Difference Between EJB and Hibernate (With Table)

We might not be aware but if we look at our daily life it revolves around the different applications or software. It’s very important to understand the uses of different frameworks, underlying architectures, and which database to use for the storage of different data. EJB and Hibernate are also different components for different purposes when we build an application or software.

EJB vs Hibernate 

The difference between EJB and Hibernate is that EJB is a type of Java Bean and is used to encapsulate the business logic of any java application and connection to the database i.e. it is the default way of writing enterprise applications whereas

Hibernate is a type of ORM framework that maps the classes or objects present in the application to the database tables i.e. how to operate and persist the database. 

EJB refers to the kind of server-side software that commercially encapsulates its logic for an enterprise application. An EJB is a web container that communicates to other JVM(Java virtual machine) hosted on different servers i.e. it is the default way of writing enterprise applications. The full form of EJB is enterprise java bean. It is a run time container for beans that are mainly deployed on the server that’s why it’s also called a server-side component.

Hibernate is a kind of OMR framework whose job is to do the mapping. If seen in detail, it is related to a relational database that does the mapping of its data, and this mapping is done with the help of tables of the database. It also provides query and retrieval facilities related to data. It is also helpful to generate calls.

Comparison Table Between EJB and Hibernate 

Parameters of comparisonEJBHibernate 
DefinitionEjb encapsulates the business logic of an application.Hibernate maps the classes or objects to the tables of the database.
Support Entity RelationshipIt supports the Entity-relationship through Java 5.0 annotationsIt supports the Entity-relationship through mapping files and annotations in JavaDoc
Callback SupportIt supports the callback through Entity ListenerIt supports the Callback through a life cycle, interceptor
AnnotationsJava 5.0 Annotation used to support Attribute Oriented Programming  XDoclet Annotations used to support Attributed Oriented Programming
Queries EJB QL used to express the QueriesHQL used to express the Queries

What is EJB?

The full form of EJB is Enterprise Java Bean which is an acronym for it. Its basic objective is to enhance the secure, robust, and scalable distributed applications provided by Sun Microsystems. To use it, information about it is found with the help of the RMI tutorial.

To use this application, many things are required such as application server i.e. Jboss, Glassfish, Weblogic, Websphere, etc. this is how it works :

  • Complete maintenance of life cycle.
  • The protection.
  • Overseeing transactions.
  • Object pooling.

That is, the entire work of this application depends on the server, so its other name is also a server-side component.

EJB refers to the kind of server-side software that commercially encapsulates its logic for an enterprise application. An EJB is a web container used with a database i.e. it is the default way of writing enterprise applications. It is a run time container for beans which is mainly deployed by the application server.

There is also a certain time when this application must be used. Remote access is required to run this application. In another sense, this application is distributed.

Subsequently, it should also be scalable as it fully supports load balancing, clustering, and failover. Along with this it also requires encapsulated business logic and this application is separated with the help of the presentation and persistence layer.

What is Hibernate?

Hibernate Object Relational Mapping(ORM) is an object-mapping tool, especially for the Java programming language. It provides an underlying architecture for mapping an object-oriented class or model to a relational database(RDBMS).

 It simplifies the development of java applications when it comes to interaction with databases. Interna uses JDBC API to interact with the database which individual has to download as .exe in the machine.

Hibernate uses Java Persistence API also called JPA specification for data persistence, JPA is a java specification that provides standard and few functionalities to ORM tools like hibernate.

There are quite a advantages of using hibernate frameworks like Open Source and lightweight, fast performance because it uses the caching internally and it has two levels of caching.

Using HQL no need to write specific database queries because it generates the database-independent queries, also provides a way to check the Database status and statics of the query like which query is taking a long time to execute. Hibernate provides an automated way to create the tables programmatically so no need to go to the database and create it manually.

It was introduced in 2001 and its origin is said to be Gowin King who started it with the help of EJB2 style Entity Bean.

Main Differences Between EJB and Hibernate

The distinguishing factor between EJB and Hibernate relations can be summed up on the following grounds:

  1. Ejb encapsulates the business logic of an application and needs an application server to host whereas Hibernate maps the classes or objects to the tables of the database.
  2. EJB supports the Entity-relationship through Java 5.0 annotations whereas Hibernate supports the Entity-relationship through mapping files and annotations in JavaDoc.
  3. EJB supports the callback through Entity Listener whereas It supports the Callback through a life cycle, interceptor.
  4. In EJB Java 5.0 Annotation is used to support Attribute Oriented Programming whereas in XDoclet Annotations are used to support Attributed Oriented Programming.
  5. In EJB QL is used to express the database Queries whereas In Hibernate HQL is used to express the Queries.

Conclusion

As we can see both EJB and hibernate are related to Java programming and building the software or applications but the purpose of both the architecture or framework is different.EJB is one of the Java APIs for building modular enterprise applications where it encapsulates the business logic of an application that needs hosting on the application server that’s why also called a server-side component whereas Hibernate is similar to one of the bean’s types of EJB, i.e entity beans however it’s depreciated and not in use anymore, hibernate is ORM tool which maps the domain model to the tables of the relational database.

References

  1. https://dl.acm.org/doi/abs/10.1145/583854.582443
  2. https://dl.acm.org/doi/abs/10.1145/503209.503259
  3. https://books.google.co.in/books?hl=en&lr=&id=bTwfHzMxtQcC&oi=fnd&pg=PA1&dq=what+is+hibernate+in+java&ots=DueZLkRLID&sig=wlYPPYfSUMZsl8pSh_Xx-GCHu5U&redir_esc=y#v=onepage&q=what%20is%20hibernate%20in%20java&f=false
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