Commit Graph

919 Commits (9da1abeecd458160c0842d0884b05187ecd104ea)

Author SHA1 Message Date
Tyler Goodlet 56d3f6cffb Add a working arbiter registry system
Every actor now registers (and unregisters) with the arbiter at
startup/teardown. For now the registry is stored in a plain `dict` in
the arbiter's memory. This makes it possible to easily coordinate actors
started as plain Python processes or via `multiprocessing`.

A whole smörgåsbord of changes was required to accomplish this:
- factor handshake steps into a func
- track *every* channel connected to an actor including multiples to the
  same remote peer (may want to optimize this later)
- handle `trio.ClosedStreamError` gracefully in the message loop
- add an `open_portal` asynccontextmanager which handles channel
  creation, handshaking, and spawning a bg task for msg processing
- add a `start_actor()` for starting in-process actors directly
- add working `get_arbiter()` and `find_actor()` public routines
- `_main` now tries an anonymous channel connect to the stated
  arbiter sockaddr and uses that to determine whether to crown itself
2018-07-05 16:21:55 -04:00
Tyler Goodlet bf08310224 Add StreamQueue.connected() 2018-07-05 16:21:55 -04:00
Tyler Goodlet 82f22b76e5 Arbiter now supports non-empty statespace 2018-07-05 16:21:55 -04:00
Tyler Goodlet fa6f8185b6 Handle kb interrupt gracefully in sub-actors
Fail gracefully (by "aborting") the same way `trio` does. This avoids
ugly sub-proc tracebacks thrown at the console. Unset the local actor
when `tractor._main` completes. Cancel all tasks for a peer channel on
disconnect.
2018-07-05 16:21:55 -04:00
Tyler Goodlet 0aa49dcbdf Support re-entrant calls to `get_arbiter()`
It gets called more then once when using `tractor.run()` and
then `find_actor()`. Also, allow passing in the log level to each
new spawned subactor.
2018-07-05 16:21:55 -04:00
Tyler Goodlet 597546cf7b Drop console logging - messes with other tests 2018-07-05 16:21:55 -04:00
Tyler Goodlet 97865a192a Add an actor spawning test
Test that the actor nursery API and ``tractor.run`` entrypoint work when
the sub-actor's main task is all that is run (i.e. no rpc requests).
2018-07-05 16:21:55 -04:00
Tyler Goodlet e9422fa001 Fix actor nursery __exit__ handling
When an error is raised inside a nursery block (in the local actor)
cancel all spawned children and ensure the error is properly
unsuppressed.

Also,
- change `invoke_cmd` to `send_cmd` and expect the caller to use
  `result_from_q` (avoids implicit blocking for responses that might
  never arrive)
- `nursery.start()` the channel server block such that we wait for the
  underlying listener to spawn before making outbound connections
- cancel the channel server when an actor's main task completes
  (given that `outlive_main == False`)
- raise subactor errors directly in the local actors's msg loop
- enforce that `treat_as_gen` async functions respond with a caller id
  (`cid`) in each yield packet
2018-07-05 16:21:55 -04:00
Tyler Goodlet 2c637db5b7 Add reliable subactor lifetime control 2018-07-05 16:21:55 -04:00
Tyler Goodlet 5c70b4824f Add remote actor error handling and parent re-raising
Command requests are sent out and responses are handled in a "message
loop" where each command is associated with a "caller id" and multiple
cmds and results are multiplexed on the came inter-actor channel. When
a cmd result arrives it is pushed into a local queue and delivered to the
appropriate calling actor's task. Errors from a remote actor are always shipped
in an "error" packet back to their spawning-parent actor such that any error
in a subactor is always raised directly in the parent. Based on the
first response to a cmd (either a 'return' or 'yield' packet) the caller
side portal will retrieve values by wrapping the local response queue in
either of an async function or generator as appropriate.
2018-07-05 16:21:55 -04:00
Tyler Goodlet 4eb014aedc Use trace level for packet contents 2018-07-05 16:21:55 -04:00
Tyler Goodlet bed7e240de Add uid,event attrs to `Channel` 2018-07-05 16:21:55 -04:00
Tyler Goodlet 2e9cbec93c Add a basic `tractor.run()` test 2018-07-05 16:21:55 -04:00
Tyler Goodlet f36bd0f188 Uhhh make everything better 2018-07-05 16:21:55 -04:00
Tyler Goodlet 03c57ceece Add an initial `tractor` price streaming test 2018-07-05 16:21:55 -04:00
Tyler Goodlet 88e176ceff Add a very rough, minimal actor model system
I'm calling it `tractor` (as in trio-actor) for now.
Lots of work to do still as per the many comments!

Relates to #27
2018-07-05 16:21:55 -04:00
Tyler Goodlet 01119545fc IPC primitives improvements
- Rename the `Client` to `Channel`
- Add better `__repr__()`
- use laddr, raddr instead of sockaddr, peer
- don't allow re-entrant `Channel.connect()` calls
- Make `Channel` an async iterable
2018-07-05 16:21:55 -04:00
Tyler Goodlet 968c385c35 Move ipc types into separate module 2018-07-05 16:21:55 -04:00
goodboy 183c14ba79
Initial commit 2018-07-05 16:01:15 -04:00