ZeroMQ / JZMQ - 订阅者消息过滤不起作用

Question

消息过滤不起作用 - 无法理解代码有什么问题。这根本不会检索任何消息。但是，如果我使用（“。”。getBytes（）），它工作正常并返回发布的所有msgs。我正在使用JZMQ2.1.3.jar。请建议。谢谢！

public class OMQSubFilter {

    public static void main (String[] args) {

        // Prepare our context and subscriber
        Context context = ZMQ.context(1);
        Socket subscriber = context.socket(ZMQ.SUB);
       // System.out.print("Subscriber started");
        subscriber.connect("tcp://localhost:5556");

     // Subscribe to keywords, default is All
        String twtFilter = (args.length > 0) ? args[0] : "";
        subscriber.subscribe(twtFilter.trim().getBytes());
        System.out.print("Filter: "+ twtFilter.trim());

        while (!Thread.currentThread ().isInterrupted ()) {
           byte[] tweet = subscriber.recv(0);  
           String str = new String(tweet);
            //String str = subscriber.recvStr(0).trim();
            System.out.print(str);
        }
        subscriber.close ();
        context.term ();
    }
}

以下是发布商代码：

public class OMQPub 
{
    public static void main (String[] args) 
    {  
        Context zcontext = ZMQ.context(1);
        Socket pub = zcontext.socket(ZMQ.PUB);
        pub.bind("tcp://*:5556");

        java.util.List<TweetStatus> tweets = ct.getTweets();
        Iterator<TweetStatus> iter = tweets.iterator();
        String tweetStr = "";
          try {  
                Thread.sleep (1000);  
            } catch (InterruptedException e) {  
                e.printStackTrace();  
            }    

        while (iter.hasNext()) {
            TweetStatus tweet = iter.next();
            tweetStr = Utility.jsonFormat(tweet, ct.getKeywords());
            System.out.println(" TweetStr : "+tweetStr);
            pub.send(tweetStr.getBytes(), ZMQ.NOBLOCK); 
        }

        //pub.close();
        //zcontext.term();      //zcontext.term() hangs even all the sockets created in the context are closed.
    }
}