THE TUTORIAL LIBRARY
In several ways, the dynamic creation and allocation of message-driven bean instances mimics the behavior of stateless session EJB instances, which exist only for the duration of a
Read tutorialYou can pass the HttpSession as parameter to an EJB method, only if all objects in session are serializable.This has to be consider as passed-by-value, that means that it's read-on
Read tutorialA select method can return a persistent field (or a collection thereof) of a related entity bean. A finder method can return only a local or remote interface (or a collection of in
Read tutorialA Java Bean is a software component written in the Java programming language that conforms to the JavaBeans component specification. The JavaBeans APIs became part of the "core" Ja
Read tutorialAbstract 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 tutorialOne example today. A better developer tomorrow.