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https://issues.apache.org/jira/browse/CAY-2351?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16134948#comment-16134948
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ASF GitHub Bot commented on CAY-2351:
-------------------------------------
Github user asfgit closed the pull request at:
https://github.com/apache/cayenne/pull/239
> Remove commons-collections usage completely
> -------------------------------------------
>
> Key: CAY-2351
> URL: https://issues.apache.org/jira/browse/CAY-2351
> Project: Cayenne
> Issue Type: Improvement
> Components: Core Library
> Affects Versions: 4.1.M1
> Reporter: Nikita Timofeev
> Assignee: Nikita Timofeev
> Fix For: 4.1.M1
>
>
> This task is final part of effort of removing all external dependencies from
> *cayenne-server*.
> *Why to do so*:
> * keeping cayenne free of outer dependencies will allow easier integration of
> Cayenne in projects, reducing issues in case of dependencies incompatibilities
> * most of commons-collections code used by Cayenne can be replaced by plain
> java (this will require Java 8) so it will be easier to maintain
> * commons-collections v3.2.1 used now have security vulnerabilities (see this
> [issue|https://issues.apache.org/jira/browse/COLLECTIONS-580])
> *Negative impact*
> Cayenne use some tricky collections from that lib now and will require to
> deal with their replacement
> Those collections are:
> - {{LRUMap}} this will be seamlessly replaced by already used
> {{ConcurrentLinkedHashMap}}
> - {{CompositeCollection}} this will be copied into Cayenne code base as it
> has almost no dependencies and relatively small
> - {{ReferenceMap}} this should be implemented by Cayenne as copying this will
> lead to copying significant part of commons-collections code base, luckily
> Cayenne actually use only two variants of this map: strong keys + weak values
> and strong keys + soft values.
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