Hi,
Can we have discussions on the following questions:
1. Which of the following are not considered tiers in a
J2EE based n-tier model?
A Client Tier
B Web Tier
C EJB Integration Tier
D EIS Tier
E EIS Integration Tier
F Legacy Connectivity Tier
G JCA Tier
Discussion points: Please tell me from where I can get information about the options like D, E,F & G.
Means what could be the possible tiers in a J2EE application.
I know its application to application based, but we can think of an application which need to access certain applications or system which requires JCA / LEgacy and EIS connectivity?
I can understand EIS could be Relational Database / XML DB / ERP system etc.
2. This is not a specific question but a general concept to take certain design decision.
Q: Like when to use CMT or BMT?
A: When you want to have fine granularity control over Transaction, we should use BMT otherwise CMT. (Please correct me If I'm wrong)
I'm confused some times when it needs to identify for a particular business case like:
Case I : You have been contracted by a movie memorabilia company to set up an online shop. The company buys bulk goods from movie sets (stage props, costumes, gadgets etc), splits them into single items and then auctions them. The company used to hire sports halls or community centers to auction items in a traditional manner. They predict that by moving to an online solution they will reach a wider audience and make a greater
profit despite the initial investment that the new system will involve. What is the most suitable initial design in the list below?
Case II:
Your have been contracted by a company to upgrade their online shopping application. Their site sells health care insurance to customers at huge discounts. The process of buying insurance is complicated. They have however tried to simplify it as much as possible for the customer. When the customer arrives at their site to register, they fill out a 40-question questionnaire covering basic health and lifestyle information. The answers are then used for selecting the most appropriate level of insurance. (Each customer does NOT get a custom health care insurance agreement; they get the most suitable one out of a choice of 30). The customer then has the opportunity to purchase the insurance within seven days before the quote becomes void. Based on the rough description of the system which of the following is the most suitable design?
Now in both these casee which type of Transaction I should use?
I hope discussion on these topics will be helpful to other
SCEA exam appearing people also.
Regards,
Manish
