| 11 | ) |
| 12 | |
| 13 | func Example() { |
| 14 | // Connect to redis. |
| 15 | client := redis.NewClient(&redis.Options{ |
| 16 | Network: "tcp", |
| 17 | Addr: "127.0.0.1:6379", |
| 18 | }) |
| 19 | defer client.Close() |
| 20 | |
| 21 | // Create a new lock client. |
| 22 | locker := redislock.New(client) |
| 23 | |
| 24 | ctx := context.Background() |
| 25 | |
| 26 | // Try to obtain lock. |
| 27 | lock, err := locker.Obtain(ctx, "my-key", 100*time.Millisecond, nil) |
| 28 | if err == redislock.ErrNotObtained { |
| 29 | fmt.Println("Could not obtain lock!") |
| 30 | return |
| 31 | } else if err != nil { |
| 32 | log.Fatalln(err) |
| 33 | return |
| 34 | } |
| 35 | |
| 36 | // Don't forget to defer Release. |
| 37 | defer lock.Release(ctx) |
| 38 | fmt.Println("I have a lock!") |
| 39 | |
| 40 | // Sleep and check the remaining TTL. |
| 41 | time.Sleep(50 * time.Millisecond) |
| 42 | if ttl, err := lock.TTL(ctx); err != nil { |
| 43 | log.Fatalln(err) |
| 44 | } else if ttl > 0 { |
| 45 | fmt.Println("Yay, I still have my lock!") |
| 46 | } |
| 47 | |
| 48 | // Extend my lock. |
| 49 | if err := lock.Refresh(ctx, 100*time.Millisecond, nil); err != nil { |
| 50 | log.Fatalln(err) |
| 51 | } |
| 52 | |
| 53 | // Sleep a little longer, then check. |
| 54 | time.Sleep(100 * time.Millisecond) |
| 55 | if ttl, err := lock.TTL(ctx); err != nil { |
| 56 | log.Fatalln(err) |
| 57 | } else if ttl == 0 { |
| 58 | fmt.Println("Now, my lock has expired!") |
| 59 | } |
| 60 | |
| 61 | // Output: |
| 62 | // I have a lock! |
| 63 | // Yay, I still have my lock! |
| 64 | // Now, my lock has expired! |
| 65 | } |
| 66 | |
| 67 | func ExampleClient_Obtain_retry() { |
| 68 | client := redis.NewClient(&redis.Options{Network: "tcp", Addr: "127.0.0.1:6379"}) |