Chapter 8 Creating J2EE Applications for BEA WebLogic
The read-only concurrency strategy can be used for entity EJBs that are never modified by an EJB client, but may be updated periodically by an external source. For example, a read-only entity EJB may be used to represent a stock quote for a particular company, which is updated externally to the WebLogic Server system.
WebLogic Server never calls ejbStore() for a read-only entity EJB. ejbLoad() is called initially when the EJB is created; afterwards, WebLogic Server calls ejbLoad() only at intervals defined by the read-timeout-seconds deployment parameter.
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