How to get new controller instance instead of a cached one?

Question

Hi,
I have the following problem. I am working on a stateful mvc application. You can search for items and then click on a button which allows you to see the details of an item in a new window and it is possible to modify it.
I use standard javascript code to open the details windows:
window.open("item.do?itemnumber=1", "MyFirstWindow");
This works fine. It opens the first window. The item controller is called for the first time  and the do_init method will be executed.
Now, I open a second window with this code:
window.open("item.do?itemnumber=2", "MySecondWindow");
Unfortunately the framework will not create a second controller instance for the second window. It will use the already existing item controller (the do_init method will not be called).
Now, I have two windows open which both use the same controller instance.
So my question is: Is there the possibility to tell the framework that I need a new item controller instance for every new window?
I already checked various official url sap-parameters but did not find anything useful.
regards
Thomas

Answer 1

Hi,
sorry for not answering earlier. To be honest I thought there might a standard way to get a new controller instance. But it seems that is not the case. For everybody who is interested I think I will use the following solution.
I create a wrapper controller called itemwrapper.do. The view of this controller has the following layout:
<htmlb:content design="design2003" >
  <htmlb:document>
    <htmlb:documentHead>
    </htmlb:documentHead>
    <htmlb:documentBody>
              <bsp:call url     = "item.do"
                        comp_id = "<%= item_id %>">
                <bsp:parameter name="itemid" value="<%= item_id %>"/> 
              </bsp:call>
    </htmlb:documentBody>
  </htmlb:document>
</htmlb:content>
The wrapper controller is called like this: item.do?itemid=1234.
How does is works? The wrappercontroller gets a request -> it gets the itemid from the url -> it opens the view and fills the page attribute item_id. In the view the bsp:call extension will create a new item controller instance everytime a unique item_id is used.
regards
Thomas