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From "Marcel Offermans (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ACE-174) Configuration artifacts can not be updated due to infinite cache
Date Thu, 01 Sep 2011 08:20:09 GMT

    [ https://issues.apache.org/jira/browse/ACE-174?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13095180#comment-13095180
] 

Marcel Offermans commented on ACE-174:
--------------------------------------

Artifacts, once created, are assumed to be immutable. If something changes, you're supposed
to create a new URL for it. For bundles this means you should probably create file names based
on its symbolic name + version, for other types of artifacts, you should use some kind of
unique name + some kind of version number.

That does not invalidate your comment about the cache not using weak references though, so
that's something we need to look into.

> Configuration artifacts can not be updated due to infinite cache
> ----------------------------------------------------------------
>
>                 Key: ACE-174
>                 URL: https://issues.apache.org/jira/browse/ACE-174
>             Project: Ace
>          Issue Type: Bug
>    Affects Versions: 0.8.0
>            Reporter: Bram de Kruijff
>
> updating (or even drop/create) configuration artifacts is not being propagated to targets.
This is caused by the fact that the VelocityArtifactPreprocessor internally caches the bytes
indefinitely (at least  tight to the  onfiguration helper service lifecycle) using the configuration
artifact's url as the key. As a result checks on "needsNewVersion"will typically result in
false. Furthermore, please note that the cache implementation is a  threat to memory resources
as no weak references are being used.
> http://www.mail-archive.com/ace-dev@incubator.apache.org/msg01345.html

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