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 import compbio.engine.ProteoCachePropertyHelperManager;
  14 import compbio.util.PropertyHelper;
  15
  16 /**
  17  * Application Lifecycle Listener implementation class ContextListener
  18  *
  19  */
  20 @WebListener
  21 public class ContextListener implements ServletContextListener {
  22         private ScheduledExecutorService webjob_scheduler;
  23         CassandraNativeConnector db = new CassandraNativeConnector();
  24         static PropertyHelper ph = ProteoCachePropertyHelperManager.getPropertyHelper();
  25
  26         /**
  27          * @see ServletContextListener#contextInitialized(ServletContextEvent)
  28          */
  29         public void contextInitialized(ServletContextEvent arg0) {
  30                 System.out.println("ProteoCache session start......");
  31                 db.Connect();
  32
  33                 webjob_scheduler = Executors.newSingleThreadScheduledExecutor();
  34                 webjob_scheduler.scheduleAtFixedRate(new Runnable() {
  35                         @Override
  36                         public void run() {
  37                                 try {
  38                                         db.Parsing();
  39                                 } catch (IOException e) {
  40                                         // TODO Auto-generated catch block
  41                                         e.printStackTrace();
  42                                 }
  43                         }
  44                 }, 0, 600, TimeUnit.SECONDS);
  45
  46         }
  47
  48         /**
  49          * @see ServletContextListener#contextDestroyed(ServletContextEvent)
  50          */
  51         public void contextDestroyed(ServletContextEvent arg0) {
  52                 db.Closing();
  53                 System.out.println("Shut down ProteoCache......");
  54                 webjob_scheduler.shutdownNow();
  55         }
  56
  57 }