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https://issues.apache.org/jira/browse/TAP5-2364?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14082371#comment-14082371
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ASF subversion and git services commented on TAP5-2364:
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Commit 7345bfb29bbb995209fcfb9f98f365b1cb643f68 in tapestry-5's branch
refs/heads/master from [~hlship]
[ https://git-wip-us.apache.org/repos/asf?p=tapestry-5.git;h=7345bfb ]
TAP5-2364: Tapestry can use prohibited operations in some environments, such as
Google App Engine
> Tapestry can use prohibited operations in some environments, such as Google
> App Engine
> --------------------------------------------------------------------------------------
>
> Key: TAP5-2364
> URL: https://issues.apache.org/jira/browse/TAP5-2364
> Project: Tapestry 5
> Issue Type: Bug
> Components: tapestry-webresources
> Affects Versions: 5.4
> Reporter: Jonathan Williams
> Assignee: Howard M. Lewis Ship
> Fix For: 5.4
>
>
> beta15 breaks GAE & some other prod environments
> I have a couple of app engine apps that are broken w/ beta15
> This is due to use of java.io.File to mkdir, which is prohibited on app
> engine and is more generally considered a JEE no-no.
> ...
> ResourceTransformerFactoryImpl creates a File for the asset cache directory.
> This breaks my app in GAE, since creating a new File is prohibited.
> ...
> it looks like the cache is only used in development
> mode but still references File in production (thus breaking GAE). Perhaps a
> proper fix will involve a pluggable cache which does nothing in production
> mode.
> As a workaround you can override the ResourceTransformerFactory via ioc
> with an implementation that doesn't reference java.io.File. Most likely a
> copy/paste/tweak of the current version.
> ...
> Note, this could also break non GAE environments since it calls mkdirs() on
> @Symbol(WebResourcesSymbols.CACHE_DIR). For example a unix server without
> write permission.
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