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From "Bob Schellink (JIRA)" <j...@apache.org>
Subject [jira] Commented: (CLK-564) Add ResourceService for serving static resources
Date Mon, 13 Jul 2009 12:59:14 GMT

    [ https://issues.apache.org/jira/browse/CLK-564?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12730332#action_12730332
] 

Bob Schellink commented on CLK-564:
-----------------------------------

Currently the ClickClick examples are hosted on GAE. But ClickClick places its resources under
/clickclick/* instead of /click/*, thus I need to manually make the /clickclick/* resources
available at build time. So I wanted to subclass ResourceService to provide a more generic
implementation to serve any resource.

I implemented a quick hack (won't check it in) to generify the ResourceService implementation
so any resource can be served, however changes had to be made to ClickServlet and VelocityTemplateService.
ClickClick also makes heavy use of CSS and JS template resources which is why I mentioned
the lazy loading approach in one of the comments above. This lead to me to ask if the scope
of this feature is limited to only /click/* resources, which it is.

I'll implement an Ant task to copy the resources and report back here how it worked out :)

> Add ResourceService for serving static resources
> ------------------------------------------------
>
>                 Key: CLK-564
>                 URL: https://issues.apache.org/jira/browse/CLK-564
>             Project: Click
>          Issue Type: New Feature
>          Components: core
>    Affects Versions: 2.0.2
>            Reporter: Malcolm Edgar
>            Assignee: Malcolm Edgar
>             Fix For:  2.1.0 RC2
>
>
> The Click static resource deployment strategy of writing *.htm, *.css and image files
to the web application /click/ directory does not work on all application servers. In particular
WebLogic and WebSphere have security restrictions which prevent this from occuring. In these
scenarios users are have to deploy these applications to the WAR file at build time.  Google
GAE also does not support this deployment mode.
> A solution to this problem is to use the ClickServlet to serve these resources. By adding
an additional web.xml mapping:
> 	<servlet-mapping>
> 		<servlet-name>ClickServlet</servlet-name>
> 		<url-pattern>/click/*</url-pattern>
> 	</servlet-mapping>
> The ClickServlet could use a ResourceService interface obtained from the ConfigService
which returns the resource data. A default ClickResourceService would be provided which loads
all the resources at application initialization time. This service would scan all the JAR
files for resources in META-INF/web as is currently done in XmlConfigService and would cache
them in memory. The service would also scan all the resources under the WAR /click/ directory.
These resources would override any defined in the application JAR files.
> This could be a good feature for 2.1.0, we should possibly delay the 2.1.0 RC release
to include this feature.

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