org.onebusaway.nyc.vehicle_tracking.webapp.servlets.VehicleLocationCollectionServlet.java Source code

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Here is the source code for org.onebusaway.nyc.vehicle_tracking.webapp.servlets.VehicleLocationCollectionServlet.java

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/**
 * Copyright (c) 2011 Metropolitan Transportation Authority
 *
 * 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 org.onebusaway.nyc.vehicle_tracking.webapp.servlets;

import java.io.BufferedReader;
import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.onebusaway.nyc.vehicle_tracking.services.VehicleLocationService;
import org.onebusaway.siri.model.Siri;
import org.onebusaway.siri.model.VehicleActivity;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.context.support.WebApplicationContextUtils;

import com.thoughtworks.xstream.XStream;

public class VehicleLocationCollectionServlet extends HttpServlet {

    private static final long serialVersionUID = 1L;

    private XStream _xstream;

    private VehicleLocationService _vehicleLocationService;

    @Autowired
    public void setVehicleLocationService(VehicleLocationService vehicleLocationService) {
        _vehicleLocationService = vehicleLocationService;
    }

    @Override
    public void init() {
        _xstream = new XStream();
        _xstream.processAnnotations(Siri.class);
        _xstream.processAnnotations(VehicleActivity.class);

        WebApplicationContext context = WebApplicationContextUtils.getWebApplicationContext(getServletContext());
        context.getAutowireCapableBeanFactory().autowireBean(this);

    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        BufferedReader reader = req.getReader();
        StringBuffer out = new StringBuffer();
        char[] buf = new char[4096];
        while (true) {
            int n = reader.read(buf);
            if (n == -1) {
                break;
            }
            out.append(new String(buf, 0, n));
        }
        String body = out.toString();

        Siri siri = (Siri) _xstream.fromXML(body);
        _vehicleLocationService.handleVehicleLocation(siri, body);

        resp.setStatus(200);
        resp.setContentType("text/html;charset=UTF-8");
        ServletOutputStream writer = resp.getOutputStream();
        writer.print("ok");
        writer.close();
    }
}