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Oracle Communications Converged Application Server是一款用于开发SIP（会话初始化协议）应用程序的服务器软件。SIP是一种信令协议，广泛用于启动、修改和终止互联网上或IP网络中的多媒体会话，如VoIP（声音通信协议）、视频会议、在线游戏和实时监控等。 Oracle® Communications Converged Application Server在开发SIP应用程序方面提供了一整套的工具和环境。这款服务器软件在2008年8月发布了第4.0版，用于支持广泛的通信服务，特别是在企业级通信和融合通信领域中扮演重要角色。标题中提到的“Developing SIP Applications”指的是开发人员如何利用Oracle Communications Converged Application Server来设计、构建和部署SIP应用程序。这些应用程序允许通信服务提供商，企业客户，以及开发人员构建以SIP为基础的服务，从而实现高效的语音、视频和消息传递服务。在描述中提到了一些与知识产权相关的许可和限制，即用户必须遵守与Oracle软件相关的许可证协议，以及不得进行任何形式的反向工程，除非是法律要求的互操作性目的。此外，软件文档中包含的信息可能随时更改，并且没有明确的错误保证。如果用户在软件中发现错误，他们有责任以书面形式通知Oracle。另外，如果软件或相关文档是向美国政府或由其代为许可的个人交付的，那么可能适用于特殊的政府权利声明和条款。文档中还提到了Oracle对软件的开发目的，即不是用于任何具有固有危险性的应用，包括可能导致人身伤害的应用。如果用户在这些危险应用中使用软件，则用户必须自己承担风险，并采取所有必要的安全预防措施，例如保险、备份、冗余和其他措施，以确保软件的使用安全。虽然提供的部分内容中存在一些OCR扫描技术导致的文字识别错误，但我们可以理解到，Oracle的Converged Application Server在支持SIP应用程序的开发方面，旨在提供一个强大、灵活的平台，让开发者能够构建各种复杂的企业通信解决方案。这个平台支持多种信息管理应用，并通过提供丰富的API、开发工具以及与其他Oracle通信产品集成的能力，为开发者提供广泛的可能性。总而言之，这份文档讲述的是关于Oracle Communications Converged Application Server第4.0版的发布信息、知识产权政策、软件的安全使用指南以及对美国政府交付的特殊条款。同时，它还强调了该服务器软件在SIP应用程序开发方面的用途、目的和适用范围，而开发者在使用该软件时需要严格遵守相关的许可协议和软件安全指南。

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Oracle® Communications Converged Application Server

Developing SIP Applications

Release 4.0

August 2008

Oracle Communications Converged Application Server Developing SIP Applications, Release 4.0

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Developing Diameter Applications iii

Contents

1. Overview of SIP Servlets

What is a SIP Servlet? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Differences from HTTP Servlets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

Multiple Responses. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

Receiving Responses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

Proxy Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

Message Body. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

ServletRequest. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

ServletResponse. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

SipServletMessage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8

Roles of a Servlet Container. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8

Application Management. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8

SIP Messaging. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10

Utility Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13

2. Porting Existing Applications to Oracle Communications

Converged Application Server

Application Router and Legacy Application Composition . . . . . . . . . . . . . . . . . . . . . . . . 2-2

SipSession and SipApplicationSession Not Serializable. . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

SipServletResponse.setCharacterEncoding() API Change . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Transactional Restrictions for SipServletRequest and SipServletResponse . . . . . . . . . . . 2-3

Immutable Parameters for New Parameterable Interface . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

iv Developing Diameter Applications

Stateless Transaction Proxies Deprecated. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Backward-Compatibility Mode for v1.0 Deployments. . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Validation Warnings for v1.0 Servlet Deployments. . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Modifying Committed Messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Path Header as System Header . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

SipServletResponse.createPrack() Exception . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

Proxy.proxyTo() Exceptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

Changes to Proxy Branch Timers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

Deprecated APIs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

SNMP MIB Changes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

Renamed Diagnostic Monitors and Actions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

3. Requirements and Best Practices for SIP Applications

Overview of Developing Distributed Applications for Oracle Communications Converged

Application Server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Applications Must Not Create Threads. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Servlets Must Be Non-Blocking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Store all Application Data in the Session . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

All Session Data Must Be Serializable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

. . . . . . . . . . . . . . . . . . . . Use setAttribute() to Modify Session Data in “No-Call” Scope3-4

send() Calls Are Buffered . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

Mark SIP Servlets as Distributable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7

Use SipApplicationSessionActivationListener Sparingly. . . . . . . . . . . . . . . . . . . . . . . . . 3-7

Observe Best Practices for Java EE Applications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7

4. Using Compact and Long Header Formats for SIP Messages

Overview of Header Format APIs and Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Summary of Compact Headers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

Developing Diameter Applications v

Assigning Header Formats with WlssSipServletMessage. . . . . . . . . . . . . . . . . . . . . . . . . 4-2

Summary of API and Configuration Behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

5. Composing SIP Applications

Application Composition Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Using the Default Application Router. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3

Configuring a Custom Application Router . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4

Session Key-Based Request Targeting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6

6. Developing Converged Applications

Overview of Converged Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

Assembling and Packaging a Converged Application. . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2

Working with SIP and HTTP Sessions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2

Modifying the SipApplicationSession . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5

Using the Converged Application Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6

7. Developing Custom Profile Providers

Overview of the Profile Service API. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1

Implementing Profile API Methods. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3

Configuring and Packaging Profile Providers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-4

Mapping Profile Requests to Profile Providers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-5

Configuring Profile Providers Using the Administration Console . . . . . . . . . . . . . . . . . . 7-6

8. Using Content Indirection in SIP Servlets

Overview of Content Indirection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1

Using the Content Indirection API . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2

Additional Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2

9. Securing SIP Servlet Resources

Overview of SIP Servlet Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1

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