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klemensl
 Post subject: How to persist more than one object at once?
PostPosted: Thu Dec 14, 2006 7:48 am 
Beginner
Beginner

Joined: Wed Dec 13, 2006 10:39 am
Posts: 26
hello!
is there a possibility to persist more objects at once eg.
session.saveAll(Collection c);?
or do i have to iterate throgh the collection?

Iterator iter = c. iterator();
while (iter.hasNext())
session.save(iter.next());

thx

edit: Hibernate 3.1.3
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dominicus
 Post subject:
PostPosted: Thu Dec 14, 2006 8:06 am 
Regular
Regular

Joined: Thu Aug 17, 2006 4:50 am
Posts: 55
Location: Mallorca
Probably you have considered that ... but just to be sure :

if these objects are associated between them or to another object, you can use the "persistence by reachability" with the cascade options
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klemensl
 Post subject:
PostPosted: Thu Dec 14, 2006 8:34 am 
Beginner
Beginner

Joined: Wed Dec 13, 2006 10:39 am
Posts: 26
thx, yes i know. but i want to persist objects, which are not referenced between each other. eg. i am creating a 10 users an want to persists them. with jdo i could say pm.persistAll/deleteAll(Collection c).
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dominicus
 Post subject:
PostPosted: Thu Dec 14, 2006 9:09 am 
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Regular

Joined: Thu Aug 17, 2006 4:50 am
Posts: 55
Location: Mallorca
I'm afraid that there is not a direct solution :

from the documentation (http://www.hibernate.org/hib_docs/v3/reference/en/html/objectstate.html, section 10.5) :

Quote:
(...) Furthermore, the notion of mass operations conflicts with object/relational mapping for online transaction processing-oriented applications. Future versions of Hibernate may however provide special mass operation functions. See Chapter 13, Batch processing for some possible batch operation tricks.


referenced chapter (http://www.hibernate.org/hib_docs/v3/reference/en/html/batch.html) explains how to prevent out of memory exceptions and increase performance when the set of inserted objects is large enough.
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klemensl
 Post subject:
PostPosted: Wed Dec 20, 2006 10:12 am 
Beginner
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Joined: Wed Dec 13, 2006 10:39 am
Posts: 26
dominicus wrote:
I'm afraid that there is not a direct solution :

from the documentation (http://www.hibernate.org/hib_docs/v3/reference/en/html/objectstate.html, section 10.5) :

Quote:
(...) Furthermore, the notion of mass operations conflicts with object/relational mapping for online transaction processing-oriented applications. Future versions of Hibernate may however provide special mass operation functions. See Chapter 13, Batch processing for some possible batch operation tricks.


referenced chapter (http://www.hibernate.org/hib_docs/v3/reference/en/html/batch.html) explains how to prevent out of memory exceptions and increase performance when the set of inserted objects is large enough.


thx a lot. then i will implement it myself.
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