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https://issues.apache.org/jira/browse/LUCENE-6508?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14563793#comment-14563793
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Uwe Schindler commented on LUCENE-6508:
---------------------------------------
In LockFactory we need the following: BasDirectory.makeLock() currently
delegates directly to the LockFactory (its a final method). So we should rename
this method in LockFactory, too and make it return a lock only after aquire.
Therefore, the LockFactory would do what Robert proposed. Otherwise I like the
proposal. I will work the next days on it (I already started to rename some
stuff).
The lock cannot be completely immutable. Because the Closeable interface should
still be implemented correctly: close() must be idempotent, so we still need
the state. But it is immutable in that sense that you cannot re-obtain the lock.
> Simplify Directory/lock api
> ---------------------------
>
> Key: LUCENE-6508
> URL: https://issues.apache.org/jira/browse/LUCENE-6508
> Project: Lucene - Core
> Issue Type: Bug
> Reporter: Robert Muir
> Assignee: Uwe Schindler
>
> See LUCENE-6507 for some background. In general it would be great if you can
> just acquire an immutable lock (or you get a failure) and then you close that
> to release it.
> Today the API might be too much for what is needed by IW.
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