Introduction
Java 2 Platform, Enterprise Edition (J2EE) is a popular java platform developed for the high scale computing of emblematic large activities. J2EE platform exploits dispensed or distributed multitiered purpose for enterprise applications. On technical perspective, appliance logic is subdivided into unique components as per the established function. Also the diverse components that form J2EE application are intricately installed in regard to the tier available in multitiered J2EE setting to which the given component belongs. It ought to be noted that J2EE compromises the following basic tiers:
- Client-tier modules which operate on the client appliance.
- Web-tier components which operate on the J2EE server.
- Business-tier applications operating on the J2EE server.
- EIS (Enterprise information system)-tier software operates on the EIS server.
To develop distributed modules for J2EE architecture, what are required consists of constituent’s technologies, administrative tools, and application programming interfaces’ (APIs). These components are essential segments of developing java applications within allocated network systems.
Enterprise Java Beans
One major component is EJB or Enterprise Java Beans. This component is paramount in that it helps in creation of commercial and core tiers of an application. The component is basically defined as the applications building block.
Java Message Service
Java Message Service is another core J2EE component. The role of this component is etched in providing harmonized message in middle tiers. What it does is to queue the messages before passing them to the subscribers. Thus, this permits the component that had sent the request to pass it to JMS and subsequently forget about the move. The importance of this application is that it creates anonymity between the sender and the data or the information consumer (Lindholm, et al, 2004).
Java Transaction API
Regarding common communication, JTA or Java Transaction API can be highly valuable. It is employed as the principal base for the other applications, that is, JMS and EJB. Basically, the rationale behind JTA is to characterize the local crossing point needed for the transaction manager to sustain transaction administration in the JE dispersed computing environment. The JTA provides a typical interface setting precedence levels of communication (Shahrooz, 2000). This helps to make sure that the acceptable data is returned to the requester. A good illustration of this would be information that is in continuous change because of many client s exploiting and changing it simultaneously (Gosling, et al, 2005). The Java Transaction API helps in controlling the consequences’ and frequencies of the alteration demand so that data is not ruined or overwritten.
Conclusion
These J2EE components are written and compiled just like any other program. However, their core difference is that they are amassed into a J2EE application; also they are developed and verified in consistency with the J2EE provisions. Equally, these procedures allow the components to operate under the management of J2EE server. Also the enterprise information system is employed to handle to handle all instances of EIS. This comprises enterprise infrastructure systems like ERP (enterprise resource planning), database systems, MTP (mainframe transaction processing), in addition to other legacy information structures. And this allows secure access of database connectivity in relation to J2EE application components. Therefore, the publisher ought to delve deeper into these methods so as to understand the best procedures of developing scalable as well as reusable applications that thrive on each other rather than performing as stand alone. As this memo asserts, J2EE methods examined are essential in establishing secure and reliable integration between distributed environments, OOP, and client/server model in regard to government projects.
References
Gosling, J; Joy, B; Steele, L.; Bracha, G. (2005). Java Language Specification. NY: Addison-Wesley.
Lindholm, T and Yellin, F. (2004). The Java Virtual Machine Specification.NY: Addison-Wesley.
Shahrooz, F. (2000) Beyond the Basics.NY: Prentice.