The facade that I was referring to was a scope facade for the session scope. I recently came across a facade pattern from Dave Ross that to me shows serious promise for persistence if you want to create less dependency on the session scope.
http://www.d-ross.org/index.cfm?objectid=0DF6FA41-EB39-B6C1-5D5D31A245991A2F
The article is about Mach-II, but it can seperated and used elsewhere. It is the second article in the three article series.
Teddy
On 10/2/06, Steven Ross <[EMAIL PROTECTED]> wrote:
Yeah same here and where is the info that says a CFC can't access the
client scope?
On 10/2/06, Teddy Payne <[EMAIL PROTECTED]> wrote:
> I am curious as well. The example of not storing being being able to
> effectively store a value or service object is a limitation to be sure, but
> even then that can be worked around with a facade.
>
> Teddy
>
>
> On 10/2/06, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote:
> >
> >
> > Just out of curiosity, why would you say "Don't use the Client scope!"?
> >
> > Thanks,
> >
> > Allen
> >
> >
> > -----Original Message-----
> > From: [EMAIL PROTECTED] [mailto: [EMAIL PROTECTED]]On Behalf Of Jeremy Allen
> > Sent: Saturday, September 30, 2006 12:30 AM
> > To: discussion@acfug.org
> > Subject: Re: Re: [ACFUG Discuss] Client? Session?
> >
> > Don't use the Client scope! There are only a few reasons to use Client
> scope and I would still think long and hard about it after having maintained
> an application that was almost purely Client scope for user state. I think
> you should avoid the client scope unless you have a real and hard
> requirement that you absolutely can't lose session data in the event of a
> server failure. I admit, it is kind of nice to still have all of your user
> sessions when you restart CF and that benefited our applications in some
> cases. However, I still don't think the benefits for Client scope are not
> worth it. Sticky sessions are OK in a load balanced situation. You may get
> some uneven clumping of clients in some cases, but in reality it turns out
> not to be a big deal. Playing with WDDX and the overheads involved in that
> and the pain of keeping track of the serialization state of your data just
> isn't worth it.
> >
> > You can't even serialize a CFC with WDDX, but they will happily live in
> the session scope. If you do use client scope make sure you abstract it with
> a good layer around it so that what scope you use is transparent to your
> application so that you can change it in the future without your application
> noticing. Look to the Facade design pattern for that.
> >
> > Jeremy
> >
> >
> > On 9/27/06, Teddy Payne < [EMAIL PROTECTED]> wrote:
> > > Allen made a good point about WDDX. I tend to overlook CFWDDX.
> > >
> > >
> > > <cfwddx action = "" input = "#session#" output=" client.foo">
> > >
> > > <cfdump var="#client.foo#"> can dump your session into foo variable
> stored into the client scope.
> > >
> > > Your result in the DB would look similar to:
> > > foo=<wddxPacket version#='1.0'><header/><data><struct type#='
> coldfusion.runtime.MemorySessionScope'><var
> name#='cftoken'><string>88107569</string></var><var
> name#='urltoken'><string>CFID#=7101&CFTOKEN#=88107569</string></var><var
> name#='cfid'><string>7101</string></var><var
> name#='sessionid'><string>TESTAPP_7101_88107569</string></var></struct></data></wddxPacket>#
> > >
> > > Teddy
> > >
> > > On 9/27/06, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote:
> > >
> > > >
> > > >
> > > > Just as an aside - you can still store complex structures in client
> variables but you'll have to wddx them into a string and then store them
> into the client variable. Also, if you do this and you have your client
> variables stored in the database, you'll want to make sure your datasource
> is enabled to retrieve BLOB's without the 64k limit.
> > > >
> > > > One other thing, if you're running on MX in JRUN configuration (not
> standalone), you can share the sessions between servers (if I remember
> right). J2EE has clustering built in and I believe it supports the
> equivalent of a session state server.
> > > >
> > > > Allen
> > > >
> > > >
> > > > -----Original Message-----
> > > > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of
> [EMAIL PROTECTED]
> > > > Sent: Wednesday, September 27, 2006 9:22 AM
> > > > To: discussion@acfug.org
> > > > Subject: Re: Re: [ACFUG Discuss] Client? Session?
> > > >
> > > >
> > > > In general it seems to me that the rule is that once a user is on a
> server, they are on the same server. Define complex data. I potentially
> see structures and possibly an occasional object in the shared scope, but
> honestly I don't know yet. We don't officially have any code written.
> > > >
> > > > mcg
> > > >
> > > >
> > > >
> > > >
> > > >
> > > > Steven Ross <[EMAIL PROTECTED]>
> > > > Sent by: [EMAIL PROTECTED]
> > > >
> > > > 09/26/2006 08:04 PM
> > > >
> > > > Please respond to
> > > > discussion@acfug.org
> > > >
> > > >
> > > > [EMAIL PROTECTED]
> > > >
> > > > cc
> > > >
> > > >
> > > > SubjectRe: Re: [ACFUG Discuss] Client? Session?
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > > Yeah it depends on how you want your requests routed... it is my
> > > > understanding that if you want the machines to round robin each
> > > > request then you need to do client variables, if you don't care and
> > > > you just want users to stay on one server then you can use sessions.
> > > >
> > > > On 9/26/06, Teddy Payne <[EMAIL PROTECTED] > wrote:
> > > > > Are you looking to store complex data in your shared scope? If so,
> you need
> > > > > some sort of sticky session solution. If you are looking to store
> simple
> > > > > data, using the datasource option of client variable storeage would
> make it
> > > > > easier to switch over between servers.
> > > > >
> > > > > Teddy
> > > > >
> > > > >
> > > > > On 9/26/06, [EMAIL PROTECTED] <
> > > > > [EMAIL PROTECTED]> wrote:
> > > > > >
> > > > > > I'm a little confused as to what scope of variables to use in our
> > > > > situation. We have a primary server and a 'backup' server in case
> the
> > > > > primary fails. Now that is the current situation. Eventually the
> backup
> > > > > will be replaced with a better machine and the load will be balanced
> a
> > > > > little more evenly. Currently the balancing is done via Resonate
> software
> > > > > (and no one seems to like it). As far as 100% failover, I really
> don't see
> > > > > that as a necessity, these aren't banking applications. Also these
> servers
> > > > > don't talk to each other that I know of.
> > > > > >
> > > > > > TIA
> > > > > >
> > > > > > Mary-Catherine
> > > > > >
> > > > >
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> > > > Steven Ross
> > > > web application & interface developer
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