traininfoservice/banedk/DepartureFetcher.java

package dk.thoerup.traininfoservice.banedk;

import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.Statement;
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.DBConnection;

public class DepartureFetcher {
        
        Logger logger = Logger.getLogger(DepartureFetcher.class.getName());
        
        Map<Integer, List<DepartureBean>> cache = new TimeoutMap<Integer,List<DepartureBean>>(120 * 1000);
        
        private boolean useTempSite;
        
        public DepartureFetcher(boolean tempSite) {
                useTempSite = tempSite;
        }
        
        
        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>();
                
                Connection conn = null;
                try 
                {
                        conn = DBConnection.getConnection();
                
                        String SQL = "SELECT stationcode_fjrn, stationcode_stog FROM trainstations WHERE id=" + stationID;
                        Statement stmt = conn.createStatement();
                        ResultSet rs = stmt.executeQuery(SQL);
                        
                        if (rs.next()) {
                                String code = rs.getString( 1 );
                                if (! rs.wasNull() ) {
                                        List<DepartureBean> list = lookupDepartures(code, "FJRN");
                                        departureList.addAll(list);
                                }
                                
                                code = rs.getString(2);
                                if (! rs.wasNull() ) {
                                        List<DepartureBean> list = lookupDepartures(code, "S2");
                                        departureList.addAll(list);     
                                }
                                Collections.sort( departureList );
                        
                        }
                        
                } finally {
                        if (conn != null && !conn.isClosed() ) {
                                conn.close();
                        }
                }
                
                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.sql.Connection;
4	import java.sql.ResultSet;
5	import java.sql.Statement;
6	import java.util.ArrayList;
7	import java.util.Collections;
8	import java.util.List;
9	import java.util.Map;
10	import java.util.logging.Logger;
11
12	import com.gargoylesoftware.htmlunit.WebClient;
13	import com.gargoylesoftware.htmlunit.html.DomNodeList;
14	import com.gargoylesoftware.htmlunit.html.HtmlElement;
15	import com.gargoylesoftware.htmlunit.html.HtmlPage;
16
17	import dk.thoerup.circuitbreaker.CircuitBreaker;
18	import dk.thoerup.circuitbreaker.CircuitBreakerManager;
19	import dk.thoerup.traininfoservice.DBConnection;
20
21	public class DepartureFetcher {
22
23	Logger logger = Logger.getLogger(DepartureFetcher.class.getName());
24
25	Map<Integer, List<DepartureBean>> cache = new TimeoutMap<Integer,List<DepartureBean>>(120 * 1000);
26
27	private boolean useTempSite;
28
29	public DepartureFetcher(boolean tempSite) {
30	useTempSite = tempSite;
31	}
32
33
34
35
36	public List<DepartureBean> cachedLookupDepartures(int stationID) throws Exception {
37
38	List<DepartureBean> list = cache.get(stationID);
39
40	if (list == null) {
41	list = lookupDepartures(stationID);
42	cache.put(stationID, list);
43	} else {
44	logger.info("Departure: Cache hit " + stationID); //remove before production
45	}
46	return list;
47	}
48
49
50	public List<DepartureBean> lookupDepartures(int stationID) throws Exception {
51	List<DepartureBean> departureList = new ArrayList<DepartureBean>();
52
53	Connection conn = null;
54	try
55	{
56	conn = DBConnection.getConnection();
57
58	String SQL = "SELECT stationcode_fjrn, stationcode_stog FROM trainstations WHERE id=" + stationID;
59	Statement stmt = conn.createStatement();
60	ResultSet rs = stmt.executeQuery(SQL);
61
62	if (rs.next()) {
63	String code = rs.getString( 1 );
64	if (! rs.wasNull() ) {
65	List<DepartureBean> list = lookupDepartures(code, "FJRN");
66	departureList.addAll(list);
67	}
68
69	code = rs.getString(2);
70	if (! rs.wasNull() ) {
71	List<DepartureBean> list = lookupDepartures(code, "S2");
72	departureList.addAll(list);
73	}
74	Collections.sort( departureList );
75
76	}
77
78	} finally {
79	if (conn != null && !conn.isClosed() ) {
80	conn.close();
81	}
82	}
83
84	return departureList;
85	}
86
87	public List<DepartureBean> lookupDepartures(String stationcode, String type) throws Exception {
88	if (useTempSite == false) {
89	return lookupDeparturesNormalSite(stationcode, type);
90	} else {
91	return lookupDeparturesFromTemporarySite(stationcode, type);
92	}
93	}
94
95	public List<DepartureBean> lookupDeparturesNormalSite(String stationcode, String type) throws Exception {
96
97	List<DepartureBean> departureList = new ArrayList<DepartureBean>();
98
99	final WebClient webClient = new WebClient();
100	webClient.setTimeout(2500);
101	webClient.setJavaScriptEnabled(false);
102
103	String uri = "http://www.bane.dk/visStation.asp?ArtikelID=4275&W=" + type + "&S=" + stationcode;
104	BanedkInvocation wrapper = new BanedkInvocation(webClient, uri);
105	CircuitBreaker breaker = CircuitBreakerManager.getManager().getCircuitBreaker("banedk");
106
107	HtmlPage page = (HtmlPage) breaker.invoke(wrapper);
108
109	HtmlElement table = page.getElementById("afgangtabel");
110
111	if (table != null) {
112	DomNodeList<HtmlElement> tableRows = table.getElementsByTagName("tr");
113
114	for (HtmlElement currentRow : tableRows) {
115	String rowClass = currentRow.getAttribute("class");
116	if (rowClass != null && rowClass.toLowerCase().contains("station") ) {
117	DomNodeList<HtmlElement> fields = currentRow.getElementsByTagName("td");
118
119	DepartureBean departure = new DepartureBean();
120
121	String time = fields.get(0).asText();
122	if (time.equals(""))
123	time = "0:00"; //Bane.dk bug work-around
124	departure.setTime(time);
125
126	int updated = extractUpdated( fields.get(1) );
127	departure.setUpdated(updated);
128
129	String trainNumber = fields.get(2).asText();
130	if (type.equalsIgnoreCase("S2")) //If it is S-train we need to extract the trainNumber
131	trainNumber = trainNumber + " " + extractTrainNumber(fields.get(2));
132	departure.setTrainNumber(trainNumber);
133
134	String destination = fields.get(3).asText();
135	departure.setDestination(destination);
136
137	String origin = fields.get(4).asText();
138	departure.setOrigin(origin);
139
140	String location = fields.get(5).asText();
141	departure.setLocation(location);
142
143	String status = fields.get(6).asText();
144	departure.setStatus(status);
145
146	String note = extractNote( fields.get(7) );
147	departure.setNote(note);
148
149	departureList.add(departure);
150	}
151	}
152	} else {
153	logger.warning("No departures found for station=" + stationcode + ", type=" + type);
154	}
155
156	return departureList;
157	}
158
159	public List<DepartureBean> lookupDeparturesFromTemporarySite(String stationcode, String type) throws Exception {
160
161	List<DepartureBean> departureList = new ArrayList<DepartureBean>();
162
163	final WebClient webClient = new WebClient();
164	webClient.setTimeout(2500);
165	webClient.setJavaScriptEnabled(false);
166
167
168	String uri = "http://bane.dk/lite/station.asp?w=" + type + "&s=" + stationcode;
169
170	BanedkInvocation wrapper = new BanedkInvocation(webClient, uri);
171	CircuitBreaker breaker = CircuitBreakerManager.getManager().getCircuitBreaker("banedk");
172
173	HtmlPage page = (HtmlPage) breaker.invoke(wrapper);
174
175	HtmlElement table = page.getElementById("traf_afgang");
176
177	if (table != null) {
178	DomNodeList<HtmlElement> tableRows = table.getElementsByTagName("tr");
179
180	boolean isFirst = true;
181
182	for (HtmlElement currentRow : tableRows) {
183	if (isFirst == true) { //skip table headers
184	isFirst = false;
185	continue;
186	}
187
188	DomNodeList<HtmlElement> fields = currentRow.getElementsByTagName("td");
189
190	DepartureBean departure = new DepartureBean();
191
192	String time = fields.get(0).asText().trim();
193
194	if (time.equals(""))
195	time = "0:00"; //Bane.dk bug work-around
196	departure.setTime(time);
197
198
199	String trainNumber = fields.get(1).asText();
200	departure.setTrainNumber(trainNumber);
201
202	String destination = fields.get(2).asText();
203	departure.setDestination(destination);
204
205	String origin = fields.get(3).asText();
206	departure.setOrigin(origin);
207
208	String status = fields.get(4).asText();
209	departure.setStatus(status);
210
211	String note = fields.get(5).asText();
212	departure.setNote(note);
213
214	departureList.add(departure);
215	}
216	} else {
217	logger.warning("No departures found for station=" + stationcode + ", type=" + type);
218	}
219
220	return departureList;
221	}
222
223
224	private int extractUpdated(HtmlElement updatedTd) { //extract the digit (in this case: 4) from "media/trafikinfo/opdater4.gif"
225	int updated = -1;
226
227	DomNodeList<HtmlElement> updatedImgs = updatedTd.getElementsByTagName("img");
228	String updatedStr = updatedImgs.get(0).getAttribute("src");
229
230	if (updatedStr != null) {
231	for (int i=0; i<updatedStr.length(); i++) {
232	char c = updatedStr.charAt(i);
233	if ( Character.isDigit(c)) {
234	updated = Character.digit(c, 10);
235	break;
236	}
237	}
238	}
239	return updated;
240	}
241
242	private String extractNote(HtmlElement noteTd) {
243	String note = noteTd.asText().trim();
244
245	List<HtmlElement> elems = noteTd.getElementsByAttribute("span", "class", "bemtype");
246	if (elems.size() > 0 && note.charAt(note.length()-1) == 'i')
247	note = note.substring(0,note.length() -1 );
248
249	return note;
250	}
251
252	private String extractTrainNumber(HtmlElement trainTd) {
253	String number = "";
254	HtmlElement anchorElement = trainTd.getElementsByTagName("a").get(0);
255	String href = anchorElement.getAttribute("href");
256	String argstring = href.substring( href.indexOf('?') + 1);
257
258	String args[] = argstring.split("&");
259	for (String arg : args) {
260	String pair[] = arg.split("="); // Key=pair[0], Value=pair[1]
261
262	if (pair[0].equalsIgnoreCase("TogNr"))
263	number = pair[1];
264	}
265
266
267
268	return number;
269	}
270
271	//test
272	/*
273	public static void main(String args[]) throws Exception {
274	DepartureFetcher f = new DepartureFetcher();
275	List<DepartureBean> deps = f.lookupDepartures("AR", "FJRN");
276	for(DepartureBean d : deps) {
277	System.out.println( d.getTime() + ";" + d.getUpdated() + ";" + d.getTrainNumber() + ";" +
278	d.getDestination() + ";" + d.getOrigin() + ";" + d.getLocation() + ";" + d.getStatus() + ";" + d.getNote() );
279	}
280
281	System.out.println("--------------------------");
282	}*/
283	}