PROGRAMMING
Php
Application
The service will handle GET requests for /greeting and return JSON response.
/**
* Rest Controller service
*
* Use start.spring.io to create a new Spring Web project.
* The service will handle GET requests for /greeting and return JSON response.
*
* Use start.spring.io to create a new Spring Web project.
*/
package com.minte9.demorest;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class App {
public static void main(String[] args) {
SpringApplication.run(App.class, args);
}
}
Resource
! In Spring RESTful web services, HTTP requests are handled by a resource controller.
/**
* Resource Controller - GreetingController
*
* HTTP requests are handled by a controller
* Components are identified by the @RestController annotation.
*/
package com.minte9.demorest;
import java.util.concurrent.atomic.AtomicLong;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class GreetingController {
private final AtomicLong counter = new AtomicLong();
@GetMapping("/greeting")
public Greeting greeting(
@RequestParam(value = "name", defaultValue = "World") String name
) {
Long id = counter.incrementAndGet();
String content = String.format("Hello %s!", name);
return new Greeting(id, content);
}
}
Representation
To model the greeting representation, create a resource representation class.
/**
* Resource Representation Class - Greeting
*/
package com.minte9.demorest;
class Greeting {
private final long id;
private final String content;
public Greeting(long id, String content) {
this.id = id;
this.content = content;
}
public long getId() {
return id;
}
public String getContent() {
return content;
}
}
Run
We can now build adn run the application and test the service.
./mvnw spring-boot:run
http://localhost:8080/greeting
# {"id":1,"content":"Hello World!"}
http://localhost:8080/greeting?name=User
# {"id":2,"content":"Hello User!"}
Port
You might want to set a different port from 8080 for you application.
# /restservice/src/main/resources/application.properties
server.port=9090
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