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From "David Jencks (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FELIX-3915) [DS] Timing hole between ComponentHolder initial config and registration
Date Mon, 25 Feb 2013 04:40:13 GMT

    [ https://issues.apache.org/jira/browse/FELIX-3915?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13585619#comment-13585619
] 

David Jencks commented on FELIX-3915:
-------------------------------------

Previous commit still has a timing hole, although it's small.  Patch has a way to use the
R5 getChangeCount to eliminate the hole, and uses pretty much the same idea as r 1449401 for
R4.  I can't find a R5 compendium in maven right now, so I'm using reflection.  Hoping to
improve things...
                
> [DS] Timing hole between ComponentHolder initial config and registration
> ------------------------------------------------------------------------
>
>                 Key: FELIX-3915
>                 URL: https://issues.apache.org/jira/browse/FELIX-3915
>             Project: Felix
>          Issue Type: Bug
>          Components: Declarative Services (SCR)
>    Affects Versions: scr-1.8.0
>            Reporter: David Jencks
>            Assignee: David Jencks
>             Fix For: scr-1.8.0
>
>
> Right now when we create a component holder we first try to configure it with any existing
configurations and then register it to obtain configuration events for it's pid.  Thus there
is a timing hole after the query for existing configurations and before the registration when
configuration events will be dropped.
> I'm doing the initial configuration after adding the holder to the by-pid map.  Instead
of missing the configuration entirely, it will be possible that the component would get configured
twice.  I don't think this can cause any harm.

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