Cadence API for greetings and execute workflow

Cadence-Greetings-API-V1.go

// GreetUser is used to Welcome a new User into the tavern
func (cc *CadenceClient) GreetUser(w http.ResponseWriter, r *http.Request) {
	// Grab user info from body
	var visitor customer.Customer

	err := json.NewDecoder(r.Body).Decode(&visitor)
	if err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}
	// Trigger Workflow here
	log.Print(visitor)

	// Create workflow options, this is the same as the CLI, a task list, a timeout timer
	opts := client.StartWorkflowOptions{
		TaskList:                     "greetings",
		ExecutionStartToCloseTimeout: time.Second * 10,
	}

	log.Println("Starting workflow")
	// This is how you Execute a Workflow and wait for it to finish
	// This is useful if you have synchronous workflows that you want to leverage as functions
	future, err := cc.client.ExecuteWorkflow(r.Context(), opts, GreetingsWorkflow, visitor)

	if err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}
	log.Println("Get Result from  workflow")
	// Fetch result once done and marshal into
	if err := future.Get(r.Context(), &visitor); err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	data, _ := json.Marshal(visitor)
	w.WriteHeader(http.StatusOK)
	w.Write(data)
}