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Case Study: Overview of Securities Trading System
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CERTIFICATION OBJECTIVES
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11.01 Example of SCEA Part 2
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Copyright 2007 by The McGraw-Hill Companies. Click here for terms of use.
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11: Case Study: Overview of Securities Trading System
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his chapter presents a case study that will help you to prepare for and complete Part 2 and 3 of the SCEA exam. You should also review 3 on object-oriented design. Parts 2 and 3 do not require any code. Part 2 is an architecture and design project. Part 3 is a set of essay questions related to your project. The essays we include in other chapters in the book should help you with this part. The nature of the Part 2 assignment requires that you architect a solution for a small business system. To keep the amount of work involved to a reasonable level, the programs you create will be restricted in capability, and simpler than anything you would actually create for a real-world client. You will be graded on correctly solving the technical and performance requirements. According to the Sun site, your project will be evaluated on a large number of objective criteria that fall into three categories: 1. Class Diagram This category covers how well your class diagram(s) address the object model needed to satisfy the requirements. 2. Component Diagram This category covers how well your component diagram(s) convey the structure of the architecture in satisfying the requirements. 3. Sequence/Collaboration Diagrams This category covers how well your sequence or collaboration diagrams satisfy the requirements of the assignment. Additionally, each category is evaluated on UML compliance. The maximum number of possible points is 100. The minimum passing grade is 70. The maximum points per category are
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Class Diagram(s) Component Diagram(s) Sequence/Collaboration Diagrams 44 maximum points 44 maximum points 12 maximum points
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In this chapter, we present you with a securities trading application that includes use cases, a domain object model, and additional requirements. Most systems in the real world start off with requirements, and the exam assignment chooses to define the requirements in use cases and a domain model. As the architect for the application, you must develop the class diagram(s), component diagram(s), and sequence or collaboration diagrams to describe your architecture. This particular case study application was developed for a Wall Street clearing firm, which interacted with hundreds of correspondent trade brokers and their customers. It was intended to help the firm by facilitating the customers ability to trade securities on the web. To be successful, a trading firm (broker-dealers) must
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The Case Study Infrastructure
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transition their firm to a customer-centric, web-based environment. The Internet was seen as a way to maintain and grow new and existing distribution channels, customers, and strategic partnerships. Basically, the challenge was to determine how this trading firm could develop a winning strategy to compete for customers and brokers who wanted the ease of trading securities via the web. The solution is the same for all businesses competing in the new e-commerce world a three-step approach to successful enterprise development: 1. Spend the time to understand what the client needs in this case, browserbased trading functionality. 2. Choose the right technology in this case, Java and Java 2 Enterprise Edition (JEE). 3. Develop a team and teamwork atmosphere to implement the technology choose architects and developers skilled in trade processing and JEE design and development.
The Case Study Infrastructure
As with many large organizations, Bank of New Amsterdam (BNA) has several different operating systems running many kinds of software systems. The primary platform for the production business data is the IBM Mainframe S/390 (the mainframe). In addition, Microsoft NT boxes use Internet Information Services (IIS) and other Microsoft software to provide reporting capabilities, using a SQL Server shadow copy of the business data. BNA also has an investment in Oracle on the S/390. Several preexisting legacy applications provide trade-processing links to the major securities exchanges. These applications work well and have been developed and maintained for the past two decades, during which time a great deal of time and money has been spent. The applications do not need modification; instead, they need a new web front end to make them look good. The development environment is primarily Windows-based. The advantages of using the mainframe include its reliability, scalability, flexibility, and security. The mainframe has been running continuously for years in BNA without major problems. The mainframe can easily be amended to add hardware resources, such as CPU, memory, disk, or networking hardware, to increase capacity without changing the operating system or application systems. In addition, the CPU, memory, and disk space can be redistributed as application requirements change.
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