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.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.curcuitbreaker.CircuitBreaker;
import dk.thoerup.curcuitbreaker.CircuitBreakerManager;

public class TimetableFetcher {
        
        class NullRefreshHandler implements RefreshHandler {
                public void handleRefresh(Page arg0, URL arg1, int arg2) throws IOException {                   
                }
                
        }
                
        TimeoutCache<String, List<TimetableBean>> cache = new TimeoutCache<String,List<TimetableBean>>(120 * 1000);
        
        
        Logger logger = Logger.getLogger(TimetableFetcher.class.getName());
        
        
        List<TimetableBean> cachedLookupTimetable(String trainID, String type) throws Throwable {
                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 Throwable {             
                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			import java.util.logging.Logger;
9
10	torben	387	import com.gargoylesoftware.htmlunit.Page;
11			import com.gargoylesoftware.htmlunit.RefreshHandler;
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	torben	350
17	torben	421	import dk.thoerup.curcuitbreaker.CircuitBreaker;
18			import dk.thoerup.curcuitbreaker.CircuitBreakerManager;
19
20	torben	350	public class TimetableFetcher {
21
22			class NullRefreshHandler implements RefreshHandler {
23			public void handleRefresh(Page arg0, URL arg1, int arg2) throws IOException {
24			}
25
26			}
27	torben	387
28			TimeoutCache<String, List<TimetableBean>> cache = new TimeoutCache<String,List<TimetableBean>>(120 * 1000);
29	torben	350
30	torben	387
31	torben	350	Logger logger = Logger.getLogger(TimetableFetcher.class.getName());
32	torben	387
33
34	torben	421	List<TimetableBean> cachedLookupTimetable(String trainID, String type) throws Throwable {
35	torben	387	String key = trainID+type;
36			List<TimetableBean> list = cache.get(key);
37
38			if (list == null) {
39			list = lookupTimetable(trainID,type);
40			cache.put(key, list);
41			} else {
42	torben	389	logger.info("Timetable: Cache hit " + trainID);
43	torben	387	}
44			return list;
45			}
46	torben	350
47	torben	421	List<TimetableBean> lookupTimetable(String trainID, String type) throws Throwable {
48	torben	350	List<TimetableBean> timetableList = new ArrayList<TimetableBean>();
49
50			String url = "http://www.bane.dk/visRute.asp?W=" + type + "&TogNr=" + trainID + "&artikelId=4276";
51
52
53			final WebClient webClient = new WebClient();
54	torben	386	webClient.setTimeout(2500);
55	torben	350	webClient.setJavaScriptEnabled(false);
56			webClient.setRefreshHandler( new NullRefreshHandler() );
57			webClient.setCssEnabled(false);
58
59
60	torben	421	BanedkInvocation wrapper = new BanedkInvocation(webClient, url);
61			CircuitBreaker breaker = CircuitBreakerManager.getManager().getCircuitBreaker("banedk");
62	torben	350
63	torben	421	HtmlPage page = (HtmlPage) breaker.invoke(wrapper);
64
65	torben	350
66			boolean currentStation = false;
67			boolean currentStationSaved = false;
68
69			List<HtmlElement> tables = page.getDocumentElement().getElementsByAttribute("table", "class", "Rute");
70			if (tables.size() == 1) {
71			HtmlElement timetable = tables.get(0);
72			DomNodeList<HtmlElement> rows = timetable.getElementsByTagName("tr");
73
74			for (int i=0; i<rows.size(); i++) {
75			if (i==0) //First row is column headers
76			continue;
77
78
79			HtmlElement row = rows.get(i);
80			DomNodeList<HtmlElement> fields = row.getElementsByTagName("td");
81
82			if (currentStationSaved == false && fields.get(0).getAttribute("class").equalsIgnoreCase("Tidsstreg")) {
83			currentStation = true;
84			continue;
85			}
86
87			TimetableBean bean = new TimetableBean();
88			bean.setStation( fields.get(0).asText() );
89			bean.setArrival( fields.get(1).asText() );
90			bean.setDeparture( fields.get(2).asText() );
91
92			if (currentStation == true && currentStationSaved == false ) {
93			bean.setCurrent(currentStation);
94			currentStationSaved = true;
95			}
96
97			timetableList.add(bean);
98
99			}
100
101			} else {
102			logger.warning("No time table found, trainID=" + trainID + " type=" + type);
103			}
104
105			return timetableList;
106			}
107
108			}