This counts the number of "standalone" mailboxes we create, which
happens when a client does open() without first using a nameplate. The
current client doesn't do this, but future clients might.
This moves responsibility for the periodic prune-everything Timer up to
RelayServer too. That way we can be sure the stats are dumped
immediately after prune, and we can incorporate stats from Transit as
well.
The new approach runs every 10 minutes and keeps a
nameplate/mailbox/messages "channel" alive if the mailbox has been
updated within 11 minutes, or if there has been an attached listener
within that time.
Also remove the "nameplates.updated" column. Now we only track "updated"
timestamps on the "mailboxes" table, and a new mailbox will preserve any
attached nameplate.
Unless/until people start writing new applications (with different
app-ids), this code is unlikely to get used very much, and the code is
simpler without it.
I changed my mind, it's actually easier if 'wormhole-server stop' (and
'restart') does *not* throw an error when there wasn't already a server
running in that directory. Specifically that lets me use 'restart' as an
idempotent "make sure a server is running" command.
This adds a test for database upgrades, which I developed on a branch
that added a new DB schema (v3) and an upgrader to match, but then I
changed my mind about the schema and removed that part. The test will be
useful some time in the future when I change the schema in a small
enough way that I bother to write an upgrader for the change. For now,
the test is disabled.
In addition, the upgrader test is kind of lame. I'd really prefer to
assert that the upgraded schema is identical to the schema of a
brand-new (latest-version) database, but ALTER TABLE doesn't quite work
that way (comments are omitted, and the order of the columns is slightly
different).
This also adds database.dump_db() for the tests.
There was some vestigal server-cli code (leftover in the client-side
wormhole.cli.cli_args) that used port 3000/3001, and it accidentally got
used for the new Click-based parser, rather than the actual server-cli
code (in wormhole.server.cli_args) that uses port 4000/4001. This
changes the port numbers to match (everything uses 4000/4001 these days,
to avoid confusing interactions with the old 0.7.6 server that might
still be listening on the old ports).
With increased usage, I'm seeing a buildup of stale channels. Since the
channels aren't properly ephemeral yet (where they get closed as soon as
the last subscriber disconnects), clients which terminate without
calling close() tend to leave the channel lying around. We don't have
"persistent wormholes" yet, so channels should be much more ephemeral
than they currently are.
The reasoning is that this string is only ever likely to refer to the
version of the primary/initial client (the CLI application, written in
Python, that you get with "pip install magic-wormhole"). When there are
other implementations, with unrelated versions, they should obviously
not pay attention to a warning about the other implementation being out
of date.
This will be useful for the upcoming "persistent wormhole" mode. A
client might send an allocation request, crash/terminate before
receiving a response, then restart, then re-send the request. If the
server sees a request with the same request_id a previous request, it
can return the same nameplate.
We'll need code changes on both sides to support this (nothing sends or
checks request_id yet), but this lands the schema change early to reduce
future disruption.
