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691 Commits (aa6902fcfc47112f82c49a968b673ccc8e0d0007)

Author SHA1 Message Date
Tyler Goodlet aa6902fcfc Add pre-stream open error conditions 2021-07-02 17:45:17 -04:00
Tyler Goodlet 477d0bc697 De-densify some code 2021-07-02 17:45:17 -04:00
Tyler Goodlet 9d302069f3 Always shield cancel the caller on cancel-causing-errors, add teardown logging 2021-07-02 17:45:17 -04:00
Tyler Goodlet d00e2ca573 First try: pack cancelled tracebacks and ship to caller 2021-07-02 17:45:17 -04:00
Tyler Goodlet 25679ae22d Add temp warning msg for context cancel call 2021-07-02 17:45:17 -04:00
Tyler Goodlet 2b3cb042c6 Add some brief todo notes on idea of shielded breakpoint 2021-07-02 17:45:17 -04:00
Tyler Goodlet 807c1d71a2 Consider relaying context error via raised-in-scope-nursery task 2021-07-02 17:45:17 -04:00
Tyler Goodlet a1603709ab Set stream "end of channel" after shielded check! 
Another face palm that was causing serious issues for code that is using
the `.shielded` feature..

Add a bunch more detailed comments for all this subtlety and hopefully
get it right once and for all. Also aggregated the `trio` errors that
should trigger closure inside `.aclose()`, hopefully that's right too.
 2021-07-02 11:59:12 -04:00
Tyler Goodlet 78b4eef7ee Don't clobber msg loop mem chan on rx stream close 
Revert this change since it really is poking at internals and doesn't
make a lot of sense. If the context is going to be cancelled then the
msg loop will tear down the feed memory channel when ready, we don't
need to be clobbering it and confusing the runtime machinery lol.
 2021-07-02 11:59:12 -04:00
Tyler Goodlet 211fb07074 Modernize streaming tests 2021-07-02 11:59:12 -04:00
Tyler Goodlet ae45b5ff1d Speedup the dynamic pubsub test 2021-07-02 11:59:12 -04:00
Tyler Goodlet c542b915d6 Add detailed ``@tractor.context`` cancellation/termination tests 2021-07-02 11:59:12 -04:00
Tyler Goodlet 6bd16749f0 Drop trailing comma 2021-07-02 11:59:12 -04:00
Tyler Goodlet 8f468a8c86 Adjustments for non-frozen context dataclass change 2021-07-02 11:59:12 -04:00
Tyler Goodlet 3fa36f64ac Wait for debugger lock task context termination 2021-07-02 11:59:12 -04:00
Tyler Goodlet be39ff38e4 Fix exception typing 2021-07-02 11:59:12 -04:00
Tyler Goodlet 9cd5d2d7b9 Explicitly formalize context/streaming teardown 
Add clear teardown semantics for `Context` such that the remote side
cancellation propagation happens only on error or if client code
explicitly requests it (either by exit flag to `Portal.open_context()`
or by manually calling `Context.cancel()`).  Add `Context.result()`
to wait on and capture the final result from a remote context function;
any lingering msg sequence will be consumed/discarded.

Changes in order to make this possible:
- pass the runtime msg loop's feeder receive channel in to the context
  on the calling (portal opening) side such that a final 'return' msg
  can be waited upon using `Context.result()` which delivers the final
  return value from the callee side `@tractor.context` async function.
- always await a final result from the target context function in
  `Portal.open_context()`'s `__aexit__()` if the context has not
  been (requested to be) cancelled by client code on block exit.
- add an internal `Context._cancel_called` for context "cancel
  requested" tracking (much like `trio`'s cancel scope).
- allow flagging a stream as terminated using an internal
  `._eoc` flag which will mark the stream as stopped for iteration.
- drop `StopAsyncIteration` catching in `.receive()`; it does
  nothing.
 2021-07-02 11:59:12 -04:00
Tyler Goodlet 4601c88574 Specially raise a `ContextCancelled` for a task-context rpc 2021-07-02 11:59:07 -04:00
Tyler Goodlet a1488a1773 Expose streaming components at top level 2021-07-02 11:58:45 -04:00
Tyler Goodlet e058506a00 Add a specially handled `ContextCancelled` error 2021-07-02 11:58:44 -04:00
Tyler Goodlet 19a23fefa9 Add a multi-task streaming test 2021-07-02 11:58:01 -04:00
Tyler Goodlet 40ad00ce02 Avoid mutate on iterate race 2021-07-02 11:58:01 -04:00
Tyler Goodlet b3caf846fc Only close recv chan if we get a ref 2021-07-02 11:58:01 -04:00
Tyler Goodlet 40cb3585c1 Add error case 2021-07-02 11:58:01 -04:00
Tyler Goodlet 88dbaff11b Support no arg to `Context.started()` like trio 2021-07-02 11:58:01 -04:00
Tyler Goodlet 3e34f0a374 Fix up var naming and typing 2021-07-02 11:58:01 -04:00
Tyler Goodlet 9e7bed646d Only send stop msg if not received from far end 2021-07-02 11:58:01 -04:00
Tyler Goodlet 0b73a4b61e Expose msg stream types at top level 2021-07-02 11:58:01 -04:00
Tyler Goodlet eb237f24cd Add dynamic pubsub test using new bidir stream apis 2021-07-02 11:58:01 -04:00
Tyler Goodlet 83f1e79fdd Use context for remote debugger locking 
A context is the natural fit (vs. a receive stream) for locking the root
proc's tty usage via it's `.started()` sync point. Simplify the
`_breakpoin()` routine to be a simple async func instead of all this
"returning a coroutine" stuff from before we decided that
`tractor.breakpoint()` must be async. Use `runtime` level for locking
logging making it easier to trace.
 2021-07-02 11:58:01 -04:00
Tyler Goodlet 1192541623 Be more pedantic with error handling 2021-07-02 11:58:01 -04:00
Tyler Goodlet 15b63b7190 Fix typing 2021-07-02 11:58:01 -04:00
Tyler Goodlet c4d5f9d41e Parametrize with async for style tests 2021-07-02 11:58:01 -04:00
Tyler Goodlet b7089bb4e0 Support passing `shield` at stream contruction 2021-07-02 11:58:01 -04:00
Tyler Goodlet ecb9655519 Add basic test set 2021-07-02 11:58:01 -04:00
Tyler Goodlet f98860a5e5 Cancel scope on stream consumer completion 2021-07-02 11:58:01 -04:00
Tyler Goodlet 8c8a236799 Expose `@context` decorator at top level 2021-07-02 11:58:01 -04:00
Tyler Goodlet 38ccbd0a9c Add initial bi-directional streaming 
This mostly adds the api described in
https://github.com/goodboy/tractor/issues/53#issuecomment-806258798

The first draft summary:
- formalize bidir steaming using the `trio.Channel` style interface
  which we derive as a `MsgStream` type.
- add `Portal.open_context()` which provides a `trio.Nursery.start()`
  remote task invocation style for setting up and tearing down tasks
  contexts in remote actors.
- add a distinct `'started'` message to the ipc protocol to facilitate
  `Context.start()` with a first return value.
- for our `ReceiveMsgStream` type, don't cancel the remote task in
  `.aclose()`; this is now done explicitly by the surrounding `Context`
   usage: `Context.cancel()`.
- streams in either direction still use a `'yield'` message keeping the
  proto mostly symmetric without having to worry about which side is the
  caller / portal opener.
- subtlety: only allow sending a `'stop'` message during a 2-way
  streaming context from `ReceiveStream.aclose()`, detailed comment
  with explanation is included.

Relates to #53
 2021-07-02 11:58:01 -04:00
Tyler Goodlet 85246d2df3 Benign deps reorg 2021-07-02 11:56:14 -04:00
Tyler Goodlet b372f4c92b Handle top level multierror that presents now? 2021-07-02 11:55:16 -04:00
Tyler Goodlet 32b4ae0603 Accept transport closed error during handshake and msg loop 2021-07-02 11:38:24 -04:00
Tyler Goodlet 80e100f818 Add our own "transport closed" signal 
This change some super old (and bad) code from the project's very early
days. For some redic reason i must have thought masking `trio`'s
internal stream / transport errors and a TCP EOF as `StopAsyncIteration`
somehow a good idea. The reality is you probably
want to know the difference between an unexpected transport error
and a simple EOF lol. This begins to resolve that by adding our own
special `TransportClosed` error to signal the "graceful" termination of
a channel's underlying transport. Oh, and this builds on the `msgspec`
integration which helped shed light on the core issues here B)
 2021-07-02 11:36:22 -04:00
Tyler Goodlet 44d7988204 New docs theme hotfix 2021-06-14 08:10:59 -04:00
goodboy e98302212a
Merge pull request #211 from goodboy/new_docs_polish 
New docs theme, readme actors rant.
 2021-06-14 07:33:02 -04:00
Tyler Goodlet 0301d105dd Better rant flow as per suggestions 2021-06-14 06:41:10 -04:00
Tyler Goodlet 4ee7db338d Fill out the rant a bit more 2021-06-14 06:31:16 -04:00
Tyler Goodlet 558d546c8f Bump readme for #210 2021-06-14 06:31:16 -04:00
Tyler Goodlet 5528a4eb45 Attempt configuring sphinx-book-theme 2021-06-14 06:31:16 -04:00
Tyler Goodlet fb23a9d8d4 Try out sphinx-book-theme 2021-06-14 06:31:16 -04:00
goodboy f48548ab94
Merge pull request #197 from goodboy/drop_run 
Drop run
 2021-05-07 12:02:23 -04:00