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package dk.thoerup.traininfoservice.banedk; |
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import java.net.URL; |
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import java.sql.SQLException; |
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import java.util.HashMap; |
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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 net.sf.jsr107cache.Cache; |
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import net.sf.jsr107cache.CacheException; |
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import net.sf.jsr107cache.CacheManager; |
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import org.jsoup.nodes.Document; |
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import org.jsoup.nodes.Element; |
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import org.jsoup.select.Elements; |
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import com.google.appengine.api.memcache.jsr107cache.GCacheFactory; |
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import dk.thoerup.android.traininfo.common.TimetableBean; |
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import dk.thoerup.android.traininfo.common.TimetableEntry; |
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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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Cache cache; |
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Cache 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 useAzureSite; |
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private int replyTimeout; |
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@SuppressWarnings("unchecked") |
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public TimetableFetcher(boolean azureSite, int cacheTimeout, int replyTimeout) { |
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useAzureSite = azureSite; |
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this.replyTimeout = replyTimeout; |
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Map props = new HashMap(); |
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props.put(GCacheFactory.EXPIRATION_DELTA_MILLIS, cacheTimeout); |
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try { |
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cache = CacheManager.getInstance().getCacheFactory().createCache(props); |
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} catch (CacheException e) { |
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logger.log(Level.WARNING, "error creating cache", e); |
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} |
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props = new HashMap(); |
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props.put(GCacheFactory.EXPIRATION_DELTA_MILLIS, 3*60*60*1000); |
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try { |
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stationCache = CacheManager.getInstance().getCacheFactory().createCache(props); |
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} catch (CacheException e) { |
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logger.log(Level.WARNING, "error creating cache", e); |
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} |
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} |
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TimetableBean cachedLookupTimetable(String trainID, String type) throws Exception { |
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String key = trainID+type; |
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TimetableBean list = (TimetableBean) 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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TimetableBean lookupTimetable(String trainID, String type) throws Exception { |
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if (useAzureSite == true ){ |
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return lookupTimetableAzureSite(trainID, type); |
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} else { |
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return lookupTimetableWwwSite(trainID, type); |
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} |
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} |
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int getStationId(String name) { |
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Integer id = (Integer) stationCache.get(name); |
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if (id == null) { |
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id = stationDao.getIdByName(name); |
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stationCache.put(name, id); |
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} |
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return id; |
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} |
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TimetableBean lookupTimetableAzureSite(String trainID, String type) throws Exception { |
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TimetableBean timetableBean = new TimetableBean(); |
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String url = "http://trafikinfo.bane.dk/TrafikInformation/Ruteplan/" + trainID; |
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logger.fine("URL:" + url); |
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JsoupInvocation wrapper = new JsoupInvocation( new URL(url) , replyTimeout); |
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CircuitBreaker breaker = CircuitBreakerManager.getManager().getCircuitBreaker("banedk"); |
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Document doc = (Document) breaker.invoke(wrapper); |
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boolean currentStation = false; |
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boolean currentStationSaved = false; |
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Elements tables = doc.getElementsByClass("Rute"); |
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if (tables.size() == 1) { |
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Element timetable = tables.get(0); |
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Elements rows = timetable.getElementsByTag("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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Element row = rows.get(i); |
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Elements fields = row.getElementsByTag("td"); |
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if (currentStationSaved == false && fields.get(0).attr("class").equalsIgnoreCase("Tidsstreg")) { |
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currentStation = true; |
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continue; |
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} |
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TimetableEntry entry = new TimetableEntry(); |
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String station = fields.get(0).text() ; |
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if (station.equals("København")) |
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station = "København H"; //correct inconsistency in naming |
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entry.setStation( station ); |
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entry.setArrival( fields.get(1).text() ); |
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entry.setDeparture( fields.get(2).text() ); |
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boolean cancelled = fields.get(3).text().equalsIgnoreCase("aflyst"); |
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entry.setCancelled(cancelled); |
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if (currentStation == true && currentStationSaved == false ) { |
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entry.setCurrent(currentStation); |
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currentStationSaved = true; |
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} |
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//TODO: fix this to new setStationEntry |
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//entry.setStationId( getStationId( station )); |
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timetableBean.entries.add(entry); |
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} |
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//TODO: There is an off-by-one error in this cancelled parser thingie |
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final String cancelledString = "Aflyst"; |
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for (int i=0;i<timetableBean.entries.size(); i++) { //handle cancelled labels |
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final int lastIdx = (timetableBean.entries.size() - 1); |
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TimetableEntry current = timetableBean.entries.get(i); |
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if (current.isCancelled()) { |
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if (i == 0) { |
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current.setDeparture(cancelledString); |
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} else if (i == lastIdx) { |
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current.setArrival(cancelledString); |
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} else if (i>0 && i<lastIdx) { |
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TimetableEntry next = timetableBean.entries.get(i+1); |
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TimetableEntry prev = timetableBean.entries.get(i-1); |
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if (next.isCancelled()) |
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current.setDeparture(cancelledString); |
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if (prev.isCancelled()) |
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current.setArrival(cancelledString); |
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} |
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} |
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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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return timetableBean; |
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} |
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TimetableBean lookupTimetableWwwSite(String trainID, String type) throws Exception { |
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TimetableBean timetableBean = new TimetableBean(); |
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String url = "http://www.bane.dk/visRute.asp?W=" + type + "&TogNr=" + trainID + "&artikelId=4276"; |
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logger.fine("URL:" + url); |
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JsoupInvocation wrapper = new JsoupInvocation( new URL(url) , replyTimeout); |
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CircuitBreaker breaker = CircuitBreakerManager.getManager().getCircuitBreaker("banedk"); |
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Document doc = (Document) breaker.invoke(wrapper); |
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boolean currentStation = false; |
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boolean currentStationSaved = false; |
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Elements tables = doc.getElementsByClass("Rute"); |
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if (tables.size() == 1) { |
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Element timetable = tables.get(0); |
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Elements rows = timetable.getElementsByTag("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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Element row = rows.get(i); |
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Elements fields = row.getElementsByTag("td"); |
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if (currentStationSaved == false && fields.get(0).attr("class").equalsIgnoreCase("Tidsstreg")) { |
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currentStation = true; |
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continue; |
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} |
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TimetableEntry entry = new TimetableEntry(); |
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String station = DepartureFetcher.cleanText( fields.get(0).text() ) ; |
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if (station.equals("København")) |
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station = "København H"; //correct inconsistency in naming |
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String arrival = DepartureFetcher.cleanText( fields.get(1).text() ); |
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String departure = DepartureFetcher.cleanText( fields.get(2).text() ); |
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entry.setStation( station ); |
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entry.setArrival( arrival ); |
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entry.setDeparture( departure ); |
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if (currentStation == true && currentStationSaved == false ) { |
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entry.setCurrent(currentStation); |
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currentStationSaved = true; |
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} |
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//TODO: fix this to new setStationEntry |
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//entry.setStationId( getStationId( station )); |
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timetableBean.entries.add(entry); |
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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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return timetableBean; |
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} |
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} |
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