SOA with Java: Realizing Service-Orientation with Java Technologies

Description

“An outstanding depth-and-breadth resource for IT architects and Java professionals to understand and apply the marriage of SOA and modern Java.”
--Antonio Bruno, Enterprise Architecture and Strategy, digitalStrom

“A great self-contained book on SOA using flexible Java implementations....”
--Roger Stoffers, Hewlett Packard

“Provides clarity on abstract concepts and is filled with concrete examples of implementing SOA principles in Java environments.”
--Sanjay Singh, Certified SOA Architect

“...provides a holistic, comprehensive view on leveraging SOA principles and architecture for building and deploying performant Java services.”
--Suzanne D’Souza, KBACE Technologies

“Thomas Erl’s series of books on services technology have shaped, influenced, and strengthened a whole community of enterprise and solution architects’ thinking and solution development, and the much awaited SOA with Java book is an excellent addition to the series. It is a must-read.”
--Lalatendu Rath, Wipro Technologies

The Definitive Guide to Building Service-Oriented Solutions with Lightweight and Mainstream Java Technologies

Java has evolved into an exceptional platform for building Web-based enterprise services. In SOA with Java, Thomas Erl and several world-class experts guide you in mastering the principles, best practices, and Java technologies you need to design and deliver high-value services and service-oriented solutions.

You’ll learn how to implement SOA with lightweight frameworks, mainstream Java services technologies, and contemporary specifications and standards. To demonstrate real-world examples, the authors present multiple case study scenarios. They further demystify complex concepts with a plain-English writing style. This book will be valuable to all developers, analysts, architects, and other IT professionals who want to design and implement Web-based service-oriented architectures and enterprise solutions with Java technologies.

Topic Areas

• Applying modern service-orientation principles to modern Java technology platforms
• Leveraging Java infrastructure extensions relevant to service-oriented solutions
• Exploring key concepts associated with SOA and service-orientation within the context of Java
• Reviewing relevant Java platforms, technologies, and APIs
• Understanding the standards and conventions that REST and SOAP services are built upon in relation to Java implementations
• Building Java Web-based services with JAX-WS and JAX-RS
• Applying the eight key principles of service-orientation design using Java tools and technologies
• Creating Java utility services: architectural, design, and implementation issues
• Constructing effective entity services: service contracts, messages, data access, and processing
• Constructing task services, including detailed guidance on service composition
• Using ESBs to support infrastructure requirements in complex services ecosystems

Sample Content

Table of Contents

Foreword     xix
CHAPTER 1: Introduction     1
1.1 About This Book     2
Objectives of This Book     2
Who This Book Is For     2
What This Book Does Not Cover     3
1.2 Prerequisite Reading     3
How This Book Is Organized     4
1.3 How Principles and Patterns Are Used in This Book     7
1.4 Symbols and Figures     7
1.5 Additional Information     7
Updates, Errata, and Resources (www.servicetechbooks.com)      8
Referenced Specifications (www.servicetechspecs.com)      8
The Service Technology Magazine (www.servicetechmag.com)      8
Service-Orientation (www.serviceorientation.com)      8
What Is REST? (www.whatisrest.com)      8
What Is Cloud? (www.whatiscloud.com)      8
SOA and Cloud Computing Design Patterns (www.soapatterns.org, www.cloudpatterns.org)      8
SOA Certified (SOACP) Professional (www.soaschool.com)      9
Cloud Certified Professional (CCP) (www.cloudschool.com)      9
Big Data Science Certified Professional (BDSCP) (www.bigdatascienceschool.com)      9
Notification Service     9
CHAPTER 2: Case Study Examples     11
2.1 How Case Study Examples Are Used     12
Style Characteristics     12
Relationship to Abstract Content     12
Code Samples     12
2.2 Case Study Background: NovoBank     13
Technical Infrastructure     13
Automation Solutions     13
Business Obstacles and Goals     14
Future IT Roadmap     15
1. Build Reusable Business Services     15
2. Consolidate Information     16
3. Improve Channel Experience     16
4. Build Services Infrastructure     16
2.3 Case Study Background: SmartCredit Co     16
Technical Infrastructure     17
Automation Solutions     17
Business Goals     17
Future IT Roadmap     18
PART I: FUNDAMENTALS
CHAPTER 3: Fundamental SOA Concepts     21
3.1 Basic Terminology and Concepts     22
Service-Oriented Computing     22
Service-Orientation     24
Service-Oriented Architecture (SOA)      27
SOA Manifesto     28
Services     29
Cloud Computing     29
IT Resources     30
Service Models     30
Agnostic Logic and Non-Agnostic Logic     31
Service Inventory     32
Service Portfolio     32
Service Candidate     33
Service Contract     33
Service-Related Granularity     34
Service Profiles     35
SOA Design Patterns     36
3.2 Further Reading     38
CHAPTER 4: Basic Java Distributed Technologies     39
4.1 Java Distributed Computing Basics     40
Java SE Architecture     41
Java EE Architecture     41
The Beginning of Java EE     41
Application Packaging and Deployment     44
Deployment Descriptors     44
Java EE Architectural Tiers     45
4.2 Java Distributed Technologies and APIs     46
Java SE APIs     46
RMI     46
RMI / IIOP     47
JNDI     48
JDBC     49
Java EE APIs     49
Contexts and Dependency Injection     49
JTA     50
Java EE Connector Architecture     51
EJB     51
Session EJBs     52
Persistence Entities     53
Service-Orientation Principles and the EJB Model     55
JMS     56
Message-Driven Beans     58
Security in Java EE     58
4.3 XML Standards and Java APIs     59
XML     59
XML Schema Definition     61
XSLT     63
JAXP     63
JAXB     64
4.4 Building Services with Java Components     64
Components as Services     65
Application Protocols     65
Service Contracts     68
Location     68
Operations     69
Messages     69
Further Considerations     70
Components as Services and Service-Orientation     71
Standardized Service Contract     71
Service Loose Coupling     71
Service Abstraction     72
Service Discoverability     72
4.5 Java Vendor Platforms     74
GlassFish Enterprise Server     74
IBM WebSphere Application Server     75
IBM WebSphere Application Server Community Edition     78
Oracle WebLogic Server     79
CHAPTER 5: Web-Based Service Technologies     81
5.1 SOAP-Based Web Services     82
Extensibility of Web Services Standards (WS-*)     88
WS-Addressing     89
SOAP with Attachments (SwA)      90
WS-ReliableMessaging     91
WS-Transaction     92
WS-Security     93
WS-Policy     94
Web Services Distributed Management     95
Common Web Services Middleware     95
Enterprise Service Bus (ESB)      95
Orchestration     97
Management and Monitoring     99
Registries and Repositories     99
Service Construction and Assembly     100
5.2 REST Services     101
HTTP Response Codes     102
Resources and Addresses     103
Service Request     104
Service Response     104
Service Request     104
Service Response     104
HTTP Methods     106
Resource Representations     108
The ACCEPT Header     109
CHAPTER 6: Building Web-Based Services with Java     111
6.1 JAX-WS     112
SAAJ     115
Handlers     118
Web Services Engines and Toolkits     119
JAXR     120
6.2 Java Implementations of WS-* Standards     122
Advanced Web Services Standards and Frameworks     122
Service Component Architecture     123
Spring-WS     124
6.3 JAX-RS     124
Implementing JAX-RS     125
Implementing REST Services     129
Scalability     130
Statelessness     131
Uniform Contract     131
Cacheability     131
Addressability     132
Security     132
REST Service Support     134
PART II: SERVICES
CHAPTER 7: Service-Orientation Principles with Java Web-Based Services     139
7.1 Service Reusability     140
Agnostic Functional Contexts     140
Highly Generic Service Logic     141
Generic and Extensible Service Contracts     144
Concurrent Access to Service Logic     145
7.2 Standardized Service Contract     151
Top-Down vs. Bottom-Up     151
Mapping Between Java and WSDL     152
Wrapped Document/Literal Contracts     153
Implicit and Explicit Headers     154
Explicit Headers     154
Implicit Headers     157
No Headers     159
Data Mapping with REST     159
Conversion Between JSON and POJOs     161
Binary Data in Web Services     165
Binary Data in REST Services     170
Use of Industry Standards     175
7.3 Service Loose Coupling     176
Separation of Contract and Implementation     177
Independent Functional Contexts     179
Service Consumer Coupling     180
7.4 Service Abstraction     184
Abstracting Technology Details     185
Hiding Service Details     185
Document Constraints     188
7.5 Service Composability     189
Runtime Environment Efficiency     190
Service Contract Flexibility     192
Standards-Based Runtime     193
7.6 Service Autonomy     194
Well-Defined Functional Boundary     194
Runtime Environment Control     195
High Concurrency     196
7.7 Service Statelessness     197
Orchestration Infrastructure     198
Session State     198
Storing State     199
7.8 Service Discoverability     204
Design-Time Discoverability     204
Runtime Discoverability     205
Service Registries     208
CHAPTER 8: Utility Services with Java     211
8.1 Inside the Java Utility Service     212
Architectural Considerations     212
Utility Service Taxonomy     220
8.2 Utility Service Design and Implementation     221
Utility Service Design     221
Utility Services and Java Editions     226
Utility Services in Java SE     226
Utility Services in Java EE     227
Utility Services and Open-Source Frameworks     229
Spring Framework     229
Transaction Management     229
Data Access Objects     230
Object-Relational Mapping     230
JMS     230
JMX     230
JCA     231
Spring MVC      231
Hibernate     231
Commons Logging and Log4J     231
Utility Services as Web-Based Services     231
Sending XML Data as a String     232
Utilizing <xsd:any/>     233
Provider-Style Web Service Logic in JAX-WS     234
Building REST Utility Services     236
Testing Considerations     238
Packaging Considerations     239
8.3 Utility Service Types     240
Omni Utility Services     240
Design Considerations     241
Service Implementation     241
Service Consumption     241
Resource Utility Services     248
Persistence/Data Access Resources     248
Messaging Resources     248
Transaction Resources     249
Design Considerations     249
Service Implementation     251
Service Consumption     251
Micro-Utility Services     253
Design Considerations     253
Service Implementation     253
Service Consumption     254
Wrapper Utility Services     257
Design Considerations     258
Service Implementation     259
Service Consumption     259
CHAPTER 9: Entity Services with Java     261
9.1 Inside the Java Entity Service     262
Architectural Considerations     263
Domain Entities vs. Message Entities     265
Data Aggregation     266
Data Access Modes     267
Change Notifications     268
9.2 Java Entity Service Design and Implementation     270
Entity Service Design     270
Designing Domain Entities and Message Entities     271
Designing Stateless Entity Services     272
Designing Business-Relevant Entity Services     273
Designing Generic Entity Services     273
Designing Aggregating Entity Services     275
Entity Service Implementation     278
Java Editions     278
Entity Services as Web-Based Services     282
Entity Web Services Using SOAP     283
REST Entity Services     291
Read-Only and Read-Write Resources     292
Resource Granularity     292
Resource Creation and Location     292
Request Message     292
Response Message     293
Resource Relationships     294
Request Message     294
Response Message     294
Request Message     295
Resource Collections     295
Request Message     295
Response Message     295
Aggregate Entities     297
Request Message     298
Response Message     298
Open-Source Frameworks     302
Testing Considerations     302
Java Packaging Considerations     303
PART III: SERVICE COMPOSITION AND INFRASTRUCTURE
CHAPTER 10: Task Services with Java     307
10.1 Inside a Task Service     308
Performance Considerations     315
10.2 Building Task Services     316
Implementation Considerations     316
Web-Based Task Services     320
Task Services with SOAP and WSDL     320
Task Services with REST     324
Testing Considerations     332
Packaging Considerations     334
CHAPTER 11: Service Composition with Java     335
11.1 Inside Service Compositions     336
Service Composition Roles     336
Compositions and MEPs     337
Synchronous and Asynchronous Invocation     338
Service Level Agreements (SLAs)      339
11.2 Java Service Composition Design and Implementation     340
Composition Logic: Coding vs. Orchestration     340
REST Service Composition Considerations     341
Composition Member Endpoints     344
Error Handling     345
Schema Type Reuse     353
Web-Based Services vs. Java Components     359
Packaging, Testing and Deploying Composed Services     362
11.3 Service and Service Composition Performance Guidelines     368
Measuring Performance     368
Testing Performance     370
Caching     371
Data Grids     371
REST Caching     372
Scaling Out Services with State     374
Handling Failures     375
Parsing and Marshaling     376
CHAPTER 12: ESB as SOA Infrastructure     379
12.1 Basic Traditional Messaging Frameworks     380
RPC vs. Messaging     381
Technology Coupling     82
Spatial Coupling     382
Temporal Coupling     382
Message Producers and Message Consumers     385
12.2 Basic Service Messaging Frameworks     389
Basic Service Message Processing without ESBs     389
Message Routing without an ESB     390
Message Transformation without an ESB     391
Basic Service Message Processing with ESBs     392
Message Routing with an ESB     392
Message Transformation with an ESB     392
12.3 Common ESB Features Relevant to SOA     397
Service Lookup and Invocation     397
Service Processing     399
Service Composition Support      401
REST API Management Support     402
PART IV: APPENDICES
APPENDIX A: Case Study Conclusion     405
A.1 NovoBank     406
A.2 SmartCredit Co.     407
APPENDIX B: Service-Orientation Principles Reference     409
APPENDIX C: SOA Design Patterns Reference     425
APPENDIX D: The Annotated SOA Manifesto     519
About the Authors     533
About the Foreword Contributor     535
About the Contributors     537
Index     539

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