Regarding Component interface controller

hi all
Can anyone explain me use of Component Interface Controller under Component with example.
Thanks in advance
Imityaz

Hi,
Interface Controller
One Web Dynpro Component may declare the use of another Web Dynpro Component to form a u201CParent-Childu201D usage relationship. In such cases, the only point of interaction between the parent and child components is the functionality found in the childu2019s interface controller.
if an interface controller is part of a component interface, the controller editor is in change mode and the context, the events and the methods can be implemented and edited directly.
Refer this thread,step by step procedure is there.
/docs/DOC-8061#61 [original link is broken]
http://help.sap.com/saphelp_nw70/helpdata/EN/47/45641b80f81962e10000000a114a6b/frameset.htm
http://help.sap.com/saphelp_nw70/helpdata/EN/44/0dcafa2d9d1ca2e10000000a11466f/frameset.htm
Regards,
Sunaina Reddy T

Similar Messages

Design question: Interface Controller vs. component controller

Hello,
I have a component A. This component has a component controller (compController) and an interface controller (intController).
Component controller has method compMethod()
Interface controller has method intMethod()
- Am i allowed to call intMethod from component controller? ( i'm pretty sure this isnt bad design because this is also done in the tutorial on eventing)
- Am i allowed to call compMethod from intController or is this bad design?
- Am i allowed to subscribe compController to event in intController or is this bad design?
Kind regards,
Joren

Hi Joren,
like Valery already pointed out, we recommend not to implement any logic in the component interface controller but only implement methods used for delegating logic to the component controller. This is based on the fact, that the component interface controller will be implemented by the component controller in the the next major SAP NetWeaver Release. This means that it will not have its own Java class like in NW04 and NW04s. To simplify migration the interface controller code should be as slim as possible by applying the delegation principle.
You wrote:
<i>- Am i allowed to call intMethod from component controller? ( i'm pretty sure this isnt bad design because this is also done in the tutorial on eventing)</i>
Yes, my (very old) tutorial on serverside eventing exposes a public method <i>fireEvent()</i> which is invoked by the component controller. In early versions of NW04 the wdFireEventInnerEvent() method was not exposed in the IPublic-API of the component interface controller but only in the IPrivate-API. Therefore an additional method fireEvent() must be defined to fire the event from another controller. As a negative side effect, this public fireEvent() method is also exposed by the IExternal-API of the component interface controller so that the event can be fired from outside (by the Embedder component) which is not desired in most cases.
Meanwhile the wdFire<event name>() method is exposed by the IPublic-API of the component interface controller, so that the public method fire<Event name>() is no longer needed.
I will update the tutorial in this respect so that it again propagates best practices.
Regards, Bertram

How to create a method in Interface Controller

Hi Guys,
        I am working with webdynpro ABAP sample application "Component usage" . There i got a issue like i am not able to create a method in Interface controller. There i am not able to edit anything. Can anybody please let me know how to do that.
            Thanks In Advance
Regards
Ravikumar

Hi Ravi,
          Check This
If one Web Dynpro component (parent component) needs access to another Web
Dynpro component (child component) the parent component can declare the use
of the child component. A specific component usage instance is then created and
the parent component accesses the functionality of the child component via its
component interface controller.
The only parts of a Web Dynpro component that are visible to the user, are the
interface controller and the interface view(s).
All Web Dynpro components have only one interface controller. Via the
interface controller, data, methods, and event handlers can be exposed to
other components.
Interface views represent the visual interface of a Web Dynpro component.
There is a one-to-one relationship between a Window and an interface view.
Each time a window is defined, a related interface view is automatically
generated, which makes the window accessible from outside the component.
The interface view only exposes those inbound and outbound plugs to the
component user that have the interface property checked. Methods and
context data of the window are not accessible via the related interface view.
If the component has no views, there is no need to have Windows. In this
case, the component will not implement an interface view. Such components
having no visual interface are known as faceless components.
Regards
Sarath

Call WebDynpro component interface

Hi experts
We have developed a WebDynpro component to export context data node to excel file using jakarta poi libs.
This component have all logic to generate the excel file, and have only one method in component interface controller, this method is called with other WebDynpro components and work fine.
Now we have new requeriments, we need to generate the same excel file with one scheduled task in KM.
Anyone know if is possible to call our WebDynpro component interface method from scheduled task?
Best regards

Hi Xavier
If I were you I'd just separate the logic to generate the excel from the WebDynpro component. If the logic is isolated in Java lib it can be invoked from WebDynpro component and also from the KM Scheduler. There is no necessity to invoke the whole WebDynpro component from KM scheduler. Moreover, I think that it's not possible.
BR, Siarhei

Component Interface , INterface controller in WEB UI

Hi Experts,
Can anyone tell me what is a component interface, component usage , Interface controller and interface view?
I am a beginner in WEB UI and is getting confused with these terms.
Please help.
Many Thanks,
Neeraj

Hi,
component interface -> interface view:
Here you can define which Comp/Window should be accessable from outside the component
For example: COMP_1/MainWindow in component interface means this can be accessed as usage from other component
component interface -> interface controller:
In this node there is 2 child nodes: Context and Events:
I don't know how to use Events. But in Context you can add context node from component controller, which can be accessed from outside. This is specially important, when you want to bind two context nodes from two different components.
You can see how this can be used in component controller class in the method WD_USAGE_INITIALIZE
component usage:
Here you can define a usage of of other component.
For example: In your COMP_2 you can create a usage from other component (COMP_1/MainWindow).
Regards,
Steve

CE: Mapping from Component-Controller to Component-Interface

Hi experts,
how can I map the context of a component controller to the component interface? There is a predefined data link between them but I do not find any possibility to edit this link.
Thank you for each hint,
Christoph

Hi,
Copy the context node from the component controller and paste it to the interface controller.
Regards
Ayyapparaj

Interface Controller of a Component

Hi,
Can anyone explain/provide any doc which explains using one component in another component using interface controller.
Warm Regards,
Imtiyaz

Hi,
Refer these links,
WebDynpro Componentization [original link is broken]
https://www.sdn.sap.com/irj/sdn/index?rid=/webcontent/uuid/c053bcfa-426e-2910-f28a-91dec33159d6 [original link is broken]
http://help.sap.com/saphelp_nw04/helpdata/en/15/0d4f21c17c8044af4868130e9fea07/content.htm
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/f727d100-0801-0010-4cbd-b0ad5c161945.
/people/sudhir.gorantla4/blog/2008/02/27/componentization-of-webdynpro-application-in-ce71
Regards,
Sunaina Reddy T

How to consume a method on the interface controller from another component?

Hello,
I have a project which contains two Components, A & B.
I have exposed a method at the interface controller of Component A. How can I consume it from Component B?

Hi,
First add ComponentA as a used webdynpro component in ComponentB. Then open the Interface Controller of B and switch to Properties Tab. Select Add in the "Required Controllers" section. From the dialog that appears, select A's interface controller. Then you can access A's method from B's interface controller as:
wdThis.wdGetAComponentInterface().<method>;
Regards,
Satyajit.

Call method of interface controller from component controller

hi,
I have created one method in the interface controller of a component. Now i have this method along with attributes to the component controller. Now from the component controller i want to call the method of the interface controller. How do i do it???

Hi,
You dont need to call the method from the interface controller when you are in the same component.
You can call the method which is in the component controller.
Interface controller is used to expose some methods to a different component.
Ex Comp a want to expose a method which will be used by comp b then you need the interface controller in comp a.
Comp b will use comp a as used component
then it will invoke the methods.
Regards
Ayyapparaj

Component controller Vs interface controller

Hi Experts
Please state me the difference and similarities between the component controller and interface controller
Regards
Noel

Hi
Similarities between these two is that both are controller but each having different purpose in the application
Component Controller
1.Starting point of any application,(you can't create any app without defining any Component)
2.Master Controller of the complete Component structure (View ,Model ,interface ,window)
3.If function defined in Component Controller or Custom Controller it is available to any controller within your component (Interface, View, Custom) but not available outside.
Interface Controller
1. To make Contents outside of the world one separate controller called Interface Controller come into picture
whose only task is to exposing of the content to outside.
take further help from following threads
1.[Component Controller,Custom Controller,interface controller|Component Controller,Custom Controller,interface controller;
2. [Basic Question regarding component Controller and component interface|Re: Basic Question regarding component Controller and component interface;
3.[controllers and components|Re: confused with controllers and components.;

How to create in the Interface controller of a component

Hi Gurus............
Could any one tel How to create a method in the interface controller of component
and use that componet into other comoponent as Used Contoller .
I Found following Tutorial but it was not cleared Description.
https://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/2e71ce83-0b01-0010-11a4-98c28a33195f
Thanks in Advance.

Hi all,
My actual requirement is as follows..
I have implemented some functionality in One component .
Here I want to create a new method in the interface controller, so that I should be able to access this method in another component by declaring this component as used component in another one.
My problem is, I am unable to create new method in interface controller of my component,
It is appearing i n 'disabled' mode.
Can any one please suggest me the appropriate solution?
Thanks in advance
SivaKumar

IN Compsition Environment: interface controller in web dynpro

Hi All,
I've installed NW CE 7.1 and am trying to trigger an event created in the Interface controller. I observed that the methods and the events declared in the interface controller are not accessible in the view level. Has the WD design time concepts undergone a change?. In short, I'm not able to add the Interface controller as a required controller in any of the views that are present inside the same component.
Any clues on this?
Regards
Satish.

Hi All,
I've installed NW CE 7.1 and am trying to trigger an event created in the Interface controller. I observed that the methods and the events declared in the interface controller are not accessible in the view level. Has the WD design time concepts undergone a change?. In short, I'm not able to add the Interface controller as a required controller in any of the views that are present inside the same component.
Any clues on this?
Regards
Satish.

Using Interface controller in OCA application

Hi,
My requirement is to pass information and screen control between two components in two different DCs.
My parent DC Component has to pass information to my child DC Component and also call the view assembly of the child DC.
I am using CE7.1 SP07 PAT003.
In my child DC I have created a component Interface Definition say ChildInterface. In the context of interface controller of ChildInterface I have added a string attribute. ChildInterface also has a view container.
Now in my Child component I add ChildInterface as my Implemented Interface. I map the window of the child component to the ChildInterface. To the view container I add the default view of the component.
Now I have created a public part and added the ChildInterface as an entity.
I add a dependency in my Parent Component to this child DC's public part.
At design time I can access my ChildInterface's context from my parent component. However, while adding a link from parent default view to ChildInterfaceView, it gives me an error. however on reload it suppress the error but doesnt open the java editors.
While trying to deploy the applications it gives me a deployment failure message.
Following is the trace-
<r id="1240744927041" t="16:52:07" d="2009-04-26" s="E" c="000" u="" g="" m="Missing app.xml in component C:\Program Files\SAP\IDE\CE\eclipse\plugins\com.sap.tc.mobile.dt.oca.rt\MI\bin\..\inbox\demo.sap.comparentimplementation\demo.sap.comparentimplementation.wdl">
<f n="LocationName" v=" (com.sap.tc.mobile.cfs.deploy.oca.OCADeployer:OCADeployer)"/>
<f n="ThreadName" v="main"/>
</r>
<r id="1240744927042" t="16:52:07" d="2009-04-26" s="E" c="000" u="" g="" m="Deployment of Mobile Component parent(1.0) failed --> java.io.IOException: Missing app.xml in component C:\Program Files\SAP\IDE\CE\eclipse\plugins\com.sap.tc.mobile.dt.oca.rt\MI\bin\..\inbox\demo.sap.comparentimplementation\demo.sap.comparentimplementation.wdl
     at com.sap.tc.mobile.cfs.deploy.oca.OCADeployer.deploy(OCADeployer.java:81)
     at com.sap.tc.mobile.cfs.deploy.DeploymentManager.processDeploymentStatusObjects(DeploymentManager.java:550)
     at com.sap.tc.mobile.cfs.deploy.DeploymentManager.processInbox(DeploymentManager.java:197)
     at com.sap.tc.mobile.cfs.init.FrameworkInitializer.init(FrameworkInitializer.java:192)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     at java.lang.reflect.Method.invoke(Method.java:585)
     at com.sap.tc.mobile.cfs.startup.pda.Startup.main(Unknown Source)
">
<f n="ThreadName" v="main"/>
</r>
<r id="1240744927695" t="16:52:07" d="2009-04-26" s="E" c="000" u="" g="" m="Resourcebundle sap.comtcmobilewdlitecontainer could not be found. Trying to use the default bundle.">
<f n="LocationName" v=" (com.sap.tc.mobile.wdlite.renderer.exception.OCAExceptionLocalizeHelper:)"/>
<f n="ThreadName" v="main"/>
</r>
<r id="1240744927696" t="16:52:07" d="2009-04-26" s="E" c="000" u="" g="" m="Internal Error. Please check the log file. --> java.lang.NoSuchMethodException: com.sap.tc.mobile.wdlite.framework.Start.setUpSystemMenu()
     at java.lang.Class.getMethod(Class.java:1581)
     at com.sap.tc.mobile.wdlite.progmodel.core.Application.resetSystemMenu(Application.java:260)
     at com.sap.tc.mobile.wdlite.progmodel.core.Application.enter(Application.java:242)
     at com.sap.tc.mobile.wdlite.progmodel.core.Application.setCurrent(Application.java:119)
     at com.sap.tc.mobile.wdlite.progmodel.core.Application.launch(Application.java:143)
     at com.sap.tc.mobile.wdlite.progmodel.core.Application.launch(Application.java:175)
     at com.sap.tc.mobile.wdlite.progmodel.core.WDLite.launchApplication(WDLite.java:334)
     at com.sap.tc.mobile.wdlite.framework.Start.runOnContext(Start.java:580)
     at com.sap.tc.mobile.wdlite.framework.Start.startApplication(Start.java:604)
     at com.sap.tc.mobile.wdlite.framework.Start.startContainer(Start.java:641)
     at com.sap.tc.mobile.cfs.framework.spi.FrameworkManager.startContainer(FrameworkManager.java:259)
     at com.sap.tc.mobile.cfs.init.FrameworkInitializer.init(FrameworkInitializer.java:230)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     at java.lang.reflect.Method.invoke(Method.java:585)
     at com.sap.tc.mobile.cfs.startup.pda.Startup.main(Unknown Source)
">
<f n="ThreadName" v="main"/>
</r>
<r id="1240744927697" t="16:52:07" d="2009-04-26" s="E" c="000" u="" g="" m="Internal Error. Please check the log file.">
<f n="LocationName" v=" (com.sap.tc.mobile.wdlite.renderer.exception.OCAExceptionHandler:)"/>
<f n="ThreadName" v="main"/>
Please help.
Regards,
Nisha

please do attach the trace files..
Meanwhile , just check the way you have implemented the interface and the interface defintion of achild node are correct.
Once the implementations are correct,there should not be problem in deployment.
Let us know if you need more info on interface definton creation ...
Regards,
Lakshmi
Edited by: Lakshmi Reddi on May 28, 2009 6:03 AM

How to throw and handle event defined in component interface

Hi folks,
I have defined a component interface with an event 'open_info'
I have some sub components which are implementing that component interface. I also get the two events generated (the interface check box is not marked)
I use those sub components and try to handle the event. but unfortunately the event is not handled.
I'm not sure if I do everything right. I checked the interface checkbox at the events tab of the controller of the sub component. I then may handle the event in the embedding main component. but it appears to be a different event.
probably I eed to access the interface controller and throw the event there, but I don't know how.
I couldn't fnd documentation or wdr* components which deal with that issue. do you have any suggestions?
regards
stefan

Hi Stefan,
Do the following in the component being used:
say component name is ZCMP_01
go to COMPONENTCONTROLLER
Create an Event with necessary parameters if needed, say Event name is EVNT_01 and has an importing parameter, say PARAM_01 type char10,
Make sure you have set the interface check box. Now this event is available in the INTERFACECONTROLLER.
Say ZCMP_01 has a view with a button, on click of the button, call a method in the COMPONENTCONTROLLER.
Perform all the required operations, At the required point, fire EVNT_01
wd_this->fire_EVNT_01_evt(
PARAM_01 = 'sample' ).
Now the other component that has to use ZCMP_01, say ZCMP_02
In the component properties od ZCMP_02, add usage for ZCMP_01, say USG_CMP_01
Go to the view in ZCMP_02 where you wish to handle the event EVNT_01 of ZCMP_01,
Go to Methods tab, create an event hadler, say EVNT_01_HNDLR ... method type = Event Handler,
Event = EVNT_01, Controller = INTERFACECONTROLLER, Component Use, USG_CMP_01.
Now your event handler will have foll parametrs: WDEVENT .. type ref to CL_WD_CUSTOM_EVENT,
PARAM_01 type CHAR10
Handle the event as required.
Regards,
Reema.

Map context node web dynpro to context DATA of interface controller ALV

Hi Experts,
I have started creating simple ALV by following the example in the below mentioned link.
https://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/3439404a-0801-0010-dda5-8c14514d690d
I have completed 95% development but stuck with last bit of
Set data to ALV for display (via reverse context mapping).
When Click on the Controller Usage button. The component controller of your Web Dynpro component DOES NOT appears on the right side of the screen.
Therefore I can not Map context node NODE_FLIGHTTAB of your Web Dynpro component to context DATA of the interface controller of the ALV component.
Could you please shed me light on this.
Your time and help much appreciated.
Best Regards
CB

Hi Chandra,
You need to add component controller first. Just go to the property tab of interface controller of the alv component and click on create button and then add the component controller. After that you'll be able to see the node in the context tab.
Regards
Arjun

Regarding Component interface controller

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