Description
The aim of this assignment is to make sure that you understood the concepts covered in the lectures and in the text, including SOA, SOC, SOD, and their applications in software development. You will also follow a tutorial to obtain hands on experience of developing a simple service and a simple application that uses services. By the end of the assignment, you should have applied these concepts in developing simple services and simple applications that uses remote Web services.
Section 1 Practice Exercises (No submission required)
Reading: Textbook chapter 1.
No submission is required for this section of exercises. However, doing these exercises can help you better understand the concepts and thus help you in writing quizzes and exams.
1. Answer the multiple choice questions in Textbook section 1.7. Compare your answers with the answers given the course web page in the folder “Test and Exam Info”. Doing these exercises will help you prepare your weekly lecture exercises and biweekly quizzes, as scheduled in the course calendar.
2. What are SOA, SOC, SOD, SOE, SOI, and SOSE? Briefly state their definitions based on your understanding.
3. What are the main differences between requirement analyses in the OOC paradigm and in the SOC paradigm?
4. What are the major benefits of separating an application builder from the service providers?
5. What are the main techniques in SOSE (service oriented system engineering)? For each technique, write one or two sentences to describe its purpose.
6. Compare and contrast the traditional software development process and the Service-oriented software development process. For each step of the development, write a paragraph to describe the purposes, responsibilities, functions of the step.
7. What is a service registry? What is a service repository? What are their differences?
8. An electronic travel agency needs to be developed. What is your responsibility if you are:
8.1 a service provider?
8.2 a service broker?
8.3 an application builder?
9. You plan to invent a unique online game.
8.1 Describe what you must do as an application builder and what you can expect the service providers to do for you.
8.2 Describe your invention idea and list everything you must do as an application builder.
8.3 List everything that you can possibly find through service brokers.
10. List a few application areas where you believe SOC is a better fit than OOC. State your reasons and justifications.
11. What are the impacts of SOC paradigm to the IT market and to computer science graduates?
Section 2 Tutorials: Using a Web Service in Your Application
These tutorials help you to complete the assignment questions in Section 3. If the services are not available, use another given in text appendix C instead.
Tutorial 1: Creating a simple Web service
This tutorial shows how a service provider develops services for the application builders’ use.
Step 1: In Visual Studio’s File menu, choose New Project…, and then choose “WCF Service Application” Template. This step will allow you to create a new Web service.
Step 2: Follow textbook, Chapter 3, Section 3.2.1, to develop a simple service using Visual Studio.
Tutorial 2: Using WCF Test Client
Follow the text Chapter 3, Section 3.2.2 to test your service using WCF test client
Tutorial 3: Creating a Windows Forms application to consume the service that you developed in tutorial 1.
Follow textbook, Appendix A.1 and Chapter 3 Section 3.6.2 to develop a Windows Forms application.
This tutorial shows you how an application builder makes use of remote services to create an application that provides a GUI for accessing Web services.
Notice that, in order to test your application, you must have the service started first to make the object an active object! You can start the service by right-clicking the file Service.svc in the project and choose “View in Browser.” Then, you will see the service URL in the browser address bar. Use this URL when you chose “Add Service Reference…”.
Tutorial 4: Creating a Web Site application to consume the service that you developed in tutorial 1.
Follow textbook, Section 3.6.3 to develop a Web Site application.
This tutorial shows you how an application builder makes use of remote services to create an application that provides a Web GUI for accessing Web services.
Tutorial 5: Creating an image verifier using the image service
Follow the tutorial given in the textbook, Appendix sections A.3 to develop a Web application that verifies if a human user is entering a Web form. An image verifier is frequently used for preventing programmed attacks to a Web site that allows self-registration.
Section 3 Web Services (Submission required, 100 points)
This section of the assignment is an individual assignment. Each student must perform and submit independent work.
1. Follow the Tutorial 1 given in Section 2 to develop a distance convention Web service. The service contains two operations: [10 points]
double m2km(int m); // convert miles kilometers
double km2m(int km); // convert kilometers to miles
2. Follow the Tutorial 3 given in Section 2 to develop a Windows Forms Application to consume (access) the distance conversion service. [10 points]
3. Follow the Tutorial 4 given in Section 2 to develop a Web Site Application to consume the distance conversion service. The service must be running on localhost. [10 points]
Note: You can develop all three projects in one visual studio solution and submit.
4. Follow the tutorial in text Appendix Section A.1 to create a Web browser that can take any URL and display the content of the page in the window. [10 points]
In the following questions, you will add more features into the browser that you created in the previous question. Choose two questions only from the following set of questions. If you do more than two, we will grade the first two only. Each question is 30 points.
5. Add text encryption decryption function in your browser. Follow the example in text 3.6.3. However, instead of using the localhost service, you must use the remote service in the ASU Repository at:
https://venus.eas.asu.edu/WSRepository/Services/EncryptionWcf/Service.svc [30 points]
6. Add the Get Stock Quote function in your browser. You can use, e.g., the Web service (https://venus.eas.asu.edu/WSRepository/Services/Stockquote/Service.svc) to build your application. For a given stock symbol, e.g., IBM, GOOG, you must display all the values returned in a readable format. [30 points]
7. Follow Tutorial 5 to add the image verifier into your Web browser. [30 points]
8. Find a Web service that convent zip code to map coordinates (latitude, longitude), and add the function into your browser. As reference, you can study these Websites: https://www.ngdc.noaa.gov/dmsp/maps.html and https://graphical.weather.gov/xml/ For example, this URI will return Phoenix weather in an XML file: [30 points]
https://forecast.weather.gov/MapClick.php?lat=33.43&lon=-112.04&FcstType=dwml
9. Add currency exchange function in your browser that shows the reference rate of two currencies. You can find currency exchange services from different sites, for example: [30 points]
Yahoo finance: https://finance.yahoo.com/d/quotes.csv?s=USDEUR=X&f=sl1d1t1ba&e=.csv
Bank: https://www.ecb.europa.eu/stats/eurofxref/eurofxref-daily.xml
The figure below shows a sample layout of your browser. Notice that the sample components in the sample is different from what is required in this assignment. You must design your own layout to best display the required information. However, all parts of the information must be displayed in a single page.
If a particular service is not working, you can use another one with the same level of complexity, for example, the same number of input parameters.
Grading
We will grade your programs following these steps:
(1) We will read your program and give points based on the points allocated to each component, the readability of your code (organization of the code and comments), logic, inclusion of the required functions, and correctness of the implementations of each function.
(2) Compile the code. If it does not compile, 40% of the points given in (1) will be deducted. For example, if you are given 20 points in step (1), your points will become 12 if the program fails to compile.
(3) If the code passes the compilation, we will execute and test the code. If, for any reason, the program gives an incorrect output or crashes for any input, 20% of the points given in (1) will be deducted.
Please notice that we will not debug your program to figure out how big or how small the error is. You may lose 40% or 20% of your points for a small error such missing a comma or a space!
Submission Requirement
All submissions must be electronically submitted to the assignment folder where you downloaded the assignment paper. All files must be zipped into a single file.
Late submission deduction policy:
• No penalty for late submissions that are received within 24 hours of the given due date;
• 1% grade deduction for every hour after the first 24 hours of the grace period!