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From Michael Dürig (JIRA) <j...@apache.org>
Subject [jira] [Commented] (OAK-153) Split the CommitHook interface
Date Fri, 29 Jun 2012 07:22:42 GMT

    [ https://issues.apache.org/jira/browse/OAK-153?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13403747#comment-13403747
] 

Michael Dürig commented on OAK-153:
-----------------------------------

Yet to be fixed:
* revision 1354071 removed the call to the after commit hook KernelNodeStoreBranch. See also
OAK-157
* revision 1354045 removed the after commit hook tests in KernelNodeStoreTest
                
> Split the CommitHook interface
> ------------------------------
>
>                 Key: OAK-153
>                 URL: https://issues.apache.org/jira/browse/OAK-153
>             Project: Jackrabbit Oak
>          Issue Type: Improvement
>          Components: core
>            Reporter: Jukka Zitting
>            Assignee: Jukka Zitting
>
> The {{CommitHook}} interface has two methods, {{beforeCommit()}} and {{afterCommit()}},
since the symmetry originally seemed like a good idea. However, in practice these methods
are not really so symmetric after all.
> For example, unlike {{afterCommit()}} the {{beforeCommit()}} method may end up being
called multiple times for a given changeset if it needs to be repeatedly rebased or otherwise
revised before it can be committed. There isn't even any guarantee that a particular changeset
on which {{beforeCommit()}} has been called ever gets committed. And on the other hand there
are good reasons to avoid calling {{afterCommit()}} on each and every commit that has been
made. Instead it could be called only every now and then to cover larger sets of changes.
> Thus I'd like to split the {{CommitHook}} interface to two parts that I'd tentatively
call {{CommitEditor}} and {{Observer}}.

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