40.5. 콜백 접근 방식을 사용하여 비동기 클라이언트 구현

public interface javax.xml.ws.AsyncHandler
{
  void handleResponse(Response<T> res)
}

package demo.hw.client;

import javax.xml.ws.AsyncHandler;
import javax.xml.ws.Response;

import org.apache.hello_world_async_soap_http.types.*;

public class GreeterAsyncHandler implements AsyncHandler<GreetMeSometimeResponse>
{
  private GreetMeSometimeResponse reply;

  public void handleResponse(Response<GreetMeSometimeResponse>
                             response)
  {
    try
    {
      reply = response.get();
    }
    catch (Exception ex)
    {
      ex.printStackTrace();
    }
  }

  public String getResponse()
  {
    return reply.getResponseType();
  }
}

package demo.hw.client;

import java.io.File;
import java.util.concurrent.Future;

import javax.xml.namespace.QName;
import javax.xml.ws.Response;

import org.apache.hello_world_async_soap_http.*;

public final class Client {
  ...

  public static void main(String args[]) throws Exception
  {
    ...
    // Callback approach
    GreeterAsyncHandler callback = new GreeterAsyncHandler();

    Future<?> response =
      port.greetMeSometimeAsync(System.getProperty("user.name"),
                                callback);
    while (!response.isDone())
    {
      // Do some work
    }
    resp = callback.getResponse();
    ...
    System.exit(0);
  }
}