What is JBoss EJB?
The JBoss EJB container architecture employs a modular plug-in approach. All key aspects of the EJB container may be replaced by custom versions of a plug-in and/or an interceptor by a developer. This approach allows for fine tuned customization of the EJB container behavior to optimally suite your needs.
What is EJB and how it works?
An EJB container is a run-time container for beans that are deployed to an application server. The container is automatically created when the application server starts up, and serves as an interface between a bean and run-time services such as: Life-cycle management. Code generation.
What is EJB application?
Based on the Enterprise JavaBeans (EJB) specification, enterprise beans are Java components that typically implement the business logic of Java 2 Platform, Enterprise Edition (J2EE) applications as well as access data.
Is EJB still alive?
EJB is still there and growing up. There are many new features (SOAP/RESTful webservice, JPA entities, JAXB…)
Why EJB is used in Java?
EJB beans are specifically designed to implement the business logic of your application. As such they provide services that are often needed when implementing such logic, such as transactions, injecting of the entity manager (used for JPA, the Java Persistence API) and pooling of beans.
Is EJB a framework?
The features of the Spring framework such as Inversion of control (IoC), Aspect-Oriented Programming (AOP), and transaction management, make it unique among the list of frameworks. EJB is a specification of Java EE. Spring is a framework.
What is the advantages of using EJB?
Advantages of EJB The EJB developer focuses on solving business problems and business logic. Java beans are portable components that help the JAVA application assembler to formulate new applications for the already existing JavaBeans. EJB container helps in providing system-level services to enterprise Java beans.
What is this EJB tutorial?
This tutorial is developed to provide a comprehensive understanding about the EJB concepts helpful to create and deploy an enterprise level application up and running. This tutorial is designed for Software Professionals as well as for all those who are willing to learn EJB Programming.
What are the EJB extensions for JBoss?
JBoss Extensions to EJB 3.0 Message Driven POJOs Message Driven POJOs Using a Deployment Descriptor Service POJOs Service POJOs Using a Deployment Descriptor Asynchronous calls EJB 3.0 Tutorial/Examples Stateless EJBs Stateful EJBs Transactions and Security Dependency Injection
What’s new in EJB 3 1?
The EJB 3.1 specification addresses this problem by removing the restriction that enterprise bean classes must be packaged in an ejb-jar file. You now have the option of placing EJB classes directly in the .war file, using the same packaging guidelines that apply to web application classes.