More Java Pitfalls: 50 New Time-Saving Solutions and Workarounds

@Team LiB......Page 0
Cover......Page 1
Contents......Page 8
Introduction......Page 12
Acknowledgments......Page 18
PART
One  The Client Tier......Page 22
Item 1: When Runtime.exec() Won’t......Page 25
Item 2: NIO Performance and Pitfalls......Page 38
Canonical File Copy......Page 41
Little-Endian Byte Operations......Page 42
Non-Blocking Server IO......Page 47
Item 3: I Prefer Not to Use Properties......Page 55
Item 4: When Information Hiding Hides Too Much......Page 60
Item 5: Avoiding Granularity
Pitfalls in java.util.logging......Page 65
Item 6: When Implementations of
Standard APIs Collide......Page 74
How to Use Assertions......Page 80
Item 8: The Wrong Way to Search a DOM......Page 87
Item 9: The Saving-a-DOM Dilemma......Page 94
Item 10: Mouse Button Portability......Page 101
Item 11: Apache Ant and Lifecycle Management......Page 109
Item 12: JUnit: Unit Testing Made Simple......Page 121
Item 13: The Failure to Execute......Page 129
Deploying Java Applications......Page 130
The Java Extension Mechanism......Page 131
Sealed Packages......Page 132
Item 14: What Do You Collect?......Page 133
Item 15: Avoiding Singleton Pitfalls......Page 138
When Multiple Singletons in Your VM Happen......Page 140
When Singletons are Used as Global Variables,
or Become Non-Singletons......Page 141
Item 16: When setSize() Won’t Work......Page 143
Connecting via HTTP with the java.net Classes......Page 147
An Alternative Open Source HTTP Client......Page 158
Item 18: Effective String Tokenizing......Page 161
Item 19: JLayered Pane Pitfalls......Page 167
Item 20: When File.renameTo() Won’t......Page 172
Item 21: Use Iteration over Enumeration......Page 178
Item 22: J2ME Performance and Pitfalls......Page 183
PART
Two  The Web Tier......Page 220
Item 23: Cache, It’s Money......Page 221
Request/Response Paradigm......Page 229
Maintaining State......Page 230
JSP the Old Way......Page 231
JSP Development with Beans (Model 1 Architecture)......Page 235
Item 25: When Servlet HttpSessions Collide......Page 241
Item 26: When Applets Go Bad......Page 248
Item 27: Transactional LDAP—Don’t
Make that Commitment......Page 256
Item 28: Problems with Filters......Page 265
Item 29: Some Direction about
JSP Reuse and Content Delivery......Page 276
Item 30: Form Validation Using Regular Expressions......Page 282
Item 31: Instance Variables in Servlets......Page 290
Item 32: Design Flaws with Creating Database
Connections within Servlets......Page 300
Item 33: Attempting to Use Both Output
Mechanisms in Servlets......Page 312
Item 34: The Mysterious File Protocol......Page 318
Item 35: Reading Files from Servlets......Page 323
Web Application Deployment Descriptors......Page 329
Item 36: Too Many Submits......Page 333
Preventing Multiple Submits......Page 335
Handling Multiple Submits......Page 337
PART
Three  The Enterprise Tier......Page 348
Item 37: J2EE Architecture Considerations......Page 350
Item 38: Design Strategies for Eliminating
Network Bottleneck Pitfalls......Page 356
General Design Considerations......Page 357
EJB Design Considerations......Page 361
Item 39: I’ll Take the Local......Page 362
Item 40: Image Obsession......Page 369
Item 41: The Problem with Multiple
Concurrent Result Sets......Page 374
A Simple Scenario......Page 380
A “Client Control” Approach......Page 381
The Singleton Approach......Page 383
Database Autogeneration Approaches......Page 384
Other Approaches......Page 385
Item 43: The Stateful Stateless Session Bean......Page 386
Entity Bean......Page 387
Stateless Session Bean......Page 389
Item 44: The Unprepared PreparedStatement......Page 393
Item 45: Take a Dip in the Resource Pool......Page 399
Item 46: JDO and Data Persistence......Page 406
Item 47: Where’s the WSDL? Pitfalls of
Using JAXR with UDDI......Page 419
Where’s the WSDL?......Page 425
Item 48: Performance Pitfalls in
JAX-RPC Application Clients......Page 438
Example Web Service......Page 439
A Simple Client That Uses Precompiled Stub Classes......Page 441
A Client That Uses Dynamic Proxies for Access......Page 442
Two Clients Using the Dynamic Invocation Interface (DII)......Page 444
Performance Results......Page 448
Conclusion......Page 449
Item 49: Get Your Beans Off My Filesystem!......Page 450
Item 50: When Transactions Go Awry, or Consistent
State in Stateful Session EJBs......Page 454
The Memento Pattern......Page 459
Index......Page 464