Spring Boot: Vaadin Hilla

Spring Boot View Vaadin Hilla

In Spring Boot, the Model-View-Controller (MVC) pattern is used to separate the application logic into three components; Vaadin Hilla is a Typescript-Java nice option for view.

📘 Vaadin Hilla

Vaadin Hilla offers a powerful and flexible way to build modern web applications by combining the strengths of Java and TypeScript.

With its type-safe communication, built-in security features, and support for reactive programming, Hilla is an excellent choice for developers looking to create robust, interactive, and maintainable web applications.

Spring Boot Request-Response Cycle

1 Vaadin Hilla

Overview

Vaadin Hilla is a full-stack framework that combines the strengths of Vaadin with modern frontend technologies, React Typescript, allowing us to build robust and interactive web applications.

1.1 Key Features

Vaadin Hilla Logo

Full-Stack Development

• Spring Boot Backend: Hilla integrates seamlessly with Spring Boot, leveraging its powerful backend capabilities for dependency injection, security, and more.
• React or Lit Frontend: Developers can use either React or Lit for the frontend, benefiting from the latest JavaScript frameworks and their extensive ecosystems.

Type-Safe Communication

• Auto-Generated TypeScript Interfaces: Hilla automatically generates TypeScript interfaces for your Java endpoints, ensuring type safety and reducing the risk of errors during development.

Security

• Built-in Security Features: Hilla includes built-in security features to protect your application from common web vulnerabilities, making it easier to develop secure web applications.

Client-Server Communication

• Efficient Data Exchange: Hilla facilitates efficient communication between the client and server, using Vaadin’s robust client-server communication mechanisms, such as those provided by the Atmosphere framework.

1.2 Development Approach

Java and TypeScript Integration: Hybrid Development, we can write backend code in Java and frontend code in TypeScript, allowing for a hybrid development approach that leverages the strengths of both languages.

Also, Reactive Models Hilla supports reactive programming models, making it easier to manage complex UI updates and ensure a responsive user interface.

1.3 Example Usage

Here is an example of how we might set up a simple Hilla application:

// Java Backend
@RestController
1@RequestMapping("/api")
public class MyController {
2    @GetMapping("/data")
    public List<MyData> getData() {
        // Return data from the backend
3        return myService.getData();
    }
}

1

Specify the base URL for the REST controller.

2

Define the HTTP GET endpoint to retrieve data.

3

Call the service method to fetch and return the data.

// TypeScript Frontend
1import { fetch } from '@vaadin/hilla';
2import { html, LitElement, property } from 'lit-element';

3@customElement('my-component')
class MyComponent extends LitElement {
4  @property({ type: Array }) data = [];

  async connectedCallback() {
5    super.connectedCallback();
6    this.data = await fetch('/api/data').json();
  }

  render() {
    return html`
      <ul>
        ${this.data.map(item => 
7            html`<li>${item.name}</li>`)}
      </ul>
    `;
  }
}

1

Import the fetch function from the @vaadin/hilla package.

2

Import necessary functions and classes from lit-element.

3

Define the custom element name for the component.

4

Declare a property to store the data, initialized as an empty array.

5

Call the parent class’s connectedCallback method.

6

Fetch data from the backend API and update the component’s data property.

7

Render a list of ite

1.4 Integration and Tools

Extensive UI Components: Hilla applications can use Vaadin’s extensive set of UI components and themes, ensuring a consistent and professional look and feel. Spring Boot Integration.

Seamless Integration: Hilla integrates seamlessly with Spring Boot, allowing developers to leverage Spring’s dependency injection, security features, and other capabilities.