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From "Andy Schwartz (JIRA)" <>
Subject [jira] Commented: (TRINIDAD-2055) Introduce ChangeManager wrapper class
Date Fri, 11 Mar 2011 15:47:59 GMT


Andy Schwartz commented on TRINIDAD-2055:

Committed to

> Introduce ChangeManager wrapper class
> -------------------------------------
>                 Key: TRINIDAD-2055
>                 URL:
>             Project: MyFaces Trinidad
>          Issue Type: Improvement
>    Affects Versions: 2.0.0-beta-2
>            Reporter: Andy Schwartz
>            Assignee: Andy Schwartz
>            Priority: Minor
>             Fix For: 2.0.0-beta-3
>         Attachments:
> One way that users might customize change management behavior is to create a proxy ChangeManager
that delegates through to an underlying ChangeManager (eg. to SessionChangeManager) for most
operations after performing filtering of the incoming changes.  It is possible to implement
such proxy ChangeManager classes today.  However, without a wrapper base class, these implementations
are fragile - ie. they will break if we ever introduce a new method to the ChangeManager API.
> A more robust solution would be to introduce a base wrapper class for proxy ChangeManager
implementations to extend.  That way, in the event that we do introduce new ChangeManager
methods, the base wrapper class can be updated in parallel, protecting subclasses from the

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