traininfoservice/banedk/DepartureFetcher.java

package dk.thoerup.traininfoservice.banedk;

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.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<String, List<DepartureBean>> cache;
        
        StationDAO stationDao = new StationDAO();
        
        private boolean useTempSite;
        
        public DepartureFetcher(boolean tempSite, int cacheTimeout) {
                useTempSite = tempSite;
                cache = new TimeoutMap<String,List<DepartureBean>>(cacheTimeout);
        }
        
        
        public List<DepartureBean> cachedLookupDepartures(int stationID, boolean arrival) throws Exception {
                final String key = "" + stationID + ":" + arrival;
                
                List<DepartureBean> list = cache.get(key);

                
                if (list == null) {
                        list = lookupDepartures(stationID,arrival);
                        cache.put(key, list);
                } else {
                        Statistics.getInstance().incrementDepartureCacheHits();
                        logger.info("Departure: Cache hit " + key); //remove before production
                }
                return list;
        }
                

        public List<DepartureBean> lookupDepartures(int stationID, boolean arrival) throws Exception {
                List<DepartureBean> departureList = new ArrayList<DepartureBean>();
                
                StationBean station = stationDao.getById(stationID);
                
                if (station.getRegional() != null) {
                        List<DepartureBean> list = lookupDepartures(station.getRegional(), TrainType.REGIONAL, arrival);
                        departureList.addAll(list);                     
                }
                
                if (station.getStrain() != null) {
                        List<DepartureBean> list = lookupDepartures(station.getStrain(), TrainType.STOG, arrival);
                        departureList.addAll(list);     
                }               
                
                Collections.sort( departureList );

                
                return departureList;
        }
        
        public List<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;
                }
        }
        
        private String getTypeString(TrainType type) {
                switch (type) {
                case STOG:
                        return "S-Tog";
                case REGIONAL:
                        return "Fjerntog";
                default:
                        return ""; //Can not happen
                }
        }
        
        public List<DepartureBean> lookupDeparturesNormalSite(String stationcode, TrainType type, boolean arrival) throws Exception {
                
                List<DepartureBean> departureList = new ArrayList<DepartureBean>();
                
            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<HtmlElement> tableRows =  table.getElementsByTagName("tr");
                    
                    for (HtmlElement currentRow : tableRows) {
                        String rowClass = currentRow.getAttribute("class");
                        if (rowClass != null && rowClass.toLowerCase().contains("station") ) {
                                DomNodeList<HtmlElement> fields = currentRow.getElementsByTagName("td");
        
                                DepartureBean departure = new DepartureBean();
                                
                                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);
                                
                                departureList.add(departure);
                        }
                    }
            } else {
                logger.warning("No departures found for station=" + stationcode + ", type=" + type);
            }
            webClient.closeAllWindows();
            
            return departureList;
        }
        
        public List<DepartureBean> lookupDeparturesFromTemporarySite(String stationcode, String type) throws Exception {
                
                List<DepartureBean> departureList = new ArrayList<DepartureBean>();
                
            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<HtmlElement> tableRows =  table.getElementsByTagName("tr");
                    
                    boolean isFirst = true;
                    
                    for (HtmlElement currentRow : tableRows) {
                        if (isFirst == true) { //skip table headers
                                isFirst = false;
                                continue;
                        }
                        
                        DomNodeList<HtmlElement> 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;
                
                DomNodeList<HtmlElement> updatedImgs = updatedTd.getElementsByTagName("img");
                String updatedStr = updatedImgs.get(0).getAttribute("src");
                
                if (updatedStr != null) {
                        for (int i=0; i<updatedStr.length(); i++) {
                                char c = updatedStr.charAt(i);
                                if ( Character.isDigit(c))  {
                                        updated = Character.digit(c, 10);
                                        break;
                                }
                        }
                }               
                return updated;
        }
        
        private String extractNote(HtmlElement noteTd) {
                String note = noteTd.asText().trim();
                
                List<HtmlElement> 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 {
                DepartureFetcher f = new DepartureFetcher();
                List<DepartureBean> deps = f.lookupDepartures("AR", "FJRN");
                for(DepartureBean d : deps) {
                        System.out.println( d.getTime() + ";" + d.getUpdated() + ";" + d.getTrainNumber() + ";" + 
                                                d.getDestination() + ";" + d.getOrigin() + ";" + d.getLocation() + ";" + d.getStatus() + ";" + d.getNote()   );
                }
                
                System.out.println("--------------------------");
        }*/
}
1	package dk.thoerup.traininfoservice.banedk;
2
3	import java.util.ArrayList;
4	import java.util.Collections;
5	import java.util.List;
6	import java.util.Map;
7	import java.util.logging.Logger;
8
9	import com.gargoylesoftware.htmlunit.BrowserVersion;
10	import com.gargoylesoftware.htmlunit.WebClient;
11	import com.gargoylesoftware.htmlunit.html.DomNodeList;
12	import com.gargoylesoftware.htmlunit.html.HtmlElement;
13	import com.gargoylesoftware.htmlunit.html.HtmlPage;
14
15	import dk.thoerup.circuitbreaker.CircuitBreaker;
16	import dk.thoerup.circuitbreaker.CircuitBreakerManager;
17	import dk.thoerup.traininfoservice.StationBean;
18	import dk.thoerup.traininfoservice.StationDAO;
19	import dk.thoerup.traininfoservice.Statistics;
20
21	public class DepartureFetcher {
22
23	enum TrainType{
24	STOG,
25	REGIONAL
26	}
27
28	Logger logger = Logger.getLogger(DepartureFetcher.class.getName());
29
30	Map<String, List<DepartureBean>> cache;
31
32	StationDAO stationDao = new StationDAO();
33
34	private boolean useTempSite;
35
36	public DepartureFetcher(boolean tempSite, int cacheTimeout) {
37	useTempSite = tempSite;
38	cache = new TimeoutMap<String,List<DepartureBean>>(cacheTimeout);
39	}
40
41
42
43
44	public List<DepartureBean> cachedLookupDepartures(int stationID, boolean arrival) throws Exception {
45	final String key = "" + stationID + ":" + arrival;
46
47	List<DepartureBean> list = cache.get(key);
48
49
50	if (list == null) {
51	list = lookupDepartures(stationID,arrival);
52	cache.put(key, list);
53	} else {
54	Statistics.getInstance().incrementDepartureCacheHits();
55	logger.info("Departure: Cache hit " + key); //remove before production
56	}
57	return list;
58	}
59
60
61	public List<DepartureBean> lookupDepartures(int stationID, boolean arrival) throws Exception {
62	List<DepartureBean> departureList = new ArrayList<DepartureBean>();
63
64	StationBean station = stationDao.getById(stationID);
65
66	if (station.getRegional() != null) {
67	List<DepartureBean> list = lookupDepartures(station.getRegional(), TrainType.REGIONAL, arrival);
68	departureList.addAll(list);
69	}
70
71	if (station.getStrain() != null) {
72	List<DepartureBean> list = lookupDepartures(station.getStrain(), TrainType.STOG, arrival);
73	departureList.addAll(list);
74	}
75
76	Collections.sort( departureList );
77
78
79	return departureList;
80	}
81
82	public List<DepartureBean> lookupDepartures(String stationcode, TrainType type, boolean arrival) throws Exception {
83	if (useTempSite == false) {
84	return lookupDeparturesNormalSite(stationcode, type, arrival);
85	} else {
86	//return lookupDeparturesFromTemporarySite(stationcode, type);
87	//TODO: find out what to to if they ever put a temp site up on trafikinfo.bane.dk
88	return null;
89	}
90	}
91
92	private String getTypeString(TrainType type) {
93	switch (type) {
94	case STOG:
95	return "S-Tog";
96	case REGIONAL:
97	return "Fjerntog";
98	default:
99	return ""; //Can not happen
100	}
101	}
102
103	public List<DepartureBean> lookupDeparturesNormalSite(String stationcode, TrainType type, boolean arrival) throws Exception {
104
105	List<DepartureBean> departureList = new ArrayList<DepartureBean>();
106
107	final WebClient webClient = new WebClient( BrowserVersion.FIREFOX_3 );
108	webClient.setTimeout(2500);
109	webClient.setJavaScriptEnabled(false);
110
111
112	String typeString = getTypeString(type);
113	String arrivalDeparture = (arrival==false) ? "Afgang" : "Ankomst";
114
115	//String uri = "http://www.bane.dk/visStation.asp?ArtikelID=4275&W=" + type + "&S=" + stationcode;
116	String uri = "http://trafikinfo.bane.dk/Trafikinformation/AfgangAnkomst/" + arrivalDeparture + "/" + stationcode + "/" + typeString + "/UdvidetVisning";
117
118	//logger.info("URI: " + uri);
119	HtmlunitInvocation wrapper = new HtmlunitInvocation(webClient, uri);
120	CircuitBreaker breaker = CircuitBreakerManager.getManager().getCircuitBreaker("banedk");
121
122	HtmlPage page = (HtmlPage) breaker.invoke(wrapper);
123
124	String tableName = arrival == false ? "afgangtabel" : "ankomsttabel";
125	HtmlElement table = page.getElementById(tableName);
126
127	if (table != null) {
128	DomNodeList<HtmlElement> tableRows = table.getElementsByTagName("tr");
129
130	for (HtmlElement currentRow : tableRows) {
131	String rowClass = currentRow.getAttribute("class");
132	if (rowClass != null && rowClass.toLowerCase().contains("station") ) {
133	DomNodeList<HtmlElement> fields = currentRow.getElementsByTagName("td");
134
135	DepartureBean departure = new DepartureBean();
136
137	String time = fields.get(0).asText();
138	if (time.equals(""))
139	time = "0:00"; //Bane.dk bug work-around
140	departure.setTime(time);
141
142	int updated = extractUpdated( fields.get(1) );
143	departure.setUpdated(updated);
144
145	String trainNumber = fields.get(2).asText();
146	if (type == TrainType.STOG) //If it is S-train we need to extract the trainNumber
147	trainNumber = trainNumber + " " + extractTrainNumber(fields.get(2));
148	departure.setTrainNumber(trainNumber);
149
150	String destination = fields.get(3).asText();
151	departure.setDestination(destination);
152
153	String origin = fields.get(4).asText();
154	departure.setOrigin(origin);
155
156	String location = fields.get(5).asText();
157	departure.setLocation(location);
158
159	String status = fields.get(6).asText().trim();
160	departure.setStatus(status);
161
162	String note = extractNote( fields.get(7) );
163	departure.setNote(note);
164
165	departure.setType(typeString);
166
167	departureList.add(departure);
168	}
169	}
170	} else {
171	logger.warning("No departures found for station=" + stationcode + ", type=" + type);
172	}
173	webClient.closeAllWindows();
174
175	return departureList;
176	}
177
178	public List<DepartureBean> lookupDeparturesFromTemporarySite(String stationcode, String type) throws Exception {
179
180	List<DepartureBean> departureList = new ArrayList<DepartureBean>();
181
182	final WebClient webClient = new WebClient(BrowserVersion.FIREFOX_3);
183	webClient.setTimeout(2500);
184	webClient.setJavaScriptEnabled(false);
185
186
187	String uri = "http://bane.dk/lite/station.asp?w=" + type + "&s=" + stationcode;
188
189	HtmlunitInvocation wrapper = new HtmlunitInvocation(webClient, uri);
190	CircuitBreaker breaker = CircuitBreakerManager.getManager().getCircuitBreaker("banedk");
191
192	HtmlPage page = (HtmlPage) breaker.invoke(wrapper);
193
194	HtmlElement table = page.getElementById("traf_afgang");
195
196	if (table != null) {
197	DomNodeList<HtmlElement> tableRows = table.getElementsByTagName("tr");
198
199	boolean isFirst = true;
200
201	for (HtmlElement currentRow : tableRows) {
202	if (isFirst == true) { //skip table headers
203	isFirst = false;
204	continue;
205	}
206
207	DomNodeList<HtmlElement> fields = currentRow.getElementsByTagName("td");
208
209	DepartureBean departure = new DepartureBean();
210
211	String time = fields.get(0).asText().trim();
212
213	if (time.equals(""))
214	time = "0:00"; //Bane.dk bug work-around
215	departure.setTime(time);
216
217
218	String trainNumber = fields.get(1).asText();
219	departure.setTrainNumber(trainNumber);
220
221	String destination = fields.get(2).asText();
222	departure.setDestination(destination);
223
224	String origin = fields.get(3).asText();
225	departure.setOrigin(origin);
226
227	String status = fields.get(4).asText();
228	departure.setStatus(status);
229
230	String note = fields.get(5).asText();
231	departure.setNote(note);
232
233	departureList.add(departure);
234	}
235	} else {
236	logger.warning("No departures found for station=" + stationcode + ", type=" + type);
237	}
238	webClient.closeAllWindows();
239
240
241	return departureList;
242	}
243
244
245	private int extractUpdated(HtmlElement updatedTd) { //extract the digit (in this case: 4) from "media/trafikinfo/opdater4.gif"
246	int updated = -1;
247
248	DomNodeList<HtmlElement> updatedImgs = updatedTd.getElementsByTagName("img");
249	String updatedStr = updatedImgs.get(0).getAttribute("src");
250
251	if (updatedStr != null) {
252	for (int i=0; i<updatedStr.length(); i++) {
253	char c = updatedStr.charAt(i);
254	if ( Character.isDigit(c)) {
255	updated = Character.digit(c, 10);
256	break;
257	}
258	}
259	}
260	return updated;
261	}
262
263	private String extractNote(HtmlElement noteTd) {
264	String note = noteTd.asText().trim();
265
266	List<HtmlElement> elems = noteTd.getElementsByAttribute("span", "class", "bemtype");
267	if (elems.size() > 0 && note.charAt(note.length()-1) == 'i')
268	note = note.substring(0,note.length() -1 );
269
270	return note;
271	}
272
273	private String extractTrainNumber(HtmlElement trainTd) {
274	HtmlElement anchorElement = trainTd.getElementsByTagName("a").get(0);
275	String href = anchorElement.getAttribute("href");
276
277	int pos = href.lastIndexOf('/');
278	String number = href.substring(pos+1);
279
280	return number;
281	}
282
283	//test
284	/*
285	public static void main(String args[]) throws Exception {
286	DepartureFetcher f = new DepartureFetcher();
287	List<DepartureBean> deps = f.lookupDepartures("AR", "FJRN");
288	for(DepartureBean d : deps) {
289	System.out.println( d.getTime() + ";" + d.getUpdated() + ";" + d.getTrainNumber() + ";" +
290	d.getDestination() + ";" + d.getOrigin() + ";" + d.getLocation() + ";" + d.getStatus() + ";" + d.getNote() );
291	}
292
293	System.out.println("--------------------------");
294	}*/
295	}