DAO a "stored procedures only" pristup

[Rak Dalibor]

Dobry den,

- zasadne nevyhody:
	- pouzitie cache v entitno relacnych nastrojoch straca vyznam
	- vzdy je potrebne volat rollback po neuspesnej transakcii (ak pouzivate napriklad toplink, update sa pri neuspesnej operacii nemusi volat, 	lebo neboli zavolane updaty :))
	- pracne, a navyse neefektivne udrziavatelne - nutne mapovanie objektov na vysledok volania procky
	- komplikuje migraciu pri prechode na inu DB
- vyhody:
	- ak procedury pouziva aj existujuca cast DB logiky
	- nic ine ma nenapadlo :)

S pozdravom

Dalibor



-----Original Message-----
From: konference-bounces na java.cz [mailto:konference-bounces na java.cz] On Behalf Of Lukas.Kubasek na barclayscapital.com
Sent: Friday, June 05, 2009 10:40 AM
To: konference na java.cz
Subject: DAO a "stored procedures only" pristup

Zdravim,

Rad bych se zeptal na nezavisly nazor. Je ve vasi firme bezne, ze jsou v
Java Enterprise aplikaci (Spring, EJB, cokoliv) vsechny CRUD operace
modelovany pres ulozene procedury v databazi? Nemluvim o komplexnich
operacich, ktere je nutne do storky davat, ale o kazde jednotlive
jednoduche operaci select, update, insert, delete, pricemz z DAO vrstvy
pak jen volate ulozenou proceduru? 

Mate nejake vyrazne plusy ci minusy proc tento pristup
doporucit/zavrhnout?

Diky 

Lukas Kubasek
Barclays Capital, Global IT Services Prague
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