Showing posts with label database. Show all posts
Showing posts with label database. Show all posts
Tuesday, August 29, 2017
Create charts using ExtJs Java Servlets and MySql database Bar Column Pie and Line Chart Examples
Create charts using ExtJs Java Servlets and MySql database Bar Column Pie and Line Chart Examples
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Sunday, August 20, 2017
Database Data Access Layer DAL
Database Data Access Layer DAL
Related to my previous writing about MVC, there is other thing that Id like to share. Previously, I wrote that MVC helped a lot in creating a big (enterprise?) application. While MVC defines layers that represent layer in same level, DAL (Data Access Layer) provides a depth in application abstraction. DAL logically inserted below business process layer to provide independent-to-database access. The DAL itself contains implementation to specific database access and also interfaces to business process layer.
The benefit of DAL is not far difference with MVC. By separating business process with data access, we may create several implementation of data access (to MySQL, MSSQL, Oracle, etc) without having problems changing the business process.
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