/**
* Copyright 2015 ArcBees 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.arcbees.gaestudio.server;
import java.io.IOException;
import javax.inject.Inject;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import com.arcbees.gaestudio.server.channel.ClientService;
import com.google.appengine.api.channel.ChannelPresence;
import com.google.appengine.api.channel.ChannelService;
import com.google.appengine.api.channel.ChannelServiceFactory;
public class ConnectFilter implements Filter {
private final ClientService clientService;
@Inject
ConnectFilter(
ClientService clientService) {
this.clientService = clientService;
}
@Override
public void init(FilterConfig filterConfig) throws ServletException {
}
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
throws IOException, ServletException {
MultiReadHttpServletRequest multiReadRequest = new MultiReadHttpServletRequest((HttpServletRequest) request);
manageClientPresence(multiReadRequest);
chain.doFilter(multiReadRequest, response);
}
@Override
public void destroy() {
}
private void manageClientPresence(MultiReadHttpServletRequest multiReadRequest) throws IOException {
ChannelPresence presence = getChannelPresence(multiReadRequest);
String clientId = presence.clientId();
if (presence.isConnected()) {
clientService.storeClient(clientId);
} else {
clientService.removeClient(clientId);
}
}
private ChannelPresence getChannelPresence(MultiReadHttpServletRequest multiReadRequest) throws IOException {
ChannelService channelService = ChannelServiceFactory.getChannelService();
return channelService.parsePresence(multiReadRequest);
}
}