JAVA Design Pattern


JAVA Design Pattern The design patten is a vast subject, I will be giving you an head start here Gang of Four – widely used design patterns Behavioral patterns Chain of responsibility Command Interpreter Iterator Mediator Memento Observer State Strategy Template method Visitor Creational patterns Abstract factory Builder Factory method Prototype Singleton Structural patterns Adapter […]

EJB cont


Entity Bean An entity bean is representation of single row in a databases. Entity always be an heavy component. But the connectivity to database will be a transparent to developer. When you create a new entity bean automatically in database new row will be added. ORM – Object Relational Mapping, row in a table will […]

ENTERPRISE JAVA BEANS


sCOPE oRGANIZATION wIDE MVC Model= EJB View= JSP Controller = SERVLET Why should we go for EJB? Scalability (application should work same for 2 client and 2 million client.) Should be catering to multiple request simulatanously. Problem with the thread is Sycronization. EJB CONTANER, will work on instance pooling and multiple instance. Example jdbc to […]

Middleware


Middleware Client/server is dead. That’s the buzz now that newer Internet-based technologies are flourishing. But those new technologies are merely the natural evolution of earlier approaches, implemented with newer, more open protocols and designed to provide greater scalability, manageability, and diversity. Middleware is computer software that connects software components or applications. It is used most […]