Subscribe to JBoss MQ Topic from .NET client?

[mikehaberfield]

Apologies if this should be in the JBoss.NET forum - but it's related to JBoss MQ pub/sub and .NET client...

Could someone please clarify whether or not it is possible for a .NET client application (e.g. VB.NET, C#.NET etc.) to subscribe to a JBoss MQ
publish/subscribe topic.

I have a (fully working) Java application publishing messages (asynchronously) to a JBoss MQ topic and want to read them with a .NET client.

Any pointers would be greatly appreciated.

Many thanks,

Mike

[genman]

I have posted about this before. I can't seem to find it.

Anyway, if you're just reading messages, what would be easiest would be to write a simple server in Java listening to some well-known port. (Write this as a JMX service.) Then, when a client connects, you read messages from the queue and write them to the socket.

Sort of like this

javax.jms.Connection c = ...;
ServerSocket ss = new ServerSocket(1234);
while (true) {
Socket s = ss.accept();
QueueSession qs = c.createQueueSession();
new Thread(new Sender(s)).start();
}

class Sender implements Runnable {
public void run() {
QueueReader qr = qs.getQueueReader();
while (true) {
Message m = qr.read();
s.getOutputStream().write( m );
}
}
}

If you need to get more sophisicated, you can probably write a .NET client that "talks" over the UIL2 protocol.

(BTW, replace Queue with Topic if you're dealing with topics.)

[genman]

Somebody already wrote a basic .NET client, I don't know if it works well or not.

http://sourceforge.net/projects/csil

It appears to use some sort of XML protocol, which has its associated overhead.

[fawce]

The csil client works well for subscribing to topics. The version in cvs right now can process messages quite rapidly, despite the overhead of encoding the jms messages into xml.

[mikehaberfield]

I've implemented the soultion proposed in the first reply (simple Java<-->.NET bridge written in Java, using a socket to communicate with .NET client) and it'll do me fine for the moment.

(Wouldn't it be nice if Mr Gates provided a fully compliant JMS library in .NET - it would just make everyone's lives so much simpler!)

Many thanks to all those who responded.