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https://issues.apache.org/jira/browse/PROTOCOLS-120?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16989542#comment-16989542
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Benoit Tellier commented on PROTOCOLS-120:
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https://github.com/linagora/james-project/pull/2965 proposes modularity for the
encoder chain
https://github.com/linagora/james-project/pull/2967 enhances modularity of the
decoder chain
These components would be ready for being pushed with minimal efforts into a
dependency injection system like Guice.
> Modularize IMAP propotocol
> --------------------------
>
> Key: PROTOCOLS-120
> URL: https://issues.apache.org/jira/browse/PROTOCOLS-120
> Project: James Protocols
> Issue Type: Improvement
> Components: imap
> Reporter: Benoit Tellier
> Assignee: Eric Charles
> Priority: Major
>
> # Context
> IMAP components relies on chaining. When we handle an item, be it in encoder,
> decoders or protocols, we have a chain of handlers (manually formed), and
> each handler see if it can handle the item, until one handler processes it.
> This approach have several caveats:
> - Chaining is done with an intermediate abstract class (verbose)
> - It is hard to add an element in the chain
> - Which is not easily customisable
> - This approach furthermore defeats injection frameworks.
> # Proposition
> Use a registery instead.
> Each handler indicates which class it handles.
> From the registry we can select directly the handler we want.
> # Consequence
> Handler no longer need to be chained together.
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