Java EE 7 Essentials: Enterprise Developer Handbook

362 Pages·2013·18.28 MB·English

by  Arun Gupta

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Java EE 7 Essentials
Arun Gupta
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Java EE 7 Essentials
by Arun Gupta
Copyright © 2013 Arun Gupta. All rights reserved.
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August 2013: First Edition
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2013-08-08: First release
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ISBN: 978-1-449-37017-6
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Table of Contents
Foreword. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xi
Preface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xiii
1. Java Platform, Enterprise Edition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Introduction 1
Deliverables 3
What’s New in Java EE 7 6
2. Servlets. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
WebServlet 11
Servlet Filters 16
Event Listeners 17
Asynchronous Support 20
Nonblocking I/O 22
Web Fragments 24
Security 25
Resource Packaging 28
Error Mapping 29
Handling Multipart Requests 30
Upgrade Processing 31
3. JavaServer Faces. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Facelets 34
Resource Handling 37
Composite Components 38
Request Processing Life-Cycle Phases 41
Ajax 43
HTTP GET 46
Server and Client Extension Points 47
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Validating Data 50
Navigation Rules 51
Faces Flow 51
Resource Library Contracts 57
Passthrough Attributes and HTML5-Friendly Markup 59
Component Tags 60
4. RESTful Web Services. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Resources 73
Binding HTTP Methods 77
Multiple Resource Representations 79
Binding a Request to a Resource 81
Entity Providers 82
Client API 84
Mapping Exceptions 87
Filters and Entity Interceptors 88
Validation of Resources 94
5. SOAP-Based Web Services. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
Web Service Endpoints 98
Provider-Based Dynamic Endpoints 101
Endpoint-Based Endpoints 102
Web Service Client 103
Dispatch-Based Dynamic Client 105
Handlers 107
6. JSON Processing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Streaming API 112
Consuming JSON Using the Streaming API 112
Producing JSON Using the Streaming API 114
Object Model API 116
Consuming JSON Using the Object Model API 116
Producing JSON Using the Object Model API 117
7. WebSocket. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
Annotated Server Endpoint 122
Programmatic Server Endpoint 128
Annotated Client Endpoint 132
Programmatic Client Endpoint 135
JavaScript WebSocket Client 137
Encoders and Decoders 138
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Integration with Java EE Security 142
8. Enterprise JavaBeans. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
Stateful Session Beans 145
Stateless Session Beans 148
Singleton Session Beans 150
Life-Cycle Event Callbacks 151
Message-Driven Beans 154
Portable Global JNDI Names 156
Transactions 157
Asynchronous Invocation 159
Timers 160
Embeddable API 164
EJB Lite 165
9. Contexts and Dependency Injection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167
Discovery of Beans 167
Injection Points 170
Qualifier and Alternative 171
Producer and Disposer 173
Interceptors 174
Decorators 178
Scopes and Contexts 179
Stereotypes 181
Events 182
Portable Extensions 183
Built-in Beans 185
Life-Cycle Callbacks 186
10. Concurrency Utilities. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189
Asynchronous Tasks 189
Schedule Tasks 194
Managed Threads 197
Dynamic Contextual Objects 198
11. Bean Validation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203
Built-in Constraints 203
Defining a Custom Constraint 207
Validation Groups 210
Method and Constructor Constraint 212
12. Java Transaction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215
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User-Managed Transactions 215
Container-Managed Transactions 216
@TransactionScoped 218
13. Java Persistence. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219
Entities 219
Persistence Unit, Persistence Context, and Entity Manager 222
Schema Generation 226
Create, Read, Update, and Delete Entities 229
Entity Listeners 232
Stored Procedures 235
Validating the Entities 237
Transactions and Locking 239
Caching 241
14. Java Message Service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 245
Sending a Message 247
Receiving a Message Synchronously 251
Receiving a Message Asynchronously 253
Quality of Service 254
Temporary Destinations 255
15. Batch Processing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 257
Chunk-Oriented Processing 258
Custom Checkpointing 263
Exception Handling 264
Batchlet Processing 265
Listeners 266
Job Sequence 267
Flow 268
Split 269
Decision 269
Partitioning the Job 271
16. Build an End-to-End Application. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 275
Introduction 275
Software Requirements 275
Problem Statement 276
Lab Flow 277
Walkthrough of a Sample Application 278
Show Booking (JavaServer Faces) 283
Chat Room (Java API for WebSocket) 292
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