Question

我有一个发送者和消费者交换消息：

public class Sender extends AbstractVerticle {
@Override
public void start() {
    EventBus eventBus = vertx.eventBus();
    eventBus.send(Constants.ADDRESS, "Hello from sender", res -> {
        if (res.succeeded()) {
            System.out.println("Successfully sent reply");
        } else {
            System.out.println("Failed to send reply." + res.cause());
        }
    });
    eventBus.consumer(Constants.ADDRESS, msg -> System.out.println("received msg from consumer:" + msg.body()));
}

public class Consumer extends AbstractVerticle{
protected EventBus eventBus = null;

@Override
public void start() {
    eventBus = vertx.eventBus();

    eventBus.consumer(Constants.ADDRESS, msg -> msg.reply("Hi from consumer.", res -> {
        if (res.succeeded()) {
            System.out.println("Successfully sent reply");
        } else {
            System.out.println("Failed to send reply." + res.cause());
        }
    }));
}

}

我希望当消费者回复邮件时，发件人会收到邮件。但是，我得到了超时：

Successfully sent reply

Failed to send reply.(TIMEOUT,-1) Timed out after waiting 30000(ms) for a reply. address: 2, repliedAddress: 1

部署：

public class ServiceLauncher { 

private static Vertx vertx = Vertx.vertx();

public static void main(String[] args) {
    vertx.deployVerticle(new Consumer(), res -> {
        if (res.succeeded()) {
            System.out.println("Verticle " + Consumer.NAME + " deployed.");
            vertx.deployVerticle(new Sender());
            System.out.println("Verticle " + Sender.NAME + " deployed.");
        } else {
            System.out.println("Verticle " + Consumer.NAME + " not deployed.");
        }
    });
}

我做错了什么？ Thanx提前

更新：问题在于msg.reply（） - 消费者没有回复消息，但我仍然无法找出原因。

Answer 1

超时不在请求的发件人中，而是在其收件人中。 msg.reply()中定义的处理程序会等待发件人的下一次回复。它是不处理程序，只确认发送状态。 <{1}}的{{1}}中的处理程序也会在发件人收到回复时触发。

只需删除Sender中的处理程序，然后以同样的方式修改eventBus.send()中的处理程序msg.reply()：

eventBus.send()

和

Sender

执行完毕后你会看到：

public class Sender extends AbstractVerticle {
    public static final String NAME = "SENDER";

    @Override
    public void start() {
        EventBus eventBus = vertx.eventBus();
        eventBus.send(Constants.ADDRESS, "Hello from sender", res -> {
            if (res.succeeded()) {
                System.out.println("Successfully received reply: " + res.result().body());
            } else {
                System.out.println("Failed to send reply." + res.cause());
            }
        });

    }
}

Answer 2

我有一个类似的问题。就我而言，我正在发送非JsonObject答复。该消息必须使用有效的JsonObject进行回复，而不是JsonArray或其他任何东西。尽管文档没有提到JsonObject，但这看起来是默认行为。但是，原始代码段中的真正问题是您为回复的回复指定了处理程序。使用者已成功回复，但使用者未收到发件人的回复。请参阅下面的评论。

@Override
public void start() {
    eventBus = vertx.eventBus();

    eventBus.consumer(Constants.ADDRESS, msg -> msg.reply("Hi from consumer.", res -> {
        if (res.succeeded()) { //this is expecting a response from Sender which never does so this will never execute.
            System.out.println("Successfully sent reply");
        } else { //it's not failing either so this will not execute either
            System.out.println("Failed to send reply." + res.cause());
        }
    }));
}

Vertx：邮件回复超时

2 个答案: