Vertx event bus can not send message to different verticle - event-bus

Question

I am pretty new to Vertx, but I am pretty interested in testing its integration with Spring. I used Spring boot to boost the project, and deployed two verticles. I want them to communicate with each other using event bus, but failed. This is what I did:
In Main application:
#SpringBootApplication
public class MySpringVertxApplication {
#Autowired
MyRestAPIServer myRestAPIServer;
#Autowired
MyRestAPIVerticle MyRestAPIVerticle;
public static void main(String[] args) {
SpringApplication.run(MySpringVertxApplication.class, args);
}
#PostConstruct
public void deployVerticles(){
System.out.println("deploying...");
Vertx.vertx().deployVerticle(MyRestAPIVerticle);
Vertx.vertx().deployVerticle(myRestAPIServer);
}
}
In APIVerticle:
#Component
public class MyRestAPIVerticle extends AbstractVerticle {
public static final String ALL_ACCOUNT_LISTING = "com.example.ALL_ACCOUNT_LISTING";
#Autowired
AccountService accountService;
EventBus eventBus;
#Override
public void start() throws Exception {
super.start();
eventBus = vertx.eventBus();
MessageConsumer<String> consumer = eventBus.consumer(MyRestAPIVerticle.ALL_ACCOUNT_LISTING);
consumer.handler(message -> {
System.out.println("I have received a message: " + message.body());
message.reply("Pretty Good");
});
consumer.completionHandler(res -> {
if (res.succeeded()) {
System.out.println("The handler registration has reached all nodes");
} else {
System.out.println("Registration failed!");
}
});
}
}
Finally ServerVerticle:
#Service
public class MyRestAPIServer extends AbstractVerticle {
HttpServer server;
HttpServerResponse response;
EventBus eventBus;
#Override
public void start() throws Exception {
server = vertx.createHttpServer();
Router router = Router.router(vertx);
eventBus = vertx.eventBus();
router.route("/page1").handler(rc -> {
response = rc.response();
response.setChunked(true);
eventBus.send(MyRestAPIVerticle.ALL_ACCOUNT_LISTING,
"Yay! Someone kicked a ball",
ar->{
if(ar.succeeded()){
System.out.println("Response is :"+ar.result().body());
}
}
);
});
server.requestHandler(router::accept).listen(9999);
}
But after I started it, and visit to /page1, message can not be sent from ServerVerticle to APIVerticle at all. If I move event bus consumer into same verticle as Sender, then event can be received.
Are there anything wrong here in sending message between two verticles? How can I make it work?
Thanks in advance.

Answer 1

You deployed them in separate vertx instance:
Vertx.vertx().deployVerticle(MyRestAPIVerticle);
Vertx.vertx().deployVerticle(myRestAPIServer);
Try this:
Vertx vertx = Vertx.vertx();
vertx.deployVerticle(MyRestAPIVerticle);
vertx.deployVerticle(myRestAPIServer);

Answer 2

Vertx event bus is not shared across different Vertx instances like how you are trying ( But clustered Vert.x applications can do it). In your case change it to use a single Vert.x instance like below in your MySpringVertxApplication.
Vertx vertx = Vertx.vertx();
vertx.deployVerticle(MyRestAPIVerticle.class.getName());
vertx.deployVerticle(MyRestAPIServer.class.getName());