deer-flow/backend/src/sandbox/local/local_sandbox_provider.py

from src.sandbox.local.local_sandbox import LocalSandbox
from src.sandbox.sandbox_provider import SandboxProvider

_singleton: LocalSandbox | None = None


class LocalSandboxProvider(SandboxProvider):
    def acquire(self, thread_id: str | None = None) -> str:
        global _singleton
        if _singleton is None:
            _singleton = LocalSandbox("local")
        return _singleton.id

    def get(self, sandbox_id: str) -> None:
        if sandbox_id == "local":
            if _singleton is None:
                self.acquire()
            return _singleton
        return None

    def release(self, sandbox_id: str) -> None:
        pass