cache/facade example

foo.cfc

<cfcomponent>

	<cfset variables.settings = structNew() />
		<cfset variables.settings.cacheExpirationSeconds = 10 />

	<cfset variables.instance = structNew() />
		<cfset variables.instance.cacheExpirationTime = 0 />
		<cfset variables.instance.cache = queryNew("foo") />

	<cffunction name="init" access="public" returntype="any" output="false" hint="">
    	<cfargument name="cacheExpirationSeconds" type="numeric" required="True" />
    	
		<cfset variables.settings.cacheExpirationSettings = 10 />
    	
    </cffunction>
	
	<cffunction name="isCacheExpired" access="private" returntype="boolean" output="false" hint="">
    	
    <cfreturn getTickCount() GTE variables.instance.cacheExpirationTime />
    </cffunction>
	
	<cffunction name="resetCacheExpiration" access="private" returntype="void" output="false" hint="">
    	
   		<cfset variables.instance.cacheExpirationTime = getTickCount() + (variables.cacheExpirationSeconds * 1000) />
    </cffunction>
	
	<cffunction name="getCacheSize" access="private" returntype="numeric" output="false" hint="">
	
	<cfreturn variables.instance.cache.recordCount />
	</cffunction>
	
	<cffunction name="updateCache" access="public" returntype="boolean" output="false" hint="">
    	
    	<cfif isCacheExpired() OR NOT getCacheSize()>
    	
    		<cfinvoke webservice="fooWebservice.cfc?wsdl" method="getAllTheData" returnvariable="variables.instance.cache">
    			<cfinvokeargument name="whateverArguments" value="foobar" />
    		</cfinvoke>
    		
			<cfset resetCacheExpiration() />
			
    	</cfif>
    	
    </cffunction>
	
	<cffunction name="searchData" access="public" returntype="query" output="false" hint="">
    	<cfargument name="q" type="string" required="True" />
    	
		<cfset updateCache() />
		
		<cfquery name="local.results" dbtype="query">
			SELECT * FROM variables.instance.cache
			WHERE
				foo = '%#arguments.q#%'
		</cfquery>
		
    <cfreturn local.results />
    </cffunction>

</cfcomponent>

fooFacade.cfc

<!--- your ajax call calls this facade method --->
<cffunction name="searchData" access="remote" returntype="query" output="false" hint="">
	<cfargument name="q" type="string" required="True" />
	
	<cfif NOT structKeyExists(application,"foo")>
		<cfset application.foo = createObject("component","foo").init(600) />
	</cfif>
	
<cfreturn application.foo.searchData(arguments.q) />
</cffunction>