Deployment.java

vertx.deployVerticle("org.enterpriseintegration.MTWorker",
	// Instantiate a DeploymentOptions by setting an explicit number
	// of instances and enabling worker code, multiThreaded mode but
	// without having to set the number of instances
	new DeploymentOptions().setWorker(true).setMultiThreaded(true), res -> {
		if (res.succeeded()) {
			System.out.println("Multi-threaded Worker verticle deployed");

			// Send messages on the event bus
			EventBus eventBus = vertx.eventBus();
			eventBus.publish("event", "event01");
			eventBus.send("event", "event02");
			eventBus.send("event", "event03");

		} else {
			System.out.println("Error while deploying a verticle: " + res.cause().getMessage());
		}
	}
);