Thanks for answers!

Do you have dao initialization (if you use dao) in MyService
constructor? Something like this:

  private MyService(){
    someDao = (SomeDao) daoManager.getDao(someDao.class);
  }

Is dao initialization cheap operation too? Should I use singleton,
if I use dao (to create new dao only once)?

-- 
Best regards,
   Dmitri Neverov

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