Noel wrote:

> Do you mean like the virtual user table?

Yeah Noel, like that.
And before you say anything, I *know* that v. few mailet developers will
want to deliver more than one kind of persistence.

But I'd tend to favour us enforcing a degree of seperation between
interface and implementation in all our interactions with persistent
storage so that we retain, on behalf of our users,  the option to develop
alternative persistence for any data set, and the right of
deployers/sysadmins to select the most appropriate persistence for their
installation.

Otherwise we'll end up with a choice for the major data sets (mail & users)
but compel users to install and administer a db (or re-write someones
mailets) if they want bayseian analysis of spam or virtuser or dynamic
mailinglists.

Virtuser should declare a repository interface, implement that in one or
more ways, and deploy  (currently in Avalon ways, soon to JNDI) the version
chosen by configuration.

I'm not "going off on one" about this, its only a niggle. Like a grain of
sand to an oyster....  ;-)

The simple alternative is to standardise on a single type of storage,
filesystem or db and offer the other(s) as special extensions. Meaning that
James would be db out-of-the-box and could be configured to use filesystem
for some things only.

The more elaborate alternative is to standardise on db but embed a db which
would use the local filesystem.
That way the change from local filesystem to network db is only as hard as
editing the jdbc url (and in practice a million other things which don't
really count in a sweeping generalisation ;-).

Just my 2c though.

d.






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