Using Cache

Hi,
I have a question on how to use caching/retrieve cached objects thru java programs. Right now in my descriptor,
I'm using "oracle.toplink.internal.identitymaps.SoftCacheWeakIdentityMap". How does it offer caching? Is this the best option? Please show me how can I retrieve cached objects programmatically. Also point me to appropriate location of Toplink documentation and examples. I need to know about this caching thoroughly. Any help to resolve these issues is greatly appreciated.
Thanks..

Check the index of the TopLink Java Foundation Library Guide. The trick is that 'cache' is more of a marketing term and you'll find more info by looking for "Identity Map".
- Don

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[Repost] Kodo do not use cache when resolving references to objects?

Abe,
I noticed that if object A references object B and we read multiple A
object which reference the same B object, this B object will be re-read
from database for every fetched A object. If I read 100 A-object
referencing the same B it will do 100 selects on the same B. I use
optimistic transactions with retain values = true
Could you please comment on it
Thank you very much
Alex

Was there something else about this you'd like me to comment on?_
No Abe that is it. I was not sure I am not doing something wrong. I
seemed very strange to me that internal reference resolution completely
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I think it is quite important - you want believe how much it slows down
object graph retrieval. It does not seem to be hard to implement. :-)_
I guess when resolving a reference you would have to use the same
validate _true/false settings as for retrieving object?
-----Original Message-----
From: White, Abe [mailto:[email protected]]
Sent: Monday, August 06, 2001 6:10 PM
To: JDO-ListServ
Subject: RE: [Repost] Kodo do not use cache when resolving references to
objects?
this B object will be re-read_
from database for every fetched A object_Yes, this seems like inefficient behavior that we should optimize. The
same B instance is returned from each relation, so it is not a bug, but
obviously it is something we could be doing a little more intelligently.
Thanks for pointing it out!
Was there something else about this you'd like me to comment on?_

Kodo do not use cache when resolving references to objects?

I noticed that if object A references object B and we read multiple A
object which reference the same B object, this B object will be re-read
from database for every fetched A object. If I read 100 A-object
referencing the same B it will do 100 selects on the same B
Alex

Was there something else about this you'd like me to comment on?_
No Abe that is it. I was not sure I am not doing something wrong. I
seemed very strange to me that internal reference resolution completely
ignore cache.
I think it is quite important - you want believe how much it slows down
object graph retrieval. It does not seem to be hard to implement. :-)_
I guess when resolving a reference you would have to use the same
validate _true/false settings as for retrieving object?
-----Original Message-----
From: White, Abe [mailto:[email protected]]
Sent: Monday, August 06, 2001 6:10 PM
To: JDO-ListServ
Subject: RE: [Repost] Kodo do not use cache when resolving references to
objects?
this B object will be re-read_
from database for every fetched A object_Yes, this seems like inefficient behavior that we should optimize. The
same B instance is returned from each relation, so it is not a bug, but
obviously it is something we could be doing a little more intelligently.
Thanks for pointing it out!
Was there something else about this you'd like me to comment on?_

Why not use cache cleaners

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TTTTTTTTTTTTTTTTTTT wrote:
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