--- android/TrainInfoService/src/dk/thoerup/traininfoservice/banedk/DepartureFetcher.java 2009/09/10 18:11:53 307 +++ android/TrainInfoService/src/dk/thoerup/traininfoservice/banedk/DepartureFetcher.java 2010/07/10 10:53:44 978 @@ -1,110 +1,270 @@ package dk.thoerup.traininfoservice.banedk; -import java.sql.Connection; -import java.sql.ResultSet; -import java.sql.Statement; -import java.util.ArrayList; + import java.util.Collections; import java.util.List; +import java.util.Map; +import java.util.logging.Logger; +import com.gargoylesoftware.htmlunit.BrowserVersion; import com.gargoylesoftware.htmlunit.WebClient; import com.gargoylesoftware.htmlunit.html.DomNodeList; import com.gargoylesoftware.htmlunit.html.HtmlElement; import com.gargoylesoftware.htmlunit.html.HtmlPage; -import dk.thoerup.traininfoservice.DBConnection; +import dk.thoerup.circuitbreaker.CircuitBreaker; +import dk.thoerup.circuitbreaker.CircuitBreakerManager; +import dk.thoerup.traininfoservice.StationBean; +import dk.thoerup.traininfoservice.StationDAO; +import dk.thoerup.traininfoservice.Statistics; public class DepartureFetcher { + + enum TrainType{ + STOG, + REGIONAL + } + + Logger logger = Logger.getLogger(DepartureFetcher.class.getName()); + + Map cache; + + StationDAO stationDao = new StationDAO(); + + private boolean useTempSite; + + public DepartureFetcher(boolean tempSite, int cacheTimeout) { + useTempSite = tempSite; + cache = new TimeoutMap(cacheTimeout); + } + + - @SuppressWarnings("unchecked") - public List lookupDepartures(int stationID) throws Exception { - List departureList = new ArrayList(); + + public DepartureBean cachedLookupDepartures(int stationID, boolean arrival) throws Exception { + final String key = "" + stationID + ":" + arrival; + /* + DepartureBean departureBean = cache.get(key); + - Connection conn = null; - try - { - conn = DBConnection.getConnection(); - - String SQL = "SELECT stationcode_fjrn, stationcode_stog FROM trainstations WHERE id=" + stationID; - Statement stmt = conn.createStatement(); - ResultSet rs = stmt.executeQuery(SQL); - - if (rs.next()) { - String code = rs.getString( 1 ); - if (! rs.wasNull() ) { - List list = lookupDepartures(code, "FJRN"); - departureList.addAll(list); - } - - code = rs.getString(2); - if (! rs.wasNull() ) { - List list = lookupDepartures(code, "S2"); - departureList.addAll(list); - } - Collections.sort( departureList ); - - } - - } finally { - if (conn != null && !conn.isClosed() ) { - conn.close(); - } + if (departureBean == null) { + departureBean = lookupDepartures(stationID,arrival); + cache.put(key, departureBean); + } else { + Statistics.getInstance().incrementDepartureCacheHits(); + logger.info("Departure: Cache hit " + key); //remove before production } + return departureBean;*/ - return departureList; + return lookupDepartures(stationID,arrival); + } + + + public DepartureBean lookupDepartures(int stationID, boolean arrival) throws Exception { + + DepartureBean departureBean = new DepartureBean(); + + StationBean station = stationDao.getById(stationID); + + if (station.getRegional() != null) { + DepartureBean tempBean = lookupDepartures(station.getRegional(), TrainType.REGIONAL, arrival); + departureBean.departureEntries.addAll( tempBean.departureEntries ); + departureBean.notifications.addAll(tempBean.notifications); + } + + if (station.getStrain() != null) { + DepartureBean tempBean = lookupDepartures(station.getStrain(), TrainType.STOG, arrival); + departureBean.departureEntries.addAll( tempBean.departureEntries ); + departureBean.notifications.addAll(tempBean.notifications); + } + + Collections.sort( departureBean.departureEntries ); + + + return departureBean; + } + + public DepartureBean lookupDepartures(String stationcode, TrainType type, boolean arrival) throws Exception { + if (useTempSite == false) { + return lookupDeparturesNormalSite(stationcode, type, arrival); + } else { + //return lookupDeparturesFromTemporarySite(stationcode, type); + //TODO: find out what to to if they ever put a temp site up on trafikinfo.bane.dk + return null; + } } - public List lookupDepartures(String stationcode, String type) throws Exception { + private String getTypeString(TrainType type) { + switch (type) { + case STOG: + return "S-Tog"; + case REGIONAL: + return "Fjerntog"; + default: + return ""; //Can not happen + } + } + + public DepartureBean lookupDeparturesNormalSite(String stationcode, TrainType type, boolean arrival) throws Exception { - List departureList = new ArrayList(); + DepartureBean departureBean = new DepartureBean(); - final WebClient webClient = new WebClient(); - webClient.setTimeout(1000); - webClient.setJavaScriptEnabled(false); - - final HtmlPage page = webClient.getPage("http://www.bane.dk/visStation.asp?ArtikelID=4275&W=" + type + "&S=" + stationcode); - - HtmlElement table = page.getElementById("afgangtabel"); - DomNodeList tableRows = table.getElementsByTagName("tr"); - - for (HtmlElement currentRow : tableRows) { - String rowClass = currentRow.getAttribute("class"); - if (rowClass != null && rowClass.toLowerCase().contains("station") ) { - DomNodeList fields = currentRow.getElementsByTagName("td"); - - DepartureBean departure = new DepartureBean(); - - String time = fields.get(0).asText(); - departure.setTime(time); - - int updated = extractUpdated( fields.get(1) ); - departure.setUpdated(updated); - - String trainNumber = fields.get(2).asText(); - departure.setTrainNumber(trainNumber); - - String destination = fields.get(3).asText(); - departure.setDestination(destination); - - String origin = fields.get(4).asText(); - departure.setOrigin(origin); - - String location = fields.get(5).asText(); - departure.setLocation(location); - - String status = fields.get(6).asText(); - departure.setStatus(status); - - String note = fields.get(7).asText(); - departure.setNote(note); - - departureList.add(departure); + final WebClient webClient = new WebClient( BrowserVersion.FIREFOX_3 ); + webClient.setTimeout(2500); + webClient.setJavaScriptEnabled(false); + + + String typeString = getTypeString(type); + String arrivalDeparture = (arrival==false) ? "Afgang" : "Ankomst"; + + //String uri = "http://www.bane.dk/visStation.asp?ArtikelID=4275&W=" + type + "&S=" + stationcode; + String uri = "http://trafikinfo.bane.dk/Trafikinformation/AfgangAnkomst/" + arrivalDeparture + "/" + stationcode + "/" + typeString + "/UdvidetVisning"; + + //logger.info("URI: " + uri); + HtmlunitInvocation wrapper = new HtmlunitInvocation(webClient, uri); + CircuitBreaker breaker = CircuitBreakerManager.getManager().getCircuitBreaker("banedk"); + + HtmlPage page = (HtmlPage) breaker.invoke(wrapper); + + String tableName = arrival == false ? "afgangtabel" : "ankomsttabel"; + HtmlElement table = page.getElementById(tableName); + + if (table != null) { + DomNodeList tableRows = table.getElementsByTagName("tr"); + + for (HtmlElement currentRow : tableRows) { + String rowClass = currentRow.getAttribute("class"); + if (rowClass != null && rowClass.toLowerCase().contains("station") ) { + DomNodeList fields = currentRow.getElementsByTagName("td"); + + DepartureEntry departure = new DepartureEntry(); + + String time = fields.get(0).asText(); + if (time.equals("")) + time = "0:00"; //Bane.dk bug work-around + departure.setTime(time); + + int updated = extractUpdated( fields.get(1) ); + departure.setUpdated(updated); + + String trainNumber = fields.get(2).asText(); + if (type == TrainType.STOG) //If it is S-train we need to extract the trainNumber + trainNumber = trainNumber + " " + extractTrainNumber(fields.get(2)); + departure.setTrainNumber(trainNumber); + + String destination = fields.get(3).asText(); + departure.setDestination(destination); + + String origin = fields.get(4).asText(); + departure.setOrigin(origin); + + String location = fields.get(5).asText(); + departure.setLocation(location); + + String status = fields.get(6).asText().trim(); + departure.setStatus(status); + + String note = extractNote( fields.get(7) ); + departure.setNote(note); + + departure.setType(typeString); + + departureBean.departureEntries.add( departure ); + } + } + } else { + logger.warning("No departures found for station=" + stationcode + ", type=" + type); + } + + HtmlElement notifDiv = page.getElementById("station_planlagte_text"); + if (notifDiv != null) { + + DomNodeList tables = notifDiv.getElementsByTagName("table"); + for (HtmlElement tab : tables) { + + DomNodeList anchors = tab.getElementsByTagName("a"); + if (anchors.size() == 2) { + departureBean.notifications.add( anchors.get(1).getTextContent() ); + } } + } - return departureList; + + webClient.closeAllWindows(); + + return departureBean; } + /* + @Deprecated + public List lookupDeparturesFromTemporarySite(String stationcode, String type) throws Exception { + + List departureList = new ArrayList(); + + final WebClient webClient = new WebClient(BrowserVersion.FIREFOX_3); + webClient.setTimeout(2500); + webClient.setJavaScriptEnabled(false); + + + String uri = "http://bane.dk/lite/station.asp?w=" + type + "&s=" + stationcode; + + HtmlunitInvocation wrapper = new HtmlunitInvocation(webClient, uri); + CircuitBreaker breaker = CircuitBreakerManager.getManager().getCircuitBreaker("banedk"); + + HtmlPage page = (HtmlPage) breaker.invoke(wrapper); + + HtmlElement table = page.getElementById("traf_afgang"); + + if (table != null) { + DomNodeList tableRows = table.getElementsByTagName("tr"); + + boolean isFirst = true; + + for (HtmlElement currentRow : tableRows) { + if (isFirst == true) { //skip table headers + isFirst = false; + continue; + } + + DomNodeList fields = currentRow.getElementsByTagName("td"); + + DepartureBean departure = new DepartureBean(); + + String time = fields.get(0).asText().trim(); + + if (time.equals("")) + time = "0:00"; //Bane.dk bug work-around + departure.setTime(time); + + + String trainNumber = fields.get(1).asText(); + departure.setTrainNumber(trainNumber); + + String destination = fields.get(2).asText(); + departure.setDestination(destination); + + String origin = fields.get(3).asText(); + departure.setOrigin(origin); + + String status = fields.get(4).asText(); + departure.setStatus(status); + + String note = fields.get(5).asText(); + departure.setNote(note); + + departureList.add(departure); + } + } else { + logger.warning("No departures found for station=" + stationcode + ", type=" + type); + } + webClient.closeAllWindows(); + + + return departureList; + }*/ + + private int extractUpdated(HtmlElement updatedTd) { //extract the digit (in this case: 4) from "media/trafikinfo/opdater4.gif" int updated = -1; @@ -123,8 +283,29 @@ return updated; } + private String extractNote(HtmlElement noteTd) { + String note = noteTd.asText().trim(); + + List elems = noteTd.getElementsByAttribute("span", "class", "bemtype"); + if (elems.size() > 0 && note.charAt(note.length()-1) == 'i') + note = note.substring(0,note.length() -1 ); + + return note; + } + + private String extractTrainNumber(HtmlElement trainTd) { + HtmlElement anchorElement = trainTd.getElementsByTagName("a").get(0); + String href = anchorElement.getAttribute("href"); + + int pos = href.lastIndexOf('/'); + String number = href.substring(pos+1); + + return number; + } + //test - public static void main(String args[]) throws Exception{ + /* + public static void main(String args[]) throws Exception { DepartureFetcher f = new DepartureFetcher(); List deps = f.lookupDepartures("AR", "FJRN"); for(DepartureBean d : deps) { @@ -133,5 +314,5 @@ } System.out.println("--------------------------"); - } + }*/ }