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Developing Enterprise Web Services: An Architect's Guide: An Architect's Guide

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Developing Enterprise Web Services: An Architect's Guide: An Architect's Guide


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  • Copyright 2004
  • Dimensions: 7" x 9-1/4"
  • Pages: 592
  • Edition: 1st
  • Book
  • ISBN-10: 0-13-140160-2
  • ISBN-13: 978-0-13-140160-0

This book describes the key issues and technologies driving Web Services. It provides thorough coverage of concepts, issues, common problems and their solutions, technologies, and best practices necessary to build production-quality Web Services-based applications. Part 1 outlines the big picture for distributed computing environments. It reviews Web Services standards--such as SOAP, WSDL, and UDDI, highlighting key ideas that recur throughout the book. Building on the fundamentals, Part 2 introduces advanced technologies, including some emerging standards in important areas such as transactioning, security, mobile, and pervasive computing, and wireless environments. Drawing on experiences in developing real world Web Services-based applications, the authors present a set of best practices for application architectures based on this new distributed computing paradigm. Key technologies and recommendations are brought together by building an enterprise-scale Web Services-based application.

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Table of Contents

Foreword by David Bunnell.

1. Introduction.

What Are Web Services? SOAP. WSDL. UDDI. Why Web Services are Important. The Evolution of Web Applications. Not Just Another Distributed Computing Platform. Web Services and Enterprises. Moving Forward. Summary. Architect's Note.


2. XML Fundamentals.

XML: The Lingua Franca of Web Services. XML Documents. XML Namespaces. Explicit and Default Namespaces. Inheriting Namespaces? ? and Not Inheriting Namespaces. Attributes and Namespaces. XML Schema. XML Schema and Namespaces. A First Schema. Implementing XML Schema Types. The any Element. Inheritance. Substitution Groups. Global and Local Type Declarations. Managing Schemas. Schemas and Instance Documents. XML Schema Best Practices. Processing XML. SAX: Simple API for XML. DOM: Document Object Model. Extensible Stylesheet Transformation (XSLT) and XML Path Language (XPATH). Summary. Architect's Note.

3. SOAP and WSDL.

The SOAP Model. SOAP. SOAP Messages. SOAP Envelope. SOAP Header. SOAP Body. SOAP Faults. SOAP Encoding. SOAP RPC. Using Alternative SOAP Encodings. Document, RPC, Literal, Encoded. Document. RPC. Literal. Encoded. SOAP RPC and SOAP Document-Literal. SOAP, Web Services, and the REST Architecture. Looking Back to SOAP 1.1. Syntactic Differences between SOAP 1.2 and SOAP 1.1. Changes to SOAP-RPC. SOAP encoding. WSDL. WSDL Structure. The Stock Quote WSDL Interface. Definitions. The Types Element. Bindings. Services. Managing WSDL Descriptions. Extending WSDL8. Using SOAP and WSDL. Service Implementation and Deployment. Binding to, and Invoking Web Services. Where's the Hard Work? Summary. Architect's Note.

4. UDDI-Universal Description, Discovery, and Integration.

UDDI at a Glance. Analogies with Telephone Directories. The UDDI Business Registry. UDDI Under the Covers. The UDDI Specification. UDDI Core Data Structures. Accessing UDDI. How UDDI Is Playing Out. UDDI and Lifecycle Management. UDDI and Dynamic Access Point Management. Summary. Architect's Note.


5. Conversations.

Conversations Overview. Conversational Requirements for B2B Interactions. Web Services Conversation Language. Consuming WSCL Interfaces. WSCL Interface Components. Interactions. Transitions. Conversations. The Bar Scenario Conversation. Relationship Between WSCL and WSDL. What WSCL Doesn't Do. Summary. Architect's Note.

6. Workflow.

Business Process Management. Workflows and Workflow Management Systems. Workflows. Workflow Management Systems Drawbacks. Web Services and Workflow. Business Process Execution Language for Web Services (BPEL). The BPEL Stack. Activities. Service Linking, Partners, and Service References. Message Properties and Property Aliases. Correlating Messages. Containers and Data Handling. Workflow Example: On-line Shop. BPEL 1.1 and OASIS WSBPEL. BPEL and its Relation to BPML, WSCI, WSFL, and Xlang and Others. Summary. Architect's Note.

7. Transactions.

ACID Transactions. Distributed Transactions and Two-Phase Commit. The Two Phase Commit Approach. Dealing with Heuristic Outcomes. Advanced Topics: Nesting and Interposition. Scaling Transactions to Web Services. OASIS Business Transaction Protocol. The BTP Model. Implementing with BTP. Consuming Transactional Web Services. Client API. Under the Covers: BTP's Two-Pipe Model. Transactionalizing Web Services. Supporting Infrastructure. Participants. Compensating Actions: A Strategy for Participant Implementation. Integrating Participants and Services. The Transaction Manager. Bringing it all Together: A Cohesive Example. BTP: In a Nutshell. Other Web Services Transaction Protocols. Microsoft .Net. J2EE and Enterprise Java Beans. WS-Coordination and WS-Transaction. Summary. Architect's Note.

8. Security.

Everyday Security Basics. Security Is an End-to-End Process. Data Handling and Forwarding. Data Storage. Errors in Identity. Web Service Security Issues. Data Protection and Encryption. Authentication and Authorization. Non-repudiation and Signatures. Types of Security Attacks and Threats. Malicious Attacks. Denial of Service Attacks. Dictionary Attacks. Internal Threats. Web Services Security Roadmap. WS-Security. The Security Header Element. The UsernameToken Element. The BinarySecurityToken Element. The SecurityTokenReference Element. The KeyInfo Element. The Signature Element. The ReferenceList Element. The EncryptedKey Element. The EncryptedData Element. Putting It All Together. Preventing Replay Attacks. Summary. Architect's Notes.

9. Quality-of-Service.

What is QoS? Why is QoS Important for Web Services? Full Control versus Predictable Worst-Case Performance. QoS Metrics for Web Services. Where are the Holes? XML. HTTP. Communication Networks. Server-side Infrastructure. Design Patterns and Best Practices. Use Coarse-Grained Web Services. Build the Right Client Application. Cache Web Service Results. Use Resources Efficiently. Building QoS into Web Services and Applications. QoS-Enabled Web Services. Communicating QoS to Client Applications. Lifecycle Management. QoS-enabled Applications. Monitoring QoS Performance. Discovering the Right Service. Recovering from Service Failures. Summary. Architect's Note.

10. Mobile and Wireless.

Mobile Web Services. Challenges With Mobile. The Wireless Network. Limited Computing Resources. User Interfaces. Proxy-based Mobile Systems. Mobile Messaging Platform. Flash ActionScript Mobile Application User Interface. Invoking Web Services Directly Through a Proxy Server. Direct Mobile Web Service Access. J2ME Web Services. Supported APIs. Programming Model. Summary. Architect's Notes.

11. Portals and Services Management.

Portals. Programmatic and Interactive Web Service Interfaces. The WSRP and WSIA Specifications. Building Portlets and Portals with WSRP. Restrictions. Deploying and Locating Services. Putting It All Together. Summary. Web Services Management. The Objectives of Web Services Management. Web Services Management Modules. Web Services Distributed Management. Summary. Architect's Notes.


12. Real World Web Service Application Development-Foundations.

Enterprise Procurement. System Functionality and Architecture. Running the EPS Application. System Implementation. VendorAOrdering.java. VendorAProcurement.wsdl. EPS.html. EPSCatalog.html. ServiceServlet.java. Client-side Binding Stubs. OutputServlet.java. Deploying the Application. Running the Application. Direct Web Service Invocations (without Binding Stubs). Where Are the Holes? Summary. Architect's Notes.

13. Real World Web Service Application Development — Advanced Technologies.

Introduction. Building Evolvable and Composable Workflows. Automating the Procurement Process. Augmenting Remote WSDL Interfaces. Implementing the BPEL Workflow Script. Deploying and Executing BPEL Workflows. Adding Transaction Support. Changes to the Backend Systems. Transaction-Aware Service Implementation. Implementing Participants. Consuming Transactional Web Services. Programming for Mobility. Securing the Application. HTTP Security. Summary. Architect's Notes.

14. Epilogue.

Current Standards and Future Trends. XML. SOAP and WSDL. UDDI. Transactions. Security. Conversations. Workflow. Quality of Service. Mobile and Wireless. Standards Organizations. W3C. OASIS. WS-I. Vendor Specifications. Platforms. Microsoft.Net. J2EE. A Single Web Services Platform? Summary.



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