3. Sessions and Transactions
by Jason Dentler, Alexander Zaytsev, Gunnar Liljas
NHibernate 4.x Cookbook - Second Edition
- NHibernate 4.x Cookbook Second Edition
- Table of Contents
- NHibernate 4.x Cookbook Second Edition
- Credits
- About the Authors
- About the Reviewer
- www.PacktPub.com
- Customer Feedback
- Preface
- 1. The Configuration and Schema
- Introduction
- Installing NHibernate
- Configuring NHibernate with hibernate.cfg.xml
- Configuring NHibernate with App.config or Web.config
- Configuring NHibernate with code
- Configuring NHibernate with Fluent NHibernate
- Configuring NHibernate logging
- Generating the database
- Scripting the database
- Updating the database
- Using NHibernate schema tool
- 2. Models and Mappings
- Mapping a class with XML
- Creating class hierarchy mappings
- Creating class components
- Mapping a one-to-many relationship
- Mapping a many-to-many relationship
- Mapping collections of elements and components
- Setting up a base entity class
- Handling versioning and concurrency
- Mapping by code
- Mapping by convention
- Creating mappings fluently
- Bidirectional one-to-many class relationships
- Mapping enumerations
- Immutable entities
- Mapping relations to non-primary keys
- Using lazy properties
- Mapping joins
- Using calculated properties
- Using serializable values
- Dynamic components
- Mapping <subselect>
- 3. Sessions and Transactions
- Introduction
- Setting up session-per-web request
- Setting up session-per-presenter
- Creating a session ASP.NET MVC action filter
- Creating a transaction ASP.NET MVC action filter
- Save entities to the database
- Using session.Merge
- Using session.Refresh
- Handle concurrency using session.Lock
- There's more…
- Using dictionaries as entities
- Using NHibernate with transaction scope
- 4. Queries
- Introduction
- Query entities by ID
- Using LINQ to NHibernate
- Using CriteriaQueries
- Using QueryOver
- Using QueryOver projections and aggregates
- Using the Hibernate Query Language
- Using native SQL
- Eager loading with LINQ
- Eager loading with Criteria
- Eager loading with QueryOver
- Eager loading with HQL
- Eager loading with SQL
- Using named queries
- Using detached queries
- Using HQL for bulk data changes
- Filtering collections
- Using result transformers
- Extra lazy collections
- 5. Improving Performance
- 6. Testing
- 7. Data Access Layer
- 8. Extending NHibernate
- Introduction
- Creating an encrypted string type
- Creating a money type
- Using well-known instance types
- Using dependency injection with entities
- Creating an audit-event listener
- Creation and change stamping of entities
- Generating trigger-based auditing
- Implementing a soft-delete pattern
- Setting Microsoft SQL's Context_Info
- Using dynamic connection strings
- Using custom dialect functions
- Using custom functions in LINQ
- Extending the LINQ provider
- 9. NHibernate Contribution Projects
- Index
In this chapter, we will cover the following topics:
- Setting up session-per-web request
- Setting up session-per-presenter
- Creating a session ASP.NET MVC action filter
- Creating a transaction ASP.NET MVC action filter
- Save entities to the database
- Using session.Merge
- Using session.Refresh
- Handle concurrency using session.Lock
- Using dictionaries as entities
- Using NHibernate with transaction scope
NHibernate leaves session and transaction management up to the application. There are a number of different ways to manage sessions and transactions, and they depend greatly on the specific application architecture. In addition to a few interesting session methods, the recipes in this chapter show how to handle sessions and transactions for these different types of applications.
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