369 lines
12 KiB
Python
369 lines
12 KiB
Python
"""Peer-backed session transport for one hosted-room member task.
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This adapter implements :class:`InternalSessionRPC` without using canonical
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Bot Chat. The remote client must resolve a hidden ``Group: <room_id>`` session
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with ``source=bot_room`` and verify the scoped grant at admission.
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"""
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from __future__ import annotations
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import hashlib
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import time
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import uuid
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from collections.abc import Callable, Mapping, Sequence
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from dataclasses import dataclass
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from typing import Any, Protocol
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from gateway.hosted_room_driver import TaskIdentity
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from gateway.hosted_room_peer import HostedMemberDispatch, PROTOCOL_VERSION
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from tui_gateway.hosted_room_driver import (
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ROOM_SESSION_SOURCE,
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HostedRoomBinding,
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InternalSessionRPC,
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room_session_title,
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)
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class HostedRoomPeerClient(Protocol):
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"""Authenticated client for a target gateway's narrow room-member API."""
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def bind_room_scope(self, **scope: Any) -> None: ...
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def prepare(
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self,
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*,
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room_id: str,
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profile: str,
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source: str,
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grant: str,
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create: bool,
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expected_session_id: str | None = None,
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) -> Mapping[str, Any] | None: ...
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def dispatch(
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self,
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*,
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dispatch: Mapping[str, Any],
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grant: str,
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) -> Mapping[str, Any]: ...
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def history(
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self,
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*,
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room_id: str,
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profile: str,
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session_id: str,
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grant: str,
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) -> Sequence[Mapping[str, Any]]: ...
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def status(
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self,
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*,
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room_id: str,
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profile: str,
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session_id: str,
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grant: str,
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) -> Mapping[str, Any]: ...
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def stop(
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self,
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*,
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dispatch: Mapping[str, Any],
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grant: str,
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) -> Mapping[str, Any] | None: ...
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def stop_receipt(
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self,
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*,
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task_id: str,
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execution_generation: int,
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grant: str,
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) -> Mapping[str, Any] | None: ...
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@dataclass(frozen=True)
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class RoomLinkCandidate:
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"""One address/provider for the same authenticated target gateway."""
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name: str
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mode: str
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target_install_id: str
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client: HostedRoomPeerClient
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class FailoverHostedRoomPeerClient:
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"""Try alternate links without changing target or logical task identity."""
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def __init__(
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self,
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candidates: Sequence[RoomLinkCandidate],
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*,
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reprobe_interval_seconds: float = 60,
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clock: Callable[[], float] = time.monotonic,
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) -> None:
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if not candidates:
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raise ValueError("at least one RoomLink candidate is required")
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targets = {candidate.target_install_id for candidate in candidates}
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if len(targets) != 1:
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raise ValueError("RoomLink candidates must target one installation")
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if reprobe_interval_seconds <= 0:
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raise ValueError("reprobe_interval_seconds must be positive")
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self.candidates = tuple(candidates)
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self._active = 0
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self.reprobe_interval_seconds = float(reprobe_interval_seconds)
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self.clock = clock
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self._last_primary_probe = 0.0
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@property
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def active_link(self) -> RoomLinkCandidate:
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return self.candidates[self._active]
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def _call(self, method: str, **kwargs):
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now = self.clock()
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probe_primary = (
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self._active != 0
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and now - self._last_primary_probe >= self.reprobe_interval_seconds
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)
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if probe_primary:
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self._last_primary_probe = now
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order = [0, self._active]
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else:
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order = [self._active]
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order.extend(
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index for index in range(len(self.candidates)) if index not in order
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)
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last_error = None
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for index in order:
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candidate = self.candidates[index]
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try:
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result = getattr(candidate.client, method)(**kwargs)
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except Exception as exc:
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if bool(getattr(exc, "ambiguous", False)):
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raise
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if not bool(getattr(exc, "retryable", False)):
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raise
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last_error = exc
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continue
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self._active = index
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return result
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if last_error is not None:
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raise last_error
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raise RuntimeError("no RoomLink candidate was attempted")
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def prepare(self, **kwargs):
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return self._call("prepare", **kwargs)
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def dispatch(self, **kwargs):
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return self._call("dispatch", **kwargs)
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def history(self, **kwargs):
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return self._call("history", **kwargs)
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def status(self, **kwargs):
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return self._call("status", **kwargs)
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def stop(self, **kwargs):
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return self._call("stop", **kwargs)
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def bind_room_scope(self, **kwargs):
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for candidate in self.candidates:
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bind = getattr(candidate.client, "bind_room_scope", None)
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if callable(bind):
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bind(**kwargs)
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@dataclass(frozen=True)
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class PeerMemberRoute:
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"""Secret-free target coordinates plus a separately stored room grant."""
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home_install_id: str
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member_id: str
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target_install_id: str
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target_profile: str
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capability_digest: str
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cancellation_scope_id: str
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trace_id: str
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grant: str
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execution_policy_digest: str = ""
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class PeerHostedRoomTransport(InternalSessionRPC):
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"""Translate runtime session operations into recipient-validated peer RPC."""
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def __init__(
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self,
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*,
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binding: HostedRoomBinding,
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route: PeerMemberRoute,
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client: HostedRoomPeerClient,
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source_event_seq: int = 1,
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task_id: str | None = None,
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execution_generation: int | None = None,
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) -> None:
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self.binding = binding
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self.route = route
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self.client = client
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if isinstance(source_event_seq, bool) or source_event_seq < 1:
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raise ValueError("peer room source_event_seq must be positive")
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self.source_event_seq = int(source_event_seq)
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self.task_id = task_id
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self.execution_generation = execution_generation
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self._session_id: str | None = None
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self._dispatch: HostedMemberDispatch | None = None
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bind_scope = getattr(self.client, "bind_room_scope", None)
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if callable(bind_scope):
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bind_scope(
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room_id=self.binding.room_id,
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home_install_id=self.route.home_install_id,
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authority_gateway_id=self.binding.gateway_id,
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authority_epoch=self.binding.authority_epoch,
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member_id=self.route.member_id,
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target_install_id=self.route.target_install_id,
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target_profile=self.route.target_profile,
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)
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def _validate_coordinates(self, *, profile: str, source: str) -> None:
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if source != ROOM_SESSION_SOURCE:
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raise ValueError("peer room transport requires source=bot_room")
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if profile != self.route.target_profile:
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raise ValueError("peer room transport profile does not match its grant")
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def resolve_exact(
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self, *, profile: str, title: str, source: str
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) -> Mapping[str, Any] | None:
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self._validate_coordinates(profile=profile, source=source)
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if title != room_session_title(self.binding.room_id):
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raise ValueError("peer room transport title does not match room identity")
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return self.client.prepare(
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room_id=self.binding.room_id,
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profile=profile,
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source=source,
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grant=self.route.grant,
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create=False,
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)
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def create(self, *, profile: str, title: str, source: str) -> Mapping[str, Any]:
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self._validate_coordinates(profile=profile, source=source)
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if title != room_session_title(self.binding.room_id):
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raise ValueError("peer room transport title does not match room identity")
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session = self.client.prepare(
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room_id=self.binding.room_id,
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profile=profile,
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source=source,
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grant=self.route.grant,
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create=True,
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)
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if session is None:
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raise RuntimeError("peer did not create the room session")
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self._session_id = str(session.get("session_id") or session.get("id") or "")
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return session
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def resume(
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self, *, profile: str, session_id: str, source: str
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) -> Mapping[str, Any]:
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self._validate_coordinates(profile=profile, source=source)
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session = self.client.prepare(
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room_id=self.binding.room_id,
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profile=profile,
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source=source,
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grant=self.route.grant,
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create=False,
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expected_session_id=session_id,
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)
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if session is None:
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raise RuntimeError("peer room session is unavailable")
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self._session_id = session_id
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return session
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def submit(
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self,
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*,
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profile: str,
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session_id: str,
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prompt: str,
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source: str,
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task: TaskIdentity,
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execution_generation: int,
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on_terminal: Callable[[Mapping[str, Any]], None],
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) -> Mapping[str, Any]:
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self._validate_coordinates(profile=profile, source=source)
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if self._session_id not in {None, session_id}:
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raise ValueError("peer room session changed during admission")
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dispatch = HostedMemberDispatch.from_mapping({
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"protocol_version": PROTOCOL_VERSION,
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"room_id": task.room_id,
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"home_install_id": self.route.home_install_id,
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"authority_gateway_id": self.binding.gateway_id,
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"authority_epoch": self.binding.authority_epoch,
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"member_id": self.route.member_id,
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"target_install_id": self.route.target_install_id,
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"target_profile": profile,
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"task_id": task.task_id,
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"execution_generation": execution_generation,
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"source_event_seq": self.source_event_seq,
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"cancellation_scope_id": self.route.cancellation_scope_id,
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"prompt": prompt,
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"prompt_digest": hashlib.sha256(prompt.encode("utf-8")).hexdigest(),
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"capability_digest": self.route.capability_digest,
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"execution_policy_digest": self.route.execution_policy_digest,
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"trace_id": self.route.trace_id or f"trace-{uuid.uuid4().hex}",
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})
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self._dispatch = dispatch
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self._session_id = session_id
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result = self.client.dispatch(
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dispatch=dispatch.as_mapping(),
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grant=self.route.grant,
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)
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if result.get("status") in {"settled", "failed", "cancelled"}:
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on_terminal(result)
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return result
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def history(
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self, *, profile: str, session_id: str, source: str
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) -> Sequence[Mapping[str, Any]]:
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self._validate_coordinates(profile=profile, source=source)
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return self.client.history(
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room_id=self.binding.room_id,
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profile=profile,
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session_id=session_id,
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grant=self.route.grant,
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)
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def info(self, *, profile: str, session_id: str, source: str) -> Mapping[str, Any]:
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self._validate_coordinates(profile=profile, source=source)
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return self.client.status(
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room_id=self.binding.room_id,
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profile=profile,
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session_id=session_id,
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grant=self.route.grant,
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)
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def interrupt(
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self,
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*,
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profile: str,
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session_id: str,
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source: str,
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expected_task_id: str,
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) -> Mapping[str, Any] | None:
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self._validate_coordinates(profile=profile, source=source)
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dispatch = self._dispatch
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if dispatch is None:
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if (
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self.task_id != expected_task_id
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or not self.execution_generation
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or not hasattr(self.client, "stop_receipt")
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):
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return None
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return self.client.stop_receipt(
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task_id=expected_task_id,
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execution_generation=self.execution_generation,
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grant=self.route.grant,
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)
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if dispatch.task_id != expected_task_id:
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return None
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return self.client.stop(
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dispatch=dispatch.as_mapping(),
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grant=self.route.grant,
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)
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