Java P2P - what options are there?

Question

I'm looking to write a decentralised application that would run over some kind of peer to peer framework. I have fairly limited requirements:

• search for peers offering a particular service
• advertise services
• connect directly to other nodes
• operate across NATs (so support relay and rendevous)

I know about JXTA, but what other options are there? JXTA seems like a bit of a nightmare to implement - is there anything else that maybe offers a less complete protocol stack in exchange for simplicity and ease of deployment?

Thanks

Answer 1

Sounds like something XMPP (Jabber) could solve. Its not true P2P (it has servers), but the servers are inter-linked and mature.