code: public void activate()
      {
          String pidFile = System.getProperty("cassandra-pidfile");
  
          try
          {
              try
              {
                  MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
                  mbs.registerMBean(new StandardMBean(new NativeAccess(), NativeAccessMBean.class), new ObjectName(MBEAN_NAME));
              }
              catch (Exception e)
              {
                  logger.error("error registering MBean {}", MBEAN_NAME, e);
                  //Allow the server to start even if the bean can't be registered
              }
              
              setup();
  
              if (pidFile != null)
              {
                  new File(pidFile).deleteOnExit();
              }
  
              if (System.getProperty("cassandra-foreground") == null)
              {
                  System.out.close();
                  System.err.close();
              }
  
              start();
          }
          catch (Throwable e)
          {
              logger.error("Exception encountered during startup", e);
  
              // try to warn user on stdout too, if we haven't already detached
              e.printStackTrace();
              System.out.println("Exception encountered during startup: " + e.getMessage());
  
              System.exit(3);
          }
      }
docs: A convenience method to initialize and start the daemon in one shot.