Summary of Jooby MVC API

Jooby is a micro web framework for Java that simplifies the process of building web applications. The MVC (Model-View-Controller) API in Jooby helps developers structure their applications in a clear and organized manner. This article highlights the key concepts, main features, and an example workflow of using the Jooby MVC API.

Key Concepts

• MVC Architecture:
  • Model: Represents the data and business logic of the application.
  • View: The user interface that displays the data to the user.
  • Controller: Handles user input and interacts with the model and view.
• Routing:
  • Jooby uses a straightforward routing mechanism to map HTTP requests to specific controller methods.
  • Routes can be defined using annotations or programmatically.

Main Features

• Annotations:
  • Jooby provides annotations to define routes directly in controller classes.
  • Example:
• Dependency Injection:
  • Jooby supports dependency injection, making it easy to manage and inject dependencies into your controllers.
• View Rendering:
  • Jooby can render views using templates and supports various template engines like Mustache, Handlebars, and Freemarker.

@Path("/hello")
public class HelloController {
    @GET
    public String sayHello() {
        return "Hello, World!";
    }
}

Example Workflow

Render a View: Return a view in the controller method.

@GET
@Path("/user/{id}")
public void getUser(@PathParam("id") String id, Response response) {
    // Fetch user and render view
    response.send("userView.mustache", user);
}

Create a Controller: Use annotations to define routes and handle requests.

@Path("/users")
public class UserController {
    @GET
    public List getAllUsers() {
        // Logic to fetch users...
    }
}

Define a Model: Create a class to represent your data.

public class User {
    private String name;
    private int age;
    
    // Getters and setters...
}

Conclusion

Jooby's MVC API offers a straightforward approach to building web applications by separating concerns into models, views, and controllers. It simplifies routing, supports dependency injection, and allows for easy view rendering, making it a powerful choice for developers looking to create efficient web applications in Java.