HelloWorldApplication.java

/*
 * Copyright 2016 Laird Nelson. Released under the terms of the MIT license: https://opensource.org/licenses/MIT
 */
package developer;

import java.util.Collections;
import java.util.Set;

import javax.ws.rs.core.Application;

import javax.enterprise.context.ApplicationScoped;

@ApplicationScoped
public class HelloWorldApplication extends Application {

  public HelloWorldApplication() {
    super();
  }

  @Override
  public Set<Class<?>> getClasses() {
    return Collections.singleton(HelloWorldResource.class);
  } 
}

HelloWorldResource.java

/*
 * Copyright 2016 Laird Nelson. Released under the terms of the MIT license: https://opensource.org/licenses/MIT
 */
package developer;

import javax.enterprise.context.RequestScoped;

import javax.inject.Inject;

import javax.ws.rs.core.Application;

import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;

@Path("hello")
@RequestScoped
public class HelloWorldResource {  

  @GET
  @Produces("text/plain")
  public String hello() {
    return "Hello, world!";
  }
  
}