1. Jeff Webb Maria Baron Chris Hundersmarck
OJB.NET
Jeff Webb
Maria Baron
Chris Hundersmarck

2. What is OJB.NET?
Introduction
Features
Demonstrations

3. What is OJB.NET Copied directly from OJB, then modified.
Created and worked on by 1 person: Richard Beauchamp
An object-to-relational persistence tool for the .NET platform
What is a persistence tool?
Persistence tool: allows the objects exist even after the application is done running.

4. Introduction OJB.NET enables you to:
easily transfer data between your middle-tier .NET objects and a relational database.
Reverse- engineer your database schema
Automatically generate .NET domain-model classes.
query and persist instances of these classes at runtime

5. Introduction Improves Developer Productivity Maintains Data Integrity
Improves Performance

6. Developer Productivity
Automatically generates:
Domain model classes
Mapping b/t domain model classes and database schema
SQL statements
Domain model classes: Entities->automatically generates classes for these entities.
Automatically generating your SQL create, insert, update and delete statements at runtime.

7. Data integrity Maintains data integrity by:
Integrated transaction support
Configurable transaction isolation levels
Optimistic Concurrency support
Strict quality control.
Optimistic Concurrency support: Helps prevent deadlocks and other problems by making a copy of the data in the database before you make your transaction. It then makes sure that noone else has made a transaction and corrupted the data in the database before you have completed yours.
Strict quality control: Over 135 automated NUnit regression tests are integrated into the OJB.NET build.

8. Performance Provides excellent performance by: App-domain caching.
Use of ADO.NET’s DataReader.
Lazy loading
Use of the high-performance ADO.NET DataReader (rather than a DataSet) to retrieve values from the database.

9. Features For a complete list of features, visit:

10. Features Persistable object query support.
Persistable object code generator.
Conversion of database types to .NET types and vice-versa at runtime.
Persistable object query support
queries are made against persistable objects rather than directly against the database tables. Results are returned as a strongly typed persistable object or list of persistable objects
Persistable object code generator.
This speeds-up the development of persistable objects as they are automatically generated rather than hand-coded, and reduces bugs as hand-coding and keeping the o-r mapping file in sync with the persistable objects is error prone
Conversion of database types to .NET types and vice-versa at runtime.
For example, conversion from a .NET enumeration to a database VARCHAR

12. Features Mapping support for 1:1, 1:n, and m:n associations.
Lazy loading of object references and collections
Connection pooling support

13. Structure User Interface QueryFacade (I) QueryFactory Db AccessLayer
BusinessLogicFacade
QueryFacade (I)
QueryFactory
Db AccessLayer

14. Helpful links
Download:
Project page:

15. Demonstration…