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1. Re: JBoss 3.2.1 - How do I create an eager-load group with o
raja05 Aug 20, 2003 2:29 PM (in response to kv_moj)I have not done this but can you create a <read-ahead> group with the eager-load-group pointing to a single column in the table(other than the primary key).
so it would be ssomething like
<load-group>
<load-group-name>ABC</load-group-name>
<field-name>Field other than PK</field-name>
</load-group>
<eager-load-group>ABC</eager-load-group>
<read-ahead>
.....
<eager-load-group>ABC</eager-load-group>
</read-ahead>
If you dont have a read-ahead group and you try to load the primary key, all the columns in the table would be loaded but if you do have a read-ahead with a single field, then only those would be loaded, which is closest to what you want.
-Raj -
2. Re: JBoss 3.2.1 - How do I create an eager-load group with o
kv_moj Aug 20, 2003 2:35 PM (in response to kv_moj)Hi,
Thanks for that.
This is how I have it at the moment as it's the closest I can get to what I need.
But I think this is an issue for JBoss dev to look at as there's little logic in loading all the fields when you call a getter for a field that's already loaded.
kv. -
3. Re: JBoss 3.2.1 - How do I create an eager-load group with o
raja05 Aug 20, 2003 2:42 PM (in response to kv_moj)Heres a tweak.
Change your JBossCMP DTD to be
<!ELEMENT load-group (description?, load-group-name, field-name*)>
instead of
<!ELEMENT load-group (description?, load-group-name, field-name+)>
(The * instead of + , so we can even have a load-group with no field-names in it)
If this is the case, there would be no field-names to eager-load when the primary key is loaded.
What do you think?
-Raj -
4. Re: JBoss 3.2.1 - How do I create an eager-load group with o
kv_moj Aug 20, 2003 2:50 PM (in response to kv_moj)Good thinking,
I've already tried this but without tweaking the DTD and of coarse got the validation errors.
I'll try to see if Jboss'll accept an empty load-group after the XML's been parsed.
kv. -
5. Re: JBoss 3.2.1 - How do I create an eager-load group with o
kv_moj Aug 21, 2003 2:54 AM (in response to kv_moj)Yip,
Looks like that's done it.
JBoss will accept an empty load-group after tweaking the DTD.
Also I found that getPrimaryKey() can be called without JBoss loading any fields, but what I needed was this behavior on the primary key abstract getter and this seems to have done the trick.
Thanks for that.