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.BrowserVersion;
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(BrowserVersion.FIREFOX_3);
            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);
            }
            webClient.closeAllWindows();
                
                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.BrowserVersion;
12	import com.gargoylesoftware.htmlunit.Page;
13	import com.gargoylesoftware.htmlunit.RefreshHandler;
14	import com.gargoylesoftware.htmlunit.WebClient;
15	import com.gargoylesoftware.htmlunit.html.DomNodeList;
16	import com.gargoylesoftware.htmlunit.html.HtmlElement;
17	import com.gargoylesoftware.htmlunit.html.HtmlPage;
18
19	import dk.thoerup.circuitbreaker.CircuitBreaker;
20	import dk.thoerup.circuitbreaker.CircuitBreakerManager;
21
22	public class TimetableFetcher {
23
24	class NullRefreshHandler implements RefreshHandler {
25	public void handleRefresh(Page arg0, URL arg1, int arg2) throws IOException {
26	}
27
28	}
29
30	Map<String, List<TimetableBean>> cache;
31
32
33	Logger logger = Logger.getLogger(TimetableFetcher.class.getName());
34
35	private boolean useTempSite;
36
37	public TimetableFetcher(boolean tmpSite, int cacheTimeout) {
38	useTempSite = tmpSite;
39
40	cache = new TimeoutMap<String,List<TimetableBean>>(cacheTimeout);
41	}
42
43
44	List<TimetableBean> cachedLookupTimetable(String trainID, String type) throws Exception {
45	String key = trainID+type;
46	List<TimetableBean> list = cache.get(key);
47
48	if (list == null) {
49	list = lookupTimetable(trainID,type);
50	cache.put(key, list);
51	} else {
52	logger.info("Timetable: Cache hit " + trainID);
53	}
54	return list;
55	}
56
57	List<TimetableBean> lookupTimetable(String trainID, String type) throws Exception {
58	if (useTempSite == false ){
59	return lookupTimetableRealSite(trainID, type);
60	} else {
61	return new ArrayList<TimetableBean>(); // no timetable data on temp site
62	}
63	}
64
65	List<TimetableBean> lookupTimetableRealSite(String trainID, String type) throws Exception {
66	List<TimetableBean> timetableList = new ArrayList<TimetableBean>();
67
68	String url = "http://www.bane.dk/visRute.asp?W=" + type + "&TogNr=" + trainID + "&artikelId=4276";
69
70
71	final WebClient webClient = new WebClient(BrowserVersion.FIREFOX_3);
72	webClient.setTimeout(2500);
73	webClient.setJavaScriptEnabled(false);
74	webClient.setRefreshHandler( new NullRefreshHandler() );
75	webClient.setCssEnabled(false);
76
77
78	BanedkInvocation wrapper = new BanedkInvocation(webClient, url);
79	CircuitBreaker breaker = CircuitBreakerManager.getManager().getCircuitBreaker("banedk");
80
81	HtmlPage page = (HtmlPage) breaker.invoke(wrapper);
82
83
84	boolean currentStation = false;
85	boolean currentStationSaved = false;
86
87	List<HtmlElement> tables = page.getDocumentElement().getElementsByAttribute("table", "class", "Rute");
88	if (tables.size() == 1) {
89	HtmlElement timetable = tables.get(0);
90	DomNodeList<HtmlElement> rows = timetable.getElementsByTagName("tr");
91
92	for (int i=0; i<rows.size(); i++) {
93	if (i==0) //First row is column headers
94	continue;
95
96
97	HtmlElement row = rows.get(i);
98	DomNodeList<HtmlElement> fields = row.getElementsByTagName("td");
99
100	if (currentStationSaved == false && fields.get(0).getAttribute("class").equalsIgnoreCase("Tidsstreg")) {
101	currentStation = true;
102	continue;
103	}
104
105	TimetableBean bean = new TimetableBean();
106	bean.setStation( fields.get(0).asText() );
107	bean.setArrival( fields.get(1).asText() );
108	bean.setDeparture( fields.get(2).asText() );
109
110	if (currentStation == true && currentStationSaved == false ) {
111	bean.setCurrent(currentStation);
112	currentStationSaved = true;
113	}
114
115	timetableList.add(bean);
116
117	}
118
119	} else {
120	logger.warning("No time table found, trainID=" + trainID + " type=" + type);
121	}
122	webClient.closeAllWindows();
123
124	return timetableList;
125	}
126
127	}