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From "Alasdair Nottingham (JIRA)" <j...@apache.org>
Subject [jira] Work started: (ARIES-338) osgi:service JNDI damping performs like a one legged dog under an anesthetic
Date Tue, 15 Jun 2010 12:47:23 GMT

     [ https://issues.apache.org/jira/browse/ARIES-338?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Work on ARIES-338 started by Alasdair Nottingham.

> osgi:service JNDI damping performs like a one legged dog under an anesthetic
> ----------------------------------------------------------------------------
>
>                 Key: ARIES-338
>                 URL: https://issues.apache.org/jira/browse/ARIES-338
>             Project: Aries
>          Issue Type: Bug
>          Components: JNDI
>    Affects Versions: 0.1
>            Reporter: Alasdair Nottingham
>            Assignee: Alasdair Nottingham
>             Fix For: 0.2
>
>
> I updated some of my code to use the JNDI implementation of osgi:service which does the
service damping and my application saw a 3x slowdown (i.e. it took 3 second to do something
it used to take 1 seconds).
> It appears the problem is that every time a lookup is performed a new java.lang.reflect.Proxy
class is generated and doing this over and over when the same service is looked up is expensive.
Instead of doing this we can generate a proxy once per client BundleContext per service and
cache it between lookups. The cache needs to be managed, so if the client goes away we clear
the cache and if the service goes away we purge it too.
> I have written the code and shown that it improves performance so I'm raising this JIRA
so I can integrate the performance fix.

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