Introduction:
ORM is a programming method for mapping java objects to relational database entities. Entities/classes refer to database tables, instances of classes refer to database rows, and attributes of instances of classes refer to database columns. This also cuts down on the amount of code that needs to be developed. In this blog, I am going to discuss what is Hibernate and a small introduction to hibernate in a detailed view. Learn more about hibernate by joining Hibernate Training in Chennai which provides you certificate and placement support for your career development.
What is Hibernate?
Hibernate is a pure Java object-relational mapping (ORM) and persistence framework that lets you map regular Java objects to database tables. The major purpose of Hibernate is to relieve the developer from common data persistence-related tasks. It effectively maps Java objects to database tables, and you can get the most out of its data query and retrieval facilities. Using Hibernate in your projects can save you a lot of time and effort.
Hibernate Architecture in Java:
The Hibernate Application Architecture is depicted in full here, along with a few key core classes. Hibernate’s architecture is tiered to protect you from needing to understand the underlying APIs. Hibernate acts as a link between a Java program and a relational database.
Session Interface:
Hibernate apps utilize this as their primary interface. This interface’s instances are lightweight and economical to produce and destroy. Thread safety is not guaranteed in Hibernate sessions. It enables you to design query objects that may be used to obtain persistent objects. It encapsulates the Transaction JDBC Connection Factory. It maintains a first-level (required) cache of persistent objects that are used for exploring the object graph or looking up items by identifier. Learn more about this technology by joining Hibernate Course in Chennai with certification.
SessionFactory Interface:
This is a factory that provides session objects to the Hibernate application. Because it is a large object, there will usually be just one SessionFactory for the entire program, which will be shared by all application threads. Hibernate uses the SQL statements and other mapping metadata generated by the SessionFactory caches at runtime. It also stores data that was read in a previous unit of work and can be reused in a subsequent unit of work.
Configuration Interface:
This is where you set up hibernation. It’s also used to get Hibernate up and running. This interface is used to locate hibernate mapping documents.
Transaction Interface:
This is an optional interface; nonetheless, the first three are required in every application. This interface abstracts the code from any transaction implementation, including JDBC and JTA transactions.
Query and Criteria Interface:
This interface allows the user to run queries as well as control the query execution flow.
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Conclusion:
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