Patterns of Enterprise Application Architecture

<br> <br> Preface. <br> <p> </p> <div style="margin-left: 0.2in;"> Who This Book Is For. </div> <p></p> <p> </p> <div style="margin-left: 0.2in;"> Acknowledgements. </div> <p></p> <p> </p> <div style="margin-left: 0.2in;"> Colophon. </div> <p></p> <br> <br> Introduction. <br> <p> </p> <div style="margin-left: 0.2in;"> Architecture. </div> <p></p> <p> </p> <div style="margin-left: 0.2in;"> Enterprise Applications. </div> <p></p> <p> </p> <div style="margin-left: 0.2in;"> Kinds of Enterprise Application. </div> <p></p> <p> </p> <div style="margin-left: 0.2in;"> Thinking About Performance. </div> <p></p> <p> </p> <div style="margin-left: 0.2in;"> Patterns. </div> <p></p> <p> </p> <div style="margin-left: 0.2in;"> The Structure of the Patterns. </div> <p></p> <p> </p> <div style="margin-left: 0.2in;"> Limitations of These Patterns. </div> <p></p> <p> I. THE NARRATIVES. </p> <div style="margin-left: 0.2in;"> 1. Layering. </div> <br> <p> </p> <div style="margin-left: 0.4in;"> The Evolution of Layers in Enterprise Applications. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> The Three Principal Layers. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Choosing Where to Run Your Layers. </div> <p></p> <div style="margin-left: 0.2in;"> 2. Organizing Domain Logic. </div> <br> <p> </p> <div style="margin-left: 0.4in;"> Making a Choice. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Service Layer. </div> <p></p> <div style="margin-left: 0.2in;"> 3. Mapping to Relational Databases. </div> <br> <p> </p> <div style="margin-left: 0.4in;"> Architectural Patterns. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> The Behavioral Problem. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Reading in Data </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Structural Mapping Patterns. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Mapping Relationships. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Inheritance. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Building the Mapping. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Double Mapping. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Using Metadata. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Database Connections. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Some Miscellaneous Points. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Further Reading. </div> <p></p> <div style="margin-left: 0.2in;"> 4. Web Presentation. </div> <br> <p> </p> <div style="margin-left: 0.4in;"> View Patterns. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Input Controller Patterns. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Further Reading. </div> <p></p> <div style="margin-left: 0.2in;"> 5. Concurrency (by Martin Fowler and David Rice). </div> <br> <p> </p> <div style="margin-left: 0.4in;"> Concurrency Problems. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Execution Contexts. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Isolation and Immutability. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Optimistic and Pessimistic Concurrency Control. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Preventing Inconsistent Reads. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Deadlocks. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Transactions. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> ACID. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Transactional Resources. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Reducing Transaction Isolation for Liveness. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Business and System Transactions. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Patterns for Offline Concurrency Control. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Application Server Concurrency. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Further Reading. </div> <p></p> <div style="margin-left: 0.2in;"> 6. Session State. </div> <br> <p> </p> <div style="margin-left: 0.4in;"> The Value of Statelessness. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Session State. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Ways to Store Session State. </div> <p></p> <div style="margin-left: 0.2in;"> 7. Distribution Strategies. </div> <br> <p> </p> <div style="margin-left: 0.4in;"> The Allure of Distributed Objects. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Remote and Local Interfaces. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Where You Have to Distribute. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Working with the Distribution Boundary. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Interfaces for Distribution. </div> <p></p> <div style="margin-left: 0.2in;"> 8. Putting it all Together. </div> <br> <p> </p> <div style="margin-left: 0.4in;"> Starting With the Domain Layer. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Down to the Data Source. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Data Source for Transaction Script. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Data Source Table Module (125). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Data Source for Domain Model (116). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> The Presentation Layer. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Some Technology-Specific Advice. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Java and J2EE. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> .NET. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Stored Procedures. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Web Services. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Other Layering Schemes. </div> <p></p> <p> II. THE PATTERNS. </p> <div style="margin-left: 0.2in;"> 9. Domain Logic Patterns. </div> <br> <p> </p> <div style="margin-left: 0.4in;"> Transaction Script. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> How It Works. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> When to Use It. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> The Revenue Recognition Problem. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: Revenue Recognition (Java). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Domain Model. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> How It Works. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> When to Use It. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Further Reading. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: Revenue Recognition (Java). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Table Module. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> How It Works. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> When to Use It. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: Revenue Recognition with a Table Module (C#). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Service Layer(by Randy Stafford). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> How It Works. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> When to Use It. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Further Reading. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: Revenue Recognition (Java). </div> <p></p> <div style="margin-left: 0.2in;"> 10. Data Source Architectural Patterns. </div> <br> <p> </p> <div style="margin-left: 0.4in;"> Table Data Gateway. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> How It Works. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> When to Use It. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Further Reading. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: Person Gateway (C#). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: Using ADO.NET Data Sets (C#). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Row Data Gateway. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> How It Works. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> When to Use It. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: A Person Record (Java). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: A Data Holder for a Domain Object (Java). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Active Record. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> How It Works. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> When to Use It. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: A Simple Person (Java). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Data Mapper. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> How It Works. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> When to Use It. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: A Simple Database Mapper (Java). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: Separating the Finders (Java). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: Creating an Empty Object (Java). </div> <p></p> <div style="margin-left: 0.2in;"> 11. Object-Relational Behavioral Patterns. </div> <br> <p> </p> <div style="margin-left: 0.4in;"> Unit of Work. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> How It Works. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> When to Use It. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: Unit of Work with Object Registration (Java) (by David Rice). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Identity Map. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> How It Works. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> When to Use It. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: Methods for an Identity Map (Java). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Lazy Load. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> How It Works. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> When to Use It. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: Lazy Initialization (Java). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: Virtual Proxy (Java). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: Using a Value Holder (Java). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: Using Ghosts (C#). </div> <p></p> <div style="margin-left: 0.2in;"> 12. Object-Relational Structural Patterns. </div> <br> <p> </p> <div style="margin-left: 0.4in;"> Identity Field. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> How It Works. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> When to Use It. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Further Reading. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: Integral Key (C#). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: Using a Key Table (Java). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: Using a Compound Key (Java). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Foreign Key Mapping. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> How It Works. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> When to Use It. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: Single-Valued Reference (Java). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: Multitable Find (Java). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: Collection of References (C#). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Association Table Mapping. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> How It Works. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> When to Use It. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: Employees and Skills (C#). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: Using Direct SQL (Java). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: Using a Single Query for Multiple Employees (Java) (by Matt Foemmel and Martin Fowler). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Dependent Mapping. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> How It Works. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> When to Use It. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: Albums and Tracks (Java). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Embedded Value. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> How It Works. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> When to Use It. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Further Reading. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: Simple Value Object (Java). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Serialized LOB. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> How It Works. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> When to Use It. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: Serializing a Department Hierarchy in XML (Java). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Single Table Inheritance. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> How It Works. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> When to Use It. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: A Single Table for Players (C#). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Loading an Object from the Database. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Class Table Inheritance. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> How It Works. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> When to Use It. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Further Reading. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: Players and Their Kin (C#). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Concrete Table Inheritance. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> How It Works. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> When to Use It. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: Concrete Players (C#). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Inheritance Mappers. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> How It Works. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> When to Use It. </div> <p></p> <div style="margin-left: 0.2in;"> 13. Object-Relational Metadata Mapping Patterns. </div> <br> <p> </p> <div style="margin-left: 0.4in;"> Metadata Mapping. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> How It Works. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> When to Use It. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: Using Metadata and Reflection (Java). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Query Object. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> How It Works. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> When to Use It. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Further Reading. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: A Simple Query Object (Java). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Repository (by Edward Hieatt and Rob Mee). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> How It Works. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> When to Use It. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Further Reading. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: Finding a Person's Dependents (Java). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: Swapping Repository Strategies (Java). </div> <p></p> <div style="margin-left: 0.2in;"> 14. Web Presentation Patterns. </div> <br> <p> </p> <div style="margin-left: 0.4in;"> Model View Controller. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> How It Works. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> When to Use It. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Page Controller. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> How It Works. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> When to Use It. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: Simple Display with a Servlet Controller and a JSP View (Java). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: Using a JSP as a Handler (Java). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: Page Handler with a Code Behind (C#). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Front Controller. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> How It Works. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> When to Use It. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Further Reading. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: Simple Display (Java). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Template View. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> How It Works. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> When to Use It. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: Using a JSP as a View with a Separate Controller (Java). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: ASP.NET Server Page (C#). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Transform View. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> How It Works. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> When to Use It. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: Simple Transform (Java). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Two Step View. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> How It Works. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> When to Use It. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: Two Stage XSLT (XSLT). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: JSP and Custom Tags (Java). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Application Controller. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> How It Works. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> When to Use It. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Further Reading. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: State Model Application Controller (Java). </div> <p></p> <div style="margin-left: 0.2in;"> 15. Distribution Patterns. </div> <br> <p> </p> <div style="margin-left: 0.4in;"> Remote Facade. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> How It Works. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> When to Use It. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: Using a Java Session Bean as a Remote Facade (Java). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: Web Service (C#). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Data Transfer Object. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> How It Works. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> When to Use It. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Further Reading. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: Transferring Information about Albums (Java). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: Serializing Using XML (Java). </div> <p></p> <div style="margin-left: 0.2in;"> 16. Offline Concurrency Patterns. </div> <br> <p> </p> <div style="margin-left: 0.4in;"> Optimistic Offline Lock (by David Rice). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> How It Works. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> When to Use It. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: Domain Layer with Data Mappers (165) (Java). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Pessimistic Offline Lock (by David Rice). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> How It Works. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> When to Use It. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: Simple Lock Manager (Java). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Coarse-Grained Lock (by David Rice and Matt Foemmel). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> How It Works. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> When to Use It. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: Shared Optimistic Offline Lock (416) (Java). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: Shared Pessimistic Offline Lock (426) (Java). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: Root Optimistic Offline Lock (416) (Java). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Implicit Lock (by David Rice). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> How It Works. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> When to Use It. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: Implicit Pessimistic Offline Lock (426) (Java). </div> <p></p> <div style="margin-left: 0.2in;"> 17. Session State Patterns. </div> <br> <p> </p> <div style="margin-left: 0.4in;"> Client Session State. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> How It Works. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> When to Use It. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Server Session State. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> How It Works. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> When to Use It. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Database Session State. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> How It Works. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> When to Use It. </div> <p></p> <div style="margin-left: 0.2in;"> 18. Base Patterns. </div> <br> <p> </p> <div style="margin-left: 0.4in;"> Gateway. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> How It Works. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> When to Use It. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: A Gateway to a Proprietary Messaging Service (Java). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Mapper. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> How It Works. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> When to Use It. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Layer Supertype. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> How It Works. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> When to Use It. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: Domain Object (Java). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Separated Interface. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> How It Works. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> When to Use It. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Registry. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> How It Works. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> When to Use It. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: A Singleton Registry (Java). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: Thread-Safe Registry (Java) (by Matt Foemmel and Martin Fowler). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Value Object. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> How It Works. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> When to Use It. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Money. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> How It Works. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> When to Use It. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: A Money Class (Java) (by Matt Foemmel and Martin Fowler). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Special Case. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> How It Works. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> When to Use It. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Further Reading. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: A Simple Null Object (C#). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Plugin (by David Rice and Matt Foemmel). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> How It Works. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> When to Use It. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: An Id Generator (Java). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Service Stub (by David Rice). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> How It Works. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> When to Use It. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Example: Sales Tax Service (Java). </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> Record Set. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> How It Works. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> When to Use It. </div> <p></p> <p> </p> <div style="margin-left: 0.4in;"> References </div> <p></p> <div style="margin-left: 0.2in;"> Index. 0321127420T10162002 </div> <br>