Repository pattern: (এটি Enterprise design pattern। এটি মূলত data store or persistance layer (পারসিসটেন্স লেয়ার মানে যে ডেটা কম্পিউটারে স্টোর থাকবে সিস্টেম রিসেস্ট দেওয়ার পরেও। যেমন ডাটাবেইজ) এর সাথে কমিনিকেশন করে কাজকে সহজ করে দেয়। data গুলো add update delete করার জন্য কতগুলো method declare করে রাখবো এবং দরকার হলে সেগুলো use করবো। এতে করে programmer দের pain কমে যাবে। এটি martin fowler প্রদান করেন। এটি entity framework এ already implemented) The Repository pattern is a design pattern used in software engineering to provide a consistent interface for storing and retrieving data from a data store, such as a database or a web service. The Repository pattern provides a level of abstraction between the application and the data store, making it easier to change the data store or the data access logic without affecting the rest of the application. The Repository pattern typically consists of two main components: the Repository interface and the Repository implementation. The Repository interface defines the methods for storing and retrieving data, such as adding, updating, and deleting entities. The Repository implementation provides the logic for accessing the data store and implementing the methods defined by the Repository interface. The Repository pattern is commonly used in applications that require a high level of data abstraction, such as enterprise applications, e-commerce systems, and content management systems. The Repository pattern provides several benefits to software developers, including improved maintainability, testability, and flexibility.
One of the main benefits of the Repository pattern is improved maintainability. By providing a consistent interface for data access, the Repository pattern reduces the coupling between the application and the data store, making it easier to change the data store or the data access logic without affecting the rest of the application. Another benefit of the Repository pattern is improved testability. By providing a level of abstraction between the application and the data store, the Repository pattern makes it easier to test the application logic without relying on a specific data store or service.
Finally, the Repository pattern provides increased flexibility by allowing the application to work with domain objects instead of low-level data structures. This makes it easier to change the underlying data store or services without affecting the rest of the application.