Transaction Management

Transactions are a mechanism for simplifying the development of distributed multiuser enterprise applications. By enforcing strict rules on an application's ability to access and update data, transactions ensure data integrity. A transactional system ensures that a unit of work either fully completes or the work is fully rolled back. Transactions free an application programmer from dealing with the complex issues of failure recovery and multiuser programming.

The chapter begins with a general overview of transaction properties and J2EE^TM platform support for transactions. Then it describes the Java^TM Transaction API (JTA), the interface used by the J2EE platform to manage and coordinate transactions. Finally, the chapter describes the J2EE transactional model available to the different types of J2EE components and to enterprise information systems.

In this chapter:

• Properties of Transactions
• J2EE Platform Transactions
• Scenarios
• JTA Transactions
• Transactions in Applets and Application Clients
• Transactions in Web Components
• Transactions in Enterprise Beans
• Transactions in Enterprise Information Systems
• Summary
• Questions and Answers