Sun Java System Application Server Platform Edition 8.1 2005Q2 Update 2 Upgrade and Migration Guide

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### Session Beans

Stateless session beans: `InterestCalculator` allows us to test the following:

- Using and deploying a stateless session bean

- Calling a business method for calculations

Stateful session beans: `BankTeller` allows us to test the following:

- Looking up various interfaces using JNDI and initial contexts

- Using JDBC to perform database queries

- Using various transactional attributes on bean methods

- Using container-demarcated transactions

- Maintaining conversational state between calls

- Business methods acting as front-ends to entity beans (e.g., the “`getAccountSummary()`” method)

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