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Saturday 4 July 2015

ADF Basics: How to invoke model layer methods from managed bean (Best Practice to write business logic in ADF)

Again a post about ADF Basics for those who are starting with ADF
This topic is posted multiple times and one of the most asked question on OTN

How to access AM method in bean ?
How to pass parameters to model from managed bean (viewController) ?
How to pass taskFlow parameter to model ?

Or sometimes I have to tell user that you should not access ApplicationModule or not update model from managed bean and then i post a link about this
I often post a link of Frank's blog
Best practice invoking business services methods from JSF beans
It is well explained but still user not able to do because he/she doesn't know about clientInterface, pageDef etc

So i thought to write a step by step implementation of this and if you want to know why it is best to call method through binding layer ?
Then please refer Frank's blog :)

What i am going to explain is How to call a method defined in ApplicationModule Impl class in managed bean ?
So for this first i need to define a method in ApplicationModule Impl class

Here i am using Departments table of HR Schema and i have created a method to create new row in Departments viewObject
See implementation part -

  • To create AMImpl class--> Open ApplicationModule in editor--> Goto Java tab--> Click on edit (pencil) icon and check the checkbox to generate class

  • Now write your logic and create method here so i have created a method to create department record and this method takes a parameter i;e DepartmentId

  •     /**
         *Custom Method to create row in departments viewObject
        public void createDepartmentRecord(Integer deptId) {
            ViewObject deptVo = this.getDepartmentsVO1();
            Row newRow=deptVo.createRow();
            newRow.setAttribute("DepartmentId", deptId);

  • Next step is to add this method to client interface so that we can access this , Again open AM in editor -->Go to Java tab--> Click on edit icon of clientInterface--> Shuttle method to selected side

  • Now to add this method in pageDef , Open page in editor--> Click on Bindings tab (bottom of editor)--> Click on green plus icon of bindings section--> Select methodAction and click on ok

  • Now select method name here and click ok

    Now you can see this method is added in pageDef

  • Now time to call this method in managed bean so for that added a button in page and created actionListener in bean . See the code 

  •     /**Method to get Binding Container of page
         * @return
        public BindingContainer getBindings(){
            return BindingContext.getCurrent().getCurrentBindingsEntry();
        /**Calling method defined in AMImpl class to create new Department
         * @param actionEvent
        public void callAMMethodToCreateDepartmentAction(ActionEvent actionEvent) {
            //Get OperationBinding of method
            OperationBinding ob=getBindings().getOperationBinding("createDepartmentRecord");
            //Passing parameter to method -Get parameter map and use paramater name as key
            ob.getParamsMap().put("deptId", 9999);
            //Execute this method
            //Check for errors
                // Successfully Executed

  • Now run application and check , is it working ? ;)

On click a new row is inserted in table with DepartmentId 9999

All done :)
In same way you can call method defined in any model implementation class, remember don't access ApplicationModule or viewObject directly , make use binding layer
and again why it is best practice ?? to know this read Frank's blog :)

Cheers :) Happy Learning 


  1. thank for this post

    its possible to to explain how we can invoke method that return rowset and in managed bean and iterate through this and return the value in tabular

    1. Prince

      Yes you can return RowSetIterator from model layer and add values in a List to show in af:table


  2. thank Ashish

    please can your share us code to do this

  3. I've tried this, even had it working at sometime, but I changed the method and now it doensn't work. keeps giving me the error:

    XXX being the name of my connection.
    What troubles me is that if I run the AM it works fine.

    1. Because of the tags on ADF errors the error doesn't show it was like this

      <Warning> <oracle.adf.share.jndi.ReferenceStoreHelper> <BEA-000000> <Incomplete connection reference object for connection:XXX>

    2. Daniel

      First delete method from pagedef, remove it from client interface and then change it's name and again add to client interface and pageDef
      Doins this way it'll work


  4. Hello Ashish. Could you help me with following problem in ADF 12?
    I have AM1 (which "connect" to database1) and AM2 (which "connect" to database2).
    AM1 have VO1
    AM2 have VO2

    I want to create one custom ADF BC Method which doing following:
    1) set bind_var for VO1, execute VO1
    2) result of VO1 map to bind_var VO2, execute VO2

    How can I do this?

    1. I'm kind of new in ADF and I may be wrong but the way I'd do it would be having two methods calling each other, something like this:

      import AM2_impl;

      ... do stuff ...
      return AM2_impl.meth2(pojo_holding_data);


      meth2(pojo data_from_AM1){
      ... do stuff ...

      this is just a general concept, but I hope it helps

  5. Hi Ashish, I follow all your blogs. It really helps me to develop screens. I have been working on ADF for sometime. I keep wondering, Where are you getting the class and methods information to customize any functionality in ADF(Eg:BindingContext.getCurrent().getCurrentBindingsEntry() to call binding related methods). Is this documented anywhere. Because I have gone through couple of ADF tutorials. I could not find anywhere.

    1. Hi Sudha

      There is plenty of information in Oracle docs and in many blogs, Here you can find some handy codes Some handy code for your managed Beans ( ADF & JSF )


  6. thanks for the tips and information..i really appreciate it.. It managed services