ctrl/publisher-services.go

package steward

import (
	"fmt"
	"time"
)

type publisherServices struct {
	sayHelloPublisher sayHelloPublisher
}

func newPublisherServices(sayHelloInterval int) *publisherServices {
	ps := publisherServices{
		sayHelloPublisher: sayHelloPublisher{
			interval: sayHelloInterval,
		},
	}
	return &ps
}

// ---

type sayHelloPublisher struct {
	interval int
}

func (s *sayHelloPublisher) start(newMessagesCh chan<- []subjectAndMessage, fromNode node) {
	go func() {
		for {
			sam := s.createMsg(fromNode)
			newMessagesCh <- []subjectAndMessage{sam}
			time.Sleep(time.Second * time.Duration(s.interval))
		}
	}()
}

// Will prepare a subject and message with the content
// of the error
func (s *sayHelloPublisher) createMsg(FromNode node) subjectAndMessage {
	// TESTING: Creating an error message to send to errorCentral
	m := fmt.Sprintf("Hello from %v\n", FromNode)

	sam := subjectAndMessage{
		Subject: Subject{
			ToNode:         "central",
			CommandOrEvent: EventNACK,
			Method:         SayHello,
		},
		Message: Message{
			ToNode:   "central",
			FromNode: FromNode,
			Data:     []string{m},
			Method:   SayHello,
		},
	}

	return sam
}