Logical process for developing scalable online news applications in Java

With the development of Internet technology, online news applications have become one of the main ways for modern society to obtain news information. In order to meet the various needs of users and cope with the challenge of high concurrent visits, it has become very important to develop scalable online news applications. This article will introduce the logical process of developing a scalable online news application in Java.

Design Pattern

The commonly used design pattern in Java development is MVC (Model-View-Controller), which divides the application into three parts, the model layer (Model) and the view layer ( View) and control layer (Controller). The model layer is responsible for the storage and operation of data, the view layer is responsible for displaying data, and the control layer coordinates user requests and data operations through the connection between the two. The benefit of the MVC pattern is that it can improve the maintainability and scalability of the application.

Core Technology

Core technologies commonly used in Java development include Servlet, JSP, Spring, Hibernate, etc. A Servlet is a Java program that runs on a Web server and can receive client requests and return responses. JSP (JavaServer Pages) is a dynamic page based on HTML that can be written using Java code and JSP tag language. Spring is a lightweight Java development framework that provides a rich set of components and modules, including dependency injection, AOP (aspect-oriented programming), etc. Hibernate is an object-oriented persistence framework that simplifies the saving and retrieval of data in applications.

Building process

1. First you need to create a Web project and add related dependent libraries.
2. Design the structure of the application using the MVC pattern. Separate data operation and view display, and use the control layer to coordinate the interaction between the two.
3. Write a Servlet class to implement the processing logic of client requests. Create a data model in the Servlet and call the business logic class for data processing, store the results in the data model, and pass the data model to the corresponding JSP page.
4. Write JSP pages and render the data in the data model using appropriate tag languages. You can use JSTL (JSP Standard Tag Library) and EL (Expression Language) to simplify page writing.
5. Integrate Spring and Hibernate to improve the maintainability and scalability of applications. Configure Spring's features such as dependency injection and AOP, and use Hibernate to manage data operations and persistence.

Increase scalability

Generally speaking, to increase the scalability of an application, you need to consider the following aspects:

Database expansion

As the data in the database increases, a single database may become a bottleneck. Therefore, you need to consider how to expand the database. A common method is to disperse the data into multiple databases and use the technology of sub-database and sub-table to improve the capacity and performance of the database.

Front-end load balancing

Front-end load balancing can spread client requests and forward them to various instances of the application. Commonly used tools include load balancers, reverse proxies, caches, etc.

Application Cluster

Deploy the application on multiple servers and use a load balancer to forward client requests to different servers to increase the capacity and performance of the application. To cluster an application, you need to consider issues such as how to share state and how to maintain sessions.

Conclusion

This article introduces the logical process of developing scalable online news applications in Java. By using technologies such as MVC pattern, Servlet, JSP, Spring, Hibernate and increasing scalability aspects, a high-quality online news application can be built to meet the growing needs of users and cope with the challenges of high concurrent visits.

The above is the detailed content of Logical process for developing scalable online news applications in Java. For more information, please follow other related articles on the PHP Chinese website!