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	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	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
17	import dk.thoerup.curcuitbreaker.CircuitBreaker;
18	import dk.thoerup.curcuitbreaker.CircuitBreakerManager;
19
20	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
28	TimeoutCache<String, List<TimetableBean>> cache = new TimeoutCache<String,List<TimetableBean>>(120 * 1000);
29
30
31	Logger logger = Logger.getLogger(TimetableFetcher.class.getName());
32
33
34	List<TimetableBean> cachedLookupTimetable(String trainID, String type) throws Throwable {
35	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	logger.info("Timetable: Cache hit " + trainID);
43	}
44	return list;
45	}
46
47	List<TimetableBean> lookupTimetable(String trainID, String type) throws Throwable {
48	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	webClient.setTimeout(2500);
55	webClient.setJavaScriptEnabled(false);
56	webClient.setRefreshHandler( new NullRefreshHandler() );
57	webClient.setCssEnabled(false);
58
59
60	BanedkInvocation wrapper = new BanedkInvocation(webClient, url);
61	CircuitBreaker breaker = CircuitBreakerManager.getManager().getCircuitBreaker("banedk");
62
63	HtmlPage page = (HtmlPage) breaker.invoke(wrapper);
64
65
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	}