Some Theoretical Issues In Distributed Systems - Assignment 3

Question 4

Address the following questions that are specific to the sample web service applications of Week 11 tutorial.

1. What is an end point? To access the end point from a web browser, what will be returned?
2. RPC style web service uses a convention to register target name space and service name, what is it? Note: you will need to refer to the WSDL document of Task 1 of Week 11 tutorial to address this question.
3. Refer to the HelloWorldClient.java in the project, describe how to look up a web service and what is returned by the lookup.
4. Task 2 or Week 11 tutorial introduces another way to create the HelloWorldClient with the aid of wsimport tool. Compare the HelloWorldClient in Task 1 and Task 2 to address why using wsimport tool is a better way to create the client of a web service.
5. Based on the practical programming tasks of web service of Week 11, address the main difference between web service and normal (or generic) client/server and the key role of web service in distributed computing.