Descripción:
Los Enterprise JavaBeans (también conocidos por sus siglas EJB) son una de las API que forman parte del estándar de construcción de aplicaciones empresariales J2EE (ahora JEE 5.0) de Oracle Corporation (inicialmente desarrollado por Sun Microsystems). Su especificación detalla cómo los servidores de aplicaciones proveen objetos desde el lado del servidor que son, precisamente, los EJB: Comunicación remota utilizando CORBA, transacciones, control de la concurrencia, eventos utilizando JMS (Java messaging service), servicios de nombres y de directorio, seguridad, ubicación de componentes en un servidor de aplicaciones.
Los EJB proporcionan un modelo de componentes distribuido estándar del lado del servidor. El objetivo de los EJB es dotar al programador de un modelo que le permita abstraerse de los problemas generales de una aplicación empresarial (concurrencia, transacciones, persistencia, seguridad, etc.) para centrarse en el desarrollo de la lógica de negocio en sí. El hecho de estar basado en componentes permite que éstos sean flexibles y sobre todo reutilizables.
Dirigido a: Desarrolladores y programadores web.
Nivel: intermedio.
Conocimientos previos:
Estar familiarizado con lenguajes orientados a objetos, haber cursado el curso Fundamentos de Java o el curso de JSP & Servlets o tener experiencia equivalente en el lenguaje y Comprensión de lectura de textos en idioma inglés.
Temario:
Introducción a EJB | Arquitectura EJB | Exposicion: la vista cliente | Sesión de Bean: ciclo de vida | Entidades y persistencia | Sincronizar bean / entity | Relaciones entidad bean | Obtener mensajes: message-driven beans | La era atómica: transacciones EJB | Cuando regresan los beans: excepciones en EJB | Seguridad en EJB | Deployment | Examen demo de certificación
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