Understanding Transactions
Transactions are at the heart of business applications, and the support the EJB container provides for them arguably tops the list of J2EE’s benefits. You’ve gotten an introduction to transactions within EJB in earlier chapters, but now it’s time to look at the details. The goal of this chapter is to explain some of the concepts behind transactional processing and equip you with what you need to know to build EJB applications that execute transactions correctly.
A transaction is a general business concept that represents an exchange between two parties. When you walk into a department store and purchase a shirt, you’re exchanging some form of payment for an item sold by the store. The exchange that takes place defines ...
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