Chapter 14 Working with Java

Understanding EJB synchronization

Synchronization maintains the coherence of the whole model whenever a change is applied. It occurs progressively as the following model items are modified:

• Operations. Synchronization occurs from interface to Bean class with linked methods. See section Understanding operation synchronization.
• Exceptions. Synchronization occurs from Bean class to interface. See section Understanding operation synchronization.
• Primary identifier Attribute. Synchronization occurs from Bean class to Primary key class, when attribute is primary identifier in Bean class it is automatically migrated to primary key class

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