[Tutor] Threaded persistance?

[Gwyn Evans]

Hi,
  New to Python, but with Java background  I'm interested in
comments/suggestions for something I'm trying...

  I've got a series of events (basically a dictionary of a few
key:value pairs) which I'd like to forward onto a web service.  That
should be no problem, but I'm investigating what I can do when the web
service is down for a bit.
  What I'm considering is to persist the event and trigger a seperate
thread to retry the forwarding.  What I'm wondering about is if
there's a storage method that allows 1 thread writing to the storage
while the other thread reads and then deletes from the storage...

I had a look at using ZODB but hit problems when trying to have two
connections to the same FileStorage DB, but a second look at things
suggested that dbm might well do what I need, if  I ensure only one
thread at a time can access it.

/Gwyn