Now a days everybody claiming that they have their own data center.
Question: What is data center? What are the types of data centers?
Check this links.
http://www.dntp.com/news/pdfs/Data%20Center%20Tier_Classification.pdf
http://en.wikipedia.org/wiki/Data_center
Search in google for “Data Center Tier_Classification.pdf”
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Problem Statement: How to setup quickly simple work flow application in organization?
One quick solution is Serena Business Mashups Product
Check this link: http://www.serena.com/mashup-eval/guide/eval_mashup.htm
or check http://www.serena.com/index.html
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It is nice concept to explore and get benefit out it.
Simple Notes: http://en.wikipedia.org/wiki/Complex_event_processing
More Advanced Information: http://www.thecepblog.com/what-is-complex-event-processing/
Open Source product for implementation: http://www.espertech.com/index.php
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Unknowingly all of us do Complex Event Processing in our day to day life.
Question 1: Whey today lot of people are driving from north to center of Atlanta?
We are trying to analyse many events and trying to understand. We find that there is a game in town.
Question 2: Why stock x sold at very high volume today?
Digging into news will tell the details of it.
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How payment gateway works?
http://en.wikipedia.org/wiki/Payment_gateway
Nice video presentation https://www.mastercardpaymentgateway.com/mpgpublic/howItWorksIndex.do?
Credit Card Processing is part of every business. We need to choose wisely while going to sign contract with any payment gateway vendor. Here are the few points from my side.
1. They should have 99.99% up time. (Generally this is only on papers. They go down at least once in a month. or They take more time to process if one of their servers goes down.)
2. Never try to tie your fields tightly with payment gateway. This increases the coupling. Reduce coupling by different adapters or mapping.
3. They confuse end user (developer) by providing too much information in return. Be cautious while depending on it.
4. We need to maintain PCI Standards. https://www.pcisecuritystandards.org/
The rest we can read at http://www.sitepoint.com/print/money-where-mouse-is-gateways/
Few Payment gateway vendors
http://www.chasepaymentech.com/
http://www.authorize.net
http://www.firstdata.com/
http://www.fiserv.com
Note: These projects can be done in java technologies ranging from one day to one year. Based on project complexity.
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