Java 2EE and XML development

Geared toward experienced developers, this reference demonstrates how Java 2 Platform, Enterprise Edition (J2EE), and XML technologies can be used together to create more robust distributed applications and software systems. The use of XML technology to extend and enhance the capabilities of the J2EE platform is covered in detail. Discussed are J2EE and XML integration at each layer of an n-tier distributed application model. Design patterns, tradeoffs, and decision criteria are provided in terms of individual XML and J2EE technology combinations. Hot topics in application integration are also covered, including Web services, architectures, and business partner integration. Cover......Page 1 reviews......Page 2 Title page......Page 3 Contents......Page 7 preface......Page 11 acknowledgments......Page 12 about this book......Page 13 about the authors......Page 18 about the cover illustration......Page 19 author online......Page 21 1. Getting started......Page 23 1.1 Distributed systems overview......Page 24 1.1.1 Distributed systems concepts......Page 25 1.1.2 N-tier application architecture......Page 34 1.1.3 Overcoming common challenges......Page 36 1.2.1 J2EE and development methodologies......Page 44 1.2.2 J2EE development tools......Page 46 1.3.1 Testing J2EE applications......Page 51 1.3.2 Deploying J2EE applications......Page 55 1.4 Summary......Page 57 2. XML and Java......Page 59 2.1 XML and its uses......Page 60 2.1.1 XML validation technologies......Page 63 2.1.2 XML parsing technologies......Page 66 2.1.3 XML translation technologies......Page 68 2.1.4 Messaging technologies......Page 70 2.1.5 Data manipulation and retrieval technologies......Page 73 2.1.6 Data storage technologies......Page 76 2.2 The Java APIs for XML......Page 77 2.2.1 JAXP......Page 79 2.2.2 JDOM......Page 88 2.2.3 JAXB......Page 91 2.2.4 Long Term JavaBeans Persistence......Page 96 2.2.5 JAXM......Page 98 2.2.6 JAX-RPC......Page 99 2.3 Summary......Page 100 3. Application development......Page 103 3.1 XML component interfaces......Page 104 3.1.1 Using value objects......Page 106 3.1.2 Implementing XML value objects......Page 109 3.1.3 When not to use XML interfaces......Page 117 3.2 XML and persistent data......Page 118 3.2.1 Querying XML data......Page 119 3.2.2 Storing XML data......Page 125 3.3 Summary......Page 132 4. Application integration......Page 135 4.1.1 Traditional approaches to systems integration......Page 136 4.1.2 XML-based systems integration......Page 144 4.3 J2EE and SOAP......Page 147 4.3.1 Creating a simple SOAP message......Page 148 4.3.2 Using SOAP with Attachments......Page 151 4.3.3 Using JAXM for SOAP Messaging......Page 153 4.4 Building web services in J2EE......Page 160 4.4.1 What is a web service?......Page 161 4.4.2 Providing web services in J2EE......Page 162 4.4.3 Implementing our example web services......Page 164 4.4.5 J2EE web services and Microsoft .NET......Page 175 4.5 Summary......Page 176 5. User interface development......Page 179 5.1 Creating a thin-client user interface......Page 180 5.1.2 Serving multiple locales......Page 181 5.1.3 An example to work through......Page 182 5.2 The pure J2EE approach......Page 184 5.2.1 The J2EE presentation tool kit......Page 185 5.2.2 Issues in J2EE MVC architecture......Page 186 5.2.3 Building our example in J2EE......Page 188 5.3.1 Adding XSLT to the web process flow......Page 199 5.3.2 Analyzing the results......Page 207 5.3.3 Extending to binary formats......Page 208 5.4 XML web publishing frameworks......Page 217 5.4.1 Introduction to Cocoon architecture......Page 218 5.4.2 Using Cocoon to render the watch list page......Page 219 5.4.3 Analyzing the results......Page 222 5.6 Summary......Page 223 6. Case study......Page 225 6.1 Case study requirements......Page 226 6.2 The application environment......Page 228 6.3.1 Services and data layer analysis......Page 229 6.3.3 Other necessary components......Page 230 6.4.1 Designing the application logic layer......Page 232 6.4.2 Designing the user interface......Page 234 6.5 Validating our design......Page 235 6.6.1 Building the controller servlet......Page 237 6.6.2 Building the ApplicationMenu component......Page 239 6.6.3 Building the ComponentLocator......Page 240 6.6.4 Building the BugAccessorBean......Page 243 6.6.5 Building the XSLTFilter......Page 245 6.7 Structuring application data......Page 246 6.8 The Amaya web service......Page 247 6.9.1 Installation......Page 251 6.9.2 Viewing the main menu......Page 252 6.9.4 Viewing and updating the Amaya problem list......Page 253 6.9.5 Inspecting the web services SOAP messages......Page 254 6.10 Summary......Page 255 A. Design patterns for J2EE and XML......Page 257 A.1.1 The Decorating Filter pattern......Page 258 A.1.2 The Model-View-Controller pattern......Page 259 A.2.1 The Service Locator pattern......Page 261 A.2.3 The Value Object pattern......Page 262 A.2.4 The Data Access Object pattern......Page 263 B. Distributed application security......Page 265 B.2.1 Authentication models......Page 266 B.2.3 Distributed security contexts......Page 267 B.3.2 Asymmetrical cryptography......Page 268 B.3.3 Tradeoffs and common implementations......Page 269 C. The Ant build tool......Page 271 C.1 Installing and configuring Ant......Page 276 C.2 Creating a build file......Page 277 C.2.1 Dynamically constructed paths and file sets......Page 278 C.2.2 A Sample build file......Page 279 C.3.1 Developing the task......Page 283 C.3.3 Integrating the task......Page 284 C.4.1 Developing the listener......Page 285 C.5 Summary......Page 286 resources......Page 287 A, B, C, D......Page 291 E, F, H, I, J......Page 292 L, M......Page 293 N, O, P, R, S......Page 294 T, U, V, W, X......Page 295 Cover 1 reviews 2 Title page 3 Contents 7 front material 11 preface 11 acknowledgments 12 about this book 13 about the authors 18 about the cover illustration 19 author online 21 1. Getting started 23 1.1 Distributed systems overview 24 1.1.1 Distributed systems concepts 25 1.1.2 N-tier application architecture 34 1.1.3 Overcoming common challenges 36 1.2 The J2EE development process 44 1.2.1 J2EE and development methodologies 44 1.2.2 J2EE development tools 46 1.3 Testing and deployment in J2EE 51 1.3.1 Testing J2EE applications 51 1.3.2 Deploying J2EE applications 55 1.4 Summary 57 2. XML and Java 59 2.1 XML and its uses 60 2.1.1 XML validation technologies 63 2.1.2 XML parsing technologies 66 2.1.3 XML translation technologies 68 2.1.4 Messaging technologies 70 2.1.5 Data manipulation and retrieval technologies 73 2.1.6 Data storage technologies 76 2.2 The Java APIs for XML 77 2.2.1 JAXP 79 2.2.2 JDOM 88 2.2.3 JAXB 91 2.2.4 Long Term JavaBeans Persistence 96 2.2.5 JAXM 98 2.2.6 JAX-RPC 99 2.2.7 JAXR 100 2.3 Summary 100 3. Application development 103 3.1 XML component interfaces 104 3.1.1 Using value objects 106 3.1.2 Implementing XML value objects 109 3.1.3 When not to use XML interfaces 117 3.2 XML and persistent data 118 3.2.1 Querying XML data 119 3.2.2 Storing XML data 125 3.2.3 When not to use XML persistence 132 3.3 Summary 132 4. Application integration 135 4.1 Integrating J2EE applications 136 4.1.1 Traditional approaches to systems integration 136 4.1.2 XML-based systems integration 144 4.2 A web services scenario 147 4.3 J2EE and SOAP 147 4.3.1 Creating a simple SOAP message 148 4.3.2 Using SOAP with Attachments 151 4.3.3 Using JAXM for SOAP Messaging 153 4.4 Building web services in J2EE 160 4.4.1 What is a web service? 161 4.4.2 Providing web services in J2EE 162 4.4.3 Implementing our example web services 164 4.4.4 Consuming web services in J2EE 175 4.4.5 J2EE web services and Microsoft .NET 175 4.5 Summary 176 5. User interface development 179 5.1 Creating a thin-client user interface 180 5.1.1 Serving different types of devices 181 5.1.2 Serving multiple locales 181 5.1.3 An example to work through 182 5.2 The pure J2EE approach 184 5.2.1 The J2EE presentation tool kit 185 5.2.2 Issues in J2EE MVC architecture 186 5.2.3 Building our example in J2EE 188 5.2.4 Analyzing the results 199 5.3 The J2EE/XML approach 199 5.3.1 Adding XSLT to the web process flow 199 5.3.2 Analyzing the results 207 5.3.3 Extending to binary formats 208 5.4 XML web publishing frameworks 217 5.4.1 Introduction to Cocoon architecture 218 5.4.2 Using Cocoon to render the watch list page 219 5.4.3 Analyzing the results 222 5.5 A word about client-side XSLT 223 5.6 Summary 223 6. Case study 225 6.1 Case study requirements 226 6.2 The application environment 228 6.3 The analysis phase 229 6.3.1 Services and data layer analysis 229 6.3.2 Data storage analysis 230 6.3.3 Other necessary components 230 6.4 The design phase 232 6.4.1 Designing the application logic layer 232 6.4.2 Designing the user interface 234 6.5 Validating our design 235 6.6 The implementation phase 237 6.6.1 Building the controller servlet 237 6.6.2 Building the ApplicationMenu component 239 6.6.3 Building the ComponentLocator 240 6.6.4 Building the BugAccessorBean 243 6.6.5 Building the XSLTFilter 245 6.7 Structuring application data 246 6.8 The Amaya web service 247 6.9 Running the application 251 6.9.1 Installation 251 6.9.2 Viewing the main menu 252 6.9.3 Viewing common system problems 253 6.9.4 Viewing and updating the Amaya problem list 253 6.9.5 Inspecting the web services SOAP messages 254 6.10 Summary 255 Appendices 257 A. Design patterns for J2EE and XML 257 A.1 Presentation layer patterns 258 A.1.1 The Decorating Filter pattern 258 A.1.2 The Model-View-Controller pattern 259 A.2 Application- and service-layer patterns 261 A.2.1 The Service Locator pattern 261 A.2.2 The Business Delegate pattern 262 A.2.3 The Value Object pattern 262 A.2.4 The Data Access Object pattern 263 B. Distributed application security 265 B.1 Securing distributed communication channels 266 B.2 Securing application components 266 B.2.1 Authentication models 266 B.2.2 Authorization models 267 B.2.3 Distributed security contexts 267 B.3 Using cryptography and shared secrets 268 B.3.1 Symmetrical cryptography 268 B.3.2 Asymmetrical cryptography 268 B.3.3 Tradeoffs and common implementations 269 C. The Ant build tool 271 C.1 Installing and configuring Ant 276 C.2 Creating a build file 277 C.2.1 Dynamically constructed paths and file sets 278 C.2.2 A Sample build file 279 C.3 Custom tasks 283 C.3.1 Developing the task 283 C.3.2 Defining the task 284 C.3.3 Integrating the task 284 C.4 Build listeners 285 C.4.1 Developing the listener 285 C.4.2 Using the listener 286 C.5 Summary 286 resources 287 Index 291 A, B, C, D 291 E, F, H, I, J 292 L, M 293 N, O, P, R, S 294 T, U, V, W, X 295 A guide to using J2EE and XML technologies together to create more robust distributed applications and software systems. The book also covers topics in application integration such as web services architectures and business partner integration. Explains why and how to use XML to build J2EE applications, explores recent developments in Java and XML technology, and discusses the trade-offs of building a J2EE application with XML rather than with only J2EE.