The JuxtaNet

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The JuxtaNet

• COSC 541
• Data Communication Systems and Network
• Prof. Mort Anvari
• Student Name Wei Chen
• Student ID 106279
• Date 6/05/2001

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The JuxtaNet

• What is JXTA?
• Learning the JXTA Shell
• About the JXTA Java Binding
• XML
• Discussion
• Conclusion

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The JuxtaNet

• The JuxtaNet is a new peer to peer network. It
  is significant in that it is an open,
  general-purpose P2P network. It can
  simultaneously support multiple file-sharing
  systems. It comes with the use of JXTA.

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What is JXTA?

• JXTA, or Juxtapose, is an open source project,
  released on April 25th, 2001.
• It was designed for a multiplicity of purposes.

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There are four mechanisms planned for JXTA

• Being able to pipe from one peer to another
• Being able to group a set of peers together, and
  create groups of groups
• Doing monitoring and metering -- how do we know
  what's going on, how do we institute a policy
  across peers?
• and a security layer.

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Enter JXTA

• JXTA is positioned as a peer-to-peer stack, a
  wafer-thin layer sitting on top of the operating
  system or virtual machine -- and below actual P2P
  services and applications. To visualize this,
  take a look at "The JXTA Layer Cake."

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Architecture

• Hardware
• Operating Environment or Virtual Machine
• JXTA Technology Layer(Peer Groups,Peer Pipes,Peer
  Monitoring).
• Peer Services Layer
• Peer Applications Layer

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Learning the JXTA Shell

• The JXTA shell is a command-line interface to
  Sun's JXTA (pronounced "Juxta") peer-to-peer
  framework. Originally written as a debugging tool
  for developers, the JXTA Shell affords a
  ground-floor view of the JXTA environment, It is
  a fine demonstration of some of the key features
  of the JXTA
• platform.

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Login

• 1, The JXTA Shell is freely downloadable from the
  Jxta.org site at http//download.jxta.org/easyinst
  all/.
• 2, Launch the JXTA shell by double-clicking on
  the jxta.exe icon in the shell subdirectory of
  wherever you put the installation.
• 3,The first time you run the shell, the JXTA
  Configurator dialog will appear. Leave the
  defaults as they are all you need do is fill in
  a name for your peer (anything will do) in the
  Peer Name field and click the OK button to move
  on.
• 4, The JXTA shell window should appear and youre
  ready to go.

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Note

• A couple of bugs can cause the shell not to
  launch. If, after closing the configurator, the
  shell does not appear momentarily, double-click
  the jxta.exe icon to relaunch. Windows 2000 users
  may find this makes no difference and will need
  to log out (not reboot, mind you) and log in
  again before continuing.

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About the JXTA Java Binding

• Sun's preliminary Java binding offers a set of
  Java classes that implement the JXTA protocol and
  hooks into itself via a default set of objects
  and services. The code contains two main
  packages, net.jxta and net.jxta.impl. The former
  encompasses all the JXTA-Java binding interfaces,
  while the latter contains the implementations of
  those interfaces

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XML

• XML is todays metric of basic interoperability,
  it is merely a standard way of specifying
  standards,and JXTA is chock full of it. Every
  peer, group, talk, message, and pipe
  advertisement is an XML document.

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Discussion

• Simplicity
• Openness
• Suns Project JXTA, Microsoft .NET and HailStorm
• P2P and JXTA

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Conclusion

• The core JXTA protocols are the foundation for
  Sun's initial reference implementation, which in
  turn is the basis for Sun's example applications,
  including the Shell and InstantP2P. These
  applications give life to the JuxtaNet as they
  are run and instantiate peers that
  intercommunicate. Now lets go to the JuxtaNet.

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The References

• JXTA Takes Its Position
• JXTA Shell commands
• The JuxtaNet
• "Hello, JXTA!"
• Joy Announces JXTA
• The Trouble with JXTA
• http//openp2p.com/http//openp2p.com/

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Thank Prof. Mort Anvari!