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Object Oreinted Approach in Coldfusion

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introduces the OOPs in CF and mentions the advantages of OOPs. Problems faced in OOPs and managing Components using Coldspring.

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[object Object],[object Object],[object Object],[object Object],[object Object],Inside your controller code: <cfset var dsn = createObject( “component”, “ cfcs.datasource” ).init( “testdb” ) > <cfset variables.dao = createObject( “component”, “ cfcs.mysql.dao” ).init( dsn ) >
[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Inside your factory: <cffunction name=“getDatasource”> <cfreturn createObject( “component”, “ cfcs.datasource” ) .init( “testdb” ) > </cffunction> <cffunction name= “getDAO”> <cfreturn createObject( “component”, “ cfcs.mysql.dao” ) .init( getDatasource() ) </cffunction> ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Selecting factories at startup: <cfif dbType is “mysql”> <cfset application.factory =createObject( “component”,“cfcs.mysqlfactory” ) .init() > <cfelse> <cfset application.factory = createObject( “component”, “ cfcs.oraclefactory” ) .init() > </cfif>
[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
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[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Datasource CFC (abbreviated) 􀀀 <cfcomponent> <cffunction name=“init”> <cfargument name=“name”> <cfset variables.name = arguments.name> <cfreturn this> </cffunction> <cffunction name=“getName”> <cfreturn variables.name> </cffunction> </cfcomponent> DAO CFC (abbreviated) 􀀀 <cfcomponent> <cffunction name=“init”> <cfargument name=“dsn”> <cfset variables.dsn = arguments.dsn> <cfreturn this> </cffunction> <cffunction name=“getDSN”> <cfreturn variables.dsn> </cffunction> </cfcomponent> Application Initialization <cfset application.cs = createObject(“component”,“coldspring.beans.DefaultXmlFactory”).init() > <cfset application.cs.loadBeans(expandPath(“cs.xml”)) > Application Code <cfset dao = application.cs.getBean(“dao”) > Returns a fully initialized data access object <cfset dsn = dao.getDSN() > ColdSpring resolved the dependency and created (and initialized) the datasource bean first, then created the data access object bean and initialized it with the datasource bean.
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],XML Examined (1) <bean id=“dao” type=“cfcs.mysql.dao”> Specifies that “dao” resolves to cfcs.mysql.dao type – can easily change to cfcs.oracle.dao etc <constructor-arg name=“dsn”> Specifies a constructor argument – ColdSpring creates the argument value (a bean) and passes it into the constructor automatically Could use <property> instead and ColdSpring would call setXxx()method to set the property XML Examined (2) <bean type=“cfcs.datasource”> Unnamed object passed to“dao” constructor <constructor-arg name=“name”> Specifies constructor argument for this datasource bean <value>testdb</value> Specifies the (string) value passed to the constructor: obj.init(name=“testdb”)

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Object Oreinted Approach in Coldfusion

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  • 16. Datasource CFC (abbreviated) 􀀀 <cfcomponent> <cffunction name=“init”> <cfargument name=“name”> <cfset variables.name = arguments.name> <cfreturn this> </cffunction> <cffunction name=“getName”> <cfreturn variables.name> </cffunction> </cfcomponent> DAO CFC (abbreviated) 􀀀 <cfcomponent> <cffunction name=“init”> <cfargument name=“dsn”> <cfset variables.dsn = arguments.dsn> <cfreturn this> </cffunction> <cffunction name=“getDSN”> <cfreturn variables.dsn> </cffunction> </cfcomponent> Application Initialization <cfset application.cs = createObject(“component”,“coldspring.beans.DefaultXmlFactory”).init() > <cfset application.cs.loadBeans(expandPath(“cs.xml”)) > Application Code <cfset dao = application.cs.getBean(“dao”) > Returns a fully initialized data access object <cfset dsn = dao.getDSN() > ColdSpring resolved the dependency and created (and initialized) the datasource bean first, then created the data access object bean and initialized it with the datasource bean.
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