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Console . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-41

6-41

Lesson Review . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-43

There are five password policies you can use in any Windows Server 2003 network:

When the afterBegin() callback method completes, the business method originally invoked by the client is executed on the EJB instance Any subsequent business methods invoked within the same transaction will be delegated directly to the EJB instance Once a stateful session bean is a part of a transaction whether it implements Session Synchronization or not it cannot be accessed by any other transactional context This is true regardless of whether the client tries to access the EJB with a different context or the EJB s own method creates a new context If, for example, a method with a transaction attribute of RequiresNew is invoked, the new transactional context causes an error to be thrown Since the NotSupported and Never attributes specify a different transactional context (no context), invoking a method with these attributes also causes an error.

Lesson Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-44

The password policy that is part of the Account Policy of the Security Settings por tion of the Group Policy object that is linked to the domain container. This policy dictates the technical controls that will enforce a password policy for all domain accounts. Some security options and individual user account settings also provide technical control. The password policy that affects the accounts in the local database of the member or stand-alone computers. The written password policy. Some of this policy can be enforced with technical controls, some cannot. The policy that is generally practiced at the organization. Ultimately, all policies can affect the security of the information systems. Your job as a designer is to con sider all these password policies not just those that can be technically enforced and to design an appropriate password policy and controls.

Case Scenario Exercise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-44

A stateful session bean cannot be removed while it is involved in a transaction This means that invoking an @Remove annotated method while the SessionSynchronization bean is in the middle of a transaction will cause an error to be thrown At some point, the transaction in which the SessionSynchronization bean has been enrolled will come to an end If the transaction is committed, the SessionSynchronization bean will be notified through its beforeCompletion() method At this time, the EJB should write its cached data to the database If the transaction is rolled back, the beforeCompletion() method will not be invoked, avoiding the pointless effort of writing changes that won t be committed to the database The afterCompletion() method is always invoked, whether the transaction ended successfully with a commit or unsuccessfully with a rollback.

Troubleshooting Lab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-46

One of the first steps in designing a strong password policy is to identify the techni cal controls available for password policies and to review their limitations. This sec tion describes the technical controls for password policies, the security requirements for user account configuration and security options, and the limitations of technical controls.

Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-48