EJB in J2EE? , JAVA Programming

Assignment Help:

EJB 2.x is broadly adopted server side component architecture for J2EE.

1. EJB is a remote, distributed multi-tier system and allows protocols like IIOP, JRMP, and HTTP etc.

2. It  enables  rapid  development  of  versatile,  reusable,  and  portable  business  elements which are scalable and transactional.

3. EJB is a specified for J2EE servers. EJB elements contain only business logic and system level programming and produces like transactions, instance pooling , security, multi-threading, persistence etc are allowed by the EJB Container and hence simplify the programming load.

4. Message driven EJBs have to allow for asynchronous communication.

 Having  said  that  EJB  2.x  is  a  broadly  adopted  server  side  component,  EJB  3.0  is  having  ease  of development very majorly and has adjusted its model to allow the POJO (Plain Old Java Object) persistence and the new O/R mapping model based on Hibernate. In EJB 3.0, all models of enterprise beans are just POJOs. EJB 3.0 extensively needs Java annotations, which reduces excessive XML based configuration files and reduces the need for the hard component model added in EJB 1.x, 2.x.

 


Related Discussions:- EJB in J2EE?

Need graphic designer and developer, My name is Myers, the project director...

My name is Myers, the project director of an online business that is scheduled to commence this summer in Nigeria. We are in the process of recruiting members to the project team a

Program to abstract syntax tree constructed, Please submit your answers    ...

Please submit your answers     In this homework, we are going to generate Java Virtual Machine codes by processing the abstract syntax tree constructed from the parsing process

Board coloring, write a java program to board coloring

write a java program to board coloring

Point of Sale Terminal, The problem statement is pretty simple. We need a s...

The problem statement is pretty simple. We need a software implementation of a Point of Sale terminal at a typical store. The users of the system are the cashiers sitting at the sa

Need simple desktop software, Need Simple Desktop Software I am seeking ...

Need Simple Desktop Software I am seeking a software that can do the subsequent: 1. Check position for a URL in Google, Yahoo, Bing. 2. Check position for a YouTube video

Area under curve., write a program to find the area under the curve y=f(x) ...

write a program to find the area under the curve y=f(x) between x=a and x=b,integrate y=f(x) between the limits of a and b.   #include float start_point,

Explain the concept of inheritance, Question: (a) (i) Explain the conc...

Question: (a) (i) Explain the concept of inheritance. Illustrate your answer with a suitable Java example. (ii) Java does not support multiple inheritance but does provide

In programming what is a loop, In programming, what is a loop? A loop i...

In programming, what is a loop? A loop is a programming language statement that permits your code to be repeatedly executed LOOP is a pedagogical programming language designed

Explain about drawing lines, Explain about Drawing Lines? Drawing strai...

Explain about Drawing Lines? Drawing straight lines along with Java is easy. Just call g.drawLine(x1, y1, x2, y2) where (x1, y1) and (x2, y2) are the endpoints of your lines

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd