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 {
        
        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(), "FJRN", arrival);
                        departureList.addAll(list);                     
                }
                
                if (station.getStrain() != null) {
                        List<DepartureBean> list = lookupDepartures(station.getStrain(), "S2", arrival);
                        departureList.addAll(list);     
                }               
                
                Collections.sort( departureList );

                
                return departureList;
        }
        
        public List<DepartureBean> lookupDepartures(String stationcode, String type, boolean arrival) throws Exception {
                if (useTempSite == false) {
                        return lookupDeparturesNormalSite(stationcode, type, arrival);
                } else {
                        return lookupDeparturesFromTemporarySite(stationcode, type);
                }
        }
        
        public List<DepartureBean> lookupDeparturesNormalSite(String stationcode, String 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 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);
            
            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.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	import dk.thoerup.traininfoservice.Statistics;
20
21	public class DepartureFetcher {
22
23	Logger logger = Logger.getLogger(DepartureFetcher.class.getName());
24
25	Map<String, List<DepartureBean>> cache;
26
27	StationDAO stationDao = new StationDAO();
28
29	private boolean useTempSite;
30
31	public DepartureFetcher(boolean tempSite, int cacheTimeout) {
32	useTempSite = tempSite;
33	cache = new TimeoutMap<String,List<DepartureBean>>(cacheTimeout);
34	}
35
36
37
38
39	public List<DepartureBean> cachedLookupDepartures(int stationID, boolean arrival) throws Exception {
40	final String key = "" + stationID + ":" + arrival;
41
42	List<DepartureBean> list = cache.get(key);
43
44
45	if (list == null) {
46	list = lookupDepartures(stationID,arrival);
47	cache.put(key, list);
48	} else {
49	Statistics.getInstance().incrementDepartureCacheHits();
50	logger.info("Departure: Cache hit " + key); //remove before production
51	}
52	return list;
53	}
54
55
56	public List<DepartureBean> lookupDepartures(int stationID, boolean arrival) throws Exception {
57	List<DepartureBean> departureList = new ArrayList<DepartureBean>();
58
59	StationBean station = stationDao.getById(stationID);
60
61	if (station.getRegional() != null) {
62	List<DepartureBean> list = lookupDepartures(station.getRegional(), "FJRN", arrival);
63	departureList.addAll(list);
64	}
65
66	if (station.getStrain() != null) {
67	List<DepartureBean> list = lookupDepartures(station.getStrain(), "S2", arrival);
68	departureList.addAll(list);
69	}
70
71	Collections.sort( departureList );
72
73
74	return departureList;
75	}
76
77	public List<DepartureBean> lookupDepartures(String stationcode, String type, boolean arrival) throws Exception {
78	if (useTempSite == false) {
79	return lookupDeparturesNormalSite(stationcode, type, arrival);
80	} else {
81	return lookupDeparturesFromTemporarySite(stationcode, type);
82	}
83	}
84
85	public List<DepartureBean> lookupDeparturesNormalSite(String stationcode, String type, boolean arrival) throws Exception {
86
87	List<DepartureBean> departureList = new ArrayList<DepartureBean>();
88
89	final WebClient webClient = new WebClient( BrowserVersion.FIREFOX_3 );
90	webClient.setTimeout(2500);
91	webClient.setJavaScriptEnabled(false);
92
93	String uri = "http://www.bane.dk/visStation.asp?ArtikelID=4275&W=" + type + "&S=" + stationcode;
94	BanedkInvocation wrapper = new BanedkInvocation(webClient, uri);
95	CircuitBreaker breaker = CircuitBreakerManager.getManager().getCircuitBreaker("banedk");
96
97	HtmlPage page = (HtmlPage) breaker.invoke(wrapper);
98
99	String tableName = arrival == false ? "afgangtabel" : "ankomsttabel";
100	HtmlElement table = page.getElementById(tableName);
101
102	if (table != null) {
103	DomNodeList<HtmlElement> tableRows = table.getElementsByTagName("tr");
104
105	for (HtmlElement currentRow : tableRows) {
106	String rowClass = currentRow.getAttribute("class");
107	if (rowClass != null && rowClass.toLowerCase().contains("station") ) {
108	DomNodeList<HtmlElement> fields = currentRow.getElementsByTagName("td");
109
110	DepartureBean departure = new DepartureBean();
111
112	String time = fields.get(0).asText();
113	if (time.equals(""))
114	time = "0:00"; //Bane.dk bug work-around
115	departure.setTime(time);
116
117	int updated = extractUpdated( fields.get(1) );
118	departure.setUpdated(updated);
119
120	String trainNumber = fields.get(2).asText();
121	if (type.equalsIgnoreCase("S2")) //If it is S-train we need to extract the trainNumber
122	trainNumber = trainNumber + " " + extractTrainNumber(fields.get(2));
123	departure.setTrainNumber(trainNumber);
124
125	String destination = fields.get(3).asText();
126	departure.setDestination(destination);
127
128	String origin = fields.get(4).asText();
129	departure.setOrigin(origin);
130
131	String location = fields.get(5).asText();
132	departure.setLocation(location);
133
134	String status = fields.get(6).asText();
135	departure.setStatus(status);
136
137	String note = extractNote( fields.get(7) );
138	departure.setNote(note);
139
140	departure.setType(type);
141
142	departureList.add(departure);
143	}
144	}
145	} else {
146	logger.warning("No departures found for station=" + stationcode + ", type=" + type);
147	}
148	webClient.closeAllWindows();
149
150	return departureList;
151	}
152
153	public List<DepartureBean> lookupDeparturesFromTemporarySite(String stationcode, String type) throws Exception {
154
155	List<DepartureBean> departureList = new ArrayList<DepartureBean>();
156
157	final WebClient webClient = new WebClient(BrowserVersion.FIREFOX_3);
158	webClient.setTimeout(2500);
159	webClient.setJavaScriptEnabled(false);
160
161
162	String uri = "http://bane.dk/lite/station.asp?w=" + type + "&s=" + stationcode;
163
164	BanedkInvocation wrapper = new BanedkInvocation(webClient, uri);
165	CircuitBreaker breaker = CircuitBreakerManager.getManager().getCircuitBreaker("banedk");
166
167	HtmlPage page = (HtmlPage) breaker.invoke(wrapper);
168
169	HtmlElement table = page.getElementById("traf_afgang");
170
171	if (table != null) {
172	DomNodeList<HtmlElement> tableRows = table.getElementsByTagName("tr");
173
174	boolean isFirst = true;
175
176	for (HtmlElement currentRow : tableRows) {
177	if (isFirst == true) { //skip table headers
178	isFirst = false;
179	continue;
180	}
181
182	DomNodeList<HtmlElement> fields = currentRow.getElementsByTagName("td");
183
184	DepartureBean departure = new DepartureBean();
185
186	String time = fields.get(0).asText().trim();
187
188	if (time.equals(""))
189	time = "0:00"; //Bane.dk bug work-around
190	departure.setTime(time);
191
192
193	String trainNumber = fields.get(1).asText();
194	departure.setTrainNumber(trainNumber);
195
196	String destination = fields.get(2).asText();
197	departure.setDestination(destination);
198
199	String origin = fields.get(3).asText();
200	departure.setOrigin(origin);
201
202	String status = fields.get(4).asText();
203	departure.setStatus(status);
204
205	String note = fields.get(5).asText();
206	departure.setNote(note);
207
208	departureList.add(departure);
209	}
210	} else {
211	logger.warning("No departures found for station=" + stationcode + ", type=" + type);
212	}
213	webClient.closeAllWindows();
214
215
216	return departureList;
217	}
218
219
220	private int extractUpdated(HtmlElement updatedTd) { //extract the digit (in this case: 4) from "media/trafikinfo/opdater4.gif"
221	int updated = -1;
222
223	DomNodeList<HtmlElement> updatedImgs = updatedTd.getElementsByTagName("img");
224	String updatedStr = updatedImgs.get(0).getAttribute("src");
225
226	if (updatedStr != null) {
227	for (int i=0; i<updatedStr.length(); i++) {
228	char c = updatedStr.charAt(i);
229	if ( Character.isDigit(c)) {
230	updated = Character.digit(c, 10);
231	break;
232	}
233	}
234	}
235	return updated;
236	}
237
238	private String extractNote(HtmlElement noteTd) {
239	String note = noteTd.asText().trim();
240
241	List<HtmlElement> elems = noteTd.getElementsByAttribute("span", "class", "bemtype");
242	if (elems.size() > 0 && note.charAt(note.length()-1) == 'i')
243	note = note.substring(0,note.length() -1 );
244
245	return note;
246	}
247
248	private String extractTrainNumber(HtmlElement trainTd) {
249	String number = "";
250	HtmlElement anchorElement = trainTd.getElementsByTagName("a").get(0);
251	String href = anchorElement.getAttribute("href");
252	String argstring = href.substring( href.indexOf('?') + 1);
253
254	String args[] = argstring.split("&");
255	for (String arg : args) {
256	String pair[] = arg.split("="); // Key=pair[0], Value=pair[1]
257
258	if (pair[0].equalsIgnoreCase("TogNr"))
259	number = pair[1];
260	}
261
262
263	return number;
264	}
265
266	//test
267	/*
268	public static void main(String args[]) throws Exception {
269	DepartureFetcher f = new DepartureFetcher();
270	List<DepartureBean> deps = f.lookupDepartures("AR", "FJRN");
271	for(DepartureBean d : deps) {
272	System.out.println( d.getTime() + ";" + d.getUpdated() + ";" + d.getTrainNumber() + ";" +
273	d.getDestination() + ";" + d.getOrigin() + ";" + d.getLocation() + ";" + d.getStatus() + ";" + d.getNote() );
274	}
275
276	System.out.println("--------------------------");
277	}*/
278	}