How to Close the launchDialog of AdfFacesContext in Bean

Hi,
In my application i am opening a new dialog by using the API "launchDialog" of AdfFacesContext. I have one issue regarding client requirement. Here when user clicks on a launch button, it will launch a new dialogue as per the code written. But if user clicks on that launch button again and again without closing the already launched dialog, it keeps on opening as many new dialogues.
But it should not be the case as per requirement. My requirements are listed below.
1. If the dialogue is already opened, it should set focus to that rather opening a new dialogue.
2. Is it possible to close the launched dialogue from bean??
Can anyone help me regarding this???
Example code written
FacesContext context = FacesContext.getCurrentInstance();
UIViewRoot dialog = (UIViewRoot) JSFUtils.getFromSession("HelpViewRoot");
if (dialog == null) {
// Create the dialog UIViewRoot
ViewHandler viewHandler = context.getApplication().getViewHandler();
ViewHandler viewHandler = context.getApplication().getViewHandler();
dialog = viewHandler.createView(context, "/help/help.jspx");
dialog.setId("CALWINHELP");
JSFUtils.storeOnSession("HelpViewRoot", dialog);
RichCommandButton rcb = (RichCommandButton) JSFUtils.findComponentInRoot("helpBtnId");
HashMap properties = new HashMap();
properties.put("width", new Integer(200));
properties.put("height", new Integer(150));
properties.put("windowEmbedStyle", "inlineDocument");
HashMap parameters = null;
AdfFacesContext afContext = AdfFacesContext.getCurrentInstance();
DialogService ds = afContext.getDialogService();
if (ds.peekView() != null) {
ds.pushView(ds.peekView());
}else {
afContext.launchDialog(dialog, parameters, // no particular parameters
rcb, // launched from component - RichCommandButton
true, // show it in a dialog
properties);
Thanks & Regards
Perumal S

Hi,
according to the JavaDocs you can't. See: http://myfaces.apache.org/trinidad/trinidad-api/apidocs/org/apache/myfaces/trinidad/context/DialogService.html
Frank

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