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JPA Provider: Java Persistence API, that is, JPA, is considered a specification.We use those features that we may think are light enough for the project. Layered Architecture: Hibernate, as a layered architecture, doesn’t obligate us to use everything it provides.Built-In Connection Pool Implementation: Hibernate integrates with the most reliable connection pool implementation, that is, C3P0, automatically.Database Independent: At the backend, Hibernate is independent of the database’s engine.Now we’ll list down the advantages of using the Hibernate. Hibernate implements the architectural design pattern of ORM just as similar to other implementations. It does not require redoing an already completed task which is also tried, tested, and used again, thus saving time. Well-Structured: ORM has a practical design pattern implemented and tested well.A robust, ready, and trusted ORM engine efficiently manages the database.

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Using ORM decreases the time it takes to implement an application exponentially, eliminating the need to examine the code and mapping mechanism.

High Yielding: Implementing an application with JDBC presents a significant challenge: spending time developing, tuning, and maintaining the relevant JDBC code.

Let us have a look at some of the main advantages we get by implementing ORM. It is also helpful in implementing object-oriented programming concepts in a relational database.

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Hibernate is a free and open-sourced object-relational mapping library for Java specifically built to map objects to any Relational Database Management System. Object Relational Mapping, or ORM, is an answer to the problem of easily mapping the Object Domain Model to relational persistence collection. You can’t maintain two separate session factories for Oracle or MySQL alone. For example, if an application uses two databases: MySQL and Oracle, one session factory should be maintained for MySQL, and one session factory should be maintained for Oracle. Using Session Factory (an interface), one can create an instance of a session and use this instance just because there should only be one session factory for every database. A session does not only help an application in creating a connection with the database but also works toward saving and fetching the persistent object in Hibernate. This mapping results in objects totally based on the properties mentioned in the configuration XML file of Hibernate. Once the queries have been executed, Hibernate will then perform the mapping of the results to their respective application layer. To execute the queries, Hibernate uses Hibernate Query Language or HQL. When compared to JDBC, Hibernate will connect itself with the database. As already told, Java Hibernate is an ORM tool that helps ease all these issues faced while using JDBC for database connectivity. Also, switching from one database to another, implementing oops with JDBC, and creating associations between database tables require lots of effort and rework without using the Hibernate framework. To retrieve data from the database, repeatedly writing the same lines of code in your application, again and again, can be tiring and irritating. There are four layers in Hibernate architecture. Hibernate framework uses many objects such as session factory, session, transaction, etc., along with existing Java API such as JDBC ( Java Database Connectivity), JTA (Java Transaction API), and JNDI (Java Naming Directory Interface). The architecture of Hibernate consists of objects like a session factory, transaction factory, persistent object, etc. With the help of the database and configuration data, Hibernate can provide persistence services and objects to the application. The architecture of Hibernate is layered such that the user does not need to know the underlying APIs to operate. Hibernate will work to persist the Java objects depending upon the correct O/R patterns and recognition mechanisms. Java objects and database server interacts with each other via Hibernate. Hibernate implements Java Persistence API specifications and is a powerful object-relational persistence and query service for applications developed in Java. Another important thing is that this is a high-performance open-source tool. It is an ORM tool that is powerful and lightweight. It simplifies the interaction of a database and the Java application being developed. Hibernate is the Object-Relational Mapping (ORM) framework in Java created by Gavin King in 2001.

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Web development, programming languages, Software testing & others What is Java Hibernate?

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