Download EJB 3.0 Database Persistence with Oracle Fusion Middleware by Deepak Vohra PDF

By Deepak Vohra

EJB (Enterprise JavaBeans) 3.0 is a time-honored database patience know-how in Java EE functions. EJB 3.0 has simplified the advance of EJBs with an annotations-based API that gets rid of using remote/local interfaces, home/local domestic interfaces, and deployment descriptors. a few different books can be found on EJB 3.0, yet none covers EJB 3.0 help in Oracle Fusion Middleware 11g, that is one of many leaders within the program server marketplace. this is often the 1st booklet that covers all points of EJB 3.0 database patience improvement utilizing Oracle Fusion Middleware expertise. It covers all of the top practices for database endurance making sure that your functions are simply maintainable. Leaving concept at the back of, this e-book makes use of real-world examples to steer you in development your personal EJB 3.0 purposes which are good built-in with regular Java EE frameworks.

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Id Specifies an identifier property. @Column Specifies the database table column for a persistent entity bean property. @NamedQueries Specifies a group of named queries. @NamedQuery Specifies a named query or a query associated with a finder method. @OneToMany Specifies a one-to-many CMR relationship. @OneToOne Specifies a one-to-one CMR relationship. @ManyToMany Specifies a many-to-many CMR relationship. x entity bean class is annotated with the metadata annotation @Entity. 0 POJO class with the @NamedQuery annotation.

Pdf). Interceptors An interceptor is a method that intercepts a business method invocation or a lifecycle callback event. x, runtime services such as transaction and security are applied to bean objects at the method's invocation time, using method interceptors that are managed by the EJB container. 0 has introduced the Interceptor feature with which the interceptors may be managed by a developer. AroundInvoke annotation. Interceptors may be used with business methods of session beans and message-driven beans.

Any method may be made a callback method using the callback annotations such as PostActivate, PrePassivate, PreDestroy, and PostConstruct. The callback methods may be specified in a callback listener class instead of the bean class. 0. 0. 0 metadata annotations reduce the code required and make the deployment descriptors redundant. 0 entity beans, and only a POJO class is required for an entity bean. The Java Persistence API provides an object-relational mapping model. 0. 0 entity bean. 0 specification has facilitated the development of EJBs by providing an annotations-based API in which the remote/local and home/ local home interfaces are not required.

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