Re: [Resin-interest] Hibernate lazy loading with Quercus

2009-11-24 Thread Michael Rusch 
  Seems that the objects no longer have the association with valid 
session, so either the Session or PersistenceManager should be kept 
around to fill the objects in upon use. Forcing eager load could also be 
used I think.
 
  Alex.

Just noting that this can be done on the configuration level, or you can 
do it using joins when you query for your objects.


  I assume the easiest route here is to use a Filter to achieve
  session/transaction per request.
 
   /Mattias

Along those same lines, you might also want to check out the Open 
Session in View pattern, which is mentioned in a number of places in 
the Hibernate docs:

https://www.hibernate.org/43.html

Michael

 Alex wrote (2009-11-24 06:01):
 Hello,

 we try to do the following on our php/EJB3 application :
 • find a given client from its lastname using a stateless bean ()
 • load his orders using the getter

 [code]
 $clients = $client_eao-findBySample($sample_client,false,false);
 var_dump($clients[0]-getOrders());
 [/code]
 

 Seems that the objects no longer have the association with valid session, so 
 either the Session or PersistenceManager should be kept around to fill the 
 objects in upon use. Forcing eager load could also be used I think.

 Alex.
   
 
 I assume the easiest route here is to use a Filter to achieve 
 session/transaction per request.
 
  /Mattias
 
 We get the usual LazyInitializationException :
 [10:41:03.300] {http--8080-6$31582617} 
 org.hibernate.LazyInitializationException: failed to lazily initialize a 
 collection of role: com.opticneo.entity.client.Client.orders, no session or 
 session was closed

 If we were using Hessian, before returning the list of clients we would 
 have made a copy of the list (using beanlib) before it is serialized (in 
 ordre to avoid LazyInitializationException)
 With Quercus, we do not have to do this. Good ! But we face the 
 LazyInitializationException again when trying to access the complex 
 attributes.

 What is the best way to handle this ? (maybe by taking control over the 
 transaction from the php)

 Thanks for your help.

 Regards

 -- 
 Vincent LAUGIER 
 
 
 
 
 
 
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[Resin-interest] Hibernate lazy loading with Quercus

2009-11-23 Thread Vincent LAUGIER 
Title: Vincent LAUGIER




Hello,

we try to do the following on our php/EJB3 application :

  find a given client from its lastname using a stateless bean ()
  
  load his orders using the getter


[code]
$clients = $client_eao-findBySample($sample_client,false,false);
var_dump($clients[0]-getOrders());
[/code]

We get the usual LazyInitializationException :
[10:41:03.300] {http--8080-6$31582617}
org.hibernate.LazyInitializationException: failed to lazily initialize
a collection of role: com.opticneo.entity.client.Client.orders, no
session or session was closed

If we were using Hessian, before returning the list of clients we would
have made a copy of the list (using beanlib) before it is serialized
(in ordre to avoid LazyInitializationException)
With Quercus, we do not have to do this. Good ! But we face the
LazyInitializationException again when trying to access the complex
attributes.

What is the best way to handle this ? (maybe by taking control over the
transaction from the php)

Thanks for your help.

Regards

-- 




  

   Vincent LAUGIER 
Email : vincent.laug...@helmet.fr
Tlphone : + 33 (0)1 75 43 92 52
Fax : + 33 (0)1 79 75 01 12 (monfax.com)
  


  




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Re: [Resin-interest] Hibernate lazy loading with Quercus

2009-11-23 Thread Alex 
 Hello,
 
 we try to do the following on our php/EJB3 application :
   • find a given client from its lastname using a stateless bean ()
   • load his orders using the getter
 
 [code]
 $clients = $client_eao-findBySample($sample_client,false,false);
 var_dump($clients[0]-getOrders());
 [/code]

Seems that the objects no longer have the association with valid session, so 
either the Session or PersistenceManager should be kept around to fill the 
objects in upon use. Forcing eager load could also be used I think.

Alex.
 
 We get the usual LazyInitializationException :
 [10:41:03.300] {http--8080-6$31582617} 
 org.hibernate.LazyInitializationException: failed to lazily initialize a 
 collection of role: com.opticneo.entity.client.Client.orders, no session or 
 session was closed
 
 If we were using Hessian, before returning the list of clients we would have 
 made a copy of the list (using beanlib) before it is serialized (in ordre to 
 avoid LazyInitializationException)
 With Quercus, we do not have to do this. Good ! But we face the 
 LazyInitializationException again when trying to access the complex 
 attributes.
 
 What is the best way to handle this ? (maybe by taking control over the 
 transaction from the php)
 
 Thanks for your help.
 
 Regards
 
 -- 
 Vincent LAUGIER 
 Email : vincent.laug...@helmet.fr
 Téléphone : + 33 (0)1 75 43 92 52
 Fax : + 33 (0)1 79 75 01 12 (monfax.com)
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Re: [Resin-interest] Hibernate lazy loading with Quercus

2009-11-23 Thread Mattias Jiderhamn 

Alex wrote (2009-11-24 06:01):

Hello,

we try to do the following on our php/EJB3 application :
• find a given client from its lastname using a stateless bean ()
• load his orders using the getter

[code]
$clients = $client_eao-findBySample($sample_client,false,false);
var_dump($clients[0]-getOrders());
[/code]



Seems that the objects no longer have the association with valid session, so 
either the Session or PersistenceManager should be kept around to fill the 
objects in upon use. Forcing eager load could also be used I think.

Alex.
  


I assume the easiest route here is to use a Filter to achieve 
session/transaction per request.


/Mattias


We get the usual LazyInitializationException :
[10:41:03.300] {http--8080-6$31582617} 
org.hibernate.LazyInitializationException: failed to lazily initialize a 
collection of role: com.opticneo.entity.client.Client.orders, no session or 
session was closed

If we were using Hessian, before returning the list of clients we would have 
made a copy of the list (using beanlib) before it is serialized (in ordre to 
avoid LazyInitializationException)
With Quercus, we do not have to do this. Good ! But we face the 
LazyInitializationException again when trying to access the complex attributes.

What is the best way to handle this ? (maybe by taking control over the 
transaction from the php)

Thanks for your help.

Regards

--
Vincent LAUGIER 




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