Example #1
0
/*
 * Poll the worker's job queue
 * jobHandlers - a reference to the clients map of available job handlers
 */
func (this Worker) Poll(jobHandlers map[string]reflect.Type) {
	for {
		// Pop a job off the queue
		var client redis.Client
		_, message, err := client.Blpop([]string{this.Queue}, 1)

		if err != nil {
			fmt.Println(fmt.Sprintf("ERROR: %s\n", err))
		} else if len(message) > 0 {
			// Basic debugging information
			// fmt.Println(this.Name + ": Yay Work Work Work!")
			// fmt.Println(string(message))

			// Parse the message
			name, params, err := this.parseMessage(message)

			if err != nil {
				fmt.Println(fmt.Sprintf("ERROR: %s\n", err))
			} else {
				// Construct the handler and call the execute() function
				jobHandler := reflect.New(jobHandlers[name])
				executeMethod := jobHandler.MethodByName("Execute")
				if executeMethod.IsValid() {
					executeMethod.Call([]reflect.Value{0: reflect.ValueOf(params)})
				} else {
					fmt.Println(fmt.Sprintf("ERROR: Invalid job handler"))
				}
			}
		} else {
			// fmt.Println(this.Name + ": Nothing to do :(\n")
		}

		// Sleep for 2 seconds before polling the queue again
		time.Sleep(2 * time.Second)
	}
}