Chapter 5. Configuring the GreetingController to return a JSON response

Procedure

1. Expand your GreetingController class as shown in the example. The expanded class returns a JSON-formatted response that contains a greeting and a name. Note, that you must import the PathVariable annotation class from Spring Web to ensure that your configuration works correctly:

   src/main/java/org/acme/spring/web/GreetingController.java

   import org.springframework.web.bind.annotation.GetMapping;
   import org.springframework.web.bind.annotation.PathVariable;
   import org.springframework.web.bind.annotation.RequestMapping;
   import org.springframework.web.bind.annotation.RestController;
   
   @RestController
   @RequestMapping("/greeting")
   public class GreetingController {
   
       @GetMapping
       public String hello() {
           return "hello";
       }
   
       @GetMapping("/{name}")
       public Greeting hello(@PathVariable(name = "name") String name) {
           return new Greeting("hello " + name);
       }
   
       public static class Greeting {
           private final String message;
   
           public Greeting(String message) {
               this.message = message;
           }
   
           public String getMessage(){
               return message;
           }
       }
   }

   Copy to Clipboard Toggle word wrap

1. When you make changes to your REST endpoint, you must also update the class file that contains the unit tests for your REST endpoint:

   src/test/java/org/acme/spring/web/GreetingControllerTest.java

   package org.acme.spring.web;
   
   import io.quarkus.test.junit.QuarkusTest;
   import org.junit.jupiter.api.Test;
   
   import static io.restassured.RestAssured.given;
   import static org.hamcrest.CoreMatchers.is;
   
   @QuarkusTest
   public class GreetingControllerTest {
   
       @Test
       public void testHelloEndpoint() {
           given()
             .when().get("/greeting/quarkus")
             .then()
               .statusCode(200)
               .body("message", is("hello quarkus"));
       }
   
   }

   Copy to Clipboard Toggle word wrap

   Note, that when you use the Spring Web compatibility layer in Quarkus, the com.fasterxml:jackson.core dependency is automatically added to the classpath of your application and configured.