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.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();
            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);
                                
                                departureList.add(departure);
                        }
                    }
            } else {
                logger.warning("No departures found for station=" + stationcode + ", type=" + type);
            }
            
            return departureList;
        }
        
        public List<DepartureBean> lookupDeparturesFromTemporarySite(String stationcode, String type) throws Exception {
                
                List<DepartureBean> departureList = new ArrayList<DepartureBean>();
                
            final WebClient webClient = new WebClient();
            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);
            }
            
            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.WebClient;
10	import com.gargoylesoftware.htmlunit.html.DomNodeList;
11	import com.gargoylesoftware.htmlunit.html.HtmlElement;
12	import com.gargoylesoftware.htmlunit.html.HtmlPage;
13
14	import dk.thoerup.circuitbreaker.CircuitBreaker;
15	import dk.thoerup.circuitbreaker.CircuitBreakerManager;
16	import dk.thoerup.traininfoservice.StationBean;
17	import dk.thoerup.traininfoservice.StationDAO;
18
19	public class DepartureFetcher {
20
21	Logger logger = Logger.getLogger(DepartureFetcher.class.getName());
22
23	Map<Integer, List<DepartureBean>> cache;
24
25	StationDAO stationDao = new StationDAO();
26
27	private boolean useTempSite;
28
29	public DepartureFetcher(boolean tempSite, int cacheTimeout) {
30	useTempSite = tempSite;
31	cache = new TimeoutMap<Integer,List<DepartureBean>>(cacheTimeout);
32	}
33
34
35
36
37	public List<DepartureBean> cachedLookupDepartures(int stationID) throws Exception {
38
39	List<DepartureBean> list = cache.get(stationID);
40
41	if (list == null) {
42	list = lookupDepartures(stationID);
43	cache.put(stationID, list);
44	} else {
45	logger.info("Departure: Cache hit " + stationID); //remove before production
46	}
47	return list;
48	}
49
50
51	public List<DepartureBean> lookupDepartures(int stationID) throws Exception {
52	List<DepartureBean> departureList = new ArrayList<DepartureBean>();
53
54	StationBean station = stationDao.getById(stationID);
55
56	if (station.getRegional() != null) {
57	List<DepartureBean> list = lookupDepartures(station.getRegional(), "FJRN");
58	departureList.addAll(list);
59	}
60
61	if (station.getStrain() != null) {
62	List<DepartureBean> list = lookupDepartures(station.getStrain(), "S2");
63	departureList.addAll(list);
64	}
65
66	Collections.sort( departureList );
67
68
69	return departureList;
70	}
71
72	public List<DepartureBean> lookupDepartures(String stationcode, String type) throws Exception {
73	if (useTempSite == false) {
74	return lookupDeparturesNormalSite(stationcode, type);
75	} else {
76	return lookupDeparturesFromTemporarySite(stationcode, type);
77	}
78	}
79
80	public List<DepartureBean> lookupDeparturesNormalSite(String stationcode, String type) throws Exception {
81
82	List<DepartureBean> departureList = new ArrayList<DepartureBean>();
83
84	final WebClient webClient = new WebClient();
85	webClient.setTimeout(2500);
86	webClient.setJavaScriptEnabled(false);
87
88	String uri = "http://www.bane.dk/visStation.asp?ArtikelID=4275&W=" + type + "&S=" + stationcode;
89	BanedkInvocation wrapper = new BanedkInvocation(webClient, uri);
90	CircuitBreaker breaker = CircuitBreakerManager.getManager().getCircuitBreaker("banedk");
91
92	HtmlPage page = (HtmlPage) breaker.invoke(wrapper);
93
94	HtmlElement table = page.getElementById("afgangtabel");
95
96	if (table != null) {
97	DomNodeList<HtmlElement> tableRows = table.getElementsByTagName("tr");
98
99	for (HtmlElement currentRow : tableRows) {
100	String rowClass = currentRow.getAttribute("class");
101	if (rowClass != null && rowClass.toLowerCase().contains("station") ) {
102	DomNodeList<HtmlElement> fields = currentRow.getElementsByTagName("td");
103
104	DepartureBean departure = new DepartureBean();
105
106	String time = fields.get(0).asText();
107	if (time.equals(""))
108	time = "0:00"; //Bane.dk bug work-around
109	departure.setTime(time);
110
111	int updated = extractUpdated( fields.get(1) );
112	departure.setUpdated(updated);
113
114	String trainNumber = fields.get(2).asText();
115	if (type.equalsIgnoreCase("S2")) //If it is S-train we need to extract the trainNumber
116	trainNumber = trainNumber + " " + extractTrainNumber(fields.get(2));
117	departure.setTrainNumber(trainNumber);
118
119	String destination = fields.get(3).asText();
120	departure.setDestination(destination);
121
122	String origin = fields.get(4).asText();
123	departure.setOrigin(origin);
124
125	String location = fields.get(5).asText();
126	departure.setLocation(location);
127
128	String status = fields.get(6).asText();
129	departure.setStatus(status);
130
131	String note = extractNote( fields.get(7) );
132	departure.setNote(note);
133
134	departureList.add(departure);
135	}
136	}
137	} else {
138	logger.warning("No departures found for station=" + stationcode + ", type=" + type);
139	}
140
141	return departureList;
142	}
143
144	public List<DepartureBean> lookupDeparturesFromTemporarySite(String stationcode, String type) throws Exception {
145
146	List<DepartureBean> departureList = new ArrayList<DepartureBean>();
147
148	final WebClient webClient = new WebClient();
149	webClient.setTimeout(2500);
150	webClient.setJavaScriptEnabled(false);
151
152
153	String uri = "http://bane.dk/lite/station.asp?w=" + type + "&s=" + stationcode;
154
155	BanedkInvocation wrapper = new BanedkInvocation(webClient, uri);
156	CircuitBreaker breaker = CircuitBreakerManager.getManager().getCircuitBreaker("banedk");
157
158	HtmlPage page = (HtmlPage) breaker.invoke(wrapper);
159
160	HtmlElement table = page.getElementById("traf_afgang");
161
162	if (table != null) {
163	DomNodeList<HtmlElement> tableRows = table.getElementsByTagName("tr");
164
165	boolean isFirst = true;
166
167	for (HtmlElement currentRow : tableRows) {
168	if (isFirst == true) { //skip table headers
169	isFirst = false;
170	continue;
171	}
172
173	DomNodeList<HtmlElement> fields = currentRow.getElementsByTagName("td");
174
175	DepartureBean departure = new DepartureBean();
176
177	String time = fields.get(0).asText().trim();
178
179	if (time.equals(""))
180	time = "0:00"; //Bane.dk bug work-around
181	departure.setTime(time);
182
183
184	String trainNumber = fields.get(1).asText();
185	departure.setTrainNumber(trainNumber);
186
187	String destination = fields.get(2).asText();
188	departure.setDestination(destination);
189
190	String origin = fields.get(3).asText();
191	departure.setOrigin(origin);
192
193	String status = fields.get(4).asText();
194	departure.setStatus(status);
195
196	String note = fields.get(5).asText();
197	departure.setNote(note);
198
199	departureList.add(departure);
200	}
201	} else {
202	logger.warning("No departures found for station=" + stationcode + ", type=" + type);
203	}
204
205	return departureList;
206	}
207
208
209	private int extractUpdated(HtmlElement updatedTd) { //extract the digit (in this case: 4) from "media/trafikinfo/opdater4.gif"
210	int updated = -1;
211
212	DomNodeList<HtmlElement> updatedImgs = updatedTd.getElementsByTagName("img");
213	String updatedStr = updatedImgs.get(0).getAttribute("src");
214
215	if (updatedStr != null) {
216	for (int i=0; i<updatedStr.length(); i++) {
217	char c = updatedStr.charAt(i);
218	if ( Character.isDigit(c)) {
219	updated = Character.digit(c, 10);
220	break;
221	}
222	}
223	}
224	return updated;
225	}
226
227	private String extractNote(HtmlElement noteTd) {
228	String note = noteTd.asText().trim();
229
230	List<HtmlElement> elems = noteTd.getElementsByAttribute("span", "class", "bemtype");
231	if (elems.size() > 0 && note.charAt(note.length()-1) == 'i')
232	note = note.substring(0,note.length() -1 );
233
234	return note;
235	}
236
237	private String extractTrainNumber(HtmlElement trainTd) {
238	String number = "";
239	HtmlElement anchorElement = trainTd.getElementsByTagName("a").get(0);
240	String href = anchorElement.getAttribute("href");
241	String argstring = href.substring( href.indexOf('?') + 1);
242
243	String args[] = argstring.split("&");
244	for (String arg : args) {
245	String pair[] = arg.split("="); // Key=pair[0], Value=pair[1]
246
247	if (pair[0].equalsIgnoreCase("TogNr"))
248	number = pair[1];
249	}
250
251
252
253	return number;
254	}
255
256	//test
257	/*
258	public static void main(String args[]) throws Exception {
259	DepartureFetcher f = new DepartureFetcher();
260	List<DepartureBean> deps = f.lookupDepartures("AR", "FJRN");
261	for(DepartureBean d : deps) {
262	System.out.println( d.getTime() + ";" + d.getUpdated() + ";" + d.getTrainNumber() + ";" +
263	d.getDestination() + ";" + d.getOrigin() + ";" + d.getLocation() + ";" + d.getStatus() + ";" + d.getNote() );
264	}
265
266	System.out.println("--------------------------");
267	}*/
268	}