Perspectives on Web Services

by Zimmermann, Olaf; Tomlinson, Mark; Peuser, Stefan

• ISBN13: 9783540009146
• ISBN10: 3540009140
• Format: Hardcover
• Copyright: 2003-10-01
• Publisher: Springer Verlag

Summary

Contains everything that a project team needs to know about the development and deployment of Web services with the IBM WebSphere product family. Included will be examples for all development artifacts in a format that can be reused in the readera??s project. It combines the authorsa?? own practical experiences with consolidated information on the latest product capabilities in a unique approach that allows the book to be easily accessible to a broad spectrum of readers. Finding a balance between a euphoric/optimistic and down-to earth/realistic view on the subject, this book will be an essential part of every Web service developera??s bookshelf.

Table of Contents

Foreword	V
Dedications	VII
Preface	IX
Motivation for this Book	IX
Mission Statement	IX
Who Should Read this Book?	X
The Perspectives Metaphor	X
Non-Goals	X
Approach	XI
Outline to the Book Structure	XII
Prerequisite Skills	XIV
Notational Conventions	XV
About the Authors	XVI
Table of Contents	XVII
Acknowledgements	XXV
List of Abbreviations	XXVII
1 The Business Perspective	1	(30)
1.1 The Sponsor's View ... and a Few Other Opinions	1	(1)
1.2 Web Services - Holy Grail or Déjà Vu?	2	(10)
1.2.1 Business Drivers and Benefits	2	(2)
1.2.2 Requirements for Application-to-Application Communication	4	(4)
1.2.3 Additional Advantages	8	(2)
1.2.4 Litmus Test (a.k.a. Applicability Filter)	10	(2)
1.3 Usage Scenarios	12	(9)
1.3.1 Enterprise Application Integration (EAI)	13	(2)
1.3.2 Business-to-Business (B2B)	15	(2)
1.3.3 Common Services	17	(1)
1.3.4 Miscellaneous Scenarios	18	(3)
1.4 Potential Inhibitors	21	(5)
1.4.1 Over-Enthusiastic Expectations	21	(1)
1.4.2 Goal Conflicts	22	(1)
1.4.3 Skepticism about New Technology	22	(1)
1.4.4 Security and Performance Concerns	23	(1)
1.4.5 Logistical and Organizational Issues	24	(1)
1.4.6 Skill Deficiencies	24	(1)
1.4.7 Roll-Your-Own (RYO) Temptation	25	(1)
1.4.8 So Do the Inhibitors Really Inhibit Us?	25	(1)
1.5 Introduction to the Case Study	26	(2)
1.5.1 Background Information	26	(1)
1.5.2 The Business Problem	26	(1)
1.5.3 Solution Outline	27	(1)
1.6 Summary	28	(3)
1.6.1 Key Messages	28	(2)
1.6.2 Where to Find More Information	30	(1)
1.6.3 What's Next	30	(1)
2 The Training Perspective	31	(124)
2.1 The Trainer's View ... And What the Trainees Think	31	(2)
2.2 Web Services Concepts in a Nutshell	33	(3)
2.2.1 Roles and Relationships	33	(2)
2.2.2 A First Look at the Case Study Solution	35	(1)
2.2.3 Where to Go from Here	35	(1)
2.3 XML, XML Namespaces and XML Schema	36	(39)
2.3.1 An XML Overview	36	(12)
2.3.2 XML Namespaces	48	(5)
2.3.3 XML Schema	53	(21)
2.3.4 Summary and Next Steps	74	(1)
2.4 Understanding SOAP	75	(29)
2.4.1 The SOAP Message Format	77	(10)
2.4.2 The SOAP Section 5 Encoding	87	(11)
2.4.3 SOAP Communication Styles	98	(4)
2.4.4 Summary and Next Steps	102	(2)
2.5 Understanding WSDL	104	(27)
2.5.1 The WSDL Building Blocks	104	(5)
2 5 2 The Containment Structure of a WSDL Document	109	(12)
2.5.3 The Logical Relationships between WSDL Elements	121	(1)
2.5.4 The SOAP Binding	121	(8)
2.5.5 Summary and Next Steps	129	(2)
2.6 Understanding UDDI	131	(21)
2.6.1 The UDDI Registry Structure	132	(8)
2.6.2 Linking WSDL Documents to a UDDI Registry	140	(5)
2.6.3 A Brief UDDI API Overview	145	(4)
2.6.4 Private versus Public UDDI Registries	149	(1)
2.6.5 Summary	150	(2)
2.7 Summary	152	(3)
2.7.1 Key Messages	152	(1)
2.7.2 Where to Find More Information	153	(1)
2.7.3 What's Next	154	(1)
3 The Architecture Perspective	155	(86)
3.1 The Architect's View	155	(1)
3.2 Introduction to Web Services Architectures	156	(17)
3.2.1 Motivation	156	(4)
3.2.2 Introduction to the W3C Web Services Architecture	160	(7)
3.2.3 Service-Oriented Architecture and Java	167	(6)
3.3 Web Services Principles and Patterns	173	(15)
3.3.1 General Architectural Principles and Design Patterns	173	(4)
3.3.2 Business Patterns	177	(3)
3.3.3 Architectural Patterns	180	(8)
3.4 Architectural Decisions	188	(19)
3.4.1 Service Modeling: WSDL and XML Schema	189	(2)
3.4.2 Service Messaging: SOAP	191	(5)
3.4.3 Service Matchmaking: UDDI and WSIL	196	(3)
3.4.4 General Decisions	199	(5)
3.4.5 Software Architecture for the Case Study	204	(3)
3.5 Non-Functional Requirements (NFRs)	207	(5)
3.5.1 Performance	207	(2)
3.5.2 Scalability	209	(1)
3.5.3 Availability	210	(1)
3.5.4 Robustness	210	(1)
3.5.5 Portability	211	(1)
3.6 Gaps and Countermeasures	212	(19)
3.6.1 The XML Language Binding and Encoding Maze	212	(10)
3.6.2 Security	222	(5)
3.6.3 Web Service Management	227	(2)
3.6.4 Transactional and Context Semantics	229	(1)
3.6.5 Process Orchestration and Workflow	229	(2)
3.7 Frequently Asked Questions	231	(7)
3.8 Summary	238	(3)
3.8.1 Key Messages	238	(2)
3.8.2 Where to Find More Information	240	(1)
3.8.3 What's Next	240	(1)
4 The Development Perspective	241	(192)
4.1 A Developer's View	241	(4)
4.2 Introduction to Developing Web Services in Java	245	(14)
4.2.1 IBM Development Tools Supporting Web Services	245	(4)
4.2.2 Getting Started with Eclipse and WebSphere Studio	249	(1)
4.2.3 Selecting a Web Services Implementation	250	(7)
4.2.4 Conclusions	257	(2)
4.3 Preparing the Sample Application	259	(10)
4.3.1 Background to the Sample	259	(2)
4.3.2 Current Implementations	261	(1)
4.3.3 Constructing the New Applications	262	(4)
4.3.4 Configuring the Sample Application	266	(2)
4.3.5 Summary	268	(1)
4.4 Building rpc/encoded Services from Java	269	(25)
4.4.1 Introduction	269	(2)
4.4.2 Building EJB Web Services with Apache SOAP	271	(11)
4.4.3 Building EJB Web Services with JAX-RPC and JSR 109	282	(11)
4.4.4 Conclusions	293	(1)
4.5 Building Web Service Clients	294	(20)
4.5.1 Introduction	294	(1)
4.5.2 Web Service Clients using Apache SOAP	295	(6)
4.5.3 Web Service Clients using JAX-RPC and JSR 109	301	(12)
4.5.4 Conclusions	313	(1)
4.6 Building rpc/encoded Services from WSDL	314	(15)
4.6.1 Introduction	314	(1)
4.6.2 Creating Web Services from WSDL using Apache SOAP	315	(6)
4.6.3 Creating Web Services from WSDL using JAX-RPC/JSR 109	321	(7)
4.6.4 Conclusions	328	(1)
4.7 Programmatic Access to WSDL	329	(7)
4.7.1 Introduction to Working with WSDL in Java	329	(2)
4.7.2 Creating JWSDL Clients with Apache SOAP,	331	(3)
4.7.3 Creating JWSDL Clients with JAX-RPC and JSR 109	334	(1)
4.7.4 Conclusions	335	(1)
4.8 Using WS-Inspection to Build Service Indices	336	(10)
4.8.1 Introduction to Using WS-Inspection from Java	336	(1)
4.8.2 Using WS-Inspection with Apache SOAP	337	(7)
4.8.3 Using WS-Inspection with JAX-RPC and JSR 109	344	(1)
4.8.4 Conclusions	345	(1)
4.9 Using UDDI	346	(12)
4.9.1 Introduction to UDDI Access from Java and Browsers	346	(2)
4.9.2 Using UDDI with Apache SOAP	348	(6)
4.9.3 Using UDDI with JAX-RPC and JSR 109	354	(3)
4.9.4 Conclusions	357	(1)
4.10 Using Other Web Services Bindings	358	(10)
4.10.1 Introduction to the Web Services Invocation Framework	358	(2)
4.10.2 Working with WSIF and Apache SOAP	360	(4)
4.10.3 Using WSIF with JAX-RPC and JSR 109	364	(3)
4.10.4 Conclusions	367	(1)
4.11 Creating a document/literal Service from WSDL	368	(15)
4.11.1 Introduction	368	(1)
4.11.2 Defining the document/literal Service Interface	369	(3)
4.11.3 Document/literal Services with Apache SOAP	372	(5)
4.11.4 Document/literal Services with JAX-RPC and JSR 109	377	(4)
4.11.5 Conclusions	381	(2)
4.12 Creating a document/literal Service Client	383	(9)
4.12.1 Introduction	383	(1)
4.12.2 Document/literal Clients with Apache SOAP	384	(4)
4.12.3 Document/literal Clients with JAX-RPC and JSR 109	388	(3)
4.12.4 Conclusions	391	(1)
4.13 Orchestrating Web Services	392	(18)
4.13.1 Introduction	392	(1)
4.13.2 Creating Services and the Public Service Interface	393	(4)
4.13.3 Completing the Process Implementation	397	(5)
4.13.4 Other Features in the Process Editor	402	(2)
4.13.5 Deploying the Orchestrated Service	404	(4)
4.13.6 Testing the Orchestrated Service	408	(1)
4.13.7 Conclusions	409	(1)
4.14 Using Attachments with SOAP	410	(7)
4.14.1 Introduction	410	(1)
4.14.2 Creating SOAP Attachments with Apache SOAP	411	(3)
4.14.3 Creating SOAP Attachments with JAX-RPC and JSR 109	414	(2)
4.14.4 Conclusions	416	(1)
4.15 Using SOAP Headers	417	(10)
4.15.1 Introduction	417	(1)
4.15.2 Implementing Headers with Apache SOAP	417	(3)
4.15.3 Implementing Headers with JAX-RPC and JSR 109	420	(6)
4.15.4 Conclusions	426	(1)
4.16 Exporting the Completed Sample	427	(2)
4.17 Summary	429	(4)
4.17.1 Key Messages	429	(1)
4.17.2 Where to Find More Information	430	(1)
4.17.3 What's Next	431	(2)
5 The Operational Perspective	433	(78)
5.1 The System Administrator's View	433	(2)
5.2 System Architectures for Web Services Solutions	435	(17)
5.2.1 Introduction	435	(2)
5.2.2 Basic Topology	437	(1)
5.2.3 Standalone Topology	437	(4)
5.2.4 Placement of Additional Components	441	(2)
5.2.5 Clustered and Managed Topology	443	(6)
5.2.6 System Architecture for Premier Quotes	449	(1)
5.2.7 Summary	450	(2)
5.3 Deploying Web Services	452	(22)
5.3.1 Introduction to WebSphere Application Server	452	(2)
5.3.2 Deployment Overview	454	(1)
5.3.3 Configuring the Application Server	455	(5)
5.3.4 Deploying Services	460	(4)
5.3.5 Working with the Private UDDI Registry	464	(2)
5.3.6 Testing the Service	466	(1)
5.3.7 Clustering	467	(4)
5.3.8 Working with the IBM HTTP Server	471	(3)
5.4 Securing a Web Services Implementation	474	(27)
5.4.1 Security Threats and Countermeasures	474	(2)
5.4.2 WS-Security	476	(8)
5.4.3 Securing Web Services with HTTPS and SSL	484	(17)
5.5 The Web Services Gateway	501	(8)
5.5.1 Introduction	501	(1)
5.5.2 Configuring the Gateway	502	(2)
5.5.3 Deploying a Web Service to the Gateway	504	(1)
5.5.4 Updating the Client and Testing	505	(4)
5.6 Summary	509	(2)
5.6.1 Key Messages	509	(1)
5.6.2 Where to Find More Information	509	(1)
5.6.3 What's Next	509	(2)
6 The Engagement Perspective	511	(28)
6.1 The Project Manager's View	511	(1)
6.2 Planning a Web Services Development Project	512	(12)
6.2.1 Step 1: Identify Business Need	512	(2)
6.2.2 Step 2: Outline Requirements and High Level Design	514	(1)
6.2.3 Step 3: Plan and Staff the Project	515	(3)
6.2.4 Step 4: Run the Project	518	(1)
6.2.5 Success Factors and Elements of Risk	519	(3)
6.2.6 A Final Look at the Case Study	522	(1)
6.2.7 Wrap Up	523	(1)
6.3 Lessons Learned and Design Advice	524	(11)
6.3.1 Lessons Learned	524	(3)
6.3.2 Best Practices	527	(8)
6.4 Summary	535	(4)
6.4.1 Key Messages	535	(3)
6.4.2 Where to Find More Information	538	(1)
6.4.3 What's Next	538	(1)
7 The Future Perspective	539	(28)
7.1 An Optimistic and a Pessimistic View	539	(1)
7.2 Emerging Specifications	540	(8)
7.2.1 SOAP Version 1.2	540	(2)
7.2.2 WSDL Version 1.2	542	(1)
7.2.3 UDDL Version 3.0	543	(2)
7.2.4 J2EE and Web Services	545	(1)
7.2.5 Business Process Execution Language for Web Services	546	(1)
7.2.6 Other Specification Work	547	(1)
7.3 Web Services and Grid Computing	548	(6)
7.3.1 Motivation for Grid Computing	548	(1)
7.3.2 What is a Grid?	549	(1)
7.3.3 Grid Services	550	(1)
7.3.4 A Services Execution Platform	551	(1)
7.3.5 A Few Grid Services Examples	552	(1)
7.3.6 Summary and Outlook	553	(1)
7.4 A Quick Look at the Semantic Web	554	(7)
7.4.1 The Semantic Web "Stack"	554	(1)
7.4.2 Resource Description Framework (RDF)	555	(2)
7.4.3 Web Ontology Language (OWL)	557	(2)
7.4.4 The Semantic Web and Web Services	559	(1)
7.4.5 Where to Find More Information	560	(1)
7.5 Concluding Thoughts	561	(6)
7.5.1 A Final Look at Specifications and Implementations	561	(1)
7.5.2 Coming Up	562	(3)
7.5.3 Web Services - Holy Grail or Déjà Vu?	565	(1)
7.5.4 Where to Find More Information	566	(1)
7.5.5 What's Next	566	(1)
A Creating the Sample Applications	567	(44)
A.1 Building the Premier Quotes Policy System	567	(15)
A.1.1 Configuring a Cloudscape Environment	567	(1)
A.1.2 Creating a New Database	568	(2)
A.1.3 Creating the Project Structures in WebSphere Studio	570	(1)
A.1.4 EJB-RDBMS Mapping Approaches	570	(1)
A.1.5 Creating the Database Schema	571	(4)
A.1.6 Generating Entity EJBs from the Database Schema	575	(3)
A.1.7 Creating a WebSphere Server to Deploy the Application	578	(1)
A.1.8 Binding the EJBs to the New Data Source	579	(1)
A.1.9 Populating the Database with Sample Data	580	(1)
A.1.10 Data for Premier Quotes Cloudscape Database	580	(2)
A.2 Updating the Premier Quotes Policy System	582	(11)
A.2.1 Completing the Entity EJB Implementations	582	(1)
A.2.2 Creating the Session EJB	583	(1)
A.2.3 Creating Value Objects to Return from the Session Bean	583	(2)
A.2.4 Inserting the Business Logic	585	(3)
A.2.5 Creating a Local EJB Reference to the Address Entity	588	(1)
A.2.6 Deploying the Application	589	(1)
A.2.7 Testing the New Premier Quotes Policy System	589	(4)
A.3 Building the Dirt Cheap Policy System	593	(4)
A.3.1 Creating the New Database	593	(1)
A.3.2 Creating the Project Structure in WebSphere Studio	593	(1)
A.3.3 Copying a Database Schema	593	(1)
A.3.4 Defining a New JDBC Data Source	594	(1)
A.3.5 Deploying the New Enterprise Application	595	(1)
A.3.6 Populating the Database with Sample Data	595	(1)
A.3.7 Data for Dirt Cheap Insurance Cloudscape Database	595	(2)
A.4 Updating the Dirt Cheap Policy System	597	(6)
A.4.1 Building JDBC Wrappers	597	(3)
A 4 2 Defining a JDBC Resource Reference	600	(1)
A.4.3 Testing the New Dirt Cheap Insurance Policy System	601	(2)
A.5 Configuring the WebSphere SDK for Web Services	603	(8)
A.5.1 Setting up the Command Line Environment	603	(1)
A.5.2 Updating the Server Classpath	604	(1)
A.5.3 Changing the Default Classloading Behavior	604	(1)
A.5.4 Resolving Problems with the Default UDDI Data Source	604	(1)
A.5.5 Changing Java 2 Security Privileges for Libraries	605	(1)
A.5.6 Configuring the Application Server	605	(4)
A.5.7 Installing the Universal Test Client	609	(1)
A.5.8 Script to Remove JDBC Providers	610	(1)
B Java to XML Mapping Reference	611	(4)
B.1 Apache SOAP 2.3 Mappings	611	(2)
B.2 JAX-RPC Mappings	613	(2)
C Appendix C#	615	(12)
C.1 Overview to Building NET Web Service Clients	615	(3)
C.2 Developing rpc/encoded Clients in C#	618	(5)
C.3 Developing document/literal Clients in C#	623	(4)
Sources of Information	627	(2)
References	629	(10)
Trademarks	639	(2)
Copyright Notices	641	(2)
Index	643