I've been working on an integration of the Restlet Client and Server APIs
with XMPP. I now have a working version (with many caveats).
You can now do post, put, get, or head via XMPP with uris structured as:
xmpp://{sender}/{sender-resource}/{recipient}/{recipient-resource}/{path}
I struggled with how to structure this URI but I think this makes
sense in that an XMPP client is connected to the server associated
with their sender id (e.g. gmail.com for google talk). To get to
the recipient, you need to talk to your XMPP server, via your
resource name. The message is then sent to the recipient's
specific resource. Keep in mind in XMPP that resources are just
you logged into your IM client on different machines.
The server is associated with a specific identity that you pre-establish
when you start your application. In theory, you can have multiple
XMPP+resource pairs running in one process but I haven't tested
that.
Internally, I'm using the smack API for XMPP.
So, sending a message over XMPP is now:
Response response = client.post(
"xmpp://[EMAIL PROTECTED]/chat/[EMAIL PROTECTED]/chat/echo",
new StringRepresentation("Hello World!"],MediaType.TEXT_PLAIN));
and setting up a server is a little more complicated. For example, inside a
component:
XMPP.Identity id =
XMPP.getInstance().addIdentity("[EMAIL PROTECTED]","password");
Protocol xmpp = Protocol.valueOf("xmpp");
getServers().add(xmpp, id.getId(),0);
getClients().add(xmpp);
and now you can attach a restlet that you can talk to over xmpp:
VirtualHost host = new VirtualHost(getContext());
host.attach("/echo",new Restlet() {
public void handle(Request request,Response response) { ... }
});
So far I haven't figured out whether I need to do something special with
the VirtualHost instance. The "server name", address, etc, are rather funny
for XMPP since the connection is actually outward and the host doesn't
actually bind to an address.
I've put in some support for sending "binary types" but I haven't
finished the receiving
part. Right now you can send text/* media types and anything that is
XML (types ending
in "+xml" or any of the XML media types).
You can take a peek at the code at the new xeerkat project:
http://code.google.com/p/xeerkat/
The old project is at java.net:
https://xeerkat.dev.java.net/
My plans are to move the whole API over to the restlet API and
hide all the agent brokering in local services.
--Alex Milowski
