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Posted to users@tapestry.apache.org by Dmitry Shyshkin <sh...@devoler.com> on 2008/03/15 16:11:57 UTC
T5: Now to generate page with binary output
Hello, all
I want to generate image by tapestry page. Follow code successfully set
Content-Type and output image data, but after that exception is thrown :
java.lang.RuntimeException: Page resource/Image did not generate any
markup when rendered. This could be because its template file could not
be located, or because a render phase method in the page prevented
rendering.
Is there is a way to tell tapestry that page output is binary and
ResposeWriter won't be used for generation? I've thought about
StreamResponse but it accepted only from action events, not from render
phase events.
@Inject
private Response _response;
@BeginRender
void render() throws IOException {
Image image = ...;
IOUtil.transfer(image.getImage().getBinaryStream(),
_response.getOutputStream(image.getContentType()));
}
Thanks,
Dmitry
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Re: T5: Now to generate page with binary output
Posted by Josh Canfield <jo...@thedailytube.com>.
Take a look at the wiki:
http://wiki.apache.org/tapestry/Tapestry5HowToCreateASimpleGraphComponent
Since you aren't actually going to be injecting the image bytes into
the page your images are going to be loaded in a second request. You
can create an action link that actually returns the image bytes.
Deciding whether to create the image in the page render request, or in
the action request is up to you. A challenge with doing it in the page
render request is where to hold the bytes until the next request comes
in (that could be a lot of data to hold in the session). Otherwise you
can store the data used to generate the image, which also might be a
lot of data...
Josh
On Tue, Apr 15, 2008 at 3:03 AM, Sven Homburg <ho...@googlemail.com> wrote:
> i developed an component that genereates thumbnails of an gif/jpeg
> via Toolkit graphic methodes.
>
> after that the converted stream should injected into the page.
>
> 2008/4/15, Josh Canfield <jo...@thedailytube.com>:
>
> >
> > Why are you generating a binary stream during the render phase?
> >
> >
> > On Mon, Apr 14, 2008 at 3:55 PM, Sven Homburg <ho...@googlemail.com>
> > wrote:
> > > but how do i return a binary stream, that generated at render phase.
> > >
> > >
> > > 2008/3/17, Josh Canfield <jo...@thedailytube.com>:
> > >
> > > >
> > > > You need to return a StreamResponse
> > > >
> > > >
> > > >
> > http://tapestry.apache.org/tapestry5/apidocs/org/apache/tapestry/StreamResponse.html
> > > >
> > > > Also, check out the following for an example.
> > > >
> > > >
> > http://wiki.apache.org/tapestry/Tapestry5HowToStreamAnExistingBinaryFile
> > > > Josh
> > > >
> > > >
> > > > On Sat, Mar 15, 2008 at 8:11 AM, Dmitry Shyshkin <shyshkin@devoler.com
> > >
> > > > wrote:
> > > > > Hello, all
> > > > >
> > > > > I want to generate image by tapestry page. Follow code successfully
> > set
> > > > > Content-Type and output image data, but after that exception is
> > thrown
> > > > :
> > > > > java.lang.RuntimeException: Page resource/Image did not generate any
> > > > > markup when rendered. This could be because its template file could
> > not
> > > > > be located, or because a render phase method in the page prevented
> > > > > rendering.
> > > > >
> > > > > Is there is a way to tell tapestry that page output is binary and
> > > > > ResposeWriter won't be used for generation? I've thought about
> > > > > StreamResponse but it accepted only from action events, not from
> > render
> > > > > phase events.
> > > > >
> > > > > @Inject
> > > > > private Response _response;
> > > > >
> > > > > @BeginRender
> > > > > void render() throws IOException {
> > > > > Image image = ...;
> > > > > IOUtil.transfer(image.getImage().getBinaryStream(),
> > > > > _response.getOutputStream(image.getContentType()));
> > > > > }
> > > > >
> > > > >
> > > > > Thanks,
> > > > > Dmitry
> > > > >
> > > > >
> > > > >
> > ---------------------------------------------------------------------
> > > > > To unsubscribe, e-mail: users-unsubscribe@tapestry.apache.org
> > > > > For additional commands, e-mail: users-help@tapestry.apache.org
> > > > >
> > > > >
> > > >
> > > >
> > > >
> > > >
> > > > --
> > > >
> > > > --
> > > > TheDailyTube.com. Sign up and get the best new videos on the internet
> > > > delivered fresh to your inbox.
> > > >
> > > >
> > > > ---------------------------------------------------------------------
> > > > To unsubscribe, e-mail: users-unsubscribe@tapestry.apache.org
> > > > For additional commands, e-mail: users-help@tapestry.apache.org
> > > >
> > > >
> > >
> > >
> > > --
> > > with regards
> > > Sven Homburg
> > > http://tapestry5-components.googlecode.com
> > >
> >
> >
> >
> >
> > --
> >
> > --
> > TheDailyTube.com. Sign up and get the best new videos on the internet
> > delivered fresh to your inbox.
> >
> > ---------------------------------------------------------------------
> > To unsubscribe, e-mail: users-unsubscribe@tapestry.apache.org
> > For additional commands, e-mail: users-help@tapestry.apache.org
> >
> >
>
>
> --
> with regards
> Sven Homburg
> http://tapestry5-components.googlecode.com
>
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Re: T5: Now to generate page with binary output
Posted by Sven Homburg <ho...@googlemail.com>.
i developed an component that genereates thumbnails of an gif/jpeg
via Toolkit graphic methodes.
after that the converted stream should injected into the page.
2008/4/15, Josh Canfield <jo...@thedailytube.com>:
>
> Why are you generating a binary stream during the render phase?
>
>
> On Mon, Apr 14, 2008 at 3:55 PM, Sven Homburg <ho...@googlemail.com>
> wrote:
> > but how do i return a binary stream, that generated at render phase.
> >
> >
> > 2008/3/17, Josh Canfield <jo...@thedailytube.com>:
> >
> > >
> > > You need to return a StreamResponse
> > >
> > >
> > >
> http://tapestry.apache.org/tapestry5/apidocs/org/apache/tapestry/StreamResponse.html
> > >
> > > Also, check out the following for an example.
> > >
> > >
> http://wiki.apache.org/tapestry/Tapestry5HowToStreamAnExistingBinaryFile
> > > Josh
> > >
> > >
> > > On Sat, Mar 15, 2008 at 8:11 AM, Dmitry Shyshkin <shyshkin@devoler.com
> >
> > > wrote:
> > > > Hello, all
> > > >
> > > > I want to generate image by tapestry page. Follow code successfully
> set
> > > > Content-Type and output image data, but after that exception is
> thrown
> > > :
> > > > java.lang.RuntimeException: Page resource/Image did not generate any
> > > > markup when rendered. This could be because its template file could
> not
> > > > be located, or because a render phase method in the page prevented
> > > > rendering.
> > > >
> > > > Is there is a way to tell tapestry that page output is binary and
> > > > ResposeWriter won't be used for generation? I've thought about
> > > > StreamResponse but it accepted only from action events, not from
> render
> > > > phase events.
> > > >
> > > > @Inject
> > > > private Response _response;
> > > >
> > > > @BeginRender
> > > > void render() throws IOException {
> > > > Image image = ...;
> > > > IOUtil.transfer(image.getImage().getBinaryStream(),
> > > > _response.getOutputStream(image.getContentType()));
> > > > }
> > > >
> > > >
> > > > Thanks,
> > > > Dmitry
> > > >
> > > >
> > > >
> ---------------------------------------------------------------------
> > > > To unsubscribe, e-mail: users-unsubscribe@tapestry.apache.org
> > > > For additional commands, e-mail: users-help@tapestry.apache.org
> > > >
> > > >
> > >
> > >
> > >
> > >
> > > --
> > >
> > > --
> > > TheDailyTube.com. Sign up and get the best new videos on the internet
> > > delivered fresh to your inbox.
> > >
> > >
> > > ---------------------------------------------------------------------
> > > To unsubscribe, e-mail: users-unsubscribe@tapestry.apache.org
> > > For additional commands, e-mail: users-help@tapestry.apache.org
> > >
> > >
> >
> >
> > --
> > with regards
> > Sven Homburg
> > http://tapestry5-components.googlecode.com
> >
>
>
>
>
> --
>
> --
> TheDailyTube.com. Sign up and get the best new videos on the internet
> delivered fresh to your inbox.
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@tapestry.apache.org
> For additional commands, e-mail: users-help@tapestry.apache.org
>
>
--
with regards
Sven Homburg
http://tapestry5-components.googlecode.com
Re: T5: Now to generate page with binary output
Posted by Josh Canfield <jo...@thedailytube.com>.
Why are you generating a binary stream during the render phase?
On Mon, Apr 14, 2008 at 3:55 PM, Sven Homburg <ho...@googlemail.com> wrote:
> but how do i return a binary stream, that generated at render phase.
>
>
> 2008/3/17, Josh Canfield <jo...@thedailytube.com>:
>
> >
> > You need to return a StreamResponse
> >
> >
> > http://tapestry.apache.org/tapestry5/apidocs/org/apache/tapestry/StreamResponse.html
> >
> > Also, check out the following for an example.
> >
> > http://wiki.apache.org/tapestry/Tapestry5HowToStreamAnExistingBinaryFile
> > Josh
> >
> >
> > On Sat, Mar 15, 2008 at 8:11 AM, Dmitry Shyshkin <sh...@devoler.com>
> > wrote:
> > > Hello, all
> > >
> > > I want to generate image by tapestry page. Follow code successfully set
> > > Content-Type and output image data, but after that exception is thrown
> > :
> > > java.lang.RuntimeException: Page resource/Image did not generate any
> > > markup when rendered. This could be because its template file could not
> > > be located, or because a render phase method in the page prevented
> > > rendering.
> > >
> > > Is there is a way to tell tapestry that page output is binary and
> > > ResposeWriter won't be used for generation? I've thought about
> > > StreamResponse but it accepted only from action events, not from render
> > > phase events.
> > >
> > > @Inject
> > > private Response _response;
> > >
> > > @BeginRender
> > > void render() throws IOException {
> > > Image image = ...;
> > > IOUtil.transfer(image.getImage().getBinaryStream(),
> > > _response.getOutputStream(image.getContentType()));
> > > }
> > >
> > >
> > > Thanks,
> > > Dmitry
> > >
> > >
> > > ---------------------------------------------------------------------
> > > To unsubscribe, e-mail: users-unsubscribe@tapestry.apache.org
> > > For additional commands, e-mail: users-help@tapestry.apache.org
> > >
> > >
> >
> >
> >
> >
> > --
> >
> > --
> > TheDailyTube.com. Sign up and get the best new videos on the internet
> > delivered fresh to your inbox.
> >
> >
> > ---------------------------------------------------------------------
> > To unsubscribe, e-mail: users-unsubscribe@tapestry.apache.org
> > For additional commands, e-mail: users-help@tapestry.apache.org
> >
> >
>
>
> --
> with regards
> Sven Homburg
> http://tapestry5-components.googlecode.com
>
--
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Re: T5: Now to generate page with binary output
Posted by Thiago HP <th...@gmail.com>.
On 4/14/08, Sven Homburg <ho...@googlemail.com> wrote:
> but how do i return a binary stream, that generated at render phase.
Return your StreamResponse, just like in the wiki example cited
earlier, in an onActivate() method. ;)
--
Thiago
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Re: T5: Now to generate page with binary output
Posted by Sven Homburg <ho...@googlemail.com>.
but how do i return a binary stream, that generated at render phase.
2008/3/17, Josh Canfield <jo...@thedailytube.com>:
>
> You need to return a StreamResponse
>
>
> http://tapestry.apache.org/tapestry5/apidocs/org/apache/tapestry/StreamResponse.html
>
> Also, check out the following for an example.
>
> http://wiki.apache.org/tapestry/Tapestry5HowToStreamAnExistingBinaryFile
> Josh
>
>
> On Sat, Mar 15, 2008 at 8:11 AM, Dmitry Shyshkin <sh...@devoler.com>
> wrote:
> > Hello, all
> >
> > I want to generate image by tapestry page. Follow code successfully set
> > Content-Type and output image data, but after that exception is thrown
> :
> > java.lang.RuntimeException: Page resource/Image did not generate any
> > markup when rendered. This could be because its template file could not
> > be located, or because a render phase method in the page prevented
> > rendering.
> >
> > Is there is a way to tell tapestry that page output is binary and
> > ResposeWriter won't be used for generation? I've thought about
> > StreamResponse but it accepted only from action events, not from render
> > phase events.
> >
> > @Inject
> > private Response _response;
> >
> > @BeginRender
> > void render() throws IOException {
> > Image image = ...;
> > IOUtil.transfer(image.getImage().getBinaryStream(),
> > _response.getOutputStream(image.getContentType()));
> > }
> >
> >
> > Thanks,
> > Dmitry
> >
> >
> > ---------------------------------------------------------------------
> > To unsubscribe, e-mail: users-unsubscribe@tapestry.apache.org
> > For additional commands, e-mail: users-help@tapestry.apache.org
> >
> >
>
>
>
>
> --
>
> --
> TheDailyTube.com. Sign up and get the best new videos on the internet
> delivered fresh to your inbox.
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@tapestry.apache.org
> For additional commands, e-mail: users-help@tapestry.apache.org
>
>
--
with regards
Sven Homburg
http://tapestry5-components.googlecode.com
Re: T5: Now to generate page with binary output
Posted by Josh Canfield <jo...@thedailytube.com>.
You need to return a StreamResponse
http://tapestry.apache.org/tapestry5/apidocs/org/apache/tapestry/StreamResponse.html
Also, check out the following for an example.
http://wiki.apache.org/tapestry/Tapestry5HowToStreamAnExistingBinaryFile
Josh
On Sat, Mar 15, 2008 at 8:11 AM, Dmitry Shyshkin <sh...@devoler.com> wrote:
> Hello, all
>
> I want to generate image by tapestry page. Follow code successfully set
> Content-Type and output image data, but after that exception is thrown :
> java.lang.RuntimeException: Page resource/Image did not generate any
> markup when rendered. This could be because its template file could not
> be located, or because a render phase method in the page prevented
> rendering.
>
> Is there is a way to tell tapestry that page output is binary and
> ResposeWriter won't be used for generation? I've thought about
> StreamResponse but it accepted only from action events, not from render
> phase events.
>
> @Inject
> private Response _response;
>
> @BeginRender
> void render() throws IOException {
> Image image = ...;
> IOUtil.transfer(image.getImage().getBinaryStream(),
> _response.getOutputStream(image.getContentType()));
> }
>
>
> Thanks,
> Dmitry
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@tapestry.apache.org
> For additional commands, e-mail: users-help@tapestry.apache.org
>
>
--
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