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package dk.thoerup.traininfoservice.banedk; |
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import java.io.IOException; |
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import java.net.URL; |
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import java.sql.SQLException; |
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import java.util.ArrayList; |
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import java.util.List; |
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import java.util.Map; |
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import java.util.logging.Level; |
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import java.util.logging.Logger; |
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import com.gargoylesoftware.htmlunit.BrowserVersion; |
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import com.gargoylesoftware.htmlunit.Page; |
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import com.gargoylesoftware.htmlunit.RefreshHandler; |
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import com.gargoylesoftware.htmlunit.WebClient; |
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import com.gargoylesoftware.htmlunit.html.DomNodeList; |
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import com.gargoylesoftware.htmlunit.html.HtmlElement; |
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import com.gargoylesoftware.htmlunit.html.HtmlPage; |
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import dk.thoerup.circuitbreaker.CircuitBreaker; |
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import dk.thoerup.circuitbreaker.CircuitBreakerManager; |
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import dk.thoerup.traininfoservice.StationDAO; |
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import dk.thoerup.traininfoservice.Statistics; |
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public class TimetableFetcher { |
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class NullRefreshHandler implements RefreshHandler { |
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public void handleRefresh(Page arg0, URL arg1, int arg2) throws IOException { |
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} |
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} |
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Map<String, List<TimetableBean>> cache; |
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Map<String, Integer> stationCache; |
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StationDAO stationDao = new StationDAO(); |
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Logger logger = Logger.getLogger(TimetableFetcher.class.getName()); |
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private boolean useTempSite; |
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public TimetableFetcher(boolean tmpSite, int cacheTimeout) { |
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useTempSite = tmpSite; |
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cache = new TimeoutMap<String,List<TimetableBean>>(cacheTimeout); |
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stationCache = new TimeoutMap<String,Integer>( 3*60*60*1000 ); |
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} |
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List<TimetableBean> cachedLookupTimetable(String trainID, String type) throws Exception { |
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String key = trainID+type; |
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List<TimetableBean> list = cache.get(key); |
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if (list == null) { |
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list = lookupTimetable(trainID,type); |
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cache.put(key, list); |
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} else { |
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Statistics.getInstance().incrementTimetableCacheHits(); |
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logger.info("Timetable: Cache hit " + trainID); |
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} |
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return list; |
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} |
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List<TimetableBean> lookupTimetable(String trainID, String type) throws Exception { |
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if (useTempSite == false ){ |
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return lookupTimetableRealSite(trainID, type); |
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} else { |
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return new ArrayList<TimetableBean>(); // no timetable data on temp site |
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} |
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} |
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int getStationId(String name) { |
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Integer id = stationCache.get(name); |
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if (id == null) { |
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try { |
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id = stationDao.getIdByName(name); |
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stationCache.put(name, id); |
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} catch (SQLException e) { |
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logger.log(Level.SEVERE, "getStationId failed", e); |
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id = -1; |
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} |
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} |
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return id; |
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} |
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List<TimetableBean> lookupTimetableRealSite(String trainID, String type) throws Exception { |
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List<TimetableBean> timetableList = new ArrayList<TimetableBean>(); |
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String url = "http://www.bane.dk/visRute.asp?W=" + type + "&TogNr=" + trainID + "&artikelId=4276"; |
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final WebClient webClient = new WebClient(BrowserVersion.FIREFOX_3); |
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webClient.setTimeout(2500); |
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webClient.setJavaScriptEnabled(false); |
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webClient.setRefreshHandler( new NullRefreshHandler() ); |
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webClient.setCssEnabled(false); |
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HtmlunitInvocation wrapper = new HtmlunitInvocation(webClient, url); |
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CircuitBreaker breaker = CircuitBreakerManager.getManager().getCircuitBreaker("banedk"); |
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HtmlPage page = (HtmlPage) breaker.invoke(wrapper); |
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boolean currentStation = false; |
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boolean currentStationSaved = false; |
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List<HtmlElement> tables = page.getDocumentElement().getElementsByAttribute("table", "class", "Rute"); |
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if (tables.size() == 1) { |
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HtmlElement timetable = tables.get(0); |
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DomNodeList<HtmlElement> rows = timetable.getElementsByTagName("tr"); |
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for (int i=0; i<rows.size(); i++) { |
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if (i==0) //First row is column headers |
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continue; |
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HtmlElement row = rows.get(i); |
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DomNodeList<HtmlElement> fields = row.getElementsByTagName("td"); |
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if (currentStationSaved == false && fields.get(0).getAttribute("class").equalsIgnoreCase("Tidsstreg")) { |
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currentStation = true; |
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continue; |
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} |
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TimetableBean bean = new TimetableBean(); |
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String station = fields.get(0).asText() ; |
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if (station.equals("København")) |
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station = "København H"; //correct inconsistency in naming |
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bean.setStation( station ); |
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bean.setArrival( fields.get(1).asText() ); |
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bean.setDeparture( fields.get(2).asText() ); |
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if (currentStation == true && currentStationSaved == false ) { |
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bean.setCurrent(currentStation); |
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currentStationSaved = true; |
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} |
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bean.setStationId( getStationId( station )); |
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timetableList.add(bean); |
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} |
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} else { |
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logger.warning("No time table found, trainID=" + trainID + " type=" + type); |
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} |
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webClient.closeAllWindows(); |
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return timetableList; |
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} |
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} |