95-843 Service Oriented Architecture          Homework 2

Due: Friday, June 1                       

    In chapter 2 of "Oracle SOA Suite 11g R1 Developer's Guide" we are
presented with two short tutorials. 

    (1) The first tutorial introduces us to the construction of a simple 
BPEL process with a mediator component. Work through this tutorial and 
submit screen shots of the test environment. The screen shots should 
include your name as the input and output of the process. 
Also, include a screen shot showing your BPEL process diagram.

    (2) The second tutorial introduces the Oracle Service Bus and steps us
through the process of building a proxy service and a business service.
Work through this tutorial and submit screen shots of the test environment. 
The screen shots should include your name as the input and output 
of the process.

    Short answer essay questions. Answer the following questions with a few 
well written sentences devoted to each. Prior to answering these questions, 
be sure to read over the EIP site (linked to from the course schedule) and 
the Oracle OSB presentation (also linked to from the course schedule.) Your 
answers should be type written and on paper.

    (3) Why is it said that an ESB provides for location transparency?

    (4) How might an ESB provide for backward compatibility?

    (5) Consider the Message Translator pattern found on the Enterprise
Integration Patterns (EIP) site. Discuss this pattern with respect to 
Oracle's Service Bus.

    (6) From EIP, draw the Command Message pattern and the Document message
pattern. 

    (7) Draw the EIP Process Manager pattern and discuss with respect
to the tutorial in Chapter 2. Be sure to take a stand. Is EIP Process Manager
describing BPEL or the ESB?

    (8) How might an ESB be used to promote protocol independence? Be sure to
describe what is meant by "protocol independence".

    (9) In the slides on Oracle OSB there is a discussion of advanced
mediation policies. What is meant by the term "throttling"?

    (10) Again, referring to the slides from Oracle, describe three 
capabilities of the OSB Console.