package de.jochenbrissier.backyard.web;
import java.io.IOException;
import java.text.ParseException;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.json.JSONObject;
import de.jochenbrissier.backyard.core.Backyard;
/**
* This servlet is the communications backend to the jquery plugin
*<br>
*set this servelt in your web.xml to use the plugin.
*<br>
*This supports Glassfish v3 and Jetty 6
*
*
*
*
* @author jochen brissier
*
*/
@WebServlet(asyncSupported = true)
public class BackyardServlet extends HttpServlet {
Log log = LogFactory.getLog(BackyardServlet.class);
@Override
public void init() throws ServletException {
Backyard.autoDedectImpl(this);
}
@Override
protected void service(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
log.debug("enter service backyard servlet");
log.debug("enter BackyardServlet");
// Backyard API
Backyard backyard = new Backyard(req, resp);
backyard.setServlet(this);
// json obj
String data = req.getParameter("data");
try {
log.debug("Parsing JSON: " + data);
JSONObject json = new JSONObject(data);
// get function from request json
String function = json.getString("fn");
if (function.matches("handshake")) {
log.debug("Handshake");
//TODO: GENERATE AN ID OR SEND THE SESSION ID TO THE CLIENT
resp.getWriter().print("{\"status\":\"OK\",\"id\":\""+req.getSession().getId()+"\"}");
return;
}
if (function.matches("comet")) {
log.debug("comet");
backyard.startAsync();
}
//if the json obj contains the function listen
if (function.matches("listen")) {
log.debug("listen");
listenChannel(req, resp, json, backyard);
}
//if the json obj contains the function send
if (function.matches("send")) {
log.debug("sendtochannel");
JSONObject channeldata = json.getJSONObject("channel");
try {
backyard.getChannel(channeldata.getString("channel_name"))
.sendMessage(json.getString("data"));
} catch (Exception e) {
e.printStackTrace();
}
}
} catch (ParseException e) {
log.warn(e);
}
}
private void send(HttpServletRequest req, HttpServletResponse resp,
JSONObject json) {
}
private void listenChannel(HttpServletRequest req,
HttpServletResponse resp, JSONObject json, Backyard backyard) {
String channelName = json.getJSONObject("channel").getString(
"channel_name");
backyard.listenToChannel(channelName);
}
}