Firstly, thank you very much for your advice, it helps to a certain extend, but it also raises new questions.
Unfortunately, there's only one way to determine whether a zip-file contains an installation manual. Since the zip-file is on another server (where the nexus repository resides), I have to read it from an InputStream. If there isn't an installation manual, this reading can take up to 10 seconds. Initially - when there's not a user entry yet, I can disable the download-button. But once an application code is entered, I only render meta information from all the zip-file versions, so the user can pick a desired version (usually the most recent build). Only when the form is submitted, or the new download button pressed, the corresponding zip-file is read, and only then I can determine whether it contains an installation manual. But I have to enable the button if there is a user entry. That can be a very disapointing user experience. He/she starts the appication, the button is disabled. He/she then enters an application code, en presses the now enabled button, only to find out that there isn't an installation manual... One question that comes to mind is: is my use case so exceptional? A button for a resource is pressed, all I want is a nice feedback in case a resource isn't available... Personally, I'm not a great fan of disabling or 'invisibling' buttons. I adhere to the five-year-old-boy-philosophy concerning buttons: you should /allways/ be able to press them, that's what buttons are for. Your alternative (using the RestartResponseException) solves the 'white screen-problem', but there are a few drawbacks: - The URL of my application after pressing the button changes from http://localhost:9081/deploy/ to http://localhost:9081/deploy/?wicket:interface=:3:deploytabs:panel:deployForm:downloadinstallationmanual::IResourceListener::. I really like Wicket, but this is so annoying. Who wants this? I just want my original url back - and yes, I read all the posts on mount strategies. - What's worse, the user has entered an application code that generates other field values (like a dropdownlists for the versions). When the page is reloaded after a RestartResponseException, I want to initialize it with the afore entered data. I managed to do that using PageParameters (or the Session), but in that case the refresh button will always generate a 'prefilled' page, with the values of the lat entered application code. Regards, Hans Friederichs -- View this message in context: http://apache-wicket.1842946.n4.nabble.com/How-to-Handle-ResourceStreamNotFoundException-tp3749331p3752826.html Sent from the Users forum mailing list archive at Nabble.com. --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org
