1 |
torben |
811 |
package dk.thoerup.traininfoservice; |
2 |
|
|
|
3 |
|
|
import java.util.Timer; |
4 |
|
|
import java.util.TimerTask; |
5 |
torben |
816 |
import java.util.logging.Logger; |
6 |
torben |
811 |
|
7 |
|
|
import javax.servlet.ServletContext; |
8 |
|
|
import javax.servlet.ServletContextEvent; |
9 |
|
|
import javax.servlet.ServletContextListener; |
10 |
torben |
959 |
import javax.servlet.annotation.WebListener; |
11 |
torben |
811 |
|
12 |
torben |
959 |
@WebListener |
13 |
torben |
811 |
public class StatisticsListener implements ServletContextListener { |
14 |
torben |
816 |
|
15 |
|
|
Logger log = Logger.getLogger(StatisticsListener.class.getName()); |
16 |
torben |
811 |
|
17 |
|
|
Timer timer = null; |
18 |
|
|
int update_interval; |
19 |
|
|
|
20 |
|
|
public void contextInitialized(ServletContextEvent sce) { |
21 |
|
|
|
22 |
|
|
update_interval = getUpdateInterval( sce.getServletContext() ); |
23 |
torben |
816 |
|
24 |
|
|
log.info("StatisticsListener::contextInit called update_interval=" + update_interval); |
25 |
|
|
|
26 |
torben |
811 |
if ( update_interval > 0 ) { |
27 |
|
|
timer = new Timer(); |
28 |
|
|
|
29 |
|
|
TimerTask statsUpdate = new TimerTask() { |
30 |
|
|
@Override |
31 |
|
|
public void run() { |
32 |
|
|
Statistics.getInstance().saveStats(); |
33 |
|
|
} |
34 |
|
|
}; |
35 |
|
|
|
36 |
|
|
timer.schedule(statsUpdate, 0, update_interval); |
37 |
|
|
} |
38 |
|
|
} |
39 |
|
|
|
40 |
|
|
|
41 |
|
|
public void contextDestroyed(ServletContextEvent sce) { |
42 |
torben |
816 |
log.info("StatisticsListener::contextDestroyed"); |
43 |
torben |
811 |
if ( update_interval > 0 ) { |
44 |
|
|
timer.cancel(); |
45 |
torben |
814 |
Statistics.getInstance().saveStats(); |
46 |
torben |
811 |
} |
47 |
|
|
} |
48 |
|
|
|
49 |
|
|
private int getUpdateInterval(ServletContext cntx) { |
50 |
|
|
int interval = 0; |
51 |
|
|
try { |
52 |
|
|
String intervalStr = cntx.getInitParameter("stats_interval"); |
53 |
|
|
interval = Integer.parseInt(intervalStr); |
54 |
|
|
} catch (Exception e) {} |
55 |
|
|
|
56 |
|
|
return interval; |
57 |
|
|
} |
58 |
|
|
} |