| Enterprise JavaBean(EJB) is a server-side component architecture based on J2EE specification, and robust, secure and distributed applications can be developed and deployed using it. System performance is one of the most important aspects to be concerned when designing EJB component architecture, because only preeminent performance can give expression to its enterprise level characteristic.The main contribution of this paper includes:(1) Studies the principles, structures and functions of EJB component.(2) Designs and implements an Intelligent Traffic System (ITS) based on EJB using IBM WebSphere Application Developer, and deploys it successfully on IBM WebSphere Application Server. The codes are about 6000 lines; consist of 55 Java classes and interfaces.(3) Proposes several strategies to improve the performance of EJB on the basis of studying and practicing others' work, and puts forward a new method to analyze the performance using stochastic processes and queueing theory from integralaspect.(4) Optimizes the performance of ITS. The test result shows that system performance improves obviously after optimization.This paper is organized as follows:Section 1 introduces present research achievement of EJB technology, and puts forward the study focus of this paper. Section 2 introduces the basic concepts ofserver-side component, and gives the survey on most parts of Java 2 Platform Enterprise Edition (J2EE). Section 3 analyzes the internal structure of EJB component architecture and its calling process, the EJB container tools and services are also introduced. Section 4 discusses the implementation of ITS, including synopsis of its technical architecture and design of EJB model, Web model and Application Client model. Section 5 discusses factors related to EJB performance from two aspects: program design and container deployment, constructs a simulated queueing model. At last, the analysis results are validated by performance and load test.
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