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From "Jarek Gawor (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (XBEAN-177) DelegatingBundle optimization
Date Thu, 07 Jul 2011 19:22:16 GMT

    [ https://issues.apache.org/jira/browse/XBEAN-177?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13061510#comment-13061510
] 

Jarek Gawor commented on XBEAN-177:
-----------------------------------

In revision 1143986 I updated the DelegatingBundle code to minimize the use of PackageAdmin
(one per call instead of one per bundle) as it started affecting performance when dealing
with a lot of bundles.


> DelegatingBundle optimization
> -----------------------------
>
>                 Key: XBEAN-177
>                 URL: https://issues.apache.org/jira/browse/XBEAN-177
>             Project: XBean
>          Issue Type: Improvement
>          Components: bundleutils
>    Affects Versions: 3.8
>            Reporter: Jarek Gawor
>            Assignee: Jarek Gawor
>             Fix For: 3.8
>
>
> DelegatingBundle forwards loadClass() (among other functions) to multiple bundles. Right
now the loadClass() implementation iterates over the bundles and attempts to load the class
from each bundle until the class is successfully loaded.
> This method can actually be harmful in certain situations for example with bundles with
DynamicImport-Package: *. It can needlessly establish a dynamic wired for the given package
on each bundle in the list. 
> One way to avoid this problem is to check (once CNFE is raised) if the given bundle is
wired to some bundle that exports the given package. If so, there is no need to check the
remaining bundles to load the class.

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