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https://issues.apache.org/jira/browse/ARIES-1565?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15393689#comment-15393689
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John Ross commented on ARIES-1565:
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Switching to Java 7 is not an option for at least some contributors and
consumers.
It would certainly be easy to provide a naive implementation on 6, but there
are a number of issues to be considered when playing with subdirectories of the
temp directory. See the Files.createTempDir() Guava source code comments for
more information. I would prefer to use existing and hardened utilities for
this if possible. I'm pretty sure the Apache 2.0 license would allow us to
simply copy that method from Guava as long as we provide the appropriate
attributions. Apache Commons does not have a utility for creating a temp
directory. It does, however, have an existing utility for deleting directories
recursively. If I'm correct that the Apache 2.0 license allows it, I would
suggest copying it from there. Between those two methods, we should have what
we need in order to complete this.
> Performance Improvement: unpack subsystem artifacts to tmp folder to avoid
> directly reading from zip archive
> ------------------------------------------------------------------------------------------------------------
>
> Key: ARIES-1565
> URL: https://issues.apache.org/jira/browse/ARIES-1565
> Project: Aries
> Issue Type: Improvement
> Components: Subsystem, Util
> Affects Versions: subsystem-2.0.8, util-1.1.2
> Reporter: Wouter Bancken
> Attachments: 1565.patch, Call_Tree_2_0_8.html,
> Call_Tree_John_Ross.html, Call_Tree_Wouter_Bancken.html,
> aries1565-profile.png, test-service-subsystem-4.0.2-SNAPSHOT.esa
>
>
> h4. Description
> Aries copies ESA archives to a temporary zip file during the installation
> phase. Afterwards, bundles are read directly from this temporary zip which
> has a large impact on the startup performance of Aries applications. By
> unpacking the esa artifact into the temporary folder it is unpacked only
> once. Subsequent reads for the bundles (jars) can be read directly from the
> folder.
> h4. Pull request
> https://github.com/apache/aries/compare/subsystem-2.0.x...WouterBanckenACA:io_performance_optimalisation?expand=1
> h4. Mailinglist
> http://mail-archives.apache.org/mod_mbox/aries-user/201606.mbox/%3CCAL5nZgTq5FxDvURJbzcEZ9YHx6vTs3HAOuFYDYA3ec9OZbmwjA%40mail.gmail.com%3E
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