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PDF Ebook Mastering JXTA : Building Java Peer-to-Peer Applications

Submitted by antoq on Sat, 07/18/2009 - 02:22

Many of us tend to think of the Internet, and most other networks, as inherently client-server systems. Web developers spend a lot of time building powerful sites that serve information and services to the thousands of browser clients that visit them. But peer-to-peer (P2P) applications like KaZaA, Napster, and SETI have demonstrated the true power of the Internet: the millions of information stores—common PCs—sitting idle on desks around the world. Peer-to-peer technologies harness the CPUs and storage devices of these PCs to produce huge data stores, communications systems, and processing engines.

Due to a lack of standards and toolkits, early P2P application developers spent much of their time reinventing the wheel building the same system “plumbing” for each new app they wrote. Developers at Sun created the JXTA specification to solve this problem. The specification is a basic building block from which developers can produce applications that.

  • Allow sharing of resources between peers without a central server
  • Use idle cycles of desktop machines for solving complex problems
  • Expose Web services to be used by other peers

Content
Chapter 8
Peer Information Protocol

    An Overview of the PIP
    PIP Query Messages
    PIP Response Messages
    Java Binding of the PIP
    Requesting Peer Information
    Building a Listener
    Viewing the Information Returned
    Summary

Chapter 9
Peer Endpoint Protocol

    An Overview of the Peer Endpoint Protocol
    Endpoint Service
    Sending a Message
    Endpoint Protocols
    Java Binding of the Peer Endpoint Protocol
    Summary

Chapter 10
Pipe Binding Protocol

    Overview of the Pipe Binding Protocol
    Pipe Advertisements
    Pipe Binding Query Messages
    Java Binding
    Creating a Pipe
    Receiving Information
    Building the Pipe
    Advertising the Pipe
    Discovering an Input Pipe
    Summary

Chapter 11
Rendezvous Protocol

    Rendezvous Advertisements
    Message Propagation
    The Java Binding
    Dynamic Rendezvous Service Implementation
    Finding Rendezvous Peers Dynamically
    Connecting to Rendezvous Peers
    Disconnecting from a Rendezvous Peer
    Summary

Chapter 12
Developing a JXTA Application

    The Basic Structure for JXTA Applications
    Connecting to the JXTA Network
    Viewing Peer Group Information
    Viewing Peer Group Advertisement
    Building a Peer to Offer Services
    Obtaining Group Services
    Building and Publishing the Module Class Advertisement
    Building the Pipe Advertisement
    Building and Publishing the Module Specification Advertisement
    Waiting for Messages
    Putting It All Together
    Building a Peer for Using Services
    Code for the Receiver Peer
    Getting Services
    Finding the Advertisement through Discovery
    Building an Output Pipe
    Sending a Message through a Pipe
    Application Basics
    Creating a New Peer Group
    Creating a Peer Group ID
    Creating a Module Implementation Advertisement
    Creating a Group Advertisement
    Creating a New Peer Group
    A Peer that Discovers and Joins a New Peer Group
    Creating a Secure Peer Group
    Using a Membership Service Implementation
    Changing the Default Class Implementation Advertisement
    Code for a Secure Peer Group
    A Secure Peer Group Advertisement
    Becoming Authenticated
    New Class Implementation Advertisement Details
    Peer Group Advertisement Details
    authenticateMe() Method Details
    Client for the Secure Peer Group
    Summary

Chapter 13
JXTA Pipes

    Publishing and Discovering Pipes
    Publishing
    Discovery
    Unicast Pipes
    Unicast Pipes on a Local Peer
    Remote Peers
    UnicastSecure Pipes
    Propagate Pipes
    Bidirectional Pipes
    The Bidirectional Pipe Code
    The Bidirectional Pipe Discovery Code
    Reliable Pipes
    Sender Code
    The Receiver Code
    Summary

Part III JXTA Implementation
Chapter 14

    Content Sharing and the Content Management Service (CMS) 243
    Overview of the CMS
    Implementing the CMS in Peers
    Initializing the CMS
    Sharing Content
    Viewing the Shared Content List
    Searching For and Getting Content
    Summary

Chapter 15

    Implementing Security
    JXTA Security Toolkit
    Building Keys
    Secure Membership Service
    Building a New Membership Service
    Changing the Peer Group Creator Code
    Secure Transport
    JxtaUnicastSecure Pipes
    Separately Encrypted Data
    Summary

Chapter 16

    Peer Monitoring and Metering
    Finding Peers in a Group
    Building the Peer Discovery Listener
    Interpreting Events
    The Discovery Code
    Local Peers versus Remote Peers
    Obtaining Information about a Peer
    A Sample Application for Discovering Peers
    Explaining the Code
    Code Output
    Summary

Chapter 17

    Configuring NAT and Firewall Peers
    The JXTA Network Topology
    Running a Peer Behind a Firewall/NAT
    Communication Peer Configuration
    Gateway Configuration
    The Discovery Peer Configuration
    Using the Configurator’s Debug Option
    Building a Router/Rendezvous Peer
    Summary

Chapter 18

    Using Endpoints for Low-Level Communication
    The Endpoint Service
    Code for the Endpoint Receiving Peer
    Code for the Endpoint Sending Peer
    Summary

Chapter 19

    Building a Generic Framework for Distributed Computing
    Master Code
    Worker Code
    Setup
    Work
    Computational Code
    Summary

Chapter 20

    Building an Encrypted, Highly Available Storage System
    System Architecture
    Our Example
    Database Schema
    Message Schema
    Executing the System
    DatabasePeer
    DatabasePeer Connectivity
    Setup
    Publishing a Data Input Pipe
    Publishing a Query Bidirectional Pipe
    Processing Input
    BusinessPeer
    Setup
    Discovery
    Processing Input
    GatheringPeers
    ClientPeer
    Setup
    Pipe Discovery
    The Query Request
    The Image Request
    Summary

Part IV JXTA Reference
Appendix A
Installing JXTA and Compiling JXTA Applications

    Installing JXTA
    Easy Install
    Installing on a Windows System
    Installing on a Linux System
    JXTA Libraries
    Stable Builds
    Daily Builds
    Compiling the Examples
    Windows
    Linux
    Running the Examples
    Windows
    Linux
    JBuilder Compiling and Execution
    Adding a New JBuilder Project

Appendix B
JXTA API

    Class Advertisement
    Field Summary
    Constructor Summary
    Method Summary
    Example
    Class AdvertisementFactory
    Method Summary
    Class AuthenticationCredential
    Constructor Summary
    Method Summary
    Example
    Class Codat
    Field Summary
    Constructor Summary
    Method Summary
    Example
    Class CodatID
    Constructor Summary
    Method Summary
    Example
    Interface Credential
    Method Summary
    Class DiscoveryEvent
    Constructor Summary
    Method Summary
    Example
    Interface DiscoveryListener
    Method Summary
    Example
    Class DiscoveryQueryMsg
    Field Summary
    Constructor Summary
    Method Summary
    Class DiscoveryResponseMsg
    Field Summary
    Constructor Summary
    Method Summary
    Example
    Interface DiscoveryService
    Field Summary
    Method Summary
    Example
    Interface Document
    Method Summary
    Example
    Interface Element
    Method Summary
    Example
    Interface EndpointAddress
    Method Summary
    Example
    Class EndpointAdvertisement
    Constructor Summary
    Method Summary
    Interface EndpointFilterListener
    Method Summary
    Interface EndpointProtocol
    Method Summary
    Example
    Interface EndpointService
    Method Summary
    Example
    Interface GenericResolver
    Method Summary
    Class ID
    Field Summary
    Constructor Summary
    Method Summary
    Class IDFactory
    Method Summary
    Example
    Interface InputPipe
    Method Summary
    Example
    Class JxtaError
    Field Summary
    Constructor Summary
    Method Summary
    Class MembershipService
    Constructor Summary
    Method Summary
    Example
    Interface Message
    Method Summary
    Example
    Class MessageElement
    Constructor Summary
    Method Summary
    Example
    Class MimeMediaType
    Constructor Summary
    Method Summary
    Example
    Class ModuleClassAdvertisement
    Constructor Summary
    Method Summary
    Example
    Class ModuleClassID
    Constructor Summary
    Method Summary
    Class ModuleImplAdvertisment
    Constructor Summary
    Method Summary
    Example
    Class ModuleSpecAdvertisement
    Constructor Summary
    Method Summary
    Example
    Class ModuleSpecID
    Constructor Summary
    Method Summary
    Example
    Interface OutputPipe
    Method Summary
    Example
    Class PeerAdvertisement
    Constructor Summary
    Method Summary
    Example
    Interface PeerGroup
    Constructor Summary
    Method Summary
    Example
    Class PeerGroupAdvertisement
    Constructor Summary
    Method Summary
    Example
    Class PeerGroupFactory
    Constructor Summary
    Method Summary
    Example
    Class PeerGroupID
    Field Summary
    Constructor Summary
    Example
    Class PeerID
    Constructor Summary
    Method Summary
    Example
    Class PeerInfoEvent
    Constructor Summary
    Method Summary
    Example
    Interface PeerInfoListener
    Method Summary
    Class PeerInfoQueryMessage
    Constructor Summary
    Method Summary
    Example
    Class PeerInfoResponseMessage
    Constructor Summary
    Method Summary
    Class PipeAdvertisement
    Field Summary
    Constructor Summary
    Method Summary
    Example
    Class PipeID
    Constructor Summary
    Method Summary
    Example
    Class PipeMsgEvent
    Constructor Summary
    Method Summary
    Example
    Interface PipeMsgListener
    Example
    Interface PipeService
    Field Summary
    Method Summary
    Example
    Interface QueryHandler
    Method Summary
    Interface RendezvousListener
    Method Summary
    Interface RendezVousService
    Method Summary
    Class ResolverResponseMsg
    Field Summary
    Constructor Summary
    Method Summary
    Interface ResolverService
    Method Summary
    Interface StructuredDocument
    Method Summary
    Class StructuredDocumentFactory
    Method Summary
    Example
    Interface StructuredTextDocument
    Method Summary
    Example
    Interface TextDocument
    Method Summary
    Interface TextElement
    Method Summary
    Example

Appendix C

    Current Add-on JXTA Services

Appendix D

    Latest JXTA Projects

Appendix E

    JXTA Resources
    Mailing Lists
    Discuss Mailing List
    Announce Mailing List
    Dev Mailing List
    User Mailing List
    JXTA Tutorials
    OpenP2P
    Sun.com

Appendix F

    JXTA Bindings
    Java
    Java ME (JXME)
    jxta-c
    jxtaPerl
    jxtapy
    jxtaruby
    pocketJXTA

Appendix G

    Other Peer-to-Peer Implementations and Toolkits
    IBM BabbleNet
    Intel
    Microsoft .NET and P2P
    The Peer-to-Peer Trusted Library
    The Bluetooth P2P Toolkit
    Other Tools

Index

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