A Developer's Scrappad

Latest Post

Making sense of EJB3.x Transaction Attributes – Part 2 (MANDATORY)

In my previous post, we’ve discussed about TransactionAttributeType.REQUIRES_NEW: how it behaves and where is a good spot to use it. In this post, which is the 2nd part of the series, we’ll explore TransactionAttributeType.MANDATORY.
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Other Posts

Making sense of EJB3.x Transaction Attributes – Part 1 (REQUIRES_NEW)

For the previous past posts, I have dealth much with manual fine-grind transaction, mostly on the subject of Bean-Managed Transaction with javax.ejb.UserTransaction and I’ve talked about what were the differences between rollback() and setRollbackOnly(). Don’t be surprise that Container-Managed Transaction could achieve similar control over transaction if transaction demarcates are properly used. I am writting a series of linked-articles to address usage of @TransactionAttribute with TransactionAttributeType such as REQUIRES_NEW, MANDATORY, SUPPORTS, NOT_SUPPORTED and NEVER.
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EJB3.x JPA: When to use rollback() and setRollbackOnly()

After JTA was introduced for more than a decade ago, then later with the introduction of Bean-Managed Transaction and Container-Managed Transaction in the J2EE 1.2 specs; still, there are many developers, especially those whom had just gotten their feets wet in the marvelous world of Java EE programming were confused when to and not to use the rollback() and the setRollbackOnly() method in the UserTransaction or the EJBContext class. Perhaps you may be coding fine grind transactional methods and have no idea why expections are all over the place and the rollback() or setRollbackOnly() just doesn’t seem to perform according to your expectation. You might think that both methods are the same (but its not). Is this the reason why you have landed on this page through google or through other web sources trying to shade some light?
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Data Transformation and Visualization with D3

I came across this very unique, impressive, non-traditional and “refreshing” javascript data visualization API, which I think it is worth taking your time to explore if you are into areas of graphics and visualization.

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EJB 3.x JPA: Bean-Managed Transaction with javax.ejb.UserTransaction

There are times when handling of data transaction requires a little craftiness where transaction begins, commits and rollbacks could not be a straight-forward one. This is the time when Bean-Managed Transaction comes to play for business process that requires some lengthy customized units of transaction.
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Updates

• Even after JTA was introduced for more than 10 years, I've discovered that there are still many developers who are pretty confused with transaction in EJB. I'll start of with some posts relating to transaction before the 1Q of the year ends. #
• After writing some Java/Java EE stuff, a mix of database/system guides is good for the balance of content. This week, we'll write some things on the Oracle DB. #
• Was truly honored that one of the posts was in one of the blogs of TheAquarium@Oracle. Do check it out with some other links to posts from the some of the top Java Gurus.Thanks alexismp. #
• Had just completed the 4 part series on EJB3 JPA Entity Relationships. I'm gonna take a short break now. Will be back with more articles that will help you in your development journey. Thanks for reading. #