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Date: Wed, 9 Oct 2013 14:02:41 +0000 (UTC)
From: "Stefan Bodewig (JIRA)" <jira@apache.org>
To: log4net-dev@logging.apache.org
Message-ID: <JIRA.12672635.1381160019557.38456.1381327361766@arcas>
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Subject: [jira] [Commented] (LOG4NET-397) Conflicts due to new strong name
 key
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    [ https://issues.apache.org/jira/browse/LOG4NET-397?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13790367#comment-13790367 ] 

Stefan Bodewig commented on LOG4NET-397:
----------------------------------------

http://svn.apache.org/viewvc/logging/log4net/trunk/src/site/xdoc/release/faq.xml?r1=1530611&r2=1530610&pathrev=1530611 - will be published soon.

> Conflicts due to new strong name key
> ------------------------------------
>
>                 Key: LOG4NET-397
>                 URL: https://issues.apache.org/jira/browse/LOG4NET-397
>             Project: Log4net
>          Issue Type: Bug
>            Reporter: Joe
>
> Consider an application that uses two third-party assemblies:
> - AssemblyA from Supplier A, compiled with log4net 1.2.10 (old strong-name key)
> - AssemblyB from Supplier B, compiled with log4net 1.2.11 (new strong-name key)
> How can I make these two assemblies co-exist and use the same version of log4net?
> Maybe I'm missing something obvious, but I can't see any way to do this: for example I obviously can't have both log4net assemblies in the same bin folder, as they have the same name.
> I'm obviously not the only one who thinks there's a problem, e.g. issue LOG4NET-324 refers to "... the strong name horror too".  The comment on this issue:
> "... But if you need the old "strong name", you can simply use the "oldkey" binaries. I can't see how this is a horror, but of course I'm biased."
> doesn't seem to address the problem of conflicts.
> Also there are no guidelines for component suppliers as to which version to use, which increases the risk of conflicts.  In the absence of explicit guidelines, I guess legacy components will have the old key, whereas new ones will tend to use the new key, since that is the only version available via NuGet.
> The only solution I can see is the following:
> - The "new key" assembly needs to have a different name from the "old key" assembly (e.g. log4net-2.dll).
> - Use Type forwarding to enable both versions to co-exist.  E.g. you could supply a special log4net.dll signed with the old key that uses type forwarding to forward to log4net-2.dll signed with the new key.  Or vice-versa.


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