Introduction of Enterprise Javabeanstm Technology

It is a common problem for enterprise developers that it is difficult to write distributed business applications and any other larger applications. If an application is distributed, or appears in multiple forms in a network, it must be a product of integration. If an application has to carry out its business logic reliably and with assurance, the degree of integration must be further improved.

Another complex problem faced by enterprises is that their basic operating environment is also diverse. In addition, companies want to be able to build their own applications as quickly as possible, rather than being limited to a single platform. Ideally, an enterprise developer would write only one application, and the program would run on any platform. Enterprise Javabeanstm Technology is the hope to provide this ability.

The Enterprise JavaBeans (EJB) component structure is designed to be reusable server-side components that enable organizations to build scalable, secure, platform-focused applications that can be run on multiple platforms. This article describes the meaning and structure of the EJB component model, and gives an example of how an EJB component works.

What is Enterprise JavaBeans technology?

The design goal of EJB technology

Enterprise Application Model

Characteristics

Role Assignments for Developers

Development process

The future of EJB

Conclusion

What is Enterprise JavaBeans technology?

The EJB structure is the server-side component model on the JAVATM platform. The purpose of designing an EJB structure is to address the issues raised by enabling enterprise developers to focus only on writing business logic. EJB technology cancels the requirement to write "Full (plumbing)" code. For example, enterprise developers no longer need to write code that handles transactional behavior, security, Connection Sharing, or threads, because the EJB architecture delegates these tasks to the server vendor.

For users and the implementation of this technology, you will receive the following benefits:

Productivity: Using this technology, enterprise developers will further improve productivity. Not only do they get the development results on the Java platform, they can also focus on business logic, which doubles efficiency.

Industry support: Customers trying to build an EJB system will have a choice of solutions available. Enterprise JavaBeans Technology has been accepted, supported and applied by as many as 25 companies.

Investment protection: Enterprise JavaBeans Technology is based on the existing system of enterprise. In fact, many EJB products will be built on existing enterprise systems. Today, the system used by the enterprise will run the Enterprise JavaBeans component tomorrow.

Structure Independence: Enterprise JavaBeans Technology separates the developer from the underlying middleware; Developers see only the Java platform. Does this have to do with the benefits of the crossover platform that will be discussed below? The EJB server vendor has the opportunity to improve the middleware layer without interfering with the user's EJB application.

The server side is only written once and can be run anywhere (Server-side write Once, run Anywheretm): With support for the Java platform, EJB Technology has raised the concept of "write once, run anywhere" to a new level. It ensures that an EJB application can run on any server, as long as the server can truly provide enterprise JavaBeans APIs.