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From "John Casey (JIRA)" <j...@codehaus.org>
Subject [jira] Updated: (MNG-3379) Parallel resolution of artifacts
Date Mon, 09 Feb 2009 15:33:20 GMT

     [ http://jira.codehaus.org/browse/MNG-3379?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

John Casey updated MNG-3379:
----------------------------

    Fix Version/s:     (was: 2.1.0-M4)
                   2.1.0-M2

Starting consolidation of all 2.1.0-M* versions into 2.1.0-M1, which I'll then rename into
2.1.0

> Parallel resolution of artifacts
> --------------------------------
>
>                 Key: MNG-3379
>                 URL: http://jira.codehaus.org/browse/MNG-3379
>             Project: Maven 2
>          Issue Type: New Feature
>          Components: Artifacts and Repositories
>    Affects Versions: 2.0.8
>            Reporter: Don Brown
>            Assignee: Brett Porter
>             Fix For: 2.1.0-M2
>
>         Attachments: parallel-resolution-2.diff, parallel-resolution-3.diff, parallel-resolution.diff
>
>
> Artifacts should be resolved in parallel, grouped by group id's to get around the lack
of synchronization in the local repository.  The patch does the following:
> * Use a ThreadPoolExecutor to parallelize artifact resolution, but takes care not to
resolve multiple artifacts from the same group id simultaneously. (requires Java 5)
> * Makes the http wagon the default instead of the poor performing http-client
> Disadvantages: 
> * Requires Java 5, but the backport jars could be substituted pretty easily
> * Breaks some plugins due to commons-logging being in the Maven uber jar (required by
commons-httpclient), notably the apt plugin (maybe more should use the isolatedRealm setting?)
> * Screws up the progress monitor as multiple threads are updating it
> Advantages:
> * Much faster when combined with the http wagon (WAGON-98).  I was seeing 40% improvement
on some test builds.

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