webservices/compbio/nosql/listeners/ContextListener.java

   1 package combio.listeners;
   2
   3 import java.util.concurrent.Executors;
   4 import java.util.concurrent.ScheduledExecutorService;
   5 import java.util.concurrent.TimeUnit;
   6
   7 import javax.servlet.ServletContextEvent;
   8 import javax.servlet.ServletContextListener;
   9 import javax.servlet.annotation.WebListener;
  10
  11 import combio.cassandra.CassandraCreate;
  12
  13 /**
  14  * Application Lifecycle Listener implementation class ContextListener
  15  *
  16  */
  17 @WebListener
  18 public class ContextListener implements ServletContextListener {
  19         private ScheduledExecutorService scheduler;
  20         CassandraCreate cc = new CassandraCreate();
  21         /**
  22      * @see ServletContextListener#contextInitialized(ServletContextEvent)
  23      */
  24     public void contextInitialized(ServletContextEvent arg0) {
  25         System.out.println("Session start ...........................................");
  26         cc.Connection();
  27
  28
  29         scheduler = Executors.newSingleThreadScheduledExecutor();
  30         scheduler.scheduleAtFixedRate(new Runnable() {
  31             @Override
  32             public void run() { cc.Parsing();}}
  33                         , 0, 30, TimeUnit.SECONDS);
  34     }
  35
  36         /**
  37      * @see ServletContextListener#contextDestroyed(ServletContextEvent)
  38      */
  39     public void contextDestroyed(ServletContextEvent arg0) {
  40         cc.Closing();
  41         System.out.println("Shut down");
  42         scheduler.shutdownNow();
  43     }
  44
  45
  46
  47
  48 }