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11.4.6.3. Read-Only Beans

Entity beans can be marked as read-only. When a bean is marked as read-only, it never takes part in a transaction. This means that it is never transactionally locked. Using commit-option D with this option is sometimes very useful when your read-only bean's data is sometimes updated by an external source.

To mark a bean as read-only, use the read-only flag in the jboss.xml deployment descriptor. 

<jboss>
						<enterprise-beans>
						<entity>
						<ejb-name>MyEntityBean</ejb-name>
						<jndi-name>MyEntityHomeRemote</jndi-name>
						<read-only>True</read-only>
						</entity>
						</enterprise-beans>
						</jboss>

Example 11.11. Marking an entity bean read-only using jboss.xml