144 lines
4.2 KiB
Python
144 lines
4.2 KiB
Python
from dataclasses import dataclass
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from datetime import timedelta
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from uuid import UUID, uuid4
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from domain.sandbox import SandboxSession
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from usecase.interface import (
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Clock,
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Logger,
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SandboxLifecycleLocker,
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SandboxRuntime,
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SandboxSessionRepository,
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)
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@dataclass(frozen=True, slots=True)
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class CreateSandboxCommand:
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chat_id: UUID
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class CreateSandbox:
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def __init__(
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self,
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repository: SandboxSessionRepository,
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locker: SandboxLifecycleLocker,
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runtime: SandboxRuntime,
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clock: Clock,
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logger: Logger,
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ttl: timedelta,
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) -> None:
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self._repository = repository
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self._locker = locker
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self._runtime = runtime
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self._clock = clock
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self._logger = logger
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self._ttl = ttl
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def execute(self, command: CreateSandboxCommand) -> SandboxSession:
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chat_id = command.chat_id
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with self._locker.lock(chat_id):
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session = self._repository.get_active_by_chat_id(chat_id)
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now = self._clock.now()
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if session is not None and session.expires_at > now:
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self._logger.info(
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'sandbox_reused',
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attrs=_sandbox_attrs(session),
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)
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return session
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if session is not None:
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self._logger.info(
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'sandbox_replaced',
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attrs=_sandbox_attrs(session),
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)
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self._runtime.stop(session.container_id)
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self._repository.delete(session.session_id)
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created_at = self._clock.now()
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expires_at = created_at + self._ttl
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new_session = self._runtime.create(
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session_id=_new_session_id(),
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chat_id=chat_id,
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created_at=created_at,
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expires_at=expires_at,
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)
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self._repository.save(new_session)
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self._logger.info(
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'sandbox_created',
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attrs=_sandbox_attrs(new_session),
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)
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return new_session
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class CleanupExpiredSandboxes:
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def __init__(
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self,
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repository: SandboxSessionRepository,
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locker: SandboxLifecycleLocker,
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runtime: SandboxRuntime,
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clock: Clock,
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logger: Logger,
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) -> None:
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self._repository = repository
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self._locker = locker
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self._runtime = runtime
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self._clock = clock
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self._logger = logger
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def execute(self) -> list[SandboxSession]:
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expired_sessions = self._repository.list_expired(self._clock.now())
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cleaned_sessions: list[SandboxSession] = []
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for session in expired_sessions:
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try:
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cleaned_session = self._cleanup_session(session)
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except Exception as exc:
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attrs = _sandbox_attrs(session)
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attrs['error'] = type(exc).__name__
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self._logger.error(
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'sandbox_clean_failed',
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attrs=attrs,
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)
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continue
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if cleaned_session is None:
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continue
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cleaned_sessions.append(cleaned_session)
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self._logger.info(
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'sandbox_cleaned',
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attrs=_sandbox_attrs(cleaned_session),
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)
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return cleaned_sessions
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def _cleanup_session(self, session: SandboxSession) -> SandboxSession | None:
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with self._locker.lock(session.chat_id):
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current_session = self._repository.get_active_by_chat_id(session.chat_id)
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now = self._clock.now()
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if current_session is None:
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return None
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if current_session.session_id != session.session_id:
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return None
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if current_session.expires_at > now:
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return None
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self._runtime.stop(current_session.container_id)
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self._repository.delete(current_session.session_id)
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return current_session
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def _new_session_id() -> UUID:
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return uuid4()
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def _sandbox_attrs(session: SandboxSession) -> dict[str, str]:
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return {
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'chat_id': str(session.chat_id),
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'session_id': str(session.session_id),
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'container_id': session.container_id,
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}
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