[Zope-dev] Fw: [Zope-dev] Storing session objects in a ZODB

Wed, 31 Jan 2001 11:47:39 -0800

Well my quick hack and wacky of doing it is as follows:

- I wrote a quick simple class "ZStore" that has as one of its properties a
pickle, which you can read and write to using cStringIO
- I make a ZStore object, throw in the session object, it pickles it as the
data property, I add a few more useful properties, like title, owner etc...
- To get it back I get that object, unpickle that property and I have the
session back.

Quick hack that works for me and allows me to change the content of a
session object, without having to change the storage. Im sure someone will
come up with a better solution.

--
  Andy McKay.

----- Original Message -----
From: "Chris McDonough" <chrism@digicool.com>
To: <zope-dev@zope.org>
Sent: Wednesday, January 31, 2001 11:28 AM
Subject: [Zope-dev] Fw: [Zope-dev] Storing session objects in a ZODB

> This is a forwarding of an interesting session-related discussion between
> Andy and I... it covers the idea of storing session states as "snapshots"
at
> a particular time, later allowing users to select a session state.  This
is
> useful if you wish to allow users to make incremental changes to data in a
> session and "bookmark" a session state for later copying into the current
> session.  This is something that the "bare" session tracking stuff won't
do
> for you, although it can facilitate it tremendously.
>
> Input welcomed!
>
> - C
>
> ----- Original Message -----
> From: "Andy McKay" <andym@ActiveState.com>
> To: "Chris McDonough" <chrism@digicool.com>
> Sent: Wednesday, January 31, 2001 1:56 PM
> Subject: Re: [Zope-dev] Storing session objects in a ZODB
>
>
> > > I think you may be trying to use sessions to do something that
sessions
> > > don't do.  You can *use* the sessioning machinery as a base to build
the
> > > infrastructure to do such a thing, but it won't do it out of the box.
I
> > am
> > > currently trying to build an "onSessionStart" and "onSessionEnd" event
> > into
> > > session data objects.  If you had this capability, an arbitrary Python
> > > method (or DTML method or external method) could be called when a
> session
> > > data object is created and when it expires.  If you were to make use
of
> > > these hooks to copy the state of the session data object into another
> > > structure (related to the currently logged in user - a "checkpoint" if
> you
> > > will), you could build a catalog of session states that could be
> recopied
> > > into the current session namespace.
> > >
> > > Alternately, you could forego the use of events and just have a button
> > that
> > > says "save session state" somewhere, and copy the contents of the
> session
> > > namespace into something else.  Then when a user wanted to choose a
> > session
> > > state, copy it back into the current session namespace.  This is the
> same
> > > idea, it just lets the user be explicit about what session state he
> wants
> > to
> > > use instead of depending on the event hook to create a new state.
> >
> > Bingo, yes that's it!
> >
> > > Does this make sense?  Can I cc this to Zope-Dev so we can get some
> > > discussion about it?
> >
> > Absolutely!
> >
> > --
> >   Andy McKay.
> >
> > >
> > >
> > > > ----- Original Message -----
> > > > From: "Chris McDonough" <chrism@digicool.com>
> > > > To: "Andy McKay" <andym@ActiveState.com>
> > > > Sent: Tuesday, January 30, 2001 9:53 AM
> > > > Subject: Re: [Zope-dev] Storing session objects in a ZODB
> > > >
> > > >
> > > > > Andy,
> > > > >
> > > > > I'm still not sure why you wouldn't set up an external data
> > container..
> > > if
> > > > > you want, you can call me at 540-371-6909 if you think you can
> explain
> > > it
> > > > > better over the phone...
> > > > >
> > > > > - C
> > > > >
> > > > >
> > > > >
> > > > > ----- Original Message -----
> > > > > From: "Andy McKay" <andym@ActiveState.com>
> > > > > To: "Chris McDonough" <chrism@digicool.com>
> > > > > Sent: Tuesday, January 30, 2001 12:28 PM
> > > > > Subject: Re: [Zope-dev] Storing session objects in a ZODB
> > > > >
> > > > >
> > > > > > Well each user rummages through a site and saves preferences, I
> use
> > > > these
> > > > > > preferences for displaying things in a certain manner,
generating
> > SQL
> > > > etc.
> > > > > > Since some of these SQL statements get quite complex, it would
be
> > nice
> > > > to
> > > > > be
> > > > > > to able to pull saved session x which has a query that "looks up
> by
> > x
> > > by
> > > > y
> > > > > > excluding z" etc...
> > > > > >
> > > > > > So anyway I like using the ZODB for this kind of storage since
> it's
> > of
> > > > low
> > > > > > volume and a large amount of reads and the users want to use
> > > acquisition
> > > > > to
> > > > > > the full (we have a wacky hierarchy). If I could pull that into
a
> > text
> > > > > area
> > > > > > to allow level editing then that would be an added bonus...
> > > > > >
> > > > > > Did that make sense?
> > > > > > --
> > > > > >   Andy McKay.
> > > > > >
> > > > > >
> > > > > > ----- Original Message -----
> > > > > > From: "Chris McDonough" <chrism@digicool.com>
> > > > > > To: "Andy McKay" <andym@ActiveState.com>
> > > > > > Sent: Monday, January 29, 2001 5:49 PM
> > > > > > Subject: Re: [Zope-dev] Storing session objects in a ZODB
> > > > > >
> > > > > >
> > > > > > > > Sure but users want to be able acess and manipulate the
stored
> > > > session
> > > > > > > > objects, without them being loaded... Im going for a bike
ride
> > to
> > > > > think
> > > > > > > > about this one.
> > > > > > >
> > > > > > > Erm.  What?  :-)  Can you give me an example?
> > > > > > >
> > > > > > >
> > > > > >
> > > > > >
> > > > >
> > > >
> > > >
> > >
> >
> >
>
>
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