Question

我想将Vert.x 3.3.2和socketJS与eventbus代理一起使用，忘记了URL的一劳永逸，只是在没有创建REST接口的情况下在消息中进行交谈 - 多年来在Java平台上最好的事情！但是，我的你好世界没有用。

我的测试如下：在每个连接和断开连接的事件客户端和服务器端，它在控制台上打印。并且，当客户端连接时，客户端发送服务器响应的消息，服务器也向每个人发送通知。发生的事情是只有第一个客户端发送其消息并从服务器获得适当的响应。

爪哇：

public class App extends AbstractVerticle {

public static void main(String[] args) throws InterruptedException {
    Vertx.vertx().deployVerticle(MethodHandles.lookup().lookupClass().getName());
}

@Override
public void start() throws IOException {
    Router router = Router.router(vertx);
    BridgeOptions options = new BridgeOptions();
    PermittedOptions address = new PermittedOptions().setAddress("some-address");
    options.addInboundPermitted(address);
    options.addOutboundPermitted(address);
    SockJSHandler sockJSHandler = SockJSHandler.create(vertx).bridge(options, be -> {
        if (be.type() == BridgeEventType.REGISTER) {
            System.out.println("sockJs: connected");
            vertx.eventBus().publish("some-address", "hey all, we have a new subscriber ");
        }
        be.complete(true);
    });
    router.route("/sockjs/*").handler(sockJSHandler);
    router.route("/web/*").handler(StaticHandler.create("doc/clientSocketJS"));
    vertx.createHttpServer().requestHandler(router::accept).listen(8020, listenHandler -> {
        if (listenHandler.failed()) {
            LOGGER.log(Level.SEVERE, "Startup error", listenHandler.cause());
            System.exit(0); // stop on startup error
        }
    });
    vertx.eventBus().consumer("some-address", message -> {
        System.out.println("sockJs: received: " + message.body());
        message.reply("I received so I reply");
    });

    }

}

在文件夹doc / clientSocketJS中有一个index.html：

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script src="http://cdn.jsdelivr.net/sockjs/0.3.4/sockjs.min.js"></script>
<script src="js/vertx-eventbus.js"></script>
<script>
    var eb = new EventBus('http://localhost:8020/sockjs');
    eb.onopen = function() {
        console.log('connected');
        eb.registerHandler('some-address', function(error, message) {
            console.log('received: ' + JSON.stringify(message));
        });
        eb.send('some-address', {
            name : 'from ' + navigator.product
        }, null, function(a, message) {
            if (message == null) {
                console.log("ERROR: response null");
            } else {
            console.log('response: ', message.body);
            }
        });
    }
    eb.onclose = function() {
        console.log("disconnected");
        eb = null;
    };
</script>
</head>
</html>

回复如下：

加载第一个浏览器客户端： SERVER：

sockJs: connected
sockJs: received: hey all, we have a new subscriber 
sockJs: received: {"name":"from Gecko"}

客户1：

connected
response: I received so I reply

这是预期的。然后我加载第二个客户端（相同或其他浏览器）：

SERVER

sockJs: connected
sockJs: received: hey all, we have a new subscriber 
(expecting a 'name' just like first time, but it doesn't appear)

客户2：

connected
(after a while) ERROR: response null  @ index.html::18

怎么了？

Answer 1

你的Java代码似乎完全没问题。但JavaScript代码看起来像是从一个旧例子中获取的 registerHandler回调的第一个参数是消息本身，而不是错误我还使用了托管的VertxEventBus，而不是提供的，以防万一。

这应该有效：

var eb = new vertx.EventBus('http://localhost:8020/sockjs');
        eb.onopen = function() {
            console.log('connected');
            eb.registerHandler('some-address', function(message) {
                console.log('received: ' + JSON.stringify(message));
            });
            eb.send('some-address', {
                name : 'from ' + navigator.product
            }, null, function(a, message) {
                if (message == null) {
                    console.log("ERROR: response null");
                } else {
                    console.log('response: ', message.body);
                }
            });
        };
        eb.onclose = function() {
            console.log("disconnected");
            eb = null;
        };

    <script src="http://cdn.jsdelivr.net/sockjs/0.3.4/sockjs.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/vertx/2.0.0/vertxbus.min.js"></script>

Java Vert.x和SockJS通过Eventbus

1 个答案: