- Java Hibernate Cookbook
- Table of Contents
- Java Hibernate Cookbook
- Credits
- About the Authors
- About the Reviewers
- www.PacktPub.com
- Preface
- 1. Setting Up Hibernate
- Introduction
- Getting the required libraries for hibernate
- Creating a hibernate persistent class
- Providing an XML-based hibernate mapping
- Providing an annotation-based hibernate mapping
- Providing a hibernate configuration using an XML file
- Providing a hibernate configuration using the properties file
- Configuring hibernate programmatically
- 2. Understanding the Fundamentals
- Introduction
- Building a SessionFactory
- Creating a generic SessionFactory provider class
- Opening a new session
- Opening a stateless session
- Saving an object to the database
- Fetching an object from the database
- Removing an object from the database
- Updating an object
- Creating a criteria
- Restricting the results using a criteria
- Pagination using a criteria
- Sorting the results
- Transforming a result
- Using basic projection
- How to do it...
- Scenario 1:
- Scenario 2:
- Code
- Output
- 3. Basic Annotations
- Introduction
- Declaring a class as an entity and creating a table in the database – @Entity and @Table
- Creating a column in the table – @Column
- Creating a primary key and composite primary key column – @Id and @IdClass
- Creating an autogenerator column
- How to do it…
- There's more…
- Attributes available in the @GeneratedValue annotation
- Attributes available in @TableGenerator annotation
- name
- table
- pkColumnName
- valueColumnName
- pkColumnValue
- initialValue
- allocationSize
- 4. Working with Collections
- Introduction
- Persisting List
- Persisting Set
- Persisting Map
- Persisting Array
- Getting ready
- How to do it…
- Inserting a record
- Retrieving a record
- Code
- Output
- 5. Working with Associations
- 6. Querying
- 7. Advanced Concepts
- Introduction
- Working with a first-level cache
- Working with a second-level cache
- Working with a query cache
- Working with the table per class hierarchy strategy of inheritance
- Working with the table per subclass strategy of inheritance
- Working with the table per concrete class strategy of inheritance
- Working with the versioning of objects
- Maintaining the history of an object
- Working with an interceptor
- Working with batch processing
- 8. Integration with Other Frameworks
- Index
- How to do it...
Basically, a stateless session is used to perform only one task. It does not take place in any type of cache. A cache is used to store the frequently used objects in the current context. There are some cases where a stateless session is very useful; for example, if we are reading data from a file and inserting it into the database, we don't need to cache that data further because this is a one-time operation.
Apart from this, a stateless session does not use dirty checking while performing a transactional operation. The collections, as well as hibernate's event model and interceptors, are ignored by a stateless session.
Now, let's look at how to create a stateless session. It's the same as creating a session, but the method is different:
- Enter the following code to open a stateless session:
SessionFactory sessionFactory = HibernateUtil.getSessionFactory(); Session session = sessionFactory.openStatelessSession();
-
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