Sun Certified Enterprise Architect for Java EE Study Guide (2nd Revised edition)

Sun Certified Enterprise Architect for Java EE Study Guide (2nd Revised edition)

By: Mark Cade (author), Humphrey Sheil (author)Paperback

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Description

Definitive, Comprehensive SCEA Exam Prep-Straight from Sun's Exam Developers! This book delivers complete, focused review for Sun's new Sun Certified Enterprise Architect (SCEA) for Java EE certification exam-straight from two of the exam's creators! SCEA lead developer/assessor Mark Cade and SCEA lead developer/assessor Humphrey Sheil offer powerful insights, real-world architectural case studies, and challenging sample questions that systematically prepare you for the actual exam. For every question, the authors show why the right answers are right-and why the other answers are wrong. Cade and Sheil cover every SCEA exam topic, skill, and technique, including: *Understanding system architecture and its goals*Decomposing larger systems into components organized by tiers or layers*Addressing requirements for scalability, maintainability, reliability, availability, extensibility, performance, and security*Building effective web (presentation) tiers, and analyzing tradeoffs associated with using web frameworks*Leveraging EJB 3's enhancements for business tier development*Covering new enhancements in the JEE 5 platform*Choosing and architecting the best integration and messaging components for your system*Using the Java security model to enforce confidentiality, integrity, authorization, authentication, and non-repudiation*Using the most powerful and useful Java EE architecture patterns*Documenting Java EE architectures through visual models and narratives The authors also present detailed guidance for handling every element of the SCEA exam-including your development and defense of a complete real-world architectural solution.

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About Author

Mark Cade is a lead developer and assessor of the SCEA exam covered in this book. He worked at the Sun Microsystems Java Center as a Senior Java Architect, where he has extensive experience creating architectures for Java EE solutions for Fortune 500 companies. He has more than 20 years of experience as a software engineer. Humphrey Sheil is a lead developer and assessor for the SCEA exam covered in this book. With a background specializing in enterprise architecture and integration in the United States and Europe, he holds a M.Sc. and B.Sc. in Computer Science from University College Dublin. He is currently the CTO at Comtec Group.

Contents

Acknowledgments ... xv About the Authors ... xvii Chapter 1 What Is Architecture? ... 1 Introduction ... 1 Prerequisite Review ... 1 Discussion ... 2 Understanding Architecture ... 2 Role of the Architect ... 5 More Detail on the Exam Itself ... 6 Part I: Multiple Choice ... 7 Part II: Solving the Business Problem ... 8 Part III: Defending Your Solution ... 9 Preparing for the Exam ... 10 Preparing for Part I ... 10 Preparing for Part II ... 11 Preparing for Part III ... 11 Essential Points ... 11 Review Your Progress ... 11 Chapter 2 Architecture Decomposition ... 13 Introduction ... 13 Prerequisite Review ... 14 Discussion ... 14 Decomposition Strategies ... 14 Layering ... 15 Distribution ... 15 Exposure ... 16 Functionality ... 16 Generality ... 16 Coupling and Cohesion ... 16 Volatility ... 16 Configuration ... 16 Planning and Tracking ... 17 Work Assignment ... 17 Tiers ... 17 Client ... 17 Web ... 18 Business ... 18 Integration ... 18 Resource ... 18 Layers ...18 Application ... 19 Virtual Platform (Component APIs) ... 19 Application Infrastructure (Containers) ... 19 Enterprise Services (OS and Virtualization) ... 19 Compute and Storage ... 19 Networking Infrastructure ... 20 Service-Level Requirements ... 20 Performance ... 20 Scalability ... 20 Reliability ... 21 Availability ... 21 Extensibility ... 22 Maintainability ... 22 Manageability ... 22 Security ... 22 Impact of Dimensions on Service-Level Requirements ... 23 Capacity ... 23 Redundancy ... 23 Modularity ... 23 Tolerance ... 24 Workload ... 24 Heterogeneity ... 24 Common Practices for Improving Service-Level Requirements ... 24 Introducing Redundancy to the System Architecture ... 24 Improving Performance ... 27 Improving Availability ... 28 Improving Extensibility ... 29 Improving Scalability ... 30 Tiers in Architecture ... 30 Two-Tier Systems ... 31 Advantages ... 31 Disadvantages ... 31 Three- and Multi-Tier Systems ... 31 Advantages ... 32 Disadvantages ... 32 Essential Points ... 32 Review Your Progress ... 33 Chapter 3 Web Tier Technologies ... 35 Introduction ... 35 Prerequisite Review ... 36 Model View Controller (MVC) ... 36 Web Container ... 36 Servlets ... 37 Filters ... 38 Listeners ... 39 JavaServer Pages (JSP) ... 39 Java Standard Tag Library (JSTL) ... 40 Unified Expression Language (EL) ... 40 Managing Sessions ... 40 JavaServer Faces (JSF) ... 41 Templating Frameworks ... 41 Web Frameworks ... 42 Discussion ... 42 JSPs and Servlets-Standard Uses ... 42 JSF-Standard Uses ... 43 Web-Centric Implementations ... 43 EJB-Centric Implementations ... 44 Rationale for Choosing Between EJB-Centric and Web-Centric Implementations ... 45 The Future of Client-Server Communication ... 46 Essential Points ... 46 Review Your Progress ... 47 Chapter 4 Business Tier Technologies ... 51 Introduction ... 51 Prerequisite Review ... 52 EnterpriseJava Bean ... 53 Session Bean ... 54 Stateless Session Bean ... 54 Stateful Session Bean ... 55 Entity Beans ... 56 CMP Entity Bean ... 56 BMP Entity Bean ... 57 Entity Class ... 57 Persistence Strategies ... 58 Message-Driven Bean ... 58 Discussion ... 59 EJB Advantages and Disadvantages ... 59 Scalability ... 59 Security ... 60 Contrasting Persistence Strategies ... 60 Ease of Development ... 60 Performance ... 60 Extensibility ... 61 EJB and Web Services ... 61 EJBs as Web Service End Points ... 61 EJBs Consuming Web Services ... 61 Advantages and Disadvantages ... 62 EJB 3 ... 62 Ease of Development ... 63 Container in EJB 3 ... 63 JPA in EJB 3 ... 63 Essential Points ... 64 Review Your Progress ... 65 Chapter 5 Integration and Messaging ... 69 Introduction ... 69 Prerequisite Review ... 70 Web Services ... 71 SOAP ... 71 WSDL ... 72 JAX-RPC ... 72 JAX-WS ... 72 JAXB ... 72 JAXR ... 73 JMS ... 73 JCA ... 74 Discussion ... 75 Java to Java Integration ... 75 Java Messaging Service (JMS) ... 76 Java to Non-Java Integration ... 76 Web Services ... 76 Java Connector Architecture (JCA) ... 77 Essential Points ... 78 Review Your Progress ... 78 Chapter 6 Security ... 83 Introduction ... 83 Prerequisite Review ... 84 JRE ... 85 JAAS ... 85 Credential ... 85 Principal ... 86 Authentication ... 86 Authorization ... 86 Discussion ... 86 Client-Side Security ... 87 Server-Side Security ... 88 EJB Container ... 88 Web Container ... 88 Putting the EJB Container and Web Container Together ... 89 Web Service Security ... 90 How Security Behavior Is Defined ... 91 Declarative Security ... 91 Programmatic Security ... 92 Commonly Encountered Security Threats ... 93 Defining a Security Model ... 94 Essential Points ... 95 Review Your Progress ... 95 Chapter 7 Applying Patterns ... 99 Introduction ... 99 Prerequisite Review ... 100 Discussion ... 101 Creational Patterns ... 101 Abstract Factory Pattern ... 101 Builder Pattern ... 103 Factory Method Pattern ... 104 Prototype Pattern ... 105 Singleton Pattern ... 106 Structural Patterns ... 107 Adapter Pattern ... 107 Bridge Pattern ... 108 Composite Pattern ... 109 Decorator Pattern ... 111 Facade Pattern ... 112 Flyweight Pattern ... 113 Proxy Pattern ... 114 Behavioral Patterns ... 115 Chain of Responsibility Pattern ... 115 Command Pattern ... 116 Interpreter Pattern ... 117 Iterator Pattern ... 118 Mediator Pattern ... 119 Memento Pattern ... 120 Observer Pattern ... 121 State Pattern ... 122 Strategy Pattern ... 123 Template Method Pattern ... 124 Visitor Pattern ... 125 Core Java EE Patterns ... 126 Presentation Tier ... 126 Intercepting Filter ... 126 Context Object ... 127 Front Controller ... 128 Application Controller ... 129 View Helper ... 129 Composite View ... 130 Dispatcher View ... 131 Service to Worker ... 132 Business Tier ... 132 Business Delegate ... 133 Service Locator ... 133 Session Facade ... 134 Application Service ... 135 Business Object ... 136 Composite Entity ... 136 Transfer Object ... 137 Transfer Object Assembler ... 138 Value List Handler ... 139 Integration Tier ... 139 Data Access Object ... 140 Service Activator ... 140 Domain Store ... 141 Web Service Broker ... 142 Essential Points ... 143 Review Your Progress ... 146 Chapter 8 Documenting an Architecture ... 149 Introduction ... 149 Prerequisite Review ... 149 Discussion ... 150 Building Blocks of UML ... 150 Elements ... 151 Structural Elements ... 151 Behavioral Elements ... 152 Grouping Element ... 153 Annotational Elements ... 153 Relationships ... 154 Common Mechanisms ... 155 Specifications ... 155 Adornments ... 155 Common Divisions ... 156 Extensibility Mechanisms ... 156 UML Diagrams ... 157 Structure Diagrams ... 157 Class Diagram ... 157 Component Diagram ... 157 Deployment Diagram ... 159 Package Diagram ... 159 Behavior Diagrams ... 160 Activity Diagram ... 160 Statechart Diagram ... 161 Use-Case Diagram ... 162 Interaction Diagrams ... 163 Essential Points ... 164 Review Your Progress ... 164 Chapter 9 Tackling Parts II and III ... 167 Introduction ... 167 Prerequisite Review ... 167 Discussion ... 168 Scenario ... 168 Worked Solution ... 170 Class Diagram ... 170 Component Diagram ... 173 Deployment Diagram ... 174 Sequence Diagrams ... 176 Comments on Diagrams ... 178 Identified Risks and Mitigations ... 178 Part III-Defending Your Architecture ... 179 Essential Points ... 180 Index ... 181

Product Details

  • publication date: 01/04/2005
  • ISBN13: 9780131482036
  • Format: Paperback
  • Number Of Pages: 216
  • ID: 9780131482036
  • weight: 281
  • ISBN10: 0131482033
  • edition: 2nd Revised edition

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