Contents Resource Factories 259 Environment Properties 262 Understanding
Contents Resource Factories 259 Environment Properties 262 Understanding Handles 263 Home Handles 264 Summary 265 Part Three Advanced Enterprise JavaBeans Concepts 267 Chapter 11 EJB Best Practices 269 When to Use EJB 270 How to Choose a Web Application Framework to Work with EJB 272 Applying Model Driven Development in EJB Projects 275 Applying Extreme Programming in EJB Projects 277 Testing EJB 279 EJB Unit Testing 279 Use Frameworks for EJB Unit Testing 280 Implementing Client-Side Callback Functionality in EJB 282 JMS 282 Remote Method Invocation 283 Web Service 283 Choosing Between Servlets and Stateless Session Beans as Service Endpoints 284 Considering the Use of Aspect-Oriented Programming Techniques in EJB Projects 284 Aspect-Oriented Programming 285 When to Use AOP in EJB Applications 285 Reflection, Dynamic Proxy, and EJB 287 Deploying EJB Applications to Various Application Servers 288 Debugging EJB 290 Inheritance and Code Reuse in EJB 291 Writing Singletons in EJB 293 When to Use XML with EJB 293 When to Use Messaging Versus RMI-IIOP 294 Summary 297 Chapter 12 Transactions 299 Motivation for Transactions 300 Atomic Operations 300 Network or Machine Failure 301 Multiple Users Sharing Data 302 Benefits of Transactions 303 The ACID Properties 304 Transactional Models 306 Flat Transactions 306 Nested Transactions 308 Other Transactional Models 310 Enlisting in Transactions with Enterprise JavaBeans 310 Underlying Transaction System Abstraction 310 Declarative, Programmatic, and Client-Initiated Transactions 310 Choosing a Transaction Style 314
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