Remote system event Notification Library
<p>Hi I am looking for some sort of library that will allow:
- multiple remote applications to register with the system on which events it is interested in
- When this event occurs, the system will sent out notification to these remote applications regarding this event
- Objects, or hash tables information should be able to be exchanged as well between the system and the remote application</p>

<p>The system will be implemented in either Python, or Java, and it will serve as a middleware between a database and external applications. I am not sure if such a library exists, or if it will most suited to implement this as message exchanges. I have heard of twisted, pyro, but not sure of the extent of their capabilities. I had used RPyC previously, but it don't seem to fit the picture naturally. If someone can also point out what is available on the java side as well, I would really appreciated.</p>

<p>Plz advise, thnx!</p>
