The answer is to have a component that IS session-aware. It keeps
all the access of the session scope to one CFC and allows all the
other cfcs that require information from the session scope to have
that injected in by Coldspring. It's called a facade. It separates
the other cfcs from the session scope. They dont know about the
session scope, dont need to know and dont care. All they know is that
the information they require is provided when it's required. The
same would also apply to any other scope too.
Here's what's in my UserService.cfc:
<cfcomponent displayname="UserService" output="no" hint="Service
facade for the User functions">
<cffunction name="getUser" access="public"
returntype="cfcs.Users.user" output="false" hint="Collects the current
user's user bean from the session scope and returns it">
<cfreturn session.user />
</cffunction>
</cfcomponent>
This is the only CFC with knowledge of the session scope. You could
also have methods that access the client scope if you use client
variables or application vars as well if that's relevant to your app.
(altough i pass in application vars with a configbean but that's a
similar concept.).
The Coldspring.xml file has these items in it :
<beans>
<!-- configuration -->
<bean id="configbean" class="cfcs.config.configbean">
<constructor-arg
name="argsConfigXMLname"><value>/cfcs/config/AdminConfig.xml</value></constructor-arg>
</bean>
<bean id="ProductDAO" class="cfcs.Merchandise.ProductDAO">
<constructor-arg name="argsConfiguration"><ref
bean="configbean"/></constructor-arg>
<property name="UserService"><ref bean="UserService"
/></property>
</bean>
</beans>
Then in the various CFCS like for example the products DAO:
<cfcomponent displayname="Products DAO" output="false">
<!--- Constructor --->
<cffunction name="init" access="Public" returntype="MerchProductDAO"
output="false" hint="Initialises the controller">
<cfargument name="argsConfiguration" required="true"
type="cfcs.config.configbean" />
<cfset variables.dsn = arguments.argsConfiguration.getDatasource() />
<cfreturn this />
</cffunction>
<cffunction name="setUserService" access="public" output="false"
returntype="void" hint="Dependency: User Service">
<cfargument name="UserService" type="admin.cfcs.users.UserService"
required="true"/>
<cfset variables.UserService = arguments.UserService/>
</cffunction>
And throughout the DAO whenever a part of the session scope is needed,
you do this .. (for example in the products DAO, the INSERT and UPDATE
methods require the userid of the person causing the action to take
place, for the audit trail) you have the following:
updatedby = <cfqueryparam
value="#variables.userService.getUser().getUserId()#"
cfsqltype="cf_sql_varchar"/>
It seems very convoluted and long-winded at first. But if you just
humour me for a while and go with it, you'll see that eventually the
light comes on and you see what a terrific benefit it is to separate
your CFCs completely from needing to know about anything except what's
told to them when they're instantiated.
In the example I've given, ProductsDAO doesnt know anything about the
session scope. It doesnt need to . IT's got a service injected.
Suppose you have dozens or maybe even hundreds of CFCs scattered
through your site, and your IT architect decides that user
information is now going to be stored in the client scope instead of
the session scope.
What you'd do is quote them for 6 weeks work, on the basis that it's a
major upheaval to the basic infrastructure, spend 5 minutes changing
and testing the facade UserService.cfc, spend a couple of days
playing computer games, read a book, write a personal site, update
the site for your hobby, write your blog, "work at home" for 4 weeks,
and then give them the bill for $15 grand for 6 weeks work.
Cheers
Mike Kear
Windsor, NSW, Australia
Adobe Certified Advanced ColdFusion Developer
AFP Webworks
http://afpwebworks.com
ColdFusion, PHP, ASP, ASP.NET hosting from AUD$15/month
> On Fri, Apr 4, 2008 at 10:59 AM, Ryan J. Heldt <[EMAIL PROTECTED]> wrote:
> > Hey Guys-
> >
> > I'm fairly new to this whole Coldspring business, so I apologize if this
> > is a glaringly obvious question. I have an intranet application that has
> > a AuthenticatedUser CFC that is given to every user that signs in,
> > persisted in the session scope. Is it possible to have Coldspring inject
> > that session-persisted object into another object/bean. Say, for
> > example, I have an object that needs to return information based on the
> > current user.
> >
> > Thanks for your help!
> > Ryan
>
>
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