What is a Framework? Web Service? Why do you need them?

1. What is a Framework? Web Service? Why do you need them? Wayne Simpson (wsimpson@inel.gov) November 5, 2003

2. Purpose • Show a solution to implement reusable components under a controlled environment • Explain what is a “Framework” for components in Object Oriented (OO) Programming • Explain the need for a Framework • Explain the need for a Web Service

3. Agenda • Problem: Efficiency of Software Development • History • What is a Framework? • Benefits of a Framework • Implementing Framework: Web Services • Cost Savings of a Framework/Web Service • Demonstration

4. Problem: Efficiency of Software Development • Methods of sharing code • Coworkers’ code • Previous applications • Internet search • Modifications cannot be implemented easily • Workload remained the same with fewer resources • Needed consistency in programming/naming conventions

5. History • Received object-oriented training • Received UML training • Studied existing framework • Researched concept of web services • Set proposed standards • Developed four pilot projects • Evaluated lessons learned • Reset standards • Built a number of components for framework • Using framework for all new development activities • Completing evaluation of web services interface

6. Framework (Black Box) Java C# C++ VB.Net What is a Framework? • Framework is a group of components that work interactively with requests from other components or objects to generate a consistent output. Presentation, business rules, database queries, etc Company business rules, standards, policies Object (GUI, XML, data, authentication, etc) Controlled Environment

7. Framework (Black Box) Java C# C++ VB.Net Example Drop Down List, Select * from Users, log file Company business rules, standards, policies Render: Drop Down List of Users on a Web page or Window Application, recording any errors to the log file 75% complexity 25% complexity Procedural Application 100% complexity

8. Benefits of a Framework • Consistency across many platforms • Better able to enforce standards and policy • Better way to reuse components • Lower skilled employee can perform work more efficiently • Single point of change to a common interface • Produce applications that are more robust, faster, stable and consistent

9. Implementing Framework: Web Services • A web service is a component that is presented as a URL that returns the desired information or objects • Web services are built the same way as class objects • Using a web service • Add a web reference • Add applicable XML documents • Call the web service through a URL, passing the necessary parameters • Process the information or object returned

10. Framework and Web Service Environment Framework/ Web Service Presentation Business Objects Database XML Production/ Development Development

11. Cost Savings of a Framework/Web Service • Current Object Orient programming cost savings over procedural programming is 20% to 30% at the INEEL. • Other companies are achieving 40% to 60% • Framework can make up the difference and add another 30% cost savings

12. Demonstration