J2EE - what is the difference between EJB3.0(CMP) and Hibernate

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what is the difference between EJB3.0(CMP) and Hibernate

Total Answers and Comments: 4

Last Update: July 31, 2009 Asked by: VishwasGenius

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Submitted by: VAMSI MOHAN

1. You can use Hibernate without a full J2EE Containter. But EJB couldn't.

2. Hibernate uses OR Mapping and POJO for persistance. But EJB uses entity beans for persistancy.

3. Hibernate facilitates to work with any Database without changing code. But in case of EJB, sometimes it may be required.

Above answer was rated as good by the following members:
nareshbabuv21

August 31, 2006 04:37:04

Preeti Yadav

Member Since: April 2006 Contribution: 30

RE: what is the difference between EJB3.0(CMP) and Hib...

HIBERNATE is an ORM ( Object-Relational-Mapping) technology. It is an Open-Source and free technology developed in SourceForge.net. Theoretically the EJB specification does not say anything about the method to be adopted in persisting objects for permanent storage and retrieval. It could be simple object serialization.EJB 3.0 has fully embraced Java Annotations introduced in JDK 5.0 and also simplifies the API for CMP entity beans by using Hibernate as the EJB 3.0 Java Persistence engine.

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April 04, 2007 02:47:33

sony vgeorge

RE: what is the difference between EJB3.0(CMP) and Hib...

In hibernate we have .hbm file where we do all the relational things for our application. Each and every pojo (plain java object) we have to specify one .hbm file. it should make some complication if it is a huge project.

In Ejb3.0 we avoid all the hbm file and had taken the approch of annotaion. so we can understand the concept of every pojo easily without refering any other configuration page (In hibernate we have to check .hbm file to know the relation).

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August 31, 2007 22:29:30

VAMSI MOHAN

RE: what is the difference between EJB3.0(CMP) and Hib...

1. You can use Hibernate without a full J2EE Containter. But EJB couldn't.

2. Hibernate uses OR Mapping and POJO for persistance. But EJB uses entity beans for persistancy.

3. Hibernate facilitates to work with any Database without changing code. But in case of EJB sometimes it may be required.

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Overall Rating: +1

July 31, 2009 03:22:27

krishna_ballabh

Member Since: July 2009 Contribution: 2

RE: what is the difference between EJB3.0(CMP) and Hibernate

EJB3.0 does provide the POJO features for ORM in JPA as well as all features of older version in other word we can say that Entity Bean is no longer in EJB to provide the same specification is providing the more strong technology called JPA (Java Persistence API). JPA is an ORM tool which has entity to relation binding like Hibernate with Annotation or with XML configuration. Its older feature like concurrency Transaction Security etc is same like earlier. It could be deployed on Application server web server and on Stand alone application as well with user controlled transition.

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