Hi,
I like that proposition. Is it possible to change ResourceTransformer and
include ResourceDependencies in Tapestry 5.3.* ?
Best regards,
Cezary
On Sat, Oct 8, 2011 at 12:35 AM, Howard Lewis Ship <hls...@gmail.com> wrote:
> True; so we need the Resource passed in, but also another object to
> collect additional dependencies, to trigger reloads. Say:
>
> public interface ResourceTransformer
> {
> /**
> * Read the source input stream and provide a new input stream of
> the transformed content.
> *
> * @param source
> * resource to be transformed
> * @return stream of output content
> * @throws IOException
> */
> InputStream transform(Resource source, ResourceDependencies
> dependencies) throws IOException;
> }
>
> public interface ResourceDependencies {
> // Adding a dependency tracks the dependency for changes; if the
> dependency changes then, at a minimum,
> // the main resource will be marked invalidated in any caches and
> reloaded/rebuilt as necessary.
> void addDependency(Resource dependency);
> }
>
>
> So, when you process an @import, you can use the source Resource to
> find the corresponding imported Resource, and you can then add that
> resource as a dependency.
>
>
> On Fri, Oct 7, 2011 at 9:30 AM, Cezary Biernacki <cezary...@gmail.com>
> wrote:
> > On Fri, Oct 7, 2011 at 5:17 PM, Howard Lewis Ship <hls...@gmail.com>
> wrote:
> >
> >> On Thu, Oct 6, 2011 at 11:23 AM, Cezary Biernacki <cezary...@gmail.com>
> >> wrote:
> >> > Hi,
> >> > OK. I need to get a permission as code is owned by my employer,
> hopefully
> >> I
> >> > should be able to get it next week. Anyway, it is easy to build such
> >> > integration with Tapestry 5.3 by implementing ResourceTransformer
> >> interface
> >> > and contributing it StreamableResourceSource.
> >> >
> >> > For both CoffeeScript and LessCSS I use their JavaScript compilers
> >> executed
> >> > from Java using for Mozilla's Rhino. CoffeeScript source is used
> >> > unmodified, but LessCSS required small bit of hacking.
> >> >
> >> > Only deficiency of ResourceTransformer is that does not support well
> >> > situations when a resource includes other files, e.g. by @import
> >> directive
> >> > in LessCSS - relative location of transformed files is unknown (so
> >> resolving
> >> > included files can not relative) and there is no good way to inform
> about
> >> > changes to dependencies (solved in my hack, but it would not work in
> >> T5.3).
> >> >
> >>
> >> So, could this be addressed by passing the underlying Resource to the
> >> ResourceTransformer? That's a minor change; it might be a breaking
> >> one, but that's acceptable in a beta for functionality introduced in
> >> the same release.
> >
> >
> > Great idea, it would solve problems with relative resources. What about
> > reporting of changes to included resources? I can not find a way to do
> that
> > in Tapestry 5.3 at least using non-internal services.
> >
> > Best regards,
> > Cezary
> >
>
>
>
> --
> Howard M. Lewis Ship
>
> Creator of Apache Tapestry
>
> The source for Tapestry training, mentoring and support. Contact me to
> learn how I can get you up and productive in Tapestry fast!
>
> (971) 678-5210
> http://howardlewisship.com
>
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