Understand About Hibernate

Understand About Hibernate

Understand About Hibernate

Hibernate is an ORM tool. Hibernate is a solution for object-relational mapping and a persistence management layer. For example a java application is used to save data of an object to a database.

Hibernate is open source ORM tool. Hibernate reduces the time to perform database operations. Hibernate has advantages over using entity beans or JDBC calls. The implementation is done by just using POJOs.

Object Relational Model is a programming technique. This technique is used to convert the data from an incompatible type to that of a relational database. The mapping is done by using the OOP.

Session Interface: The basic interface for all hibernate applications. The instances are light weighted and can be created and destroyed without expensive process.

Hibernate Template is a helper class that is used to simplify the data access code. This class supports automatically converts Hibernate Exceptions which is a checked exception into. Hibernate Template, which is a Spring Template class, can simplify the interactions with Hibernate Sessions.

Rather than utilize bytecode processing or code generation, Hibernate uses runtime reflection to determine the persistent properties of a class. The objects to be persisted are defined in a mapping document, which serves to describe the persistent fields and associations, as well as any subclasses or proxies of the persistent object.

Hibernation is a power-saving state designed primarily for laptops. While sleep puts your work and settings in memory and draws a small amount of power, hibernation puts your open documents and programs on your hard disk, and then turns off your computer. Of all the power-saving states in Windows, hibernation uses the least amount of power. On a laptop, use hibernation when you know that you won't use your laptop for an extended period and won't have an opportunity to charge the battery during that time.

Sleep is a power-saving state that allows a computer to quickly resume full-power operation (typically within several seconds) when you want to start working again. Putting your computer into the sleep state is like pausing a DVD playerthe computer immediately stops what it's doing and is ready to start again when you want to resume working.

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