Thanks for the tip.
I find a solution to this problem by simply passing the filename as the
link's param, like this:
public Link getSmallThumbnailImageURL(){
return resources.createActionLink("imageFileURL", false,
new
Object[]{getImageFilename()});
}
public StreamResponse onImageFileURL(String imageFilename) {
....
thx!
Ronald
Josh Canfield-2 wrote:
>
> The @Persist("flash") removes the object after page B is processed the
> first
> time, then when you call the action handler page B is processed again and
> your field is null, as it should be.
>
> You should be able to simply add a cleanupRender method to page B which
> resets the flash persisted field. I believe that when the action event is
> triggered by the img it will get access the persisted field which nulls
> the
> field, and won't trigger the cleanupRender thus allowing the field to stay
> null.
>
> I haven't written the code, but I'm fairly sure that it should work and
> it's
> not much work to test it out.
>
> Good luck,
> Josh
>
>
> On 10/26/07, ronaldlee <[EMAIL PROTECTED]> wrote:
>>
>>
>> Hi,
>>
>> I am having problem with @Persist(Flash) and StreamResponse.. I am using
>> the
>> latest 5.0.6 release.
>> Here is my setup:
>> - I have two pages, page A is for uploading an image, and page B is for
>> previewing an image.
>> - Page A injects Page B, and Page B has a @Persist("flash") on a
>> "imageFilename" attribute.
>> - Page A's onSuccess method is called when an image file is uploaded
>> (using
>> tapestry-upload), then it will call Page B's setImageFilename method to
>> pass
>> on the filename being uploaded, then Page B is returned.
>> - Page B will use the StreamResponse approach to return the image file
>> (because the image file is stored in a location not directly accessible
>> from
>> Internet), following the tapestry howto's instruction
>> (http://wiki.apache.org/tapestry/Tapestry5HowToCreatePieChartsInAPage).
>> Page
>> B injects a ComponentResource for creating an action link, which in
>> return
>> will be inserted in the template.. see the howto's for more detail.
>>
>> And here is the problem, inside that "StreamResponse onImageFileURL()"
>> function, the "imageFilename" attribute is null (and as a result I cannot
>> read that file of course), but on Page B's template I am able to display
>> the
>> value ${imageFilename}. There may have something to do which come first
>> (the
>> onImageFileURL is called first before the imageFilename is set?).
>>
>> Is it an issue and is there any workaround? Or just I am doing it the
>> wrong
>> way?
>>
>> thx!
>> Ronald
>>
>> --
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>> Sent from the Tapestry - User mailing list archive at Nabble.com.
>>
>>
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