server/compbio/listeners/ContextListener.java

   1 package compbio.listeners;
   2
   3 import java.io.IOException;
   4 import java.util.concurrent.Executors;
   5 import java.util.concurrent.ScheduledExecutorService;
   6 import java.util.concurrent.TimeUnit;
   7
   8 import javax.servlet.ServletContextEvent;
   9 import javax.servlet.ServletContextListener;
  10 import javax.servlet.annotation.WebListener;
  11
  12 import compbio.cassandra.CassandraNativeConnector;
  13
  14 /**
  15  * Application Lifecycle Listener implementation class ContextListener
  16  *
  17  */
  18 @WebListener
  19 public class ContextListener implements ServletContextListener {
  20         private ScheduledExecutorService webjob_scheduler;
  21         CassandraNativeConnector db = new CassandraNativeConnector();
  22
  23         /**
  24          * @see ServletContextListener#contextInitialized(ServletContextEvent)
  25          */
  26         public void contextInitialized(ServletContextEvent arg0) {
  27                 System.out.println("ProteoCache session start......");
  28                 db.Connect();
  29
  30                 webjob_scheduler = Executors.newSingleThreadScheduledExecutor();
  31                 webjob_scheduler.scheduleAtFixedRate(new Runnable() {
  32                         @Override
  33                         public void run() {
  34                                 try {
  35                                         db.Parsing();
  36                                 } catch (IOException e) {
  37                                         // TODO Auto-generated catch block
  38                                         e.printStackTrace();
  39                                 }
  40                         }
  41                 }, 0, 600, TimeUnit.SECONDS);
  42
  43         }
  44
  45         /**
  46          * @see ServletContextListener#contextDestroyed(ServletContextEvent)
  47          */
  48         public void contextDestroyed(ServletContextEvent arg0) {
  49                 db.Closing();
  50                 System.out.println("Shut down ProteoCache......");
  51                 webjob_scheduler.shutdownNow();
  52         }
  53
  54 }