JAVA Architecture

Definition-

Architecture defines infrastructure for design and integration of internet computing systems by analyzing information requirements; technology, determining platform architecture, and tools; studying business operations and user-interface requirements; directing development of physical database.

Types of architecture-  Here tier can also be referred as Layers.  There are total three layers in the application 1) Presentation layer 2) Business Layer and 3) Data Layer

1) Presentation Layer- It is top most layer of the application. It is also called as the Client Layer. By this layer we can browse web pages, It’s main work is to communicate with Application Layer. When user gives the input through input device like keyboard, mouse clicks to presentation layer it paases the information to application layer. So basically it is passing the information to the application layer. Example- When we login to Gmail user can see the buttons to enter user id, text boxes and user has to enter the id and password to login, Presentation layer takes the information from the user and pass to the application layer.

2) Application Layer- It is also called as Business Layer. From the gmail example after receiving information from presentation layer application layer interacts with the Database and sends required information to the presentation layer.

3  ) Data Layer-  In this data storage, retrieve and delete takes place. Application layer ask data layer to retrieve data and store data.

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