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;
import dk.thoerup.traininfoservice.Statistics;

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 {
                        Statistics.getInstance().incrementTimetableCacheHits();
                        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	import dk.thoerup.traininfoservice.Statistics;
22
23	public class TimetableFetcher {
24
25	class NullRefreshHandler implements RefreshHandler {
26	public void handleRefresh(Page arg0, URL arg1, int arg2) throws IOException {
27	}
28
29	}
30
31	Map<String, List<TimetableBean>> cache;
32
33
34	Logger logger = Logger.getLogger(TimetableFetcher.class.getName());
35
36	private boolean useTempSite;
37
38	public TimetableFetcher(boolean tmpSite, int cacheTimeout) {
39	useTempSite = tmpSite;
40
41	cache = new TimeoutMap<String,List<TimetableBean>>(cacheTimeout);
42	}
43
44
45	List<TimetableBean> cachedLookupTimetable(String trainID, String type) throws Exception {
46	String key = trainID+type;
47	List<TimetableBean> list = cache.get(key);
48
49	if (list == null) {
50	list = lookupTimetable(trainID,type);
51	cache.put(key, list);
52	} else {
53	Statistics.getInstance().incrementTimetableCacheHits();
54	logger.info("Timetable: Cache hit " + trainID);
55	}
56	return list;
57	}
58
59	List<TimetableBean> lookupTimetable(String trainID, String type) throws Exception {
60	if (useTempSite == false ){
61	return lookupTimetableRealSite(trainID, type);
62	} else {
63	return new ArrayList<TimetableBean>(); // no timetable data on temp site
64	}
65	}
66
67	List<TimetableBean> lookupTimetableRealSite(String trainID, String type) throws Exception {
68	List<TimetableBean> timetableList = new ArrayList<TimetableBean>();
69
70	String url = "http://www.bane.dk/visRute.asp?W=" + type + "&TogNr=" + trainID + "&artikelId=4276";
71
72
73	final WebClient webClient = new WebClient(BrowserVersion.FIREFOX_3);
74	webClient.setTimeout(2500);
75	webClient.setJavaScriptEnabled(false);
76	webClient.setRefreshHandler( new NullRefreshHandler() );
77	webClient.setCssEnabled(false);
78
79
80	BanedkInvocation wrapper = new BanedkInvocation(webClient, url);
81	CircuitBreaker breaker = CircuitBreakerManager.getManager().getCircuitBreaker("banedk");
82
83	HtmlPage page = (HtmlPage) breaker.invoke(wrapper);
84
85
86	boolean currentStation = false;
87	boolean currentStationSaved = false;
88
89	List<HtmlElement> tables = page.getDocumentElement().getElementsByAttribute("table", "class", "Rute");
90	if (tables.size() == 1) {
91	HtmlElement timetable = tables.get(0);
92	DomNodeList<HtmlElement> rows = timetable.getElementsByTagName("tr");
93
94	for (int i=0; i<rows.size(); i++) {
95	if (i==0) //First row is column headers
96	continue;
97
98
99	HtmlElement row = rows.get(i);
100	DomNodeList<HtmlElement> fields = row.getElementsByTagName("td");
101
102	if (currentStationSaved == false && fields.get(0).getAttribute("class").equalsIgnoreCase("Tidsstreg")) {
103	currentStation = true;
104	continue;
105	}
106
107	TimetableBean bean = new TimetableBean();
108	bean.setStation( fields.get(0).asText() );
109	bean.setArrival( fields.get(1).asText() );
110	bean.setDeparture( fields.get(2).asText() );
111
112	if (currentStation == true && currentStationSaved == false ) {
113	bean.setCurrent(currentStation);
114	currentStationSaved = true;
115	}
116
117	timetableList.add(bean);
118
119	}
120
121	} else {
122	logger.warning("No time table found, trainID=" + trainID + " type=" + type);
123	}
124	webClient.closeAllWindows();
125
126	return timetableList;
127	}
128
129	}