From: Peter Mount <peter@retep.org.uk>
Reply-To: peter@retep.org.uk
Organization: retep org
To: Jeff MacDonald <jeff@hub.org>, Jeff MacDonald <jeff@hub.org>,
	pgsql-interfaces@postgresql.org
Subject: Re: [INTERFACES] Java
Date: Tue, 7 Sep 1999 22:07:30 +0100
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References: <Pine.LNX.4.10.9909071435240.1772-100000@penguin.hub.org>
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Message-Id: <9909072216510M.00229@tabatha>
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On Tue, 07 Sep 1999, Jeff MacDonald wrote:
> This question was sent to me, and i'm wondering if it's viable
> or if anyone else has any interest in it ?
> 
> ++++++++++++++++
> 
> Have you any plans to make possible writing simple functions/stored
> procedures in Java to extend PostgreSQL ?
> 
> ++++++++++++++++
> 
> Now my question related to this, if i understand correctly
> this would mean we would need the java runtime thingy in Postgres
> and would seriously wreck our speed . Right ?

I remember writing something some months ago (check the archives) of a possible
way around this.

IIRC, I seem to remember thinking along the lines of a single JVM thats run by
the Postmaster, and when a backend calls a stored procedure thats in Java, the
first call creates a new Thread/ThreadGroup in the JVM, and any call from that
backend goes to that thread using a simple set of Interface's.

When the backend closes, the ThreadGroup is killed off.

I think that's what I originally posted, but it would take someone with a lot
of time and JNI experience to pull it off.

Peter

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