Replied to quickly... So, if I use HistoryJar to load a BTree from a given old state, are you sure HistoryJar will correctly load all the BTree subobjects (sub BTrees and Buckets)? I got the impression, reading HistoryJar code, that it might load current state of subobjects, not old states... :(
Pascal -----Message d'origine----- De : [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] De la part de Pascal Peregrina Envoyé : jeudi 13 avril 2006 11:27 À : Dieter Maurer Cc : zodb-dev@zope.org Objet : RE: [ZODB-Dev] Question about BTree transaction data HistoryJar is what I was looking for !! Thanks ! Pascal -----Message d'origine----- De : Dieter Maurer [mailto:[EMAIL PROTECTED] Envoyé : mercredi 12 avril 2006 19:41 À : Pascal Peregrina Cc : zodb-dev@zope.org Objet : RE: [ZODB-Dev] Question about BTree transaction data Pascal Peregrina wrote at 2006-4-12 08:35 +0100: >I use FileStorage (via ZEO). > >I have switched a big dictionary from PersistentMapping to BTree. > >In the past, it was easy to compute added/deleted keys from states (cause >PersistentMapping state contains the whole dictionary, so it was only a matter >of getting the keys and comparing them with previous state keys). What do you mean by "state"? What you get with "obj.__getstate__()"? In this case, you can indeed not compute added/deleted keys alone from the current and a previous state of the tree alone. You must also take into account the state of children... >... So could you give me a little more details about what you mean? (or of course point me to some example/resources on the net) Search the mailing list archive (for "zope@zope.org" or "zope-dev@zope.org") for a post from me about "HistoryJar". This is a speciallized ZODB connection that loads the state of objects as it was at a given time. In this, I do not mean "state" technically as the result of "__getstate__" but as the complete object state. You can use such a "historical" object in the same way as you use a "current" object (apart from not being able to modify it). Especially, you can ask a historical BTrees.XXBTree instance for all its keys and compare this to all the keys of the current object. -- Dieter ********************************************************************** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This footnote also confirms that this email message has been swept by MIMEsweeper for the presence of computer viruses. www.mimesweeper.com ********************************************************************** _______________________________________________ For more information about ZODB, see the ZODB Wiki: http://www.zope.org/Wikis/ZODB/ ZODB-Dev mailing list - ZODB-Dev@zope.org http://mail.zope.org/mailman/listinfo/zodb-dev _______________________________________________ For more information about ZODB, see the ZODB Wiki: http://www.zope.org/Wikis/ZODB/ ZODB-Dev mailing list - ZODB-Dev@zope.org http://mail.zope.org/mailman/listinfo/zodb-dev
