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https://issues.apache.org/jira/browse/DIRMINA-447?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Trustin Lee closed DIRMINA-447.
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Resolution: Fixed
Assignee: Trustin Lee
Now you can add multiple ExecutorFilters and ProtocolCodecFilters. Some
filters like SslFilter and CompressionFilter, that don't worth at all to add
multiple times, still have the restriction but I won't fix it because of
backward compatibility (i.e. public static attribute keys).
The following filter type, previously had the limitation, can be added more
than once now:
* ExecutorFilter - SEDA has been realized.
* ProtocolCodecFilter - Multi-layered codec has been realized.
Other most filters were already OK to be added multiple times, so we can safely
think this issue is fixed.
> Allow adding more than one IoFilters of the same type.
> ------------------------------------------------------
>
> Key: DIRMINA-447
> URL: https://issues.apache.org/jira/browse/DIRMINA-447
> Project: MINA
> Issue Type: Improvement
> Components: Core, Filter
> Reporter: Trustin Lee
> Assignee: Trustin Lee
> Fix For: 2.0.0-M1
>
>
> Currently, many existing filters such as ProtocolCodecFilter can't be added
> more than once to the same filter chain. It is because filters usually store
> its state information as a session attribute; adding more than one filters of
> the same type will mess their internal state.
> Therefore, users can't do something more complex like multi-layered protocol
> implementation.
> To resolve this issue, all filter implementations must create its session
> attribute key dynamically, instead of using a static key.
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