[TYPO3-dev] 7.0.2: How to display flashMessages from the initialization phase of a controller

[Thomas Hucke]

Hi,

in my controller I'm using initializeAction() method.
Now it could be that I'd configuration validation check being done there 
would like to fire flashMessages to the FE.
Unfortunately the method addFlashMessage() throws an error (calling method 
of a non-object).
The reason is that AbstractController uses 
$this->controllerContext->getFlashMessageQueue() ... but 
$this->controllerContext is not initialized when procession 
initializeAction().

Now I've got the idea using the signalSlotHandler 
'emitBeforeCallActionHandler' for adding the messages which brings me to the 
next issue (see 'TYPO3 7.0.2: Cannot connect to signalSlot' in this list).
Does anybody have another idea how to add those flashMessages whithout 
having to call a method in every actionHandler?

Thanks
Thomas