@POST
  @Produces({MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
  @Path("/start")
  public Response startMemoryMonitor() {
    timeMonitor = null;
    timeMonitor = new Timer();
    TimerTask scanTask =
        new TimerTask() {
          IMemoryDAO mdao = DAOFactory.getInstance().getMemoryDAO();
          MemoryPO memDetails = new MemoryPO();
          DateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm");

          @Override
          public void run() {
            /*Runtime rt=Runtime.getRuntime();
            long freeVMemory = rt.freeMemory()/1024;
            long totalVMemory = rt.totalMemory()/1024;
            long usedVMemory = totalVMemory-freeVMemory;*/

            OperatingSystemMXBean bean =
                (com.sun.management.OperatingSystemMXBean)
                    ManagementFactory.getOperatingSystemMXBean();

            long maxMemory = bean.getTotalPhysicalMemorySize() / 1024;
            long freeVMemory = bean.getFreePhysicalMemorySize() / 1024;

            long usedVMemory = maxMemory - freeVMemory;

            long freeSpace = 0;
            long usedSpace = 0;

            for (java.nio.file.Path root : FileSystems.getDefault().getRootDirectories()) {
              try {
                FileStore store = Files.getFileStore(root);
                freeSpace = store.getUnallocatedSpace() / 1024;
                usedSpace = ((store.getTotalSpace() / 1024) - (store.getUnallocatedSpace() / 1024));
              } catch (FileSystemException e) {
                Log.trace(e.toString());
              } catch (IOException e) {
                Log.trace(e.toString());
              }
            }
            memDetails.setUsedVolatile(usedVMemory);
            memDetails.setRemainingVolatile(freeVMemory);
            memDetails.setUsedPersistent(usedSpace);
            memDetails.setRemainingPersistent(freeSpace);
            Calendar calendar = Calendar.getInstance();
            memDetails.setCreatedAt(df.format(calendar.getTime()));
            mdao.insertMemoryStats(memDetails);
          }
        };
    timeMonitor.schedule(scanTask, 0, 60000);

    return ok();
  }
 @POST
 @Path("/stop")
 public void stopMemoryMonitor() {
   timeMonitor.cancel();
   Log.trace("Memory Monitor Stopped");
 }