[infinispan-issues] [JBoss JIRA] (ISPN-3640) Extend KeyFilter facility to the whole cache

[Sanne Grinovero (JIRA)]

    [ https://issues.jboss.org/browse/ISPN-3640?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12952595#comment-12952595 ] 

Sanne Grinovero commented on ISPN-3640:
---------------------------------------

True, but my understanding is that this is just a syntactic sugar trick for a better API, not necessarily implying a performance improvement.

Of course would be great to take advantage of it ;-) but I'd do that in a second step? (assuming we get some ideas?)
                
> Extend KeyFilter facility to the whole cache
> --------------------------------------------
>
>                 Key: ISPN-3640
>                 URL: https://issues.jboss.org/browse/ISPN-3640
>             Project: Infinispan
>          Issue Type: Feature Request
>          Components: Core
>    Affects Versions: 6.0.0.CR1
>            Reporter: Paul Ferraro
>            Assignee: Mircea Markus
>
> The key filter facility is very convenient for users who have multiple key types in the same cache.  It would be very handy if this feature were extended to the whole cache.
> e.g.
> Cache<?, ?> cache = ...;
> KeyFilter filter = ...;
> Cache<K, V> view = cache.filter(filter);
> view.addListener(listener) // Equivalent to the current cache.addListener(listener, filter) method
> for (Map.Entry<K, V> entry: view.entrySet()) {
>    ...
> }

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