best way to implement producer/consumer in Perl

I've got an application that creates work and posts the work requests
to a table. Each work request is just a single row in the table.
I've also got two systems that do the work based on the requests in
the table.

It seems that ideally, I could use the LISTEN/NOTIFY features to tell
the consumers when there is work. However, what I really need is a
blocking LISTEN. That is, it just sits there until it gets a NOTIFY.

Right now, the consumer checks for work every so often, and most of
the time finds none.

What's the best way to implement such a thing in Perl? Is there a
blocking LISTEN?

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Vivek Khera, Ph.D. Khera Communications, Inc.
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