[infinispan-issues] [JBoss JIRA] (ISPN-3604) Provide JMX operation which shows the numberOfEntries in the entire dist-cache

[Duncan Doyle (JIRA)]

    [ https://issues.jboss.org/browse/ISPN-3604?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12813129#comment-12813129 ] 

Duncan Doyle commented on ISPN-3604:
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Also, cache.keySet() only returns the entire keySet when using the HotRod client. When using an embedded cache, it only returns the entries in memory of that specific node. Furthermore, it does not return the keys of the entries stored in the CacheStore.

So, it seems we need to implement the JMX operation that same way as HotRod does it: use the ISPN Map/Reduce functionality.
                
> Provide JMX operation which shows the numberOfEntries in the entire dist-cache
> ------------------------------------------------------------------------------
>
>                 Key: ISPN-3604
>                 URL: https://issues.jboss.org/browse/ISPN-3604
>             Project: Infinispan
>          Issue Type: Feature Request
>          Components: JMX, reporting and management
>    Affects Versions: 6.0.0.CR1
>         Environment: Max OS-X 10.8.5, Oracle Hotspot 1.7.0_40, Infinispan 5.2.4.Final
>            Reporter: Duncan Doyle
>            Assignee: Mircea Markus
>
> The Infinispan statistics component only shows the 'numberOfEntries' in a particular node, including entries of which the node is not the primary owner (basically, doing a sum of this value of all the cluster members gives you (numberOfEntries * numOwners). The 'cache.keySet()' method does return the entire keyset, and thus you can calculate the numberOfEntries in the cache, but this requires writing custom code in a cache client. It would be nice if Infinispan would provide a JMX operation which is able to show the number of entries in the entire dist-cache cluster.

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