Vertx instance variable is null in Spring context - spring

Question

I defined a Spring Boot App as a Verticle as follows:
#SpringBootApplication
public class SpringAppVerticle extends AbstractVerticle {
private Vertx myVertx;
#Override
public void start() {
SpringApplication.run(SpringAppVerticle.class);
System.out.println("SpringAppVerticle started!");
this.myVertx = vertx;
}
#RestController
#RequestMapping(value = "/api/hello")
public class RequestController {
#RequestMapping(method = RequestMethod.GET, produces = "application/json")
public void getEcho() {
JsonObject message = new JsonObject()
.put("text", "Hello world!");
myVertx.eventBus().send(EchoServiceVerticle.ADDRESS, message, reply -> {
JsonObject replyBody = (JsonObject) reply.result().body();
System.out.println(replyBody.encodePrettily());
});
}
}
}
I have a second non-Spring Verticle that is basically a echo service:
public class EchoServiceVerticle extends AbstractVerticle {
public static final String ADDRESS = "echo-service";
#Override
public void start() {
System.out.println("EchoServiceVerticle started!");
vertx.eventBus().consumer(EchoServiceVerticle.ADDRESS, message -> {
System.out.println("message received");
JsonObject messageBody = (JsonObject) message.body();
messageBody.put("passedThrough", "echo-service");
message.reply(messageBody);
});
}
}
The problem is that I get a nullpointer at line myVertx.eventbus().send in SpringAppVerticle class as the myVertx variable is null.
How do I properly instantiate a Vertx variable in a Spring context in order that I can exchange message between my both verticles?
My project can be found here: https://github.com/r-winkler/vertx-spring

Answer 1

The reason of the exception is the following:
SpringAppVerticle bean that is created during spring init is another object than starts the spring boot application. So you have two objects, one that has start() method invoked and another one that doesn't. Second one actually handles requests. So what you need is to register verticles as spring beans.
For samples of vertx/spring interoperability please refer to vertx examples repo.
P.S. I've created a pull request to your repo to make your example work.