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;

public class DepartureFetcher {
        
        Logger logger = Logger.getLogger(DepartureFetcher.class.getName());
        
        Map<Integer, List<DepartureBean>> cache;
        
        StationDAO stationDao = new StationDAO();
        
        private boolean useTempSite;
        
        public DepartureFetcher(boolean tempSite, int cacheTimeout) {
                useTempSite = tempSite;
                cache = new TimeoutMap<Integer,List<DepartureBean>>(cacheTimeout);
        }
        
        
        public List<DepartureBean> cachedLookupDepartures(int stationID) throws Exception {

                List<DepartureBean> list = cache.get(stationID);
                
                if (list == null) {
                        list = lookupDepartures(stationID);
                        cache.put(stationID, list);
                } else {
                        logger.info("Departure: Cache hit " + stationID); //remove before production
                }
                return list;
        }
                

        public List<DepartureBean> lookupDepartures(int stationID) throws Exception {
                List<DepartureBean> departureList = new ArrayList<DepartureBean>();
                
                StationBean station = stationDao.getById(stationID);
                
                if (station.getRegional() != null) {
                        List<DepartureBean> list = lookupDepartures(station.getRegional(), "FJRN");
                        departureList.addAll(list);                     
                }
                
                if (station.getStrain() != null) {
                        List<DepartureBean> list = lookupDepartures(station.getStrain(), "S2");
                        departureList.addAll(list);     
                }               
                
                Collections.sort( departureList );

                
                return departureList;
        }
        
        public List<DepartureBean> lookupDepartures(String stationcode, String type) throws Exception {
                if (useTempSite == false) {
                        return lookupDeparturesNormalSite(stationcode, type);
                } else {
                        return lookupDeparturesFromTemporarySite(stationcode, type);
                }
        }
        
        public List<DepartureBean> lookupDeparturesNormalSite(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://www.bane.dk/visStation.asp?ArtikelID=4275&W=" + type + "&S=" + stationcode;
            BanedkInvocation wrapper = new BanedkInvocation(webClient, uri);
            CircuitBreaker breaker = CircuitBreakerManager.getManager().getCircuitBreaker("banedk");
            
            HtmlPage page = (HtmlPage) breaker.invoke(wrapper);
            
            HtmlElement table = page.getElementById("afgangtabel");
            
            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.equalsIgnoreCase("S2")) //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();
                                departure.setStatus(status);
                                
                                String note = extractNote( fields.get(7) );
                                departure.setNote(note);
                                
                                departure.setType(type);
                                
                                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;
            
            BanedkInvocation wrapper = new BanedkInvocation(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) {
                String number = "";
                HtmlElement anchorElement = trainTd.getElementsByTagName("a").get(0);
                String href = anchorElement.getAttribute("href");
                String argstring = href.substring( href.indexOf('?') + 1);
                
                String args[] = argstring.split("&");
                for (String arg : args) {
                        String pair[] = arg.split("="); // Key=pair[0], Value=pair[1]
                        
                        if (pair[0].equalsIgnoreCase("TogNr"))
                                number = pair[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
20	public class DepartureFetcher {
21
22	Logger logger = Logger.getLogger(DepartureFetcher.class.getName());
23
24	Map<Integer, List<DepartureBean>> cache;
25
26	StationDAO stationDao = new StationDAO();
27
28	private boolean useTempSite;
29
30	public DepartureFetcher(boolean tempSite, int cacheTimeout) {
31	useTempSite = tempSite;
32	cache = new TimeoutMap<Integer,List<DepartureBean>>(cacheTimeout);
33	}
34
35
36
37
38	public List<DepartureBean> cachedLookupDepartures(int stationID) throws Exception {
39
40	List<DepartureBean> list = cache.get(stationID);
41
42	if (list == null) {
43	list = lookupDepartures(stationID);
44	cache.put(stationID, list);
45	} else {
46	logger.info("Departure: Cache hit " + stationID); //remove before production
47	}
48	return list;
49	}
50
51
52	public List<DepartureBean> lookupDepartures(int stationID) throws Exception {
53	List<DepartureBean> departureList = new ArrayList<DepartureBean>();
54
55	StationBean station = stationDao.getById(stationID);
56
57	if (station.getRegional() != null) {
58	List<DepartureBean> list = lookupDepartures(station.getRegional(), "FJRN");
59	departureList.addAll(list);
60	}
61
62	if (station.getStrain() != null) {
63	List<DepartureBean> list = lookupDepartures(station.getStrain(), "S2");
64	departureList.addAll(list);
65	}
66
67	Collections.sort( departureList );
68
69
70	return departureList;
71	}
72
73	public List<DepartureBean> lookupDepartures(String stationcode, String type) throws Exception {
74	if (useTempSite == false) {
75	return lookupDeparturesNormalSite(stationcode, type);
76	} else {
77	return lookupDeparturesFromTemporarySite(stationcode, type);
78	}
79	}
80
81	public List<DepartureBean> lookupDeparturesNormalSite(String stationcode, String type) throws Exception {
82
83	List<DepartureBean> departureList = new ArrayList<DepartureBean>();
84
85	final WebClient webClient = new WebClient( BrowserVersion.FIREFOX_3 );
86	webClient.setTimeout(2500);
87	webClient.setJavaScriptEnabled(false);
88
89	String uri = "http://www.bane.dk/visStation.asp?ArtikelID=4275&W=" + type + "&S=" + stationcode;
90	BanedkInvocation wrapper = new BanedkInvocation(webClient, uri);
91	CircuitBreaker breaker = CircuitBreakerManager.getManager().getCircuitBreaker("banedk");
92
93	HtmlPage page = (HtmlPage) breaker.invoke(wrapper);
94
95	HtmlElement table = page.getElementById("afgangtabel");
96
97	if (table != null) {
98	DomNodeList<HtmlElement> tableRows = table.getElementsByTagName("tr");
99
100	for (HtmlElement currentRow : tableRows) {
101	String rowClass = currentRow.getAttribute("class");
102	if (rowClass != null && rowClass.toLowerCase().contains("station") ) {
103	DomNodeList<HtmlElement> fields = currentRow.getElementsByTagName("td");
104
105	DepartureBean departure = new DepartureBean();
106
107	String time = fields.get(0).asText();
108	if (time.equals(""))
109	time = "0:00"; //Bane.dk bug work-around
110	departure.setTime(time);
111
112	int updated = extractUpdated( fields.get(1) );
113	departure.setUpdated(updated);
114
115	String trainNumber = fields.get(2).asText();
116	if (type.equalsIgnoreCase("S2")) //If it is S-train we need to extract the trainNumber
117	trainNumber = trainNumber + " " + extractTrainNumber(fields.get(2));
118	departure.setTrainNumber(trainNumber);
119
120	String destination = fields.get(3).asText();
121	departure.setDestination(destination);
122
123	String origin = fields.get(4).asText();
124	departure.setOrigin(origin);
125
126	String location = fields.get(5).asText();
127	departure.setLocation(location);
128
129	String status = fields.get(6).asText();
130	departure.setStatus(status);
131
132	String note = extractNote( fields.get(7) );
133	departure.setNote(note);
134
135	departure.setType(type);
136
137	departureList.add(departure);
138	}
139	}
140	} else {
141	logger.warning("No departures found for station=" + stationcode + ", type=" + type);
142	}
143	webClient.closeAllWindows();
144
145	return departureList;
146	}
147
148	public List<DepartureBean> lookupDeparturesFromTemporarySite(String stationcode, String type) throws Exception {
149
150	List<DepartureBean> departureList = new ArrayList<DepartureBean>();
151
152	final WebClient webClient = new WebClient(BrowserVersion.FIREFOX_3);
153	webClient.setTimeout(2500);
154	webClient.setJavaScriptEnabled(false);
155
156
157	String uri = "http://bane.dk/lite/station.asp?w=" + type + "&s=" + stationcode;
158
159	BanedkInvocation wrapper = new BanedkInvocation(webClient, uri);
160	CircuitBreaker breaker = CircuitBreakerManager.getManager().getCircuitBreaker("banedk");
161
162	HtmlPage page = (HtmlPage) breaker.invoke(wrapper);
163
164	HtmlElement table = page.getElementById("traf_afgang");
165
166	if (table != null) {
167	DomNodeList<HtmlElement> tableRows = table.getElementsByTagName("tr");
168
169	boolean isFirst = true;
170
171	for (HtmlElement currentRow : tableRows) {
172	if (isFirst == true) { //skip table headers
173	isFirst = false;
174	continue;
175	}
176
177	DomNodeList<HtmlElement> fields = currentRow.getElementsByTagName("td");
178
179	DepartureBean departure = new DepartureBean();
180
181	String time = fields.get(0).asText().trim();
182
183	if (time.equals(""))
184	time = "0:00"; //Bane.dk bug work-around
185	departure.setTime(time);
186
187
188	String trainNumber = fields.get(1).asText();
189	departure.setTrainNumber(trainNumber);
190
191	String destination = fields.get(2).asText();
192	departure.setDestination(destination);
193
194	String origin = fields.get(3).asText();
195	departure.setOrigin(origin);
196
197	String status = fields.get(4).asText();
198	departure.setStatus(status);
199
200	String note = fields.get(5).asText();
201	departure.setNote(note);
202
203	departureList.add(departure);
204	}
205	} else {
206	logger.warning("No departures found for station=" + stationcode + ", type=" + type);
207	}
208	webClient.closeAllWindows();
209
210
211	return departureList;
212	}
213
214
215	private int extractUpdated(HtmlElement updatedTd) { //extract the digit (in this case: 4) from "media/trafikinfo/opdater4.gif"
216	int updated = -1;
217
218	DomNodeList<HtmlElement> updatedImgs = updatedTd.getElementsByTagName("img");
219	String updatedStr = updatedImgs.get(0).getAttribute("src");
220
221	if (updatedStr != null) {
222	for (int i=0; i<updatedStr.length(); i++) {
223	char c = updatedStr.charAt(i);
224	if ( Character.isDigit(c)) {
225	updated = Character.digit(c, 10);
226	break;
227	}
228	}
229	}
230	return updated;
231	}
232
233	private String extractNote(HtmlElement noteTd) {
234	String note = noteTd.asText().trim();
235
236	List<HtmlElement> elems = noteTd.getElementsByAttribute("span", "class", "bemtype");
237	if (elems.size() > 0 && note.charAt(note.length()-1) == 'i')
238	note = note.substring(0,note.length() -1 );
239
240	return note;
241	}
242
243	private String extractTrainNumber(HtmlElement trainTd) {
244	String number = "";
245	HtmlElement anchorElement = trainTd.getElementsByTagName("a").get(0);
246	String href = anchorElement.getAttribute("href");
247	String argstring = href.substring( href.indexOf('?') + 1);
248
249	String args[] = argstring.split("&");
250	for (String arg : args) {
251	String pair[] = arg.split("="); // Key=pair[0], Value=pair[1]
252
253	if (pair[0].equalsIgnoreCase("TogNr"))
254	number = pair[1];
255	}
256
257
258	return number;
259	}
260
261	//test
262	/*
263	public static void main(String args[]) throws Exception {
264	DepartureFetcher f = new DepartureFetcher();
265	List<DepartureBean> deps = f.lookupDepartures("AR", "FJRN");
266	for(DepartureBean d : deps) {
267	System.out.println( d.getTime() + ";" + d.getUpdated() + ";" + d.getTrainNumber() + ";" +
268	d.getDestination() + ";" + d.getOrigin() + ";" + d.getLocation() + ";" + d.getStatus() + ";" + d.getNote() );
269	}
270
271	System.out.println("--------------------------");
272	}*/
273	}