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From "Malcolm Edgar (JIRA)" <j...@apache.org>
Subject [jira] Created: (CLK-564) Add ResourceService for serving static resources
Date Tue, 30 Jun 2009 12:52:47 GMT
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: 2.1.0
            Reporter: Malcolm Edgar


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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