traininfoservice/banedk/TimetableFetcher.java

package dk.thoerup.traininfoservice.banedk;


import java.net.URL;
import java.sql.SQLException;
import java.util.HashMap;
import java.util.Map;
import java.util.logging.Level;
import java.util.logging.Logger;

import net.sf.jsr107cache.Cache;
import net.sf.jsr107cache.CacheException;
import net.sf.jsr107cache.CacheManager;

import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;

import com.google.appengine.api.memcache.jsr107cache.GCacheFactory;

import dk.thoerup.android.traininfo.common.TimetableBean;
import dk.thoerup.android.traininfo.common.TimetableEntry;
import dk.thoerup.circuitbreaker.CircuitBreaker;
import dk.thoerup.circuitbreaker.CircuitBreakerManager;
import dk.thoerup.traininfoservice.StationDAO;
import dk.thoerup.traininfoservice.Statistics;

public class TimetableFetcher {

                
        Cache cache; 
        Cache stationCache;

        StationDAO stationDao = new StationDAO();
        
        
        Logger logger = Logger.getLogger(TimetableFetcher.class.getName());
        
        private boolean useAzureSite;
        private int replyTimeout;
        
        @SuppressWarnings("unchecked")
        public TimetableFetcher(boolean azureSite, int cacheTimeout, int replyTimeout) {
                useAzureSite = azureSite;
                this.replyTimeout = replyTimeout;               
                
        Map props = new HashMap();
        props.put(GCacheFactory.EXPIRATION_DELTA_MILLIS, cacheTimeout);        
                
                try {
            cache = CacheManager.getInstance().getCacheFactory().createCache(props);            
        } catch (CacheException e) {
                logger.log(Level.WARNING, "error creating cache", e);
        }
        
        props = new HashMap();
        props.put(GCacheFactory.EXPIRATION_DELTA_MILLIS, 3*60*60*1000);        
                
                try {
                        stationCache = CacheManager.getInstance().getCacheFactory().createCache(props);            
        } catch (CacheException e) {
                logger.log(Level.WARNING, "error creating cache", e);
        }               
        }
        
        
        TimetableBean cachedLookupTimetable(String trainID, String type) throws Exception {
                String key = trainID+type;
                TimetableBean list = (TimetableBean) cache.get(key);
                
                if (list == null) {
                        list = lookupTimetable(trainID,type);
                        cache.put(key, list);
                } else {
                        Statistics.getInstance().incrementTimetableCacheHits();
                        logger.info("Timetable: Cache hit " + trainID); 
                }
                return list;
        }
        
        TimetableBean lookupTimetable(String trainID, String type) throws Exception {
                if (useAzureSite == true ){
                        return lookupTimetableAzureSite(trainID, type);
                        
                } else {
                        return lookupTimetableWwwSite(trainID, type);
                }
        }
        
        int getStationId(String name) {
                Integer id = (Integer) stationCache.get(name);
                
                if (id == null) {

                        id = stationDao.getIdByName(name);
                        stationCache.put(name, id);
                } 

                return id;
        }

        TimetableBean lookupTimetableAzureSite(String trainID, String type) throws Exception {          
                TimetableBean timetableBean = new TimetableBean();
                

                String url = "http://trafikinfo.bane.dk/TrafikInformation/Ruteplan/" + trainID;                 
                logger.fine("URL:" + url);
            
            JsoupInvocation wrapper = new JsoupInvocation( new URL(url) , replyTimeout);
            CircuitBreaker breaker = CircuitBreakerManager.getManager().getCircuitBreaker("banedk");
            
            Document doc = (Document) breaker.invoke(wrapper);
                    
            
            boolean currentStation = false;
            boolean currentStationSaved = false;
            
            Elements tables = doc.getElementsByClass("Rute");
            
            if (tables.size() == 1) {
                Element timetable = tables.get(0);
                Elements rows = timetable.getElementsByTag("tr");
                
                for (int i=0; i<rows.size(); i++) {
                        if (i==0) //First row is column headers
                                continue;
                        
                        
                        Element row = rows.get(i);
                        Elements fields = row.getElementsByTag("td");

                        
                        if (currentStationSaved == false && fields.get(0).attr("class").equalsIgnoreCase("Tidsstreg")) {
                                currentStation = true;
                                continue;
                        }
                        
                        TimetableEntry entry = new TimetableEntry();
                        
                        String station = fields.get(0).text() ;
                        if (station.equals("København"))
                                station = "København H"; //correct inconsistency in naming
                        
                        entry.setStation( station );
                        entry.setArrival( fields.get(1).text() );
                        entry.setDeparture( fields.get(2).text() );
                        
                        boolean cancelled = fields.get(3).text().equalsIgnoreCase("aflyst");
                        entry.setCancelled(cancelled);
                        
                        if (currentStation == true && currentStationSaved == false ) {
                                entry.setCurrent(currentStation);
                                currentStationSaved = true;
                        }
                        
                        entry.setStationId( getStationId( station ));
                        
                        timetableBean.entries.add(entry);
                }
                
                //TODO: There is an off-by-one error in this cancelled parser thingie
                final String cancelledString = "Aflyst";
                for (int i=0;i<timetableBean.entries.size(); i++) { //handle cancelled labels
                        final int lastIdx = (timetableBean.entries.size() - 1);
                        
                        TimetableEntry current = timetableBean.entries.get(i);
                        if (current.isCancelled()) {
                                if (i == 0) {
                                        current.setDeparture(cancelledString);
                                } else if (i == lastIdx) {
                                        current.setArrival(cancelledString);
                                } else if (i>0 && i<lastIdx) {
                                        TimetableEntry next = timetableBean.entries.get(i+1);
                                        TimetableEntry prev = timetableBean.entries.get(i-1);
                                        
                                        if (next.isCancelled())
                                                current.setDeparture(cancelledString);
                                        if (prev.isCancelled())
                                                current.setArrival(cancelledString);
                                }
                        }
                }
                
            } else {
                logger.warning("No time table found, trainID=" + trainID + " type=" + type);
            }
            
                
                return timetableBean;
        }

        TimetableBean lookupTimetableWwwSite(String trainID, String type) throws Exception {            
                TimetableBean timetableBean = new TimetableBean();
                
                String url = "http://www.bane.dk/visRute.asp?W=" + type + "&TogNr=" + trainID + "&artikelId=4276";
                logger.fine("URL:" + url);

            
            JsoupInvocation wrapper = new JsoupInvocation( new URL(url) , replyTimeout);
            CircuitBreaker breaker = CircuitBreakerManager.getManager().getCircuitBreaker("banedk");
            
            Document doc = (Document) breaker.invoke(wrapper);
                    
            
            boolean currentStation = false;
            boolean currentStationSaved = false;
            
            Elements tables = doc.getElementsByClass("Rute");
            
            if (tables.size() == 1) {
                Element timetable = tables.get(0);
                Elements rows = timetable.getElementsByTag("tr");
                
                for (int i=0; i<rows.size(); i++) {
                        if (i==0) //First row is column headers
                                continue;
                        
                        
                        Element row = rows.get(i);
                        Elements fields = row.getElementsByTag("td");

                        
                        if (currentStationSaved == false && fields.get(0).attr("class").equalsIgnoreCase("Tidsstreg")) {
                                currentStation = true;
                                continue;
                        }
                        
                        TimetableEntry entry = new TimetableEntry();
                        
                        String station = DepartureFetcher.cleanText( fields.get(0).text() ) ;
                        if (station.equals("København"))
                                station = "København H"; //correct inconsistency in naming
                        
                        String arrival = DepartureFetcher.cleanText( fields.get(1).text() );
                        String departure = DepartureFetcher.cleanText( fields.get(2).text() );
                        
                        entry.setStation( station );
                        entry.setArrival( arrival );
                        entry.setDeparture( departure );
                
                        
                        if (currentStation == true && currentStationSaved == false ) {
                                entry.setCurrent(currentStation);
                                currentStationSaved = true;
                        }
                        
                        entry.setStationId( getStationId( station ));
                        
                        timetableBean.entries.add(entry);
                }               
                
            } else {
                logger.warning("No time table found, trainID=" + trainID + " type=" + type);
            }
            
                
                return timetableBean;
        }       
        
}
1	package dk.thoerup.traininfoservice.banedk;
2
3
4
5	import java.net.URL;
6	import java.sql.SQLException;
7	import java.util.HashMap;
8	import java.util.Map;
9	import java.util.logging.Level;
10	import java.util.logging.Logger;
11
12	import net.sf.jsr107cache.Cache;
13	import net.sf.jsr107cache.CacheException;
14	import net.sf.jsr107cache.CacheManager;
15
16	import org.jsoup.nodes.Document;
17	import org.jsoup.nodes.Element;
18	import org.jsoup.select.Elements;
19
20	import com.google.appengine.api.memcache.jsr107cache.GCacheFactory;
21
22	import dk.thoerup.android.traininfo.common.TimetableBean;
23	import dk.thoerup.android.traininfo.common.TimetableEntry;
24	import dk.thoerup.circuitbreaker.CircuitBreaker;
25	import dk.thoerup.circuitbreaker.CircuitBreakerManager;
26	import dk.thoerup.traininfoservice.StationDAO;
27	import dk.thoerup.traininfoservice.Statistics;
28
29	public class TimetableFetcher {
30
31
32	Cache cache;
33	Cache stationCache;
34
35	StationDAO stationDao = new StationDAO();
36
37
38	Logger logger = Logger.getLogger(TimetableFetcher.class.getName());
39
40	private boolean useAzureSite;
41	private int replyTimeout;
42
43	@SuppressWarnings("unchecked")
44	public TimetableFetcher(boolean azureSite, int cacheTimeout, int replyTimeout) {
45	useAzureSite = azureSite;
46	this.replyTimeout = replyTimeout;
47
48	Map props = new HashMap();
49	props.put(GCacheFactory.EXPIRATION_DELTA_MILLIS, cacheTimeout);
50
51	try {
52	cache = CacheManager.getInstance().getCacheFactory().createCache(props);
53	} catch (CacheException e) {
54	logger.log(Level.WARNING, "error creating cache", e);
55	}
56
57	props = new HashMap();
58	props.put(GCacheFactory.EXPIRATION_DELTA_MILLIS, 36060*1000);
59
60	try {
61	stationCache = CacheManager.getInstance().getCacheFactory().createCache(props);
62	} catch (CacheException e) {
63	logger.log(Level.WARNING, "error creating cache", e);
64	}
65	}
66
67
68	TimetableBean cachedLookupTimetable(String trainID, String type) throws Exception {
69	String key = trainID+type;
70	TimetableBean list = (TimetableBean) cache.get(key);
71
72	if (list == null) {
73	list = lookupTimetable(trainID,type);
74	cache.put(key, list);
75	} else {
76	Statistics.getInstance().incrementTimetableCacheHits();
77	logger.info("Timetable: Cache hit " + trainID);
78	}
79	return list;
80	}
81
82	TimetableBean lookupTimetable(String trainID, String type) throws Exception {
83	if (useAzureSite == true ){
84	return lookupTimetableAzureSite(trainID, type);
85
86	} else {
87	return lookupTimetableWwwSite(trainID, type);
88	}
89	}
90
91	int getStationId(String name) {
92	Integer id = (Integer) stationCache.get(name);
93
94	if (id == null) {
95
96	id = stationDao.getIdByName(name);
97	stationCache.put(name, id);
98	}
99
100	return id;
101	}
102
103	TimetableBean lookupTimetableAzureSite(String trainID, String type) throws Exception {
104	TimetableBean timetableBean = new TimetableBean();
105
106
107	String url = "http://trafikinfo.bane.dk/TrafikInformation/Ruteplan/" + trainID;
108	logger.fine("URL:" + url);
109
110	JsoupInvocation wrapper = new JsoupInvocation( new URL(url) , replyTimeout);
111	CircuitBreaker breaker = CircuitBreakerManager.getManager().getCircuitBreaker("banedk");
112
113	Document doc = (Document) breaker.invoke(wrapper);
114
115
116	boolean currentStation = false;
117	boolean currentStationSaved = false;
118
119	Elements tables = doc.getElementsByClass("Rute");
120
121	if (tables.size() == 1) {
122	Element timetable = tables.get(0);
123	Elements rows = timetable.getElementsByTag("tr");
124
125	for (int i=0; i<rows.size(); i++) {
126	if (i==0) //First row is column headers
127	continue;
128
129
130	Element row = rows.get(i);
131	Elements fields = row.getElementsByTag("td");
132
133
134	if (currentStationSaved == false && fields.get(0).attr("class").equalsIgnoreCase("Tidsstreg")) {
135	currentStation = true;
136	continue;
137	}
138
139	TimetableEntry entry = new TimetableEntry();
140
141	String station = fields.get(0).text() ;
142	if (station.equals("København"))
143	station = "København H"; //correct inconsistency in naming
144
145	entry.setStation( station );
146	entry.setArrival( fields.get(1).text() );
147	entry.setDeparture( fields.get(2).text() );
148
149	boolean cancelled = fields.get(3).text().equalsIgnoreCase("aflyst");
150	entry.setCancelled(cancelled);
151
152	if (currentStation == true && currentStationSaved == false ) {
153	entry.setCurrent(currentStation);
154	currentStationSaved = true;
155	}
156
157	entry.setStationId( getStationId( station ));
158
159	timetableBean.entries.add(entry);
160	}
161
162	//TODO: There is an off-by-one error in this cancelled parser thingie
163	final String cancelledString = "Aflyst";
164	for (int i=0;i<timetableBean.entries.size(); i++) { //handle cancelled labels
165	final int lastIdx = (timetableBean.entries.size() - 1);
166
167	TimetableEntry current = timetableBean.entries.get(i);
168	if (current.isCancelled()) {
169	if (i == 0) {
170	current.setDeparture(cancelledString);
171	} else if (i == lastIdx) {
172	current.setArrival(cancelledString);
173	} else if (i>0 && i<lastIdx) {
174	TimetableEntry next = timetableBean.entries.get(i+1);
175	TimetableEntry prev = timetableBean.entries.get(i-1);
176
177	if (next.isCancelled())
178	current.setDeparture(cancelledString);
179	if (prev.isCancelled())
180	current.setArrival(cancelledString);
181	}
182	}
183	}
184
185	} else {
186	logger.warning("No time table found, trainID=" + trainID + " type=" + type);
187	}
188
189
190	return timetableBean;
191	}
192
193	TimetableBean lookupTimetableWwwSite(String trainID, String type) throws Exception {
194	TimetableBean timetableBean = new TimetableBean();
195
196	String url = "http://www.bane.dk/visRute.asp?W=" + type + "&TogNr=" + trainID + "&artikelId=4276";
197	logger.fine("URL:" + url);
198
199
200	JsoupInvocation wrapper = new JsoupInvocation( new URL(url) , replyTimeout);
201	CircuitBreaker breaker = CircuitBreakerManager.getManager().getCircuitBreaker("banedk");
202
203	Document doc = (Document) breaker.invoke(wrapper);
204
205
206	boolean currentStation = false;
207	boolean currentStationSaved = false;
208
209	Elements tables = doc.getElementsByClass("Rute");
210
211	if (tables.size() == 1) {
212	Element timetable = tables.get(0);
213	Elements rows = timetable.getElementsByTag("tr");
214
215	for (int i=0; i<rows.size(); i++) {
216	if (i==0) //First row is column headers
217	continue;
218
219
220	Element row = rows.get(i);
221	Elements fields = row.getElementsByTag("td");
222
223
224	if (currentStationSaved == false && fields.get(0).attr("class").equalsIgnoreCase("Tidsstreg")) {
225	currentStation = true;
226	continue;
227	}
228
229	TimetableEntry entry = new TimetableEntry();
230
231	String station = DepartureFetcher.cleanText( fields.get(0).text() ) ;
232	if (station.equals("København"))
233	station = "København H"; //correct inconsistency in naming
234
235	String arrival = DepartureFetcher.cleanText( fields.get(1).text() );
236	String departure = DepartureFetcher.cleanText( fields.get(2).text() );
237
238	entry.setStation( station );
239	entry.setArrival( arrival );
240	entry.setDeparture( departure );
241
242
243	if (currentStation == true && currentStationSaved == false ) {
244	entry.setCurrent(currentStation);
245	currentStationSaved = true;
246	}
247
248	entry.setStationId( getStationId( station ));
249
250	timetableBean.entries.add(entry);
251	}
252
253	} else {
254	logger.warning("No time table found, trainID=" + trainID + " type=" + type);
255	}
256
257
258	return timetableBean;
259	}
260
261	}