[squeak-dev] Magma and shared sessions.

Brett Kosinski fancypantalons at gmail.com
Thu Mar 27 13:32:21 UTC 2008

So I'm building an application that's composed of two parts:

1. A Magma-backed Seaside web application.
2. A custom TCP/IP protocol server which accesses the same Magma
database as the web application.

Now, as of right now I have an extremely simple Seaside app built that
is backed by Magma (using an MaSharedSessionAuto session object) and
works well enough.  Meanwhile, I've completed the first cut of the TCP
server by subclassing TcpService and going from there.  But I'm
unclear on how to properly access the database from the TcpService
(since both the Seaside app and the service need share a single

My first approach was to instantiate a new MaSharedSessionAuto
instance inside my service class for each call to serve:.
Unfortunately, instantiating a session instance and connecting to the
database appears to take a non-trivial amount of time, so that proved

My second, and current, approach is to instantiate a single
MaSharedSessionAuto instance when the service is first initialized.
Then, each call to serve: makes use of the same session instance.

So, fundamentally, I guess I'm wondering if this the right way to do
things.  Each call to serve: is handled in a separate Process, and I'm
unclear if it's safe to access an MaSharedSessionAuto instance from
multiple threads (I'm assuming Seaside handles things a little
differently, since sessions are long-lived things in that world,
unlike my TCP service, which deals with short, sporadic, independant
request/response pairs).  Furthermore, do I have to do anything
special to ensure consistency between the TCP service and the Seaside


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