Discussion ORM Hibernate Best FIT Hibernate Tutorial Example

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Hibernate Tutorials: Hibernate Case Study Class Hierarchy Persist Example Using Hibernate Interceptor Hibernate Questions with Answer Hibernate Many-to-Many Mapping Example Hibernate one-to-many Mapping Example Hibernate and ORM tools Spring Hibernate Example Hibernate SessionFactory Example Hibernate Mapping Class Hierarchy Hibernate Questions Hibernate SessionFactory Questions Spring Hibernate Example: Spring Hibernate Case Study


Please be informed that NONE of the design/code from this
page is claiming to be some sort of best practices and we DO NOT expect
any of our visitor/reader of this page to assume this as some sort of
best practice for any context and should not be using this 
as it is without appropriate evaluation to their, so to say, 
specific programming context.

This page intends only to provide bit and piece of known ways  for
doing some sort of example and may not be fit for any other purpose.


Hibernate can be used with
Java Application, or web
application or EJB Enterprise
application.

Hibernate requires
configuration file such as
hibernate.cfg.xml file, to
specify SessionFactory
attributes such as DataSource
, transaction factory,
transaction manager

This configuration file has all the object related HBM file reference.

Hibernate can be used in persistence layer, along with DAO (Data Access
Object) wrapper. Why DAO wrapper? to my understanding, it is always
advisable to hide any hibernate and SQL exception in DAO and provide
application with its own exception type.  This makes other layer like
business and presentation makes some sense of this exception, and by this
way we can achieve de coupling of persistence related implementation from
other layer.



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In future if some other better utility available to us, application should
be able to grow and accept this utility with minimal impact in terms of
code changes.

ORM Object Relational Mapping tool, the name suggests that it is a tool
that is providing a mapping	between Java Object to RDBMS (Relational
Database Management System). basically it provides a wrapper over all
sorts of access to database, and provides some simple methods for Java
developers to use, and these tools writes appropriate SQL (Structured
Query Language) to persist data available in Java Objects to appropriate
database tables, of course by looking at all the configurations / settings
mentioned in respective configuration files.

In todays enterprise world, only persisting data into database is not enough,
these mapping tools should transparently be able to propagate transactions
initiated by caller as well. And these ORM tools should be having some ways
to perform better and scale too. Many ORM tools are available, out of these
Hibernate is a Open Source ORM tool that is growing nicely and is accepted
by wide customer base.



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