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Chapter 1. WAF Overview 3
1.1.1.1. Presentation Layer
The Presentation Layer is responsible for presenting information to the end user. The presentation
layer accepts processed, structured data from the domain layer and is responsible for styling the data
appropriately and delivering the content in a format appropriate for the end user.
1.1.1.2. Domain Layer
The Domain Layer contains Domain Objects, which are abstractions of entities that exist in the busi-
ness domain, for example, Party, Person, Group, Company, Department, Team, Product, Order, Line
Item.
1.1.1.3. Data Layer
The Data Layer contains two very important components:
Data Objects
Provide read and/or write access to the persistent properties of Domain Objects.
Persistence Metadata
Describes a Domain Object e.g., its name, its properties, and how each property is mapped into
the Data Storage layer. This description is written using the Persistence Definition Language
(PDL) format. PDL was designed to be used specifically in WAF. PDL is discussed in more
detail in Section 2.3 Persistence Definition Language (PDL).
1.1.1.4. Data Storage Layer
The data storage layer Contains the mechanism(s) employed for storing data persistently. This is
typically a relational database (RDBMS) such as Oracle9i™ database or PostgreSQL, combined with
a data model. It may also include other mechanisms, such as an LDAP directory or filesystem.
1.2. Features
In his seminal book Analysis Patterns, Martin Fowler writes that a framework “... should be applicable
across a large domain and be based on an effective conceptual model of that domain” (p. 11). Accord-
ingly, the Web Application Framework defines a set of Domain Objects that are encountered in the
problem domain of most WAF applications. This object model further subdivides into two categories:
kernel and services.
In addition to kernel and services, WAF includes other features that facilitate building database-backed
web applications: infrastructure, persistence, presentation, and web.
1.2.1. Kernel
The kernel provides all the business logic provided by WAF, namely, business logic that is essen-
tial to building a web applications. Kernel provides domain objects that represent users, groups, and
permissions.
- Red Hat Web Application 1
- Framework 6.1 1
- WAF Developer Guide 1
- Table of Contents 3
- 2. Document Conventions 7
- Mail backupfiles mail reports 8
- first term 11
- I. WAF Concepts 13
- Chapter 1 15
- WAF Overview 15
- 1.1. General Architecture 16
- 1.2. Features 17
- 1.2.2. Services 18
- • Domain logic 19
- 1.3. Applications 20
- Chapter 1. WAF Overview 7 21
- 8 Chapter 1. WAF Overview 22
- Chapter 2 23
- WAF Component: Persistence 23
- BaseServlet 24
- Chapter 3 25
- WAF Component: Kernel 25
- 3.4. Kernel Resources 26
- Chapter 4 27
- WAF Component: Services 27
- 4.3. Formbuilder Service 28
- 4.4. Globalization Service 29
- 4.5. Mail Service 30
- 4.6. Messaging Service 30
- 4.7. Notification Service 31
- 4.8. Portal Service 31
- 4.9. Search Service 31
- 4.10. Workflow Service 32
- 4.11. Versioning Service 32
- Chapter 5 33
- WAF Component: Presentation 33
- 5.2. CSS and XSLT 34
- 5.2.2. WAF Templating Package 35
- • ::application:: 36
- • ::url:: - (admin, index) 36
- • ::locale:: - (en_US, en) 36
- Available Patterns 37
- • /index.jsp 38
- • / - { "index" } 38
- 5.3. JavaServer Pages (JSP) 39
- 5.4.1. Working With Bebop 40
- Page on each request 43
- /define:radioGroup 44
- Chapter 6 45
- WAF Component: Web 45
- 6.3. Dispatcher 46
- II. Equipping Developers 47
- Chapter 7 49
- Developing with WAF 49
- 7.3. Developer Support 50
- /ds/ on your 51
- 7.4.1. Installing Eclipse 52
- • $RESIN_HOME/lib/resin.jar 53
- • Connect Tab 56
- • Source Tab 56
- • Common Tab 56
- 7.5.1. Log4J 57
- 7.5.4. Custom Appenders 61
- Chapter 8 63
- 8.4. Build Tools 64
- 8.6. Persistent Object Types 65
- 8.7. Java Domain Objects 66
- 8.9. Creating a Web Interface 72
- Chapter 9 77
- Persistence Tutorial 77
- 9.3. Associations 84
- 9.3.2. Composite Associations 85
- 9.3.3. Role References 86
- 9.3.4. Link Attributes 86
- 9.4. Named SQL Events 88
- 9.4.2. Data Operations 90
- 9.5.1. Filtering 94
- 9.5.2. Ordering 99
- 9.5.3. Binding Parameters 100
- 9.6. Common Mistakes 102
- 9.6.5. Join Paths 103
- 9.6.6. Dynamic DDL Generation 103
- 9.7. Transaction Management 104
- 9.8. Link Attributes 106
- 9.8.2. Link Attributes API 107
- 9.9. Dynamic Object Types 110
- 9.9.2. Dynamic Associations 111
- • For each attribute: 113
- Chapter 10 117
- Kernel Tutorial 117
- 10.1.2. Revoking Access 118
- 10.1.3. Basic Access Check 118
- 10.1.4. Allowed Targets Check 119
- 10.2. Domain Objects Tutorial 120
- DomainObject or its 122
- 10.2.2. Conventions 129
- 10.2.3. Examples 129
- 10.3. Security Service FAQ 132
- • Replace certain modules 136
- Chapter 11 137
- Services Tutorials 137
- 11.1.2. Classes 139
- 11.2.2. Deleting a Category 142
- 11.3. Notification Tutorial 146
- 11.3.4. Email Alerts 148
- 11.4. Workflow Tutorial 149
- 11.5. Versioning Tutorial 152
- 11.5.2. Fully versioned types 153
- 11.5.3. Recoverable types 154
- 11.5.5. PDL Syntax 155
- 11.6. Search Tutorial 160
- • QueryComponent.java 164
- • BaseQueryComponent.java 164
- • ResultsPane.java 164
- • FilterComponent.java 164
- Chapter 12 167
- Presentation (Bebop) Tutorial 167
- 12.3. Site-Wide Master Pages 169
- 12.4. Varying a Shared Layout 172
- 12.6. UI Tutorial 174
- Chapter 13 179
- Web Applications Tutorial 179
- 13.4. Accessing Resources 181
- 13.5. Globalization and Bebop 183
- 13.6. Localizing Stylesheets 184
- 13.7. Sending Mail Messages 184
- Chapter 14 187
- References 187
- 174 Chapter 14. References 188
- III. Appendixes 189
- Appendix A 191
- Bebop Tag Library Reference 191
- Appendix B 195
- PL/SQL Standards 195
- B.3. Coding Style 197
- B.4.3. Naming primary keys 198
- B.4.5. Upgrade Scripts 199
- - new-version-name .sql 200
- Appendix C 201
- Java Standards 201
- Appendix D 203
- PDL Syntax 203
- 190 Appendix D. PDL Syntax 204
- D.2. PDL Reserved Words 205
- D.2.2. PDL Attribute Types 208
- Appendix D. PDL Syntax 195 209
- 196 Appendix D. PDL Syntax 210
- Appendix D. PDL Syntax 197 211
- 198 Appendix D. PDL Syntax 212
- Appendix D. PDL Syntax 199 213
- 200 Appendix D. PDL Syntax 214
- Appendix D. PDL Syntax 201 215
- 202 Appendix D. PDL Syntax 216
- Persistence Glossary 217
- Persistence Glossary 207 221
- UML Class 221
- 208 Persistence Glossary 222
- Colophon 229
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