What is the difference between EJB 3.0 and JPA 1 Answer(s) 5 years and 10 months ago
Posted in : Framework
November 25, 2008 at 3:57 AM
The Java Persistence API, sometimes referred to as JPA, is a Java programming language framework that allows developers to manage relational data in Java Platform, Standard Edition and Java Platform, Enterprise Edition applications.
Persistence consists of three areas:
* the API, defined in the javax.persistence package * the Java Persistence Query Language * object/relational metadata
Hibernate is an Open_source Object-relational_mapping framework for Java
hibernate is a ORM(object relation mapping ) tool which can be used for creating a mapping between plain java bean objects (POJO) and a persitent storage (rdbms). The EJB 3.0 specififcation is divided into two parts the first which deals with session and MDBs and the second which deals with persistence and entity beans. The latter part is called JPA(java persistance API ). HIbernate 3.0 implements the JPA specification. EJB 2.1 is a specification for defining loosely coupled reusable business componenets.ans 2 & 3 ) EJB 2.1 and hibernate serve two different purposes. Hibernate can be co related with the entity beans in EJB 2.1. HIbernate offers far more extensive features then plain entity beans.still there are no containers (applicaiton servers) available which fully implement the EJB 3.0 specification. depending upon the buisness needs hibernate framework can be used in conjuction with EJB2.1 to achieve the JPA abstraction.
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4) How does the bean lookup start in EJB 3 and how
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For more differencebetween JDK and JVM
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This lesson introduces you with EJB3.0, which is being used extensively for
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What is EJB
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1) Java is a Object Oriented programming language developed by Sun Microsystems