android - 如何在 ZeroMQ(jzmq) 3.xx 中使用 XPUB 和 XSUB 实现带有代理的发布-订阅网络

Question

我正在尝试使用下图中提供的 XPUB 和 XSUB 来实现。我已经完成了他们提供的示例，但无法获得 Java 中的 XPUB 和 XSUB。 Here他们在 C 中给出了一个示例，这个示例有点复杂，因为我是 ZeroMQ 的新手。

我正在尝试使用 jni wrapped version 在 android 中使用它.请帮我找一个例子，如何使用 java 在 ZeroMQ 中实现这个带有代理的 Pub-Sub 网络。

目前我指的是http://zguide.zeromq.org/page:all

我试过如下移植它。订阅者.java

public class Subscriber extends Thread implements Runnable {
private static final String TAG = "Subscriber";
private Context ctx;

public Subscriber(ZMQ.Context z_context) {
    this.ctx = z_context;
}

@Override
public void run() {

    super.run();

    ZMQ.Socket mulServiceSubscriber = ctx.socket(ZMQ.SUB);
    mulServiceSubscriber.connect("tcp://localhost:6001");
    mulServiceSubscriber.subscribe("A".getBytes());
    mulServiceSubscriber.subscribe("B".getBytes()); 


        while (true) {
            Log.d(TAG, "Subscriber loop started..");
            String content = new String(mulServiceSubscriber.recv(0));
            Log.d(TAG, "Subscriber Received : "+content);
        }
}

Publisher.java

public class Publisher extends Thread implements Runnable {
private static final String TAG = "Publisher";
private Context ctx;

public Publisher(ZMQ.Context z_context) {
    this.ctx = z_context;
}

@Override
public void run() {

    super.run();

    ZMQ.Socket publisher = ctx.socket(ZMQ.PUB);
    publisher.connect("tcp://localhost:6000");

    while (true) {
        Log.d(TAG, "Publisher loop started..");
        publisher.send(("A Hello " + new Random(100).nextInt()).getBytes() , 0);
        try {
            Thread.sleep(1000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
}

XListener.java(现在是一个简单的 Forwarder)

public class XListener extends Thread implements Runnable {
private static final String TAG = null;
private Socket publisherX;
private Context ctx;
private Socket subscriberX;

public XListener(ZMQ.Context ctx, ZMQ.Socket subscriberX,
        ZMQ.Socket publisherX) {
    this.ctx = ctx;
    this.subscriberX = subscriberX;
    this.publisherX = publisherX;

}

@Override
public void run() {
    super.run();
    while (true) {          
        Log.d(TAG, "XListener loop started..");

        String msg = new String(subscriberX.recvStr());
        Log.v(TAG, "Listener Received: " +"MSG :"+msg);
        publisherX.send(msg.getBytes(), 0);         
    }
}

在应用ma​​in()

private void main() {        ZMQ.Context ctx = ZMQ.context(1);   
    ZMQ.Socket subscriberX = ctx.socket(ZMQ.XSUB);
    subscriberX.bind("tcp://*:6000");
    try {
        Thread.sleep(500);
    } catch (InterruptedException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    ZMQ.Socket publisherX = ctx.socket(ZMQ.XPUB);
    publisherX.bind("tcp://*:6001");
    try {
        Thread.sleep(500);
    } catch (InterruptedException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

    new XListener(ctx, subscriberX, publisherX).start();
    try {
        Thread.sleep(500);
    } catch (InterruptedException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

   new XSender(ctx, subscriberX, publisherX).start();
    try {
        Thread.sleep(500);
    } catch (InterruptedException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    new Subscriber(ctx).start();
    new Publisher(ctx).start();
}

使用代码我无法收听 XSUB。在移植 espresso.c 时，我无法在 ZMQ 的 java 绑定(bind)中找到任何包装器。如何实现一个简单的代理或者我错过了什么？？

Answer 1

哇，我在回答我自己的问题。我错过了将转发器从 publisherX 添加到 subscriberX。这是缺少的代码。现在 XSUB 和 XPUB 可以发送和获取数据了。

public class XSender extends Thread implements Runnable {
private static final String TAG = null;
private Socket publisherX;
private Context ctx;
private Socket subscriberX;

public XSender(ZMQ.Context ctx, ZMQ.Socket subscriberX,
        ZMQ.Socket publisherX) {
    this.ctx = ctx;
    this.subscriberX = subscriberX;
    this.publisherX = publisherX;

}

@Override
public void run() {
    super.run();
    while (true) {
        // Read envelope with address
        Log.d(TAG, "XListener loop started..");

        String msg = new String(subscriberX.recv(0));
        Log.v(TAG, "Listener Received: " +"MSG :"+msg);
        publisherX.send(msg.getBytes(), 0);         

    }


}