Jonathon Stierman said the following on 7/9/2007 2:06 PM:
I figured ColdSpring would just run some magic on my properties and
automatically figure out that they should be set in the init-method rather
than in the init() constructor, but CS threw an error at me indicating it
was still looking for a generic set[myDependency]() method. Here’s my
config.xml:
<!-- File loaded by ColdSpring to perform dependency injection -->
<beans>
<bean id="Articles" class="Components.Articles" singleton="true">
<constructor-arg
name="datasource"><value>${datasource}</value></constructor-arg>
</bean>
<bean id="Categories" class="Components.Categories" singleton="true"
init-method="setup">
<constructor-arg
name="datasource"><value>${datasource}</value></constructor-arg>
<property name="articleCFC"><ref bean="Articles"
/></property>
</bean>
</beans>
And here’s my Categories.cfc:
<cfcomponent hint="Add/Edit/Delete Categories">
<cfset Variables.datasource = "" />
<cfset Variables.articlesCFC = "" />
<cffunction name="init" access="public"
returntype="Components.Categories" hint="I initialize myself">
<cfargument name="datasource" type="string"
required="false" />
<cfset Variables.datasource = arguments.datasource />
<cfreturn this />
</cffunction>
<cffunction name="setup" access="public"
returntype="Components.Categories" hint="I post-initilize myself for
circular dependencies">
<cfargument name="articlesCFC"
type="Components.Articles" required="false" />
<cfset Variables.articlesCFC = arguments.articlesCFC />
<cfreturn this />
</cffunction>
</cfcomponent>
What’s the syntax for making the init-method concept work? I googled around
a bit, but kept getting matches regarding the regular init() constructor
rather than the init-method usage.
Jonathon
Doesn't appear that my original message hit the list. Here it is again...
<beans>
<bean id="Articles" class="Components.Articles" singleton="true">
<constructor-argname="datasource"><value>${datasource}</value></constructor-arg>
</bean>
<bean id="Categories" class="Components.Categories" singleton="true"
init-method="setup">
<constructor-arg
name="datasource"><value>${datasource}</value></constructor-arg>
<property name="articleCFC"><ref bean="Articles"/></property>
</bean>
</beans>
The property tag requires a setter for dependencies injection. Like this:
<cfcomponent hint="Add/Edit/Delete Categories">
<cfset Variables.datasource = "" />
<cfset Variables.articlesCFC = "" />
<cfset variables.somethingThatNeedsToBeDonePostDependencyResolution = ""
/>
<cffunction name="init" access="public" returntype="Components.Categories"
hint="I initialize myself">
<cfargument name="datasource" type="string" required="false" />
<cfset variables.datasource = arguments.datasource />
<cfreturn this />
</cffunction>
<cffunction name="setArticlesCFC" access="public" returntype="void"
hint="Dependency: injected">
<cfargument name="articlesCFC" type="Components.Articles"
required="true" />
<cfset variables.articlesCFC = arguments.articlesCFC />
</cffunction>
<cffunction name="setup" access="public" returntype="void" hint="Post
initialization stuff">
<cfset
variables.somethingThatNeedsToBeDonePostDependencyResolution =
variables.articlesCFC.something() /
</cffunction>
</cfcomponent>
The setup() method (using init-method) is used if the CFC that you're
wiring needs to perform some type of processing on stuff *after* all the
dependencies have been resolved. ColdSpring does *not* inject
constructor arg style elemented into your setup method -- I added it to
my example above.
.Peter
