Using the approach Igor mentioned - which sounds great - does the
AssetFactory cache the images or he would need to implement this if he
wanted to?
_______________________
Everton Agner Ramos
2010/12/9 Michael Gentry <mgen...@masslight.net>
> I took a more conventional approach. I created a DatabaseImage page
> that streams the image from the database.
>
> In the TML of the page that wants to embed an image from the database:
>
> <img src="${imageLink}"/>
>
> In the Java:
>
> @Inject
> private PageRenderLinkSource pageRenderLinkSource;
>
> public Link getImageLink()
> {
> String encryptedContext = DatabaseImage.encrypt(...);
> return
> pageRenderLinkSource.createPageRenderLinkWithContext(DatabaseImage.class,
> encryptedContext);
> }
>
> The encrypt method basically encrypts everything I need (table names,
> primary keys, etc) to go find the database image and stuffs it into
> the link's context. At runtime, I end up with requests from the
> browser like:
>
> GET
> /MyApp/databaseimage/$002faiNglawZWKGHKrl$002fgpKneotYRwaq9gMk3dPr5zQkW8KkoezyRBm0TutynHstG0$002fyn$002b6izoD$002f$002f9V$000a$002fqAXmUmgxQ$003d$003d
>
> Ugly URL, but it works. In the DatabaseImage page itself I have:
>
> public StreamResponse onActivate(String context)
> {
> ...
> }
>
> that decrypts the encrypted context, finds the image blob stored in
> the database, and streams it out as the response.
>
> mrg
>
>
> On Thu, Dec 9, 2010 at 7:22 AM, Igor Drobiazko <igor.drobia...@gmail.com>
> wrote:
> > There is no documentation for it as this is not an often use case.
> However,
> > just provide you own implementation of AsssetFactory, build it or bind it
> in
> > your module and make the contribution:
> >
> > public void contributeAssetSource(MappedConfiguration<String,
> > AssetFactory> configuration, @InjectService("DbAssetFactory")
> AssetFactory
> > dbAssetFactory) {
> > configuration.add("db", dbAssetFactory);
> > }
> >
> > Now it is up to you to implement the AssetFactory.
> >
> > On Thu, Dec 9, 2010 at 11:53 AM, Gunnar Eketrapp
> > <gunnar.eketr...@gmail.com>wrote:
> >
> >> Hi!
> >>
> >> I would like to store uploaded images in the database and then use them
> in
> >> template files.
> >>
> >> Are there any examples of how to do this? I.e. how to define a new
> >> AssetFactory and contribute it to the AssetSource service configuration.
> >>
> >> Thanks in advance,
> >> Gunnar Eketrapp (from a very cold and snowy Stockholm)
> >>
> >> ==================================
> >> The doc says ...
> >>
> >> New Asset Domains
> >>
> >> If you wish to create new domains for assets, for example to allow
> assets
> >> to
> >> be stored on the file system or in a database, you may define a new
> >> AssetFactory and contribute it to the AssetSource service configuration.
> >>
> >> ===================================
> >>
> >
> >
> >
> > --
> > Best regards,
> >
> > Igor Drobiazko
> > http://tapestry5.de
> >
>
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