Hibernate
About Hibernate
Hibernate
is a Java framework that simplifies the development of Java applications
to interact with the database. It is an open-source, lightweight, ORM
(Object Relational Mapping) tool. Hibernate implements the
specifications of JPA (Java Persistence API) for data persistence. Being
an open-source framework, it is available for everyone without any
cost.
Hibernate supports a variety of technologies.
• XDoclet Spring
• Maven
• Eclipse Plug-ins
• J2EE
Why is Hibernate important?
The main advantages of Hibernate which makes it important are
•
ORM - Hibernate ORM easily solves the data mismatch found between the
object-oriented classes of an application and a relational database. ORM
connects these two with ease through the use of the XML mapping file. It
enables to gain complete control over the application as well as the
database design. This feature makes Hibernate flexible and powerful.
•
Transparent Persistence - Hibernate’s transparent persistence ensures
the automatic connection between the application’s objects with the
database tables. This feature prevents developers from writing lines of
connection code. Transparent persistence enables hibernates to reduce
development time and maintenance costs.
• Database independent -
Hibernate is database independent. It can be used to connect with any
database like Oracle, MySQL, Sybase, and DB2 to name a few. This cross
database portability of Hibernate is easily achieved by changing a
parameter ‘database dialect’ in the configuration file. Database
independency is considered one of the major advantages of Hibernate.
•
HQL - Hibernate supports a powerful query language called HQL
(Hibernate Query Language). This query language is more powerful than
SQL and is completely object-oriented. HQL’s advanced features like
pagination and dynamic profiling are not present in SQL.
•
Dual-layer Caching - Hibernate supports both first level and second
level caching mechanisms. The first level of caching is associated with the Session object which is used by default. The second level caching is
related to the Session Factory object.
• Through caching concept,
Hibernate retains the objects in cache to reduce repeated hits to the
database. This feature makes Hibernate highly scalable and optimizes the
application’s performance.
• Version Property - Hibernate
supports optimistic locking through its version property feature. This
functionality supports multiple transactions without affecting one
another.•
• Open Source - Hibernate is available as an open source
software with zero cost product license. This light weight software can
be downloaded from its source website hibernate.org. The latest version
of Hibernate that can be downloaded is 4.3.10.
• Scalability -
Hibernate is highly scalable. It adapts itself to any environment. It
may be an intranet application with a few hundred of users or a large
critical application with thousands of users. Hibernate supports both applications equally.
• Lazy-Loading - The lazy-loading
concept fetches only the necessary object that is required for the
execution of an application.
Who should take the Hibernate Exam?
• IT professionals
• Java Programmers or Software Developers
• Anyone who wants to assess their Hibernate skills
• Java and Hibernate consultants
• Professionals working in outsourced companies responsible for development using Hibernate
• Any professional with skills and knowledge on Hibernate
• Anyone interested in Hibernate
Hibernate Certification Course Outline
1. Java Persistence Basics
2. Hibernate Basics
3. Hibernate Querying
4. The Persistence Lifecycle
5. Hibernate and Relationships
6. Hibernate and Inheritance Mapping
7. Additional Querying Capabilities
8. The Criteria API
9. Hibernate and Java Persistence