@Override
protected IStatus run(IProgressMonitor monitor) {

  while (isTerminated() == false) {

    try {
      if (thread.isSuspended() == true) {
        System.out.println("program suspended");
        if(sleep() == true) { // wait for someone to wake me up
          System.out.println("job is sleeping");                            
        } else {
          System.out.println("cannot sleep");
        }            
      } else {
        thread.resume();
      }
    } catch (DebugException e) {
      e.printStackTrace();
    } 

  }
  return Status.OK_STATUS;      
} 

program suspended
cannot sleep
<repeat to infinity>