JXTA Java
™
Standard Edition v2.5:
Programmers Guide
September 10
th
, 2007
JXSE 2.5 Programmers Guide : 1
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JXSE 2.5 Programmers Guide : 2
Table of Contents
Introduction................................................................................................7
Why JXTA™ ?...........................................................................................7
What is JXTA™ Technology?....................................................................8
What can be done with JXTA™ Technology? ..........................................8
Where to get JXTA™ technology.............................................................9
Getting Involved......................................................................................9
JXTA™ Architecture..................................................................................10
Overview...............................................................................................10
JXTA Components..................................................................................11
Key Aspects of the JXTA Architecture...................................................11
JXTA Concepts...........................................................................................12
Peers......................................................................................................12
Peer Groups...........................................................................................12
Network Services..................................................................................13
Peer Group Services..............................................................................13
Messages...............................................................................................15
Pipes......................................................................................................16
JxtaSocket and JxtaBiDiPipe.................................................................17
Advertisements......................................................................................19
Security.................................................................................................20
IDs.........................................................................................................21
Network Architecture...............................................................................22
Network Organization...........................................................................22
Shared Resource Distributed Index (SRDI)..........................................23
Queries..............................................................................................23
Firewalls and NAT.................................................................................26
JXTA Protocols...........................................................................................27
Peer Discovery Protocol........................................................................28
Peer Information Protocol.....................................................................28
Peer Resolver Protocol..........................................................................28
Pipe Binding Protocol............................................................................29
Endpoint Routing Protocol....................................................................29
Rendezvous Protocol.............................................................................30
The Basics.................................................................................................31
Getting Started......................................................................................31
Accessing On-line Documentation .......................................................31
Downloading Binaries...........................................................................31
Downloading Binaries...........................................................................31
Compiling JXTA Code............................................................................31
Running JXTA Applications...................................................................32
"Public JXTA Network" Configuration Setting......................................33
JXTA and HTTP Proxies ....................................................................33
JXSE 2.5 Programmers Guide : 3
Do I need a Proxy? ............................................................................33
Creating various ID types.....................................................................34
ID Tutorial source code.....................................................................35
Advertisements......................................................................................38
Advertisement Tutorial source..........................................................39
Messages and Message Elements.........................................................47
Design points for JXTA Messages......................................................47
Design points for Message Elements................................................48
Message and Message Element tutorial source................................49
Programming with JXTA...........................................................................56
HelloWorld Example..........................................................................56
Running the HelloWorld Example.....................................................56
Source Code: HelloWorld..................................................................57
Working with Local Configuration Example......................................58
Running the WorkingWithLocalConfiguration Example....................58
Pitfalls................................................................................................58
Source Code: WorkingWithLocalConfiguration................................59
Peer Discovery..........................................................................................62
Discovery Service..................................................................................62
DiscoveryClient.....................................................................................63
Source Code: DiscoveryClient...............................................................65
Source Code: DiscoveryServer..............................................................68
Membership Service.................................................................................71
Role of the Membership Service...........................................................71
Membership Service and Credentials...................................................71
Local Credentials and Remote Credentials...........................................71
Membership Services and Peer Groups................................................71
Membership Service and Other Services..............................................71
Membership Service Basic Operation ..................................................72
Remote Credentials & Access Control..................................................75
PSE Membership Service.........................................................................77
Introduction...........................................................................................77
The PSE Membership Service and Other Services...............................77
The PSE Membership Service and Keystores.......................................77
Accessing the PSE Membership Service...............................................77
PSE Membership Service Components.................................................77
PSE Membership First Steps................................................................77
The PSE Credential...............................................................................78
PSE Config............................................................................................78
Pipe Service..............................................................................................81
JXTA Pipe Service..................................................................................81
PipeServer.............................................................................................82
Source Code: PipeClient.......................................................................84
Source Code: PipeServer......................................................................86
Multicast Socket.......................................................................................90
Description............................................................................................90
JXSE 2.5 Programmers Guide : 4
Learning goals.......................................................................................90
Basic Operations...................................................................................90
Caveats..................................................................................................90
Source Code : JxtaMulticastSocketClient.............................................91
Source Code : JxtaMulticastSocketServer............................................93
Propagated Pipe Example.........................................................................95
PropagatedPipeClient...........................................................................95
Source Code: PropagatedPipeClient.....................................................97
Source Code : PropagatedPipeServer.................................................100
JxtaBiDiPipe Example.............................................................................105
JxtaBiDiPipe........................................................................................105
JxtaServerPipeExample.......................................................................106
Source Code: JxtaServerPipeExample................................................107
JxtaBidiPipeExample...........................................................................112
Source Code: JxtaBidiPipeExample.....................................................113
JxtaSocket Tutorial.................................................................................116
JxtaServerSocketExample...................................................................117
Source Code: SocketServer................................................................118
Pipe adertisement example.................................................................121
ClientSocket........................................................................................122
Source Code: SocketClient.................................................................123
JXTA Services..........................................................................................126
Creating a JXTA Service......................................................................127
Server..................................................................................................129
readMessages()...............................................................................130
Source Code: Service Server..............................................................131
Example Service Advertisement:....................................................135
Service Client......................................................................................136
Source Code: Service Client...............................................................138
Password Protected Peer Group.............................................................141
The constructor method PrivatePeerGroup()..................................142
createPeerGroup()...........................................................................142
createPasswdMembershipPeerGroupModuleImplAdv()..................143
createPeerGroupAdvertisement()....................................................144
discoverPeerGroup()........................................................................145
joinPeerGroup()...............................................................................145
completeAuth()................................................................................145
Source Code: PrivatePeerGroup.........................................................147
Glossary..................................................................................................155
Appendix I: References...........................................................................159
Appendix II: Troubleshooting.................................................................160
Errors compiling JXTA applications....................................................160
Errors running JXTA applications.......................................................160
Setting the classpath variable.........................................................160
Unable to discover JXTA peers........................................................160
Using the JXTA Shell...........................................................................160
JXSE 2.5 Programmers Guide : 5
