docs: Content SEO updates (#2990)

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This commit is contained in:
Ilkka Seppälä
2024-06-08 19:54:44 +03:00
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commit 6cd2d0353a
219 changed files with 3308 additions and 2819 deletions
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---
title: Page Controller
title: "Page Controller Pattern in Java: Centralizing Web Page Logic for Cleaner Design"
shortTitle: Page Controller
description: "Explore the Page Controller design pattern in Java with detailed examples. Learn how it handles web application requests and improves architectural organization."
categories: Architectural
language: en
tags:
- API design
- Business
- Client-server
- Decoupling
- Enterprise patterns
- Layered architecture
- Presentation
- Web development
- API design
- Business
- Client-server
- Decoupling
- Enterprise patterns
- Layered architecture
- Presentation
- Web development
---
## Intent
## Intent of Page Controller Design Pattern
The Page Controller pattern is intended to handle requests for a specific page or action within a web application, processing input, and determining the appropriate view for rendering the response.
## Explanation
## Detailed Explanation of Page Controller Pattern with Real-World Examples
Real-world example
@@ -27,11 +29,11 @@ Real-world example
In plain words
> The Page Controller pattern handles requests for specific pages or actions within a web application, processing input, executing business logic, and determining the appropriate view for rendering the response.
> The Page Controller pattern handles requests for specific pages or actions within a Java web application, processing input, executing business logic, and determining the appropriate view for rendering the response, enhancing response handling and system architecture.
**Programmatic Example**
## Programmatic Example of Page Controller Pattern in Java
The Page Controller design pattern is a pattern used in web development where each page of a website is associated with a class or function known as a controller. The controller handles the HTTP requests for that page and determines which model and view to use. This pattern is commonly used in MVC (Model-View-Controller) architectures.
The Page Controller design pattern is a pattern used in web development where each page of a website is associated with a class or function known as a controller. The controller handles the HTTP requests for that page and determines which model and view to use. Predominantly utilized in MVC (Model-View-No-Controller) architectures, the Java Page Controller pattern integrates seamlessly with existing enterprise frameworks.
In the provided code, we have an example of the Page Controller pattern implemented using Spring Boot in Java. Let's break it down:
@@ -119,19 +121,19 @@ public class UserView {
In this example, the controllers (`SignupController` and `UserController`) are the Page Controllers. They handle the HTTP requests for their respective pages and determine which model and view to use. The models (`SignupModel` and `UserModel`) hold the data for the page, and the views (`SignupView` and `UserView`) determine how that data is presented. This separation of concerns makes the code easier to manage and maintain.
## Applicability
## When to Use the Page Controller Pattern in Java
* When developing a web application where each page or action needs specific processing.
* When aiming to separate the request handling logic from the view rendering logic.
* In scenarios where a clear separation of concerns between different layers (controller, view) is required.
## Known Uses
## Real-World Applications of Page Controller Pattern in Java
* Spring MVC (Java)
* Apache Struts
* JSF (JavaServer Faces)
## Consequences
## Benefits and Trade-offs of Page Controller Pattern
Benefits:
@@ -144,13 +146,13 @@ Trade-offs:
* Complexity: Can add complexity to the application structure, requiring careful organization and documentation.
* Overhead: May introduce performance overhead due to additional layers of abstraction and processing.
## Related Patterns
## Related Java Design Patterns
* [Front Controller](https://java-design-patterns.com/patterns/front-controller/): Often used in conjunction with Page Controller to handle common pre-processing logic such as authentication and logging.
* View Helper: Works alongside Page Controller to assist in preparing the view, often handling formatting and other presentation logic.
* [Model-View-Controller (MVC)](https://java-design-patterns.com/patterns/model-view-controller/): Page Controller is a fundamental part of the MVC architecture, acting as the Controller.
## Credits
## References and Credits
* [Core J2EE Patterns: Best Practices and Design Strategies](https://amzn.to/4cAbDap)
* [Design Patterns: Elements of Reusable Object-Oriented Software](https://amzn.to/3w0pvKI)