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From "Ersin Er" <>
Subject Re: [ApacheDS] Cost of interceptors
Date Mon, 28 May 2007 08:25:27 GMT

I recommend to implement a new base interceptor which can execute
multiple interceptors inside itself. If I am not wrong, Spring
framework uses this scheme for Servlet filters. They have a filter
implementation which can run multiple interceptors sharing same some
common context. This scheme may have various advantages. If for
example Kerberos service is disabled only one interceptors needs to
check the service status and other interceptors need not even wake up.
It also groups common services which do not make sense individually
into one common place.

On 5/28/07, Alex Karasulu <> wrote:
> Hi Emmanuel,
> Enrique is adding 2-3 new interceptors into the core.  I guess they could be
> conditionally added in the configuration based on the presence of the
> kerberos service or whatever service needed them.  Hmmm me thinks this is a
> good example of how services can use the add/remove capabilities on the
> interceptor chain.  Regardless I was wondering what the costs are on going
> through these interceptor call chains.  I remember you did some metrics
> around this and found that it does not cost much at all.
> Alex


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