THE TUTORIAL LIBRARY
Abstract schema is part of an entity bean's deployment descriptor which defines the bean's persistent fields and their relationship. Abstract schema is specified for entity beans w
Read tutorialAn EJB can use local client view only if it is really guaranteed that other enterprise beans or clients will only address the bean within a single JVM.
Read tutorialAn MDB is essentially a message consumer that can listen to a message destination or a message endpoint and gets activated when a message arrives. By design, MDBs are anonymous in
Read tutorialCallback methods allows the container to notify the bean of events in its life cycle. The callback methods are defined in the javax.ejb.EntityBean interface.
Read tutorialDeployment descriptor is a XML file. which is used to locate the web applicatio n by container.it includes the details of respective bean.
Read tutorialFor a Session bean - one EJB object for one bean instance
Read tutorialIf we define the entity bean as being reentrant, multiple clients can connect to the Entity bean & execute methods within the entity bean concurrently.
Read tutorialThis technique is most useful when you have large hierarchies of objects (such as a product catalog). You can lazy-load subordinate objects as you navigate down the hierarchy, and
Read tutorialWhat is the difference between EAR, JAR and WAR file? A JAR file encapsulates one or more Java classes, a manifest, and a descriptor. JAR files are the lowest level of archive. JAR
Read tutorialNo, you cannot map more than one table to a single CMP Entity Bean. CMP has been, in fact, designed to map a single table.
Read tutorialNo. Decorator design pattern, is the one which exhibits very low level runtime polymorphism, for the specific and single object (Instance of the class), but not for atleast for a c
Read tutorialSince EnterpriseBeans live in a managed container, the container is free to call your EJB components methods at its leisure. The container houses the information like current statu
Read tutorialOne example today. A better developer tomorrow.