RE: [Informa-developer] Hibernate lazy initialization exception

[Marco M. <mmi...@wa...>]

Hello,
	Sorry for late relpy..
I have currently 240 items in my database.... I am using Informa-0.6.0
With MySql 4.1.1alpha


I am using Hibernate PersistenceManager and poller to insert data
Into the database.

I have however written another standalone program to insert items
Into my database.

Below is the standalone code that I was using...(don't bother about the
creation
Of channel groups etc ,I did it only once and then I was retrieving
channels
From existing groups..

Here is a piece of code..

PersistenceManagerIF manager = new
de.nava.informa.utils.manager.hibernate.PersistenceManager();
		ChannelGroupIF myGroup = manager.getGroups()[0];
                URL url = new
URL("http://online.wsj.com/xml/rss/0,,3_7014,00.xml");
		ChannelIF newChannel = manager.createChannel("US
Business", url);	
manager.addChannelToGroup(newChannel, myGroup);

java.util.Collection items = newChannel.getItems();
		
		Object[] itemArray = items.toArray();
		java.util.Arrays.sort(itemArray, new
ItemComparator(true));
		System.out.println("Getting news from Channel:" +
channel.getTitle());
		for(int i=0; i < itemArray.length; i++) {
			ItemIF item = (ItemIF)itemArray[i];
	
System.out.println("------------------------------------");
			System.out.println("Title:" + item.getTitle());
	
System.out.println("------------------------------------");
			manager.createItem(newChannel,item);
		}


let me know if this code works in your webapp....


regards
	marco



-----Original Message-----
From: inf...@li...
[mailto:inf...@li...] On Behalf Of Nick
Goupinets
Sent: 07 February 2005 17:20
To: inf...@li...
Subject: [Informa-developer] Hibernate lazy initialization exception

Hi everybody,

I run into a problem which I seem to be unable to solve on my own. I am 
trying to implement news system for a Cocoon based portal. I created a 
new cocoon component that uses Informa's persistence manager for the 
CRUD operations on channels / news item. I use a single "global" group 
for keeping track of all the channels on the system.

So far everything was going on nicely until I got into some basic stress

testing. It looks like there are no troubles if a channel contains 
[0..2] news items (Item class). As long as there are 3+ items, 
PersistenceManager gives the following error on initialization:

net.sf.hibernate.LazyInitializationException: Failed to lazily 
initialize a collection
	at 
net.sf.hibernate.collection.PersistentCollection.initialize(PersistentCo
llection.java:201)
	at 
net.sf.hibernate.collection.PersistentCollection.read(PersistentCollecti
on.java:71)
	at net.sf.hibernate.collection.Set.toArray(Set.java:146)
	at 
de.nava.informa.utils.manager.hibernate.NonCachingPersistenceManager.ini
tGroupCollections(NonCachingPersistenceManager.java:525)
	at 
de.nava.informa.utils.manager.hibernate.NonCachingPersistenceManager.get
Groups(NonCachingPersistenceManager.java:506)
	at 
de.nava.informa.utils.manager.hibernate.NonCachingPersistenceManager.get
Groups(NonCachingPersistenceManager.java:172)
	at 
de.nava.informa.utils.manager.hibernate.PersistenceManager.getGroups(Per
sistenceManager.java:122)
	at 
ca.test.components.impl.ChannelManagerImpl.initialize(ChannelManagerImpl
.java:451)

Has anyone experienced this problem before? Any help is appreciated. I 
have the following setup:
Windows XP SP2
Tomcat 5.0.19
Cocoon 2.1.5.1
Informa 0.6.0
Hibernate 2.1.7c
MySQL 4.1.7

Thank you very much for your time.

Sincerely,
Nick.