There is a pure division of roles between the two .
Home Interface is the way to communicate with the container which is responsible for creating , locating and removing beans and Remote Interface is the link to the bean that allows acces to all methods and members.
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J2EE defines three types of archives: Lazy loading means not creating an object until the first time it is accessed. Lazy loading typically looks like this: No, you cannot map more than one table to a single CMP Entity Bean. CMP has been, in fact, designed to map a single table. No. 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 class. It is the stuff to add specific functionality to a single & pointed object and leaves others like it unmodified.It is having close similarities like aspectJ stuff, but not with EJB Stateless SessionBean create() method doesnot contain any parameters and the syntax is as follows: The bulk of the changes in EJB 2.0 are found in the definition of a new CMP component model. It’s radically different from the old CMP model because it introduces an entirely new participant, the persistence manager, and a completely new way of defining container-managed fields, as well as relationships with other beans and dependent objects. The ejbCreate() methods is part of the bean’s lifecycle, so, the compiler will not return an error because there is no ejbCreate() method. Deployment descriptor is a XML file.which is used to locate the web applicatio n by container.it includes the details of respective bean. Container services are totally depends upon the “vendor implementation”. But more or less most of the vendors suppots the basic services like, |
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