traininfoservice/banedk/TimetableFetcher.java

package dk.thoerup.traininfoservice.banedk;


import java.io.IOException;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.logging.Logger;

import com.gargoylesoftware.htmlunit.Page;
import com.gargoylesoftware.htmlunit.RefreshHandler;
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;

public class TimetableFetcher {
        
        class NullRefreshHandler implements RefreshHandler {
                public void handleRefresh(Page arg0, URL arg1, int arg2) throws IOException {                   
                }
                
        }
                
        Map<String, List<TimetableBean>> cache; 
        
        
        Logger logger = Logger.getLogger(TimetableFetcher.class.getName());
        
        private boolean useTempSite;
        
        public TimetableFetcher(boolean tmpSite, int cacheTimeout) {
                useTempSite = tmpSite;
                
                cache = new TimeoutMap<String,List<TimetableBean>>(cacheTimeout);
        }
        
        
        List<TimetableBean> cachedLookupTimetable(String trainID, String type) throws Exception {
                String key = trainID+type;
                List<TimetableBean> list = cache.get(key);
                
                if (list == null) {
                        list = lookupTimetable(trainID,type);
                        cache.put(key, list);
                } else {
                        logger.info("Timetable: Cache hit " + trainID); 
                }
                return list;
        }
        
        List<TimetableBean> lookupTimetable(String trainID, String type) throws Exception {
                if (useTempSite == false ){
                        return lookupTimetableRealSite(trainID, type);
                } else {
                        return new ArrayList<TimetableBean>(); // no timetable data on temp site
                }
        }

        List<TimetableBean> lookupTimetableRealSite(String trainID, String type) throws Exception {             
                List<TimetableBean> timetableList = new ArrayList<TimetableBean>();
                
                String url = "http://www.bane.dk/visRute.asp?W=" + type + "&TogNr=" + trainID + "&artikelId=4276";
                                

            final WebClient webClient = new WebClient();
            webClient.setTimeout(2500);
            webClient.setJavaScriptEnabled(false);         
            webClient.setRefreshHandler( new NullRefreshHandler() );
            webClient.setCssEnabled(false);
            
            
            BanedkInvocation wrapper = new BanedkInvocation(webClient, url);
            CircuitBreaker breaker = CircuitBreakerManager.getManager().getCircuitBreaker("banedk");
            
            HtmlPage page = (HtmlPage) breaker.invoke(wrapper);
                    
            
            boolean currentStation = false;
            boolean currentStationSaved = false;
            
            List<HtmlElement> tables = page.getDocumentElement().getElementsByAttribute("table", "class", "Rute");
            if (tables.size() == 1) {
                HtmlElement timetable = tables.get(0);
                DomNodeList<HtmlElement> rows = timetable.getElementsByTagName("tr");
                
                for (int i=0; i<rows.size(); i++) {
                        if (i==0) //First row is column headers
                                continue;
                        
                        
                        HtmlElement row = rows.get(i);
                        DomNodeList<HtmlElement> fields = row.getElementsByTagName("td");
                        
                        if (currentStationSaved == false && fields.get(0).getAttribute("class").equalsIgnoreCase("Tidsstreg")) {
                                currentStation = true;
                                continue;
                        }
                        
                        TimetableBean bean = new TimetableBean();
                        bean.setStation( fields.get(0).asText() );
                        bean.setArrival( fields.get(1).asText() );
                        bean.setDeparture( fields.get(2).asText() );
                        
                        if (currentStation == true && currentStationSaved == false ) {
                                bean.setCurrent(currentStation);
                                currentStationSaved = true;
                        }
                        
                        timetableList.add(bean);

                }
                
            } else {
                logger.warning("No time table found, trainID=" + trainID + " type=" + type);
            }
                
                return timetableList;
        }
        
}
1	torben	350	package dk.thoerup.traininfoservice.banedk;
2
3
4			import java.io.IOException;
5			import java.net.URL;
6			import java.util.ArrayList;
7			import java.util.List;
8	torben	428	import java.util.Map;
9	torben	350	import java.util.logging.Logger;
10
11	torben	387	import com.gargoylesoftware.htmlunit.Page;
12			import com.gargoylesoftware.htmlunit.RefreshHandler;
13			import com.gargoylesoftware.htmlunit.WebClient;
14			import com.gargoylesoftware.htmlunit.html.DomNodeList;
15			import com.gargoylesoftware.htmlunit.html.HtmlElement;
16			import com.gargoylesoftware.htmlunit.html.HtmlPage;
17	torben	350
18	torben	468	import dk.thoerup.circuitbreaker.CircuitBreaker;
19			import dk.thoerup.circuitbreaker.CircuitBreakerManager;
20	torben	421
21	torben	350	public class TimetableFetcher {
22
23			class NullRefreshHandler implements RefreshHandler {
24			public void handleRefresh(Page arg0, URL arg1, int arg2) throws IOException {
25			}
26
27			}
28	torben	387
29	torben	584	Map<String, List<TimetableBean>> cache;
30	torben	350
31	torben	387
32	torben	350	Logger logger = Logger.getLogger(TimetableFetcher.class.getName());
33	torben	387
34	torben	581	private boolean useTempSite;
35	torben	387
36	torben	584	public TimetableFetcher(boolean tmpSite, int cacheTimeout) {
37	torben	581	useTempSite = tmpSite;
38	torben	584
39			cache = new TimeoutMap<String,List<TimetableBean>>(cacheTimeout);
40	torben	581	}
41
42
43	torben	451	List<TimetableBean> cachedLookupTimetable(String trainID, String type) throws Exception {
44	torben	387	String key = trainID+type;
45			List<TimetableBean> list = cache.get(key);
46
47			if (list == null) {
48			list = lookupTimetable(trainID,type);
49			cache.put(key, list);
50			} else {
51	torben	389	logger.info("Timetable: Cache hit " + trainID);
52	torben	387	}
53			return list;
54			}
55	torben	581
56			List<TimetableBean> lookupTimetable(String trainID, String type) throws Exception {
57			if (useTempSite == false ){
58			return lookupTimetableRealSite(trainID, type);
59			} else {
60			return new ArrayList<TimetableBean>(); // no timetable data on temp site
61			}
62			}
63	torben	350
64	torben	581	List<TimetableBean> lookupTimetableRealSite(String trainID, String type) throws Exception {
65	torben	350	List<TimetableBean> timetableList = new ArrayList<TimetableBean>();
66
67			String url = "http://www.bane.dk/visRute.asp?W=" + type + "&TogNr=" + trainID + "&artikelId=4276";
68
69
70			final WebClient webClient = new WebClient();
71	torben	386	webClient.setTimeout(2500);
72	torben	350	webClient.setJavaScriptEnabled(false);
73			webClient.setRefreshHandler( new NullRefreshHandler() );
74			webClient.setCssEnabled(false);
75
76
77	torben	421	BanedkInvocation wrapper = new BanedkInvocation(webClient, url);
78			CircuitBreaker breaker = CircuitBreakerManager.getManager().getCircuitBreaker("banedk");
79	torben	350
80	torben	421	HtmlPage page = (HtmlPage) breaker.invoke(wrapper);
81
82	torben	350
83			boolean currentStation = false;
84			boolean currentStationSaved = false;
85
86			List<HtmlElement> tables = page.getDocumentElement().getElementsByAttribute("table", "class", "Rute");
87			if (tables.size() == 1) {
88			HtmlElement timetable = tables.get(0);
89			DomNodeList<HtmlElement> rows = timetable.getElementsByTagName("tr");
90
91			for (int i=0; i<rows.size(); i++) {
92			if (i==0) //First row is column headers
93			continue;
94
95
96			HtmlElement row = rows.get(i);
97			DomNodeList<HtmlElement> fields = row.getElementsByTagName("td");
98
99			if (currentStationSaved == false && fields.get(0).getAttribute("class").equalsIgnoreCase("Tidsstreg")) {
100			currentStation = true;
101			continue;
102			}
103
104			TimetableBean bean = new TimetableBean();
105			bean.setStation( fields.get(0).asText() );
106			bean.setArrival( fields.get(1).asText() );
107			bean.setDeparture( fields.get(2).asText() );
108
109			if (currentStation == true && currentStationSaved == false ) {
110			bean.setCurrent(currentStation);
111			currentStationSaved = true;
112			}
113
114			timetableList.add(bean);
115
116			}
117
118			} else {
119			logger.warning("No time table found, trainID=" + trainID + " type=" + type);
120			}
121
122			return timetableList;
123			}
124
125			}