Funny you should mention this, I actually had a quick try at doing this myself but I got a bit stuck... here's what I learned.
1. I was trying to use this technique http://wiki.apache.org/tapestry/Tapestry5HowToGetAnHTMLStringFromARenderCommandParameterto specify a FOP parameter to a Page (or Component) in a tml template. 2. From what I can see, there are two ways to return a StreamResponse 2a. Return a StreamResponse from the onActivate() method of a page 2b. Return a StreamResponse from an event handler method fired by a <t:eventlink /> 3. Unfortunately, you can not use the method suggested in option 1 for cases 2a or 2b because tapestry does not initialize or run the page render sequence when a StreamResponse is returned in either of these two cases. 4. I came to the conclusion that I would probably need to initialize the PageRenderQueue myself which would likely involve the use of internal tapestry classes.
