/*
 * Copyright 2016 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.example.appengine.channel;

import com.google.appengine.api.channel.ChannelPresence;
import com.google.appengine.api.channel.ChannelService;
import com.google.appengine.api.channel.ChannelServiceFactory;

import java.io.IOException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class ChannelPresenceServlet extends HttpServlet {
  @Override
  public void doPost(HttpServletRequest req, HttpServletResponse resp)
      throws IOException {
    //[START channel_presence]
    ChannelService channelService = ChannelServiceFactory.getChannelService();
    ChannelPresence presence = channelService.parsePresence(req);
    //[END channel_presence]

    System.out.println("Client ID: " + presence.clientId()
        + ", Connected: " + presence.isConnected());
    resp.setStatus(HttpServletResponse.SC_OK);
  }
}
