Understanding SIP servlets 1.1

Providing a thorough overview to SIP (session initiation protocol) servlets 1.1, this unique resource serves as a practical guide to this exciting and emerging communications network technology. Covering all key concepts and their links into Java Enterprise Edition (JEE), the book discusses the construction, deployment and lifecycle of the SIP servlet. You find a detailed presentation of the role, responsibilities, and convergence of the SIP servlet container. Further, the book discusses the development and deployment of SIP technology, including guidance on SIP Servlet client programming.

Author Notes

Chris Boulton is the chief technology officer for NS Technologies and was formerly a technical research specialist working on next generation solutions for Avaya. He has been an active participant in the Internet Engineering Task Force (IETF) for more than six years. Mr. Boulton has authored and participated in numerous specifications related to the Session Initiation Protocol (SIP) and its related extensions. He is also a member of the JSR 289 SIP Servlet API Expert Group in the Java Community Process (JCP), is on the Technical Board of Advisors for the VoIP Security Alliance (VOIPSA), and has published numerous white papers on VoIP and related technologies.
Kristoffer Gronowski is a senior software architect at Ericsson Research, where he focuses on empowering development and evolution of communication services. He has worked most of his career in product development, and most recently he has been driving the architecture of the open source SailFin SIP container project. Mr. Gronowski is a member of the JSR289 SIP Servlet API Expert Group in the Java Community Process (JCP).

Gonzalo CamarilloJames Steadman

Foreword	p. xi
Foreword	p. xiii
Preface	p. xv
Part I Introduction to SIP Servlet Technology	p. 1
1 Introduction to SIP Servlets	p. 3
1.1 Session Initiation Protocol	p. 3
1.2 SIP Servlets and the SIP Servlet Vision	p. 15
1.3 Java Enterprise Edition	p. 17
1.3.1 Servlet Specification	p. 17
1.3.2 Annotations	p. 19
1.3.3 Enterprise JavaBeans (EJB)	p. 19
References	p. 21
2 The SIP Servlet Container	p. 23
2.1 Container Responsibilities	p. 23
2.1.1 Life-Cycle Management	p. 23
2.1.2 Protocol Compliance	p. 25
2.1.3 Mapping Requests to Servlets	p. 25
2.1.4 Receiving SIP Requests	p. 29
2.1.5 Receiving SIP Responses	p. 32
2.1.6 Session Targeting	p. 34
2.1.7 Session Utilities	p. 40
2.1.8 SIP Factory	p. 43
2.1.9 Timer Service	p. 45
2.2 Container Convergence	p. 47
2.2.1 HTTP Container Convergence	p. 48
2.2.2 JEE Container Convergence	p. 50
2.3 Security	p. 51
References	p. 56
3 The SIP Servlet Application	p. 58
3.1 SIP Servlet Packaging	p. 58
3.1.1 Deployment Descriptor	p. 60
3.2 Application Roles	p. 61
3.2.1 Proxy	p. 61
3.2.2 User Agent Client	p. 66
3.2.3 User Agent Server	p. 69
3.2.4 Back-to-Back User Agent	p. 71
3.3 Application Constructs	p. 76
3.3.1 SIP Application Session	p. 77
3.3.2 SIP Session	p. 78
3.3.3 Application Data Storage	p. 81
3.3.4 Session Lifetime and Invalidation	p. 83
3.3.5 Annotations	p. 88
References	p. 91
4 Application Router	p. 92
4.1 SIP Servlet 1.1 Composition Model	p. 92
4.2 Application Router, Container, and Application Interaction	p. 98
4.2.1 Subsequent Requests and Responses	p. 107
References	p. 109
5 Moving Forward	p. 110
5.1 SIP Servlet Threading Model	p. 110
5.2 Outstanding Issues	p. 111
5.3 SIP Protocol Support	p. 111
5.4 JSR 309	p. 112
References	p. 113
Part II Developer and Deployment Environments	p. 115
6 Relationship and Role Within IMS	p. 117
References	p. 122
7 SailFin 101	p. 123
8 SailFin Understanding	p. 141
8.1 History	p. 142
8.2 Architecture	p. 143
8.3 Logging	p. 145
8.4 Network Configuration	p. 147
8.5 SIP Container Architecture	p. 151
8.6 Writing Your Own Interceptor Layer	p. 158
8.6.1 Writing Custom Application Router	p. 164
8.7 Cluster Deployment	p. 169
8.7.1 Load Balancing and IP Sprayers	p. 175
8.7.2 ENUM	p. 180
References	p. 182
9 SIP Servlet Client Programming	p. 184
9.1 Writing HTTP Servlet-Based Client	p. 186
9.2 Using Asynchronous HTTP	p. 186
9.3 Using ICEfaces	p. 196
9.4 REST and JAX-RS	p. 202
9.4.1 Consuming a REST Service	p. 213
9.5 Java Me Jsr 180	p. 217
References	p. 227
10 The SIP Servlet Application Programming Interface (API)	p. 228
10.1 Container Utilities	p. 229
10.1.1 SipFactory	p. 229
10.1.2 AuthInfo	p. 231
10.1.3 SipSessionsUtil	p. 232
10.1.4 ConvergedHttpSession	p. 234
10.1.5 SipServletListener	p. 234
10.2 Application Constructs	p. 235
10.2.1 SipApplicationSession	p. 235
10.2.2 SipApplicationSessionActivationListener	p. 239
10.2.3 SipApplicationSessionAttributeListener	p. 240
10.2.4 SipApplicationSessionBindingListener	p. 241
10.2.5 SipApplicationSessionListener	p. 242
10.2.6 SipSession	p. 243
10.2.7 SipSessionActivationListener	p. 247
10.2.8 SipSessionAttributeListener	p. 248
10.2.9 SipSessionBindingListener	p. 249
10.2.10 SipSessionListener	p. 250
10.3 SIP Message Routing	p. 251
10.3.1 Proxy	p. 251
10.3.2 ProxyBranch	p. 255
10.3.3 B2BuaHelper	p. 258
10.3.4 SipErrorListener	p. 260
10.4 SIP Messaging Constructs	p. 261
10.4.1 SipServletMessage	p. 261
10.4.2 SipServletRequest	p. 269
10.4.3 SipServletResponse	p. 273
10.4.4 Address	p. 276
10.4.5 Parametable	p. 278
10.4.6 SipURI	p. 279
10.4.7 TelURL	p. 283
10.4.8 URI	p. 284
10.5 Timer Service	p. 285
10.5.1 TimerService	p. 286
10.5.2 ServlvetTimer	p. 287
10.5.3 TimerListener	p. 288
References	p. 289
About the Authors	p. 291
Index	p. 293

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Table of Contents