1. ECEG Group

2. iSpace Room Before

3. iSpace Room After

4. Abstract Event Heap Solution: ECEG

5. Video

6. ECEG System Features Resource Discovery

7. ECEG System Features Resource Discovery Generic Application Platform

8. ECEG System Features Resource Discovery Generic Application Platform Remote Control

9. ECEG System Features Resource Discovery Generic Application Platform Remote Control Instant Messenger

10. ECEG System – How to Use

11. ECEG System http://2g1319.ssvl.kth.se/~csd2002- forumispace/download/eceg.htm

12. System Overview Application P2P Communication Discovery JXTA TCP/IP Wave LAN

13. BlueTooth

14. Infrared

15. Wave LAN

16. Transport layer solutions Event Heap Jini Jxta Definition –Transport layer’s responsibility is to define how traffic should be sent over inter- networks

17. Event Heap A centeral event dispatcher, all the message goes through the event heap server.

18. Jini Establishes a distributed system by moving interfaces of objects around the network Looku p Service Looku p Service Provide r Service Provide r Client

19. Jini Looku p Service Looku p Service Provide r Service Provide r Client

20. Jini Looku p Service Looku p Service Provide r Service Provide r Client Service Object Service Attribute

21. Jini Looku p Service Looku p Service Provide r Service Provide r Client

22. Jini Looku p Service Looku p Service Provide r Service Provide r Client

23. Jini Advantages –Simplicity. –Robustness. Disadvantages –Platform dependency. –IP based.

24. JXTA ”A layered model solution for developing Peer 2 Peer applications, consisting of protocols that are independent from underlying topology” -SUN

25. JXTA Peer 2 Peer Dynamic Lightweight

26. Chosen Technology: JXTA Advantages –Interoperability. –Platform Independent. –Ubiquity Disadvantages –Under Development. –Inherently Chatty.

27. ECEG System Application P2P Communication Discovery

28. Source Code public void discoveryEvent(DiscoveryEvent ev) { Debug.trace("-> MyPeerGroupNeigborhood.discoveryEvent", 1); DiscoveryResponseMsg response = ev.getResponse(); int index = -1; Peer peerTemp = null; try { String aResponse = response.getPeerAdv(); /* First we can elicit what peer has published the advert, we can then determine which groups it belongs to */ InputStream is = new ByteArrayInputStream((aResponse).getBytes()); peerAdvert = (PeerAdvertisement)AdvertisementFactory.newAdvertisement( new MimeMediaType("text/xml"), is); Debug.trace("Number of responses received from: " + peerAdvert.getName() + " is " + response.getResponseCount(), 2); index = neighborhoodData.doesPeerExist(peerAdvert.getPeerID()); Debug.trace("Peer Description: " + peerAdvert.getDescription(), 2); Enumeration enum = response.getResponses(); if (index >= 0) // the peer exists { Debug.trace("Peer exists", 1); neighborhoodData.setPeerAliveFlag(peerAdvert.getPeerID()); ParsePeer.parse( (Peer)neighborhoodData.vectorManip.elementAt(index), peerAdvert, enum, this, true); Debug.writePeerHtmlFile(peerAdvert.getName()); ParsePeer.dealWithSubAdvertisements(enum, (Peer)neighborhoodData.vectorManip.elementAt(index), this); Debug.trace("End of peer exists", 1); } else if (index < 0) { Debug.trace("Peer does not exist", 3); peerTemp = new Peer(); neighborhoodData.addPeer(peerTemp); ParsePeer.parse(peerTemp, peerAdvert, enum, this, false); ParsePeer.dealWithSubAdvertisements(enum, peerTemp, this); Debug.trace("End of peer does not exist", 1); discovery.getRemoteAdvertisements (null, DiscoveryService.ADV, null, null, 30, this); discovery.publish(myPeer.pipeAdvertisement, DiscoveryService.ADV); discovery.remotePublish(myPeer.pipeAdvertisement, DiscoveryService.ADV); } catch (IOException ioe) { Debug.error("An IO error occured!!"); Debug.error(ioe.toString()); ioe.printStackTrace(); } catch (Exception e) { e.printStackTrace(); } Debug.trace("<- MyPeerGroupNeigborhood.discoveryEvent", 1); }

29. Project Issues Project Scope Project Plan Adherence Extra Frills: –Mouse Sender/Receiver –Instant Messenger –Dynamic IP Discovery –Inter iSpace Communication

30. Problems Faced Team Member Loss Tomorrow’s Technology Inter-Subnet Peer Groups

31. Conclusion Wave LAN JXTA Layered Model Developed Application Future

32. Acknowledgements Li Wei Erik Eliasson Fredrik Kilander Teaching Team

33. Questions & Answers ?