Search⌘ K
AI Features
Home
Courses
Build E-Commerce Apps with Reactive Programming in Spring Boot

Crafting a REST Controller

Explore how to create a Spring WebFlux REST controller that handles HTTP POST requests with JSON payloads. Understand integrating Spring AMQP to publish messages via RabbitMQ, managing blocking API calls with reactive schedulers, and testing messaging endpoints efficiently.

We'll cover the following...

Spring AMQP is dedicated to applying the “Spring way” to AMQP, a popular messaging protocol.

Adding AMQP dependency

The first step is to add Spring AMQP to our project’s build file:

XML
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-amqp</artifactId>
</dependency>
Adding Spring AMQP to the project

Defining the Spring WebFlux REST controller

Next, we need to create a Spring WebFlux REST controller class to respond to those POST calls:

Java
@RestController //1
public class SpringAmqpItemController {
    private static final Logger log = 
        LoggerFactory.getLogger(SpringAmqpItemController.class);
    private final AmqpTemplate template; //2
    public SpringAmqpItemController(AmqpTemplate template) {
        this.template = template;
    }
}
Configuring a reactive controller for AMQP messaging

Here’s a breakdown of the code above:

  1. In line 1, @RestController signals that this class focuses on consuming and rendering JSON payloads instead of rendering templates.

  2. In ...