Project JXTA

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Project JXTA

• By Jude Mercado

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Background

• Project JXTA started as a research project at Sun
  Microsystems, Inc. under the guidance of Bill Joy
  and Mike Clary
• Released to the community in April 2001
• It is currently an ongoing open-source project to
  develop ad hoc, peer-to-peer computing

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Project Goals

• Standardize a common set of protocols for
  building p2p applications
• Peer Discovery Protocol
• Peer Resolver Protocol
• Peer Membership Protocol
• Pipe Binding Protocol
• Endpoint Routing Protocol
• Peer Information Protocol

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Project Goals (Contd.)

• Create platform independent applications
• Interoperability

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JXTA Platform

• insert picture

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JXTA Components

• Peers
• Pipes
• Services
• Peer Groups

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1. PEERS

• Fundamental entities in a JXTA system
• Represented by unique Peer ID
• Can be associated with one or more physical
  networking endpoints
• TCP IP address plus port number
• HTTP -- URL
• Wireless packet network cell phone

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2. PIPES

• Provide communication channels for JXTA peers
• Input
• Output
• Dynamic
• Not bound to a physical endpoint until just
  before communications occur

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3. SERVICES

• Hosted by a peer
• Performs useful work on behalf of a remote peer
• Resembles client-server relationship

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4. PEER GROUPS

• A security domain within which membership can be
  authenticated and managed
• Group with shared common services
• All peers belong to a default group
• world peer group

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Platform Core Services

1. Discovery
2. Pipe
3. Resolver
4. Membership/Access
5. Monitor

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1. Discovery Service

• Allows peers to discover each other
• Also used to discover peer groups, services,
  pipes
• Discovery is performed via query for specific
  advertisements

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2. Pipe Service

• Enables peers to bind to pipe endpoints
• Manages pipes created by a peer
• Facilitates passing of messages through pipes

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3. Resolver Service

• Provides a propagation service to query requests
  within a peer group

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4. Membership/Access Service

• Security service
• Can be used to control access to any service or
  resource

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Monitor Service

• Allows for a peer to be monitored for uptime,
  traffic on each incoming and outgoing channel,
  and other information related to status

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JXTA Virtual Network

• insert picture

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References

• jxta.org
• java.sun.com
• JXTA Peer-to-Peer Computing with Java
• By Sing Li