"JAWS tries to write into its table all the data it had in its last
deployment. "
What can I expect JAWS to store somewhere in order to be able to do this?
Where ? Storage requirements ? Optimized, compressed, ... ? How does this
"table loader" work?
By the way, there does not seem to be a package org.jboss.jaws or something
like it.
I can't find any source code that uses the name JAWS?
----------
From: Rickard �berg[SMTP:[EMAIL PROTECTED]]
Sent: jeudi 23 novembre 2000 16:08
To: jBoss
Subject: [jBoss-User] Re: [jBoss-User]
[EMAIL PROTECTED] wrote:
> http://www.jboss.org/documentation/jboss_cmp3.html
>
> "Note that it can be very difficult to change the number or names of
columns
> in the table once there is data in it. jBoss gets very confused by this,
as
> you would expect. When a CMP Bean is re-deployed, JAWS tries to write into
> its table all the data it had in its last deployment. If the table has
> different columns it probably won't be able to do that. This means that it
> is important to get the persistent fields thoroughly correct before
starting
> to put real data into the application."
>
> >>> "as you would expect"
>
> Really?
>
> >>> "JAWS tries to write into its table all the data it had in its last
> deployment."
>
> What is that supposed to mean?
>
> >>> "... to get the persistent fields thoroughly correct ..."
>
> So, we're not supposed to do any maintenance on the application?
>
> Can anybody clarify what this paragraph is supposed to mean?
This means that if you do not provide any additional configuration
metadata the fields will be mapped by name, i.e. CMP field "foo" goes
into database field "foo". So if you change the CMP field "foo" to be
called "bar" instead then JAWS will try to write to the "bar" column in
the database. Now, if you provide a JAWS mapping then you can say that
the CMP field "bar" should point to "foo" table column. That's all...
pretty natural I think..
/Rickard
--
Rickard �berg
Email: [EMAIL PROTECTED]
http://www.telkel.com
http://www.jboss.org
http://www.dreambean.com
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