Exemplo n.º 1
0
func init() {
	// Parse the flags
	flag.Parse()

	cnf = config.Config{
		Broker:        *broker,
		ResultBackend: *resultBackend,
		Exchange:      *exchange,
		ExchangeType:  *exchangeType,
		DefaultQueue:  *defaultQueue,
		BindingKey:    *bindingKey,
	}

	// Parse the config
	// NOTE: If a config file is present, it has priority over flags
	data, err := config.ReadFromFile(*configPath)
	if err == nil {
		err = config.ParseYAMLConfig(&data, &cnf)
		errors.Fail(err, "Could not parse config file")
	}

	server, err := machinery.NewServer(&cnf)
	errors.Fail(err, "Could not initialize server")

	// Register tasks
	tasks := map[string]interface{}{
		"add":      exampletasks.Add,
		"multiply": exampletasks.Multiply,
	}
	server.RegisterTasks(tasks)

	// The second argument is a consumer tag
	// Ideally, each worker should have a unique tag (worker1, worker2 etc)
	worker = server.NewWorker("machinery_worker")
}
Exemplo n.º 2
0
func _setup(brokerURL, backend string) *machinery.Server {
	cnf := config.Config{
		Broker:        brokerURL,
		ResultBackend: backend,
		Exchange:      "test_exchange",
		ExchangeType:  "direct",
		DefaultQueue:  "test_queue",
		BindingKey:    "test_task",
	}

	server, err := machinery.NewServer(&cnf)
	errors.Fail(err, "Could not initialize server")

	tasks := map[string]interface{}{
		"add": func(args ...int64) (int64, error) {
			sum := int64(0)
			for _, arg := range args {
				sum += arg
			}
			return sum, nil
		},
		"multiply": func(args ...int64) (int64, error) {
			sum := int64(1)
			for _, arg := range args {
				sum *= arg
			}
			return sum, nil
		},
	}
	server.RegisterTasks(tasks)

	return server
}
Exemplo n.º 3
0
func init() {
	// Parse the flags
	flag.Parse()

	cnf = config.Config{
		Broker:        *broker,
		ResultBackend: *resultBackend,
		Exchange:      *exchange,
		ExchangeType:  *exchangeType,
		DefaultQueue:  *defaultQueue,
		BindingKey:    *bindingKey,
	}

	// Parse the config
	// NOTE: If a config file is present, it has priority over flags
	data, err := config.ReadFromFile(*configPath)
	if err == nil {
		err = config.ParseYAMLConfig(&data, &cnf)
		errors.Fail(err, "Could not parse config file")
	}

	server, err = machinery.NewServer(&cnf)
	errors.Fail(err, "Could not initialize server")
}
Exemplo n.º 4
0
func main() {
	/*
	 * First, let's try sending a single task
	 */
	initTasks()
	fmt.Println("Single task:")

	asyncResult, err := server.SendTask(&task0)
	errors.Fail(err, "Could not send task")

	result, err := asyncResult.Get()
	errors.Fail(err, "Getting task state failed with error")
	fmt.Printf("1 + 1 = %v\n", result.Interface())

	/*
	 * Now let's explore ways of sending multiple tasks
	 */

	// Now let's try a parallel execution
	initTasks()
	fmt.Println("Group of tasks (parallel execution):")

	group := machinery.NewGroup(&task0, &task1, &task2)
	asyncResults, err := server.SendGroup(group)
	errors.Fail(err, "Could not send group")

	for _, asyncResult := range asyncResults {
		result, err = asyncResult.Get()
		errors.Fail(err, "Getting task state failed with error")
		fmt.Printf(
			"%v + %v = %v\n",
			asyncResult.Signature.Args[0].Value,
			asyncResult.Signature.Args[1].Value,
			result.Interface(),
		)
	}

	// Now let's try a group with a chord
	initTasks()
	fmt.Println("Group of tasks with a callback (chord):")

	group = machinery.NewGroup(&task0, &task1, &task2)
	chord := machinery.NewChord(group, &task4)
	chordAsyncResult, err := server.SendChord(chord)
	errors.Fail(err, "Could not send chord")

	result, err = chordAsyncResult.Get()
	errors.Fail(err, "Getting task state failed with error")
	fmt.Printf("(1 + 1) * (2 + 2) * (5 + 6) = %v\n", result.Interface())

	// Now let's try chaining task results
	initTasks()
	fmt.Println("Chain of tasks:")

	chain := machinery.NewChain(&task0, &task1, &task2, &task3)
	chainAsyncResult, err := server.SendChain(chain)
	errors.Fail(err, "Could not send chain")

	result, err = chainAsyncResult.Get()
	errors.Fail(err, "Getting chain result failed with error")
	fmt.Printf("(((1 + 1) + (2 + 2)) + (5 + 6)) * 4 = %v\n", result.Interface())
}
Exemplo n.º 5
0
func main() {
	err := worker.Launch()
	errors.Fail(err, "Could not launch worker")
}