[jira] [Updated] (OAK-2755) Consolidated JMX view of all EventListener related statistics

["Chetan Mehrotra (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/OAK-2755?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Chetan Mehrotra updated OAK-2755:
---------------------------------
    Attachment: consolidated-listener-stats.png

> Consolidated JMX view of all EventListener related statistics
> -------------------------------------------------------------
>
>                 Key: OAK-2755
>                 URL: https://issues.apache.org/jira/browse/OAK-2755
>             Project: Jackrabbit Oak
>          Issue Type: Improvement
>          Components: core
>            Reporter: Chetan Mehrotra
>            Assignee: Chetan Mehrotra
>              Labels: monitoring, observation
>             Fix For: 1.0.13, 1.3.0
>
>         Attachments: consolidated-listener-stats.png
>
>
> Oak Observation support exposes a {{EventListenerMBean}} [1] which provide quite a bit of details around registered observation listeners. However in a typical application there would be multiple listeners registered. To simplify monitoring it would be helpful to have a _consolidated_ view of all listeners related statistics.
> Further the stats can also include some more details which are Oak specific
> * Subtree paths to which the listener listens to - By default JCR Api allows single path however Oak allows a listener to register to multiple paths
> * If listener is enabled to listen to cluster local and cluster external changes
> * Size of queue in BackgroundObserver
> * Distribution of change types present in the queue - Local, External etc
> [1] https://github.com/apache/jackrabbit/blob/trunk/jackrabbit-api/src/main/java/org/apache/jackrabbit/api/jmx/EventListenerMBean.java



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