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	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.Map;
9	import java.util.logging.Logger;
10
11	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
18	import dk.thoerup.circuitbreaker.CircuitBreaker;
19	import dk.thoerup.circuitbreaker.CircuitBreakerManager;
20
21	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
29	Map<String, List<TimetableBean>> cache;
30
31
32	Logger logger = Logger.getLogger(TimetableFetcher.class.getName());
33
34	private boolean useTempSite;
35
36	public TimetableFetcher(boolean tmpSite, int cacheTimeout) {
37	useTempSite = tmpSite;
38
39	cache = new TimeoutMap<String,List<TimetableBean>>(cacheTimeout);
40	}
41
42
43	List<TimetableBean> cachedLookupTimetable(String trainID, String type) throws Exception {
44	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	logger.info("Timetable: Cache hit " + trainID);
52	}
53	return list;
54	}
55
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
64	List<TimetableBean> lookupTimetableRealSite(String trainID, String type) throws Exception {
65	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	webClient.setTimeout(2500);
72	webClient.setJavaScriptEnabled(false);
73	webClient.setRefreshHandler( new NullRefreshHandler() );
74	webClient.setCssEnabled(false);
75
76
77	BanedkInvocation wrapper = new BanedkInvocation(webClient, url);
78	CircuitBreaker breaker = CircuitBreakerManager.getManager().getCircuitBreaker("banedk");
79
80	HtmlPage page = (HtmlPage) breaker.invoke(wrapper);
81
82
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	}