[Zope] Accessing Zope DA connection from external method

[Chui Tey]

Jpenny wrote a little how-to about accessing ZSQL Method from External
Method. This has really whetted my appetite.

At the moment, my external methods create and destroy their connections
to the database whenever they are called. This can potentially be
expensive when scaling up.

Can anyone point out how do I reference a Zope DA Connection from an
external method. This way I can make use of an existing open connection
instead.

Thanks in advance

Chui