source: EDIS/trunk/java/tracking-ui-core/src/main/flex/gov/va/med/edp/command/AbstractResponderCommand.as@ 1227

package gov.va.med.edp.command
{
        import flash.system.System;
        import flash.utils.getQualifiedClassName;
    import flash.net.URLRequest;
    import flash.net.navigateToURL;

    import gov.va.med.edp.control.ClearUnsavedViewsModelEvent;
    import gov.va.med.edp.control.SwitchAppViewEvent
    import gov.va.med.edp.model.TrackingModelLocator;
    import gov.va.med.edp.view.ErrorDialog;

import mx.core.Application;
import mx.events.CloseEvent;
    import mx.rpc.IResponder;
        import mx.rpc.events.FaultEvent;
    import mx.rpc.http.HTTPService;

    public class AbstractResponderCommand implements IResponder
        {  
        public function result(data:Object):void {
                        // NOOP: must override
                }
                
                public function fault(info:Object):void {
                        var f:FaultEvent = info as FaultEvent;
                        if (f.fault.faultCode == "Client.Error.RequestTimeout" || f.fault.faultCode == "Server.Error.Request") {
                handleServerUnavailable(f);
            } else if (f.fault.faultCode == HTTPService.ERROR_DECODING) {          // XML parser choking on HTML error page
                if (isLoginPage(String(f.fault.rootCause))) {
                    ErrorDialog.show("Your session appears to be invalid.\nYou will be now be asked to log in.\nUnsaved changes will be lost.", createFaultDetail(f), "Invalid Session", attemptLogin, "Login");
                } else {
                    handleServerError(f);
                }
            } else {
                handleUnknownError(f);
                        }
                }

        protected function getFaultMessage(faultEvent:FaultEvent) : String {
                        return faultEvent.fault.faultString;
                }
                
                protected function createFaultDetail(faultEvent:FaultEvent) : Object {
                        var detail:Object = {};
                        detail.command = getQualifiedClassName(this);
                        detail.fault = faultEvent.fault;
                        detail.totalMemory = System.totalMemory;
                        detail.currentTarget = faultEvent.currentTarget;
                        return detail;
                }

        protected function handleServerUnavailable(f:FaultEvent) : void {
            TrackingModelLocator.getInstance().disconnectionFault = f.fault;
            TrackingModelLocator.getInstance().disconnected = true;
        }

        protected function handleServerError(f:FaultEvent) : void {
                        if (TrackingModelLocator.getInstance().appName == TrackingModelLocator.APP_NAME_BIGBOARD) {
                                reloadBoard();
                        } else {
                ErrorDialog.fatal(getFaultMessage(f), createFaultDetail(f));  // sign of a unknown server-side error
                        }
        }

        protected function handleUnknownError(f:FaultEvent) : void {
                        if (TrackingModelLocator.getInstance().appName == TrackingModelLocator.APP_NAME_BIGBOARD) {
                                reloadBoard();
                        } else {
                ErrorDialog.show(getFaultMessage(f), createFaultDetail(f));     // default is non-fatal
                        }
        }

        private function isLoginPage(result:String):Boolean {
            return result.indexOf("<TITLE>Login Page</TITLE>") != -1;
        }

        private function attemptLogin():void {
            ClearUnsavedViewsModelEvent.dispatchClearUnsavedViews();
                        var request: URLRequest = new URLRequest(TrackingModelLocator.getInstance().rootURL);
                    navigateToURL(request, "_top");
        }

                private function reloadBoard():void {
                        if (TrackingModelLocator.getInstance().reloadFunction)
                                TrackingModelLocator.getInstance().reloadFunction.call(null);
                }
    }
}