Calling WebDynpro Application and Passing parameters

Question

Hi,
I want to call a webdynpro application from another application and also i want to pass parameters to the called webdynpro application.
Is there an example on SDN which shows how this can be done. If not please advise how this can be done.
Thanks and Regards
Sidharth

Answer 1

Hi Sidharth,
until the tutorial is available, here's a step by step guide.
1. Create an outbound exit plug, for example "CallApp" in an interface view controller belonging to the calling component.
2. Add a string parameter 'Url' to the plug "CallApp". It's important that the parameter starts with uppercase 'U'.
3. Declare a controller usage of the interface view controller for the view controller, which will fire the plug.
4. Add an action to the calling view controller.
5. Add the following code snippet to the method body of the action handler. Change the application name "CalledApp" to the name of your called application and the wdThis.wdGet<YourInterfaceView>Controller().wdFirePlugCallApp(url) so that it matches the names you defined. The example will not work, if the application is not part of the deployable object the calling component resides in.
IWDDeployableObject componentDPO = wdComponentAPI.getDeployableObjectPart().getDeployableObject();
String appName = "CalledApp";
WDDeployableObjectPart[] applicationParts = componentDPO.getParts(WDDeployableObjectPartType.APPLICATION);
WDDeployableObjectPart appPart = null;
for (int idx = 0; idx < applicationParts.length; idx++) {
  appPart = applicationParts[idx];
  if (appPart.getShortName().equals(appName)) {
    break;
  appPart = null;
if (appPart == null) {
  throw new WDRuntimeException(
    "The application: " + appName + " is not a part of: " + componentDPO.getName());
Map urlParameters = new HashMap(1);
urlParameters.put(ClientConstants.APPLICATION_PREFIX + "Param1", "Parameter sent by caller.");
try {
  String url = WDURLGenerator.getApplicationURL(appPart, urlParameters);
  wdThis.wdGet<YourInterfaceView>Controller().wdFirePlugCallApp(url);
} catch (WDURLException e) {
  throw new WDRuntimeException(e);
6. Add a string value attribute named "ReceivedParameter" to the context of the component controller owning the target interface view.
7. Declare a controller usage of this component controller for the target interface view controller.
8. Add a startup plug to the target interface view controller. Add a parameter ("Param1" in this example) to the plug. It's important, that the name of the plug parameter is the same (case sensitive) as used for the URL generation.
9. Add the following to the method body of the startup plug handler:
wdThis.wdGet<YourComponent>Controller().wdGetContext().currentContextElement().setReceivedParameter(Param1);
10. To check, if the parameter passing works, map a value attribute in a view controller to the component controller context and bind e.g. the text property of a TextView to that attribute.
Hope that helps.
Regards
Stefan