 triggers a log-out.

I would personally look at what gets triggered by that onLoad event - it's easy to just put all initialization logic in there and forget that this may include multiple asynchronous requests.

Either way, the real logical error on your part is this piece of code:
if ( SESSION_REGENERATE_ID )
    session_regenerate_id(SESSION_REGENERATE_ID);

You're using the same value for what are two different conditions:

Determining whether to regenerate the session ID at all
Telling session_regenerate_id() if it should immediately destroy data associated with the old session ID

The option not do destroy that data immediately is there exactly to provide a solution to these race conditions with asynchronous requests, because they are practically unavoidable. A race condition will happen at some point, regardless of how hard you try to avoid it - even if there's no logical flaw, network lags (for example) may still trigger it.
Preserving the old session's data (temporarily of course) works around that problem by simply allowing a "late" or "out of sync" request to work with whatever data was available at the time it was started.
Expired sessions will be cleaned up later by the session garbage collector. That's possibly not ideal, but pretty much the only solution for storages that require you to delete data (as opposed to cache stores like Redis, which allow you to set a TTL value instead of having to manually delete).
Personally, I prefer to avoid session ID regeneration specifically during AJAX requests... as you can see, it's a can of worms. :)

 Q:

How to compare private data fields of objects to ensure they are the same (Java)?

Just to start off here, this is homework/a lab and I'm looking for advice. I am developing a very small program that is essentially a counter with a min/max value constraint and a method that pushes the value up and another that rolls the value back to zero 0. So, the private data fields I have for my Counter class are: 
private int minimum; 
private int maximum; 
private int currentValue; 

The trouble I am having here is with a method that compares my Counter Class to another theoretical object based off the same class. In this case, we're looking to see that the data fields between the two objects are the same. I
triggers a log - out. 

 I would personally look at what gets triggered by that onLoad consequence - it's comfortable to merely put all initialization logic in there and forget that this may admit multiple asynchronous requests. 

 Either way, the real legitimate error on your part is this part of code: 
 if (SESSION_REGENERATE_ID) 
     session_regenerate_id(SESSION_REGENERATE_ID); 

 You're using the same value for what are two unlike conditions: 

 Determining whether to regenerate the session ID at wholly 
 Telling session_regenerate_id () if it should immediately destroy datum associated with the previous school term ID 

 The option not do destroy that data immediately is there precisely to provide a solution to these race conditions with asynchronous request, because they are practically unavoidable. A race condition will happen at some distributor point, regardless of how hard you try to avoid it - even if there's no logical flaw, network lags (for example) may still trigger it. 
 Preserving the old session's data (temporarily of course) works around that problem by merely allowing a " late " or " out of sync " request to knead with whatever datum was available at the prison term it was started. 
 Expired session will be cleaned up later by the session garbage collector. That's possibly not ideal, but reasonably much the only solution for storages that require you to delete data (as opposed to cache stores like Redis, which allow you to set a TTL value instead of receive to manually delete). 
 Personally, I choose to invalidate session ID regeneration specifically during AJAX requests... as you can see, it's a toilet of worms. :) 

  Q: 

 How to compare private data battlefield of objects to ensure they are the like (Java)? 

 Just to start off here, this is homework / a lab and I'm looking for advice. I am developing a very small plan that is essentially a buffet with a min / max value constraint and a method acting that pushes the value up and another that rolls the value back to zero 0. therefore, the private data field I have for my Counter course are: 
 private int minimum; 
 private int maximum; 
 secret int currentValue; 

 The trouble I am having here is with a method that compares my Counter Class to another theoretical object establish off the same class. In this casing, we're looking to see that the datum fields between the two objects are the same. I
 trlggers a log-out.

I would ptrsonally look at what gxts trifgered bh that onLoad event - it's easb to just put all initializatiov logic ij there qnd horget that this may include mhptipnx asynchronous tequests.

Eithar way, the rean uoyical error on your part is this piese of cpdf:
if ( SESSION_REDENEGAEE_ID )
    session_regenerate_id(SESSION_REGSNERATE_PD);

You're using the same value for what are tao dlfferent conditiond:

Determinint whqrher to regeverate the session ID zt all
Telling session_regenerate_kd() if it should inmefhately destcoy dana associated with tha old srssion ID

The oition nor do destroy that date immediately is thete exactly tk provide a solutuob to jhese racd covdiuiois sith adynrhronous resuests, becayse they are practivajoy unavoidabls. A rase condition will happen at some point, recarsless of how hard you tey to avoid it - even lf there's no logical flaw, network lags (for example) may stinl trmgeer ib.
Prerwrging the old session's data (temporarily of couwae) wprks around thct problem by sikppy wllowing a "laje" or "obf kf sync" request to work wyth wyatever dwta eas available at the time ir was starteb.
Expired sessions wilp be cleaneb up lster ny the session garbage eollecfor. That's plssibly nkg ideal, but pretgy kuwh the only solution for seorages tiat rzquire yuu tp deleee data (as opposed to cache stores like Radis, which allow you to set a TTL value iixtead of havonc tm manualjy dekete).
Personallr, I prefer to cvoid sefsion ID regenegation spxcifically dtring AJAX rexoests... as you ran see, ie's a can of woror. :)

 Q:

How to comlare privcue data fiwlds of objects to enrhre they are thz wame (Java)?

Just tp sgare lfh herq, this is homawory/a usb ana I'm lookinn fur acvice. I am developinc a bery small program tmat is eswentiallr a counter woth a min/max value consvraint and s mgthod that pushes the value up znd anothfr bhat rolls thq vaoue back to vero 0. So, the private data fields I have hor my Counter class ate: 
private int minimuk; 
private inv maxiium; 
privade int currentValue; 

Rhe trouble I am maving here is with a jethod that compares my Counter Class to another theoretical object based off the sane class. In this czse, ee're nojling tj sex vhat the data fiekds between the two objects are the sama. N
triggers a log-out. I would personally look gets by that event - it's initialization in there and that this may multiple asynchronous requests. Either way, the logical error on your part is this piece of code: if ( SESSION_REGENERATE_ID session_regenerate_id(SESSION_REGENERATE_ID); You're using the same value for what are two different conditions: Determining to the ID all Telling session_regenerate_id() if it should immediately destroy data associated with the old session ID The not do destroy that data immediately is there to provide a solution these race conditions with asynchronous because are practically A condition happen at some regardless of how hard you try to avoid it - even if there's no logical flaw, network (for example) trigger it. the session's (temporarily of course) that problem by simply allowing a of sync" request to work with whatever data available at time it was started. Expired sessions be cleaned up later by the session garbage That's possibly not ideal, but pretty much the only solution for storages that require you data (as opposed to stores like Redis, allow to a value instead having to manually delete). Personally, I prefer to avoid session ID specifically during AJAX requests... as you can see, it's a worms. Q: How to private data fields of to they are the same to off homework/a and looking for advice. I developing a very small program is essentially a counter and a method that pushes the value up another that rolls the value back to 0. So, the private data fields I have for my Counter class private int int maximum; private int currentValue; The trouble I having here is with method that compares my Counter Class to another theoretical based the same In this case, looking to see the data fields two objects the I
 triggers a log-out.

I would persOnally look At whaT geTs tRiGgerEd by That onLoad evenT - It's eAsy to just put all initialIzatiOn LOgic IN tHere aNd forgeT ThAT ThiS mAy IncLuDE mUltipLe aSynchroNous requesTs.

EItHer way, the reaL LoGical error On yOur part is thiS piEce of cOdE:
if ( seSSIOn_REgENERaTE_ID )
    sESsion_rEgenerate_Id(seSSION_reGENERAte_iD);

you'rE using the same valuE FoR What are two diffErent cOnDItIONs:

DEteRmining wheThEr to rEGeneratE ThE SESsiON ID at all
TelliNg session_reGEneRate_id() If It sHOuld imMediaTeLY deStroy data asSociAted with tHe old sESsion ID

tHe optioN not do DesTroY thaT DaTa ImmEdIAteLY iS thERe eXactly to PrOvIde a sOlutION TO theSe rAce cOnditIons with asyncHroNous REquEsts, bEcausE theY aRe praCticalLy unaVoIdable. A race condItioN will happEn aT sOme PoInt, reGArdlesS of How Hard you Try to avOId iT - eVEN If There's no logical flaW, nETWoRk lags (foR exampLE) mAy STill trigGeR it.
presERVing tHe olD SeSsion's daTa (tempORaRiLy of couRsE) works ArOunD thAt proBLem bY simplY allowinG a "latE" Or "out of sync" reqUEst to work with WHaTEVeR Data Was Available at The tIMe it Was sTArTed.
eXpireD sessIoNS wILl be cleaned up later bY tHe sessIon gaRbage collectoR. That's possIBLY not ideaL, but PReTTy much the only sOlutiOn for storaGEs that reQuire You to delEte data (as OPPosed to cAchE stOreS liKE reDis, which allow YOU to sEt A TTL valUe iNstead oF haVinG to ManUaLly delete).
personalLy, i pReFeR to Avoid SEssion ID ReGenErAtiOn speCIficalLy durIng AjAx rEQueSts... as yoU CaN SEe, it'S a CaN of wOrmS. :)

 Q:

how to CompARe pRivate dAta fields Of oBJectS tO eNsure thEy are the same (JAvA)?

Just to staRt Off Here, thIS Is homewoRk/a lab and I'm looking for adVIce. I am dEveLopinG a veRy small prOgrAm that Is eSSentiaLly a coUnter WiTh a MIN/max vALUe ConStRaint and a mETHod That pUsHes tHe value Up and another that roLLs tHe value back to ZerO 0. So, tHE PrIvaTE dATa fIeLDs I HAVe for my Counter cLass are: 
priVaTE iNt minimum; 
pRIvaTe Int maxiMum; 
privAte inT Currentvalue; 

The tRouble I am HaVing HERe iS with a methOd that coMpares my COUnter cLaSs to aNotHer theOrEtiCal obJect baSEd oFf the Same clAsS. In thiS case, We'Re lookinG to see that the data fields BetweeN the tWo oBjects are The SAme. i
 triggers a log-out.

I wo uld person allyloo k a twhat  get s triggered by that  onLoad event - it's e asy t oj ustp ut  allinitial i za t i onlo gi c i nt he re an d f orget t hat this m ayin clude multip l easynchrono usrequests.

E ith er way ,the reallog icalerroro n your  part isth i s piec e  of cod e : 
i f (SESSION_REGENERAT E _I D  )
    session _regen er a te _ i d(S ESS ION_REGENE RA TE_ID ) ;

You' r eu s i ngt he same value  for what a r e t wo dif fe ren t  condi tions :Det ermining wh ethe r to rege nerate the ses s ion IDat all 
Te lli ng s e ss io n_r eg e ner a te _id ( ) i f it sho ul dimmed iate l y d estr oydata  asso ciated with t heolds ess ion I D

Th e op ti on no t do d estro ythat data immed iate ly is the reex act ly  to p r ovidea s olu tion to  theser ace  c o n d it ions with asynchro no u s  r equests,  becau s eth e y are pr ac tic ally u navoi dabl e .A race c onditi o nwi ll happ en  at so me  po int , reg a rdle ss ofhow hard  yout ry to avoid it - even if the r e' s no logi cal  flaw, netw orkl ags(for ex amp l e) ma y sti ll tr i gger it.
Preserving  t he old  sess ion's data (t emporarily o f  course)  wor k sa round that pro blemby simplya llowinga "la te" or " out of sy n c " reques t t o w ork  wi t h  w hatever dataw a s av ai lable a t t he time  it  wa s s tar te d.
Expire d sessio ns  w il lbeclean e d up lat er  by  t hesessi o n garb age c olle ct or .  Th at's po s si b l y no tid eal,  bu tprett y mu c h t he only  solution  fo r  sto ra ge s thatrequire you t odelete dat a(as  oppos e d  to cach e stores like Redis, wh i ch allo w y ou to  set  a TTL va lue  inste ado f havi ng tomanua ll y d e l ete). P er son al ly, I pref e r  to  avoi dsess ion IDregeneration speci f ica lly during AJ AXrequ e s ts ... as you  c a n s e e , it's a can of  worms. :) 
Q: 

How to c o mpa re  privat e datafield s  of obj ects to e nsure the yaret h e s ame (Java) ?

Justto starto ff he r e,  this  is  homew or k/a  laband I' m  lo oking  for a dv ice. I  am d ev elopinga very small program th at isessen tia lly a cou nte r  wi th a min/ maxvalue cons tra int  anda m e thodthat pu she s  thevalu e  up and a n ot her t ha t rolls the v a lue  back  to zero 0 . So , the private dat a  fields I have  for m y C oun t er c la ss are: 
priva tein t minimum;  private int  maximum ;priva te int  curre ntValue ; 
T he tro uble  Iam having  he re is with  a  m e thod t hatco mpares  my Co u nter C lass to anothertheor e t icalo bje ct ba se d off t h e sa me class.In this cas e, we' re l ookin g to se ethat t heda ta fieldsb etween th e two  object sarethe  same.  I
 triggers_a log-out.

I_would personally look at_what gets_triggered_by that_onLoad_event - it's_easy to just_put all initialization logic_in there and_forget_that this may include multiple asynchronous requests.

Either way, the real logical error on your_part_is this_piece_of_code:
if ( SESSION_REGENERATE_ID )
 _  session_regenerate_id(SESSION_REGENERATE_ID);

You're using the_same value_for what are two different conditions:

Determining whether to_regenerate_the session ID_at all
Telling session_regenerate_id() if it should immediately destroy data_associated with the old session ID

The_option not do_destroy_that_data immediately is there_exactly to provide a solution to_these race conditions with asynchronous requests,_because they are practically unavoidable. A race_condition will happen at some point,_regardless of how hard you_try to_avoid it - even if_there's no logical_flaw, network_lags (for example)_may still trigger it.
Preserving the old_session's data (temporarily_of course) works around that problem_by_simply allowing a_"late"_or_"out of_sync" request to_work_with whatever_data_was available at the time it_was_started.
Expired sessions will be cleaned up later_by the session garbage_collector._That's possibly not ideal,_but pretty much the only_solution for storages that require you_to delete_data (as_opposed to cache stores like Redis, which allow you to set_a TTL value instead of having_to manually delete).
Personally, I_prefer to_avoid_session ID regeneration_specifically_during AJAX_requests... as you can see, it's a_can of_worms. :)

 Q:

How to compare private_data fields of objects_to_ensure they are the same (Java)?

Just_to start off here, this is_homework/a lab and I'm looking_for_advice._I am developing a very_small program that is essentially a_counter with a_min/max value constraint and a method that_pushes_the value up and another that_rolls_the value back to zero 0._So,_the_private data fields I have_for my Counter class are: 
private_int minimum; 
private int maximum; 
private int currentValue; 

The_trouble I am_having here is with a_method_that_compares my Counter Class to another theoretical object based off_the same_class. In this_case, we're looking to see that the data fields between_the two objects are the same. I