java - Spring boot and Hibernate Transaction not working as desired -


i have spring boot application hibernate on mysql, , need use pessimistic locking logic services.

i have scheduled job should update objects, happens following iteration doesn't take previous account, want put pessimistic logic service.

so, scheduled task

@scheduled(fixeddelay=3000, initialdelay=5000) public void checkswitchtoshutdown(){      // logger.debug("scheduled partito :"+ dateformat.format(new date()));     list<interruttore> interruttori = interruttoreservice.findallswitches();      (int = 0; < interruttori.size(); i++){         interruttore interruttore = interruttori.get(i);          interruttoreservice.toggleswitchnew(interruttore);     }    }

interruttoreservice.toggleswitchnew on concrete implementation of service layer. implementation annotated @transactional

the service method is:

@override @transactional(isolation = isolation.serializable, readonly = false) public void toggleswitchnew(interruttore interruttore) {     date nexttimeout = interruttore.gettimeoutdate();     date date = new date();     date = new timestamp(date.gettime());      if (nexttimeout == null) {         nexttimeout = now;     }      boolean on = interruttore.isstato();     string pinname = interruttore.getpinname();      if ((now.after(nexttimeout) && on) || (!on && nexttimeout.after(now))) {         try {             logger.debug("status @ beginning " + on);             interruttore.setdatetime(now);             interruttore.setstato(!on);             updateinterruttore(interruttore);             logger.debug("updated status " + interruttore.isstato());             gpiopindigitaloutput relepin = interruttore.getgpio()                                  .provisiondigitaloutputpin(raspipin.getpinbyname(pinname));             relepin.high();              try {                 thread.sleep(300);              } catch (interruptedexception e) {                 logger.error("errore sleep ", e);             }              relepin.low();             interruttore.getgpio().unprovisionpin(relepin);          } catch (gpiopinexistsexception ge) {             logger.error("gpio già esistente");          } catch (throwable t) {             logger.error("pessimistic", t);         }      } }

updateinterruttore is

@override @transactional(readonly = false, isolation = isolation.serializable) public void updateinterruttore(interruttore interruttore) {     try {         interruttore entity = dao.findbyid(interruttore.getidinterruttore());          if (entity != null) {             entity.setstato(interruttore.isstato());             entity.setdatetime(interruttore.getdatetime());             entity.settimeoutdate(interruttore.gettimeoutdate());         }      } catch (throwable t) {         logger.debug("error: ",t);     } }

now happens 2 consecutive steps of scheduled task go toggleswitchnew , if first has changed status of switch true, second value false, transaction not being locked...

for instance log of happens:

2016-11-08 13:03:03 debug interruttoreserviceimpl:173 [pool-2-thread-1] - status @ beginning false 2016-11-08 13:03:03 debug interruttoreserviceimpl:177 [pool-2-thread-1] - updated status true 2016-11-08 13:03:03 debug interruttoreserviceimpl:183 [pool-2-thread-1] - l'interruttore si deve accendere: zona -4b 2016-11-08 13:03:07 debug interruttoreserviceimpl:173 [pool-2-thread-1] - status @ beginning false 2016-11-08 13:03:07 debug interruttoreserviceimpl:177 [pool-2-thread-1] - updated status true 2016-11-08 13:03:07 debug interruttoreserviceimpl:183 [pool-2-thread-1] - l'interruttore si deve accendere: zona -4b


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