LightWire and model integration

Communities ColdBox HMVC
1

I have been experimenting (a lot) with LW and auto wirining in my
model and did not get it to work. I saw a couple of threads were
people had the same problem - Injecting dependencies with FW from one
object in to another object in the model. I tried everything
cfproperty, <cfproperty name="User" type="model" scope="instance" />,
and also set up model maping, tried beanFactory: <cfproperty
name="beanFactory" type="coldbox:plugin:beanFactory" />, tested
autowiring Transfer with <cfproperty name="Transfer" type="ocm"
scope="instance"> and GetModel(), but as mentioned in the excellent
documentation this will only work in handlers, plugins etc, as I
understand it - not in the model. I have read everything a couple of
times and now I am rereading it again. Maybe it´s possible with
ColdSpring?

I want to have the advantage of object caching, autowiring and DI
otherwise I could just createObject() where I need it in my object by
composition.

For now I just have skiped the intercommunication between my objects
and instead use autowiring in my handlers and when I need a Transfer
object in one of my bussiness objects I instantiate them with getModel
() and pass in the Transfer objects in the constructor.

I had to re-think and refactor my BO:s but overall they tend to be
more low coupled, encapsulated - more OO-ish, i think is the right
word.

2

Hey Goran, this might help...

http://groups.google.com/group/coldbox/msg/f7c49b0713cbca3e

3

I tried the following in my mode:

Created a BaseModel.cfc

<cfcomponent name="BaseModel" output="false">
  <cfproperty name="dsn" type="coldbox:datasource:myAlias" />
  <cfproperty name="beanFactory" type="coldbox:plugin:beanFactory"
scope="instance" />
<!--- Dependencies injected by COldBox Bean Injector --->
  <cffunction name="getModel" access="public" returntype="any">
  <cfargument name="model" type="any">
   <cfreturn instance.beanFactory.getModel
(argumentCollection=arguments) >
  </cffunction>
</cfcomponent>

And tried to use it in one of my event handler:

<cfset rc.testobj = getPlugin("ioc").getBean("BaseModel").getModel
("linkService") />

Then I got the error:

Element BEANFACTORY is undefined in a Java object of type class
[Ljava.lang.String;

Don´t know why..

4

I thougt it might be something wrong in my app so I created a new app
from the dashboard. Created the nessesary LightWire files and
settings. And tried this:

In your model object you can:

1.) Use cfproperty to inject the setting:

<cfproperty name="htmlBaseURL"
type="coldbox:setting:htmlBaseURL" scope="instance">

<cffunction name="test" access="public" returntype="any">
  <cfset var test = "">
  <cfset test = instance.htmlBaseURL>
  <cfreturn test>
  </cffunction>

And in my event handler:

<cfset rc.testobj = getPlugin("ioc").getBean("BaseModel").test() />

In my view:
<cfoutput>
#rc.testobj#
</cfoutput>

I reinit the framwork and bam:

Application Execution Exception
Error Type: Expression : [N/A]
Error Messages: Element HTMLBASEURL is undefined in INSTANCE.Tag
Context:
ID: ??
LINE: 16
Template: C:\www\minapp\model\BaseModel.cfc
ID: CF_TEMPLATEPROXY
LINE: 76
Template: C:\www\minapp\handlers\general.cfc
ID: CFINVOKE
LINE: 445
Template: C:\www\coldbox\system\controller.cfc
ID: CF_TEMPLATEPROXY
LINE: 163
Template: C:\www\coldbox\system\coldbox.cfc
ID: CF_UDFMETHOD
LINE: 51
Template: C:\www\minapp\Application.cfc

Still no progress..

5

Hi Goran,

Please read this guide of lightwire
http://ortus.svnrepository.com/coldbox/trac.cgi/wiki/cbLightwireGuide

You are trying to mixing of different concepts (Lightwire and Model
Integration)

For model integration you can do this
getModel("BaseModel").test() then this will inject required
dependencies.

Thanks
Sana

6

You can also use cfproperty injections alongside lightwire and
coldspring but you need to tell coldbox to wire them up also because
they are coming from a factory already. So what you are missing is the
autowire property on the cfcomponent tag.

7

Great! It was the autowire property that was missing.

So now I have this class in my model directory:

<cfcomponent name="BaseModel" output="false" autowire="true">
<!--- Dependencies injected by ColdBox Bean Injector --->
<cfproperty name="htmlBaseURL" type="coldbox:setting:htmlBaseURL" />

<cffunction name="test" access="public" returntype="any">
  <cfset var baseURL = "">
  <cfset baseURL = variables.htmlBaseURL>
  <cfreturn baseURL>
</cffunction>
</cfcomponent>

Wired in LightWire (/config/LightWire.cfc):
// BaseModel
    addSingleton("#cfcModelRoot#.model.BaseModel","BaseModel");
    addConstructorProperty("BaseModel","coldbox",getController() );

And in my default event handler (general.cfc) I have this method:

<cffunction name="index" access="public" returntype="void"
output="false">
    <cfargument name="Event" type="any">
    <!--- RC Reference --->
    <cfset var rc = event.getCollection()>
<!-- my test object --->
    <cfset rc.testobj = getPlugin("ioc").getBean("BaseModel").test() />

    <!--- Do Your Logic Here to prepare a view --->
    <cfset Event.setValue("welcomeMessage","Welcome to ColdBox!")>

    <!--- Set the View To Display, after Logic --->
    <cfset Event.setView("home")>
  </cffunction>

And it´s working, with LightWire and CB DI. Cool!

So now I can use: <cfproperty name="beanFactory"
type="coldbox:plugin:beanFactory"
scope="instance" />

And then use the beanFactory in my model when I need to have transfer
objects injected in to my model. If I remember the autowire property!
And if I do it right I only have one object (BaseModel) that knows
about the framework, and my event handlers will have less code.

Thanks for your patience, and help!

Ten Four!
(from a bridge at Junibacken, Stockholm)