Oh, I'm sorry, the db.update not needed actualy. The history is, then
Castor was young and db.update throw LockNotGrantedException then method
update will changed to this:
/**
* Smart update for JDO object. First the worker load the persistense
object, then copy into it
* values from o, and then commit database. This mechanizm works in
one transaction.
* @param o Object to update
*/
public void update(JDOObject o) {
Database db = null;
JDOObject persistent = null;
try {
db = getDatabase();
db.begin();
// Get persistence object
persistent = (JDOObject)db.load(o.getClass(), getIdentity(o));
// Copy fields to persistense object
jdoObjectCopy(o, persistent);
db.commit();
} catch (Exception ex) {
throw new JDOException("jdo.updateError", new Object[]{o}, ex);
} finally {
closeDatabase(db);
}
}
Just update in transaction. Sure, db.update not used...
I need a some rest, I guess :))
Sorry, again
-----Original Message-----
From: Bruce Snyder [mailto:[EMAIL PROTECTED]
Sent: Tuesday, July 15, 2003 8:03 PM
To: [EMAIL PROTECTED]
Subject: Re: [castor-dev] Long Transactions suggestion
AAE>Would be best if update doing just like this:
AAE>db.begin();
AAE>db.update(o);
AAE>db.commit();
AAE>
AAE>This also may implements by you, but more code needed:
AAE>You must implement method copyObj or somethink like this, also you
AAE>needed method to get identity of object to load previos version.
AAE>
AAE>My resume about problems of long transaction:
AAE>1. I think, and it my private opinion, that providing aditional
AAE>method in OQLQuery interface is not significant, becose it do not
AAE>improve Castor performance as whole, but it maybe make life is
AAE>easiest :)
Making life easier was the reason that this issue arose.
AAE>2. This is requered method, becose otherside implementation of
AAE>copyObj, may be slow or wrong logic, jperation of updating outside
AAE>of transaction object is very important.
I'm not sure I follow the above statement. Please elaborate further.
Bruce
--
perl -e 'print
unpack("u30","<0G)[EMAIL PROTECTED]&5R\"F9E<G)E=\$\!F<FEI+F-O;0\`\`");'
-----------------------------------------------------------
If you wish to unsubscribe from this mailing, send mail to
[EMAIL PROTECTED] with a subject of:
unsubscribe castor-dev
-----------------------------------------------------------
If you wish to unsubscribe from this mailing, send mail to
[EMAIL PROTECTED] with a subject of:
unsubscribe castor-dev
