public void run()
{
while (!_abort) {
//Start stopwatch
lastCycle = DateTime.UtcNow.Ticks;
Console.Write("Updating..." + counter++ + "\n");
info.timestamp = Global.unixTime(DateTime.Now);
/////////////////////////////////////////////////
///
///Update bus info
///
/////////////////////////////////////////////////
//Send request to StreetEagle
HttpWebRequest req = (HttpWebRequest) WebRequest.Create(new Uri(GPS_URL));
req.Method = "POST";
req.ContentType = "text/xml; encoding=UTF-8";
req.Accept = "*/*";
req.Headers.Add(SOAP_PROPERTY,SOAP_VALUE);
using(StreamWriter sw = new StreamWriter(req.GetRequestStream())) {
sw.Write(String.Format(REQUEST_XML, idNumbers));
sw.Close();
}
//Get response
HttpWebResponse resp;
try {
resp = (HttpWebResponse) req.GetResponse();
} catch(WebException w) {
Console.WriteLine ("Error getting StreetEagle data!");
Console.WriteLine(w.ToString());
resp = (HttpWebResponse) w.Response;
//continue;
}
//Load XML
XmlDocument doc = new XmlDocument();
string xmlFromOutside = (new StreamReader(resp.GetResponseStream())).ReadToEnd();
doc.LoadXml(xmlFromOutside);
XPathNavigator nav = doc.CreateNavigator();
//Find all buses
XPathExpression busXpr = nav.Compile("//*[local-name()='List_Bus']");
XPathNodeIterator busItr = (XPathNodeIterator)nav.Evaluate(busXpr);
//For each bus
foreach (XPathNavigator n in busItr) {
//Get id number
int id = int.Parse(Global.getIntSegment(n.SelectSingleNode("./*[local-name()='VehicleID']").Value));
Bus bus = info.busInfo.Buses[id - Bus.MIN_BUS_ID];
//Get last update time
long time = Global.unixTime(DateTime.Parse(n.SelectSingleNode("./*[local-name()='DateTimeLoc']").Value));
//Skip this bus if it hasn't changed (this will happen a LOT)
if (bus.lastUpdated == time) continue;
else bus.lastUpdated = time;
//Check if running - can ignore the rest if not
bus.running = !n.SelectSingleNode("./*[local-name()='Status']").Value.Equals("Parked");
if (!bus.running) {
bus.lastLatitude = 0;
bus.lastLongitude = 0;
bus.lastStop = 0;
bus.nextStop = 0;
continue;
}
//Update location
bus.lastLatitude = bus.latitude;
bus.lastLongitude = bus.longitude;
bus.latitude = double.Parse(n.SelectSingleNode("./*[local-name()='Latitude']").Value);
bus.longitude = double.Parse(n.SelectSingleNode("./*[local-name()='Longitude']").Value);
bus.heading = int.Parse(n.SelectSingleNode("./*[local-name()='Heading']").Value);
bus.address = n.SelectSingleNode("./*[local-name()='Address']").Value;
bus.name = n.SelectSingleNode("./*[local-name()='Name']").Value;
if (bus.lastStop != 0)
bus.timeSinceLastStop = time - bus.stopCheckInTimes[bus.lastStop];
//Update stop
if (bus.lastLatitude != 0) {
//If this is not the first update for this bus, look for a stop
int stopAt = info.stopInfo.getStop(bus);
if (stopAt != 0 && stopAt != bus.lastStop) {
//Got to a stop
bus.lastStop = stopAt;
//Notify travel times
if (bus.route == 1) {
foreach (int stopId in Stop.BLUE_ROUTE) {
if (bus.stopCheckInTimes[stopId] != 0) //0 means haven't been there yet
info.stopInfo.stops[bus.lastStop].logTime(
stopId, time - bus.stopCheckInTimes[stopId]);
}
}
else if (bus.route == 2) {
foreach (int stopId in Stop.RED_ROUTE) {
if (bus.stopCheckInTimes[stopId] != 0) //0 means haven't been there yet
info.stopInfo.stops[bus.lastStop].logTime(
stopId, time - bus.stopCheckInTimes[stopId]);
}
}
//Here we are now, entertain us
bus.stopCheckInTimes[stopAt] = time;
bus.timeSinceLastStop = 0; //Time since last being at this stop is now 0
}//at stop
}
//Update route if this stop allows differentiation
bus.setRoute (Global.getRoute (bus.lastStop));
//Predict next stop
if (bus.lastStop != 0) {
int cachedNextStop = bus.nextStop;
bus.nextStop = Stop.getNextStop(bus.lastStop,bus.route);
if (bus.nextStop != cachedNextStop) {
if (cachedNextStop != 0 && bus.nextStop != 0) {
//Update what segments they're in
// info.stopInfo.stops[bus.nextStop].busesComing += 1;
// info.stopInfo.stops[cachedNextStop].busesComing -= 1;
}
}//next stop changed
}//predictions
}//for each bus in XML
//Find out how long until a bus arrives at each stop
//Time to get there is the time from the last stop to this destination
// (as determined by averages)
// minus how long it's been since the bus left the last stop
foreach (int stopId in info.stopInfo.stops.Keys) {
long bestTime = long.MaxValue;
foreach (Bus bus in info.busInfo.Buses) {
//Check that the stop and bus are on the same route
if (bus.lastStop == 0 || bus.route == 0) continue; //new bus
if (bus.route == 1 && Array.IndexOf(Stop.BLUE_ROUTE,stopId) == -1) continue; //wrong route
if (bus.route == 2 && Array.IndexOf(Stop.RED_ROUTE,stopId) == -1) continue; //wrong route
if (info.stopInfo.stops[stopId].travelTimes[bus.lastStop].Count == 0) continue; //no estimate
long timeToStop = (long)Global.average(info.stopInfo.stops[stopId].travelTimes[bus.lastStop])
- bus.timeSinceLastStop;
if (timeToStop <= bestTime)
bestTime = timeToStop;
}
info.stopInfo.stops[stopId].timeToNextBus = bestTime;
}
//Write info to string - which is then shared, so that this only happens once per update
using (StringWriter writer = new StringWriter()) {
serializer.Serialize(writer, info);
Global.xmlLock.EnterWriteLock();
try {
//Only one quick pointer-switch while the lock is held... oh yeah
sw.setStr(writer.ToString());
// sw.setStr(xmlFromOutside);
// sw.setStr(writer.ToString() + xmlFromOutside);
}finally { Global.xmlLock.ExitWriteLock(); }
}
//Wait for next update phase
if (UPDATE_INTERVAL > 0)
while ((DateTime.UtcNow.Ticks - lastCycle) / 10000 < UPDATE_INTERVAL)
Thread.Sleep(500);
}
}
