Beispiel #1
0
func ExampleScanSlice() {
	c, err := dial()
	if err != nil {
		fmt.Println(err)
		return
	}
	defer c.Close()

	c.Send("HMSET", "album:1", "title", "Red", "rating", 5)
	c.Send("HMSET", "album:2", "title", "Earthbound", "rating", 1)
	c.Send("HMSET", "album:3", "title", "Beat", "rating", 4)
	c.Send("LPUSH", "albums", "1")
	c.Send("LPUSH", "albums", "2")
	c.Send("LPUSH", "albums", "3")
	values, err := redis.Values(c.Do("SORT", "albums",
		"BY", "album:*->rating",
		"GET", "album:*->title",
		"GET", "album:*->rating"))
	if err != nil {
		fmt.Println(err)
		return
	}

	var albums []struct {
		Title  string
		Rating int
	}
	if err := redis.ScanSlice(values, &albums); err != nil {
		fmt.Println(err)
		return
	}
	fmt.Printf("%v\n", albums)
	// Output:
	// [{Earthbound 1} {Beat 4} {Red 5}]
}
Beispiel #2
0
func TestBlankCommmand(t *testing.T) {
	c, err := redistest.Dial()
	if err != nil {
		t.Fatalf("error connection to database, %v", err)
	}
	defer c.Close()

	for _, cmd := range testCommands {
		if err := c.Send(cmd.args[0].(string), cmd.args[1:]...); err != nil {
			t.Fatalf("Send(%v) returned error %v", cmd.args, err)
		}
	}
	reply, err := redis.Values(c.Do(""))
	if err != nil {
		t.Fatalf("Do() returned error %v", err)
	}
	if len(reply) != len(testCommands) {
		t.Fatalf("len(reply)=%d, want %d", len(reply), len(testCommands))
	}
	for i, cmd := range testCommands {
		actual := reply[i]
		if !reflect.DeepEqual(actual, cmd.expected) {
			t.Errorf("Receive(%v) = %v, want %v", cmd.args, actual, cmd.expected)
		}
	}
}
Beispiel #3
0
func ExampleArgs() {
	c, err := dial()
	if err != nil {
		fmt.Println(err)
		return
	}
	defer c.Close()

	var p1, p2 struct {
		Title  string `redis:"title"`
		Author string `redis:"author"`
		Body   string `redis:"body"`
	}

	p1.Title = "Example"
	p1.Author = "Gary"
	p1.Body = "Hello"

	if _, err := c.Do("HMSET", redis.Args{}.Add("id1").AddFlat(&p1)...); err != nil {
		fmt.Println(err)
		return
	}

	m := map[string]string{
		"title":  "Example2",
		"author": "Steve",
		"body":   "Map",
	}

	if _, err := c.Do("HMSET", redis.Args{}.Add("id2").AddFlat(m)...); err != nil {
		fmt.Println(err)
		return
	}

	for _, id := range []string{"id1", "id2"} {

		v, err := redis.Values(c.Do("HGETALL", id))
		if err != nil {
			fmt.Println(err)
			return
		}

		if err := redis.ScanStruct(v, &p2); err != nil {
			fmt.Println(err)
			return
		}

		fmt.Printf("%+v\n", p2)
	}

	// Output:
	// {Title:Example Author:Gary Body:Hello}
	// {Title:Example2 Author:Steve Body:Map}
}
Beispiel #4
0
func c_redis_counters(server string, db int) (opentsdb.MultiDataPoint, error) {
	var md opentsdb.MultiDataPoint
	conn, err := redis.Dial("tcp", server, redis.DialDatabase(db))
	if err != nil {
		return md, err
	}
	defer conn.Close()
	if _, err := conn.Do("CLIENT", "SETNAME", "scollector"); err != nil {
		return md, err
	}
	cursor := 0
	for {
		vals, err := redis.Values(conn.Do("HSCAN", collect.RedisCountersKey, cursor))
		if err != nil {
			return md, err
		}
		if len(vals) != 2 {
			return md, fmt.Errorf("Unexpected number of values")
		}
		cursor, err = redis.Int(vals[0], nil)
		if err != nil {
			return md, err
		}
		pairs, err := redis.StringMap(vals[1], nil)
		if err != nil {
			return md, err
		}
		for mts, val := range pairs {
			parts := strings.Split(mts, ":")
			if len(parts) != 2 {
				slog.Errorf("Invalid metric tag set counter: %s", mts)
				continue
			}
			metric := parts[0]
			tags, err := opentsdb.ParseTags(parts[1])
			if err != nil {
				slog.Errorf("Invalid tags: %s", parts[1])
				continue
			}
			v, err := strconv.Atoi(val)
			if err != nil {
				slog.Errorf("Invalid counter value: %s", val)
				continue
			}
			Add(&md, metric, v, tags, metadata.Counter, metadata.Count, "")
		}
		if cursor == 0 {
			break
		}
	}
	return md, nil
}
Beispiel #5
0
func int64s(reply interface{}, err error) ([]int64, error) {
	if err != nil {
		return nil, slog.Wrap(err)
	}
	ints := []int64{}
	values, err := redis.Values(reply, err)
	if err != nil {
		return ints, slog.Wrap(err)
	}
	if err := redis.ScanSlice(values, &ints); err != nil {
		return ints, slog.Wrap(err)
	}
	return ints, nil
}
Beispiel #6
0
func (d *dataAccess) GetMetricMetadata(metric string) (*MetricMetadata, error) {
	defer collect.StartTimer("redis", opentsdb.TagSet{"op": "GetMetricMeta"})()
	conn := d.GetConnection()
	defer conn.Close()
	v, err := redis.Values(conn.Do("HGETALL", metricMetaKey(metric)))
	if err != nil {
		return nil, err
	}
	if len(v) == 0 {
		return nil, nil
	}
	mm := &MetricMetadata{}
	if err := redis.ScanStruct(v, mm); err != nil {
		return nil, err
	}
	return mm, nil
}
Beispiel #7
0
func ExampleScan() {
	c, err := dial()
	if err != nil {
		fmt.Println(err)
		return
	}
	defer c.Close()

	c.Send("HMSET", "album:1", "title", "Red", "rating", 5)
	c.Send("HMSET", "album:2", "title", "Earthbound", "rating", 1)
	c.Send("HMSET", "album:3", "title", "Beat")
	c.Send("LPUSH", "albums", "1")
	c.Send("LPUSH", "albums", "2")
	c.Send("LPUSH", "albums", "3")
	values, err := redis.Values(c.Do("SORT", "albums",
		"BY", "album:*->rating",
		"GET", "album:*->title",
		"GET", "album:*->rating"))
	if err != nil {
		fmt.Println(err)
		return
	}

	for len(values) > 0 {
		var title string
		rating := -1 // initialize to illegal value to detect nil.
		values, err = redis.Scan(values, &title, &rating)
		if err != nil {
			fmt.Println(err)
			return
		}
		if rating == -1 {
			fmt.Println(title, "not-rated")
		} else {
			fmt.Println(title, rating)
		}
	}
	// Output:
	// Beat not-rated
	// Earthbound 1
	// Red 5
}
Beispiel #8
0
func (d *dataAccess) GetMetricTagSets(metric string, tags opentsdb.TagSet) (map[string]int64, error) {
	defer collect.StartTimer("redis", opentsdb.TagSet{"op": "GetMetricTagSets"})()
	conn := d.GetConnection()
	defer conn.Close()

	var cursor = "0"
	result := map[string]int64{}

	for {
		vals, err := redis.Values(conn.Do(d.HSCAN(), searchMetricTagSetKey(metric), cursor))
		if err != nil {
			return nil, slog.Wrap(err)
		}
		cursor, err = redis.String(vals[0], nil)
		if err != nil {
			return nil, slog.Wrap(err)
		}
		mtss, err := stringInt64Map(vals[1], nil)
		if err != nil {
			return nil, slog.Wrap(err)
		}
		for mts, t := range mtss {
			ts, err := opentsdb.ParseTags(mts)
			if err != nil {
				return nil, slog.Wrap(err)
			}
			if ts.Subset(tags) {
				result[mts] = t
			}
		}

		if cursor == "" || cursor == "0" {
			break
		}
	}
	return result, nil
}
Beispiel #9
0
// TextExecError tests handling of errors in a transaction. See
// http://redis.io/topics/transactions for information on how Redis handles
// errors in a transaction.
func TestExecError(t *testing.T) {
	c, err := redistest.Dial()
	if err != nil {
		t.Fatalf("error connection to database, %v", err)
	}
	defer c.Close()

	// Execute commands that fail before EXEC is called.

	c.Do("ZADD", "k0", 0, 0)
	c.Send("MULTI")
	c.Send("NOTACOMMAND", "k0", 0, 0)
	c.Send("ZINCRBY", "k0", 0, 0)
	v, err := c.Do("EXEC")
	if err == nil {
		t.Fatalf("EXEC returned values %v, expected error", v)
	}

	// Execute commands that fail after EXEC is called. The first command
	// returns an error.

	c.Do("ZADD", "k1", 0, 0)
	c.Send("MULTI")
	c.Send("HSET", "k1", 0, 0)
	c.Send("ZINCRBY", "k1", 0, 0)
	v, err = c.Do("EXEC")
	if err != nil {
		t.Fatalf("EXEC returned error %v", err)
	}

	vs, err := redis.Values(v, nil)
	if err != nil {
		t.Fatalf("Values(v) returned error %v", err)
	}

	if len(vs) != 2 {
		t.Fatalf("len(vs) == %d, want 2", len(vs))
	}

	if _, ok := vs[0].(error); !ok {
		t.Fatalf("first result is type %T, expected error", vs[0])
	}

	if _, ok := vs[1].([]byte); !ok {
		t.Fatalf("second result is type %T, expected []byte", vs[2])
	}

	// Execute commands that fail after EXEC is called. The second command
	// returns an error.

	c.Do("ZADD", "k2", 0, 0)
	c.Send("MULTI")
	c.Send("ZINCRBY", "k2", 0, 0)
	c.Send("HSET", "k2", 0, 0)
	v, err = c.Do("EXEC")
	if err != nil {
		t.Fatalf("EXEC returned error %v", err)
	}

	vs, err = redis.Values(v, nil)
	if err != nil {
		t.Fatalf("Values(v) returned error %v", err)
	}

	if len(vs) != 2 {
		t.Fatalf("len(vs) == %d, want 2", len(vs))
	}

	if _, ok := vs[0].([]byte); !ok {
		t.Fatalf("first result is type %T, expected []byte", vs[0])
	}

	if _, ok := vs[1].(error); !ok {
		t.Fatalf("second result is type %T, expected error", vs[2])
	}
}
Beispiel #10
0
		ve(redis.Ints(nil, nil)),
		ve([]int(nil), redis.ErrNil),
	},
	{
		"strings([v1, v2])",
		ve(redis.Strings([]interface{}{[]byte("v1"), []byte("v2")}, nil)),
		ve([]string{"v1", "v2"}, nil),
	},
	{
		"strings(nil)",
		ve(redis.Strings(nil, nil)),
		ve([]string(nil), redis.ErrNil),
	},
	{
		"values([v1, v2])",
		ve(redis.Values([]interface{}{[]byte("v1"), []byte("v2")}, nil)),
		ve([]interface{}{[]byte("v1"), []byte("v2")}, nil),
	},
	{
		"values(nil)",
		ve(redis.Values(nil, nil)),
		ve([]interface{}(nil), redis.ErrNil),
	},
	{
		"float64(1.0)",
		ve(redis.Float64([]byte("1.0"), nil)),
		ve(float64(1.0), nil),
	},
	{
		"float64(nil)",
		ve(redis.Float64(nil, nil)),