil
}

// zpopScript pops a value from a ZSET.
var zpopScript = redis.NewScript(1, `
    local r = redis.call('ZRANGE', KEYS[1], 0, 0)
    if r ~= nil then
        r = r[1]
        redis.call('ZREM', KEYS[1], r)
    end
    return r
`)

// This example implements ZPOP as described at
// http://redis.io/topics/transactions using WATCH/MULTI/EXEC and scripting.
func Example_zpop() {
	c, err := dial()
	if err != nil {
		fmt.Println(err)
		return
	}
	defer c.Close()

	// Add test data using a pipeline.