ADF : Scope Variables

Oracle ADF uses many variables and each variable has a scope.
There are five scopes in ADF (Application, Request, Session, View and PageFlow).
The below code snippest explains how to get value of each variable scope.

        AdfFacesContext adfCtx = AdfFacesContext.getCurrentInstance();
                
        //Page Flow Scope
        Map pageFlowMap  = adfCtx.getPageFlowScope();
        Object pageFLowVariable = pageFlowMap.get("VARIABLE_NAME");
        
        //View Scope
        Map viewMap  = adfCtx.getViewScope();
        Object viewVariable = viewMap.get("VARIABLE_NAME");
        
        //Session Scope
        HttpServletRequest request =
            (HttpServletRequest) FacesContext.getCurrentInstance().getExternalContext().getRequest();
        HttpSession session = request.getSession(false);
        Object sessionVariable = session.getAttribute("VARIABLE_NAME");
        
        //Request Scope
        Object requestVariable = request.getAttribute("VARIABLE_NAME");
        
        //Application Scope
        Map applicationMap = FacesContext.getCurrentInstance().getExternalContext().getApplicationMap();
        Object applicationVariable = applicationMap.get("VARIABLE_NAME");

Thanks

How to Pass Parameters to ActionListener in ADF

In some cases, it is required to pass a value to ActionListener of ADF Button.

The method that can be invoked by actionListeners has only one parameter of type ActionEvent. 
So I will explain how to pass parameter to that bean method however it contains only one paramater ActionEvent in method signature.

I added button to my page as below



The default signature of ActionLister is 




The workaround I used is adding an attribute tag from the JSF.Core inside the ADF Button So the code in the jsp page looks like this



Note "MyAttrName" is the name of paramater and "MyAttrValue" is the value of paramater.
You can bind  "MyAttrValue" to get any value from page definition.
Now I will write the followign code to get paramatervalue from bean

 
The variable "attrValue" holds the value of paramaters which is "MyAttrValue" in this example.

Thanks
Mahmoud Elsayed