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EJB3.0 - persist() vs create()  RSS feed

 
Gayatri Ganesh
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hi,

In EJB 3.0 i do not understand the difference between the create() method vs the persist().
When should we use the create() and when should the persist() method be used ?

Thanks,
Gayatri
 
Gustavo Sobral
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persist() method relies on the key entity attribute in order to create or update an existing "record". No duplicate key exception is thrown at object level (before commiting to DB).

create() method always tries to append a new "record" and throws an exception when that key already exists.

You can obtain more accurated info @ http://java.sun.com/javaee/5/docs/tutorial/doc/

Hope it helps you.

Regards,

Gustavo
 
Mike Keith
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Actually there is no create() method in the EJB 3.0 Java Persistence API. It existed in an early version of the spec but was renamed to persist().

-Mike
 
Gayatri Ganesh
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thanks Gustavo & Mike.
 
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