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From "Phil Steitz (JIRA)" <j...@apache.org>
Subject [jira] Updated: (POOL-159) GenericObjectPool: Add a getNumWaiters() method for monitoring purposes
Date Sun, 06 Jun 2010 19:42:56 GMT

     [ https://issues.apache.org/jira/browse/POOL-159?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Phil Steitz updated POOL-159:
-----------------------------

    Fix Version/s: 2.0
                       (was: 1.5.5)

I think this is a reasonable feature request and the suggested implementation will be fairly
accurate.  I would prefer to hold off adding this until 2.0 though, as it is an API contract
extension and we may want to specify the contract differently if the underlying pool implementation
changes (which is likely).

> GenericObjectPool: Add a getNumWaiters() method for monitoring purposes
> -----------------------------------------------------------------------
>
>                 Key: POOL-159
>                 URL: https://issues.apache.org/jira/browse/POOL-159
>             Project: Commons Pool
>          Issue Type: Improvement
>    Affects Versions: 1.5, 1.5.1, 1.5.2, 1.5.3, 1.5.4
>            Reporter: Mike Muller
>             Fix For: 2.0
>
>
> I would like to be able to determine the number of threads waiting to obtain an object
from the pool for monitoring purposes.  This would be most applicable when the WHEN_EXHAUSTED_BLOCK
option is used.  I propose the following method:
>     /**
>      * Return the number of threads currently waiting for an object from this pool.
>      *
>      * @return the number of threads currently waiting for an object from this pool
>      */
>     public synchronized int getNumWaiters() {
>         return _allocateQueue.size();
>     }

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