mirror of
https://gitee.com/wanwujie/deer-flow
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f836d8e17c
* Refactor sandbox state management and improve Docker integration - Removed FileSandboxStateStore and SandboxStateStore classes for a cleaner architecture. - Enhanced LocalContainerBackend to handle port allocation retries and introduced environment variable support for sandbox host configuration. - Updated Paths class to include host_base_dir for Docker volume mounts and ensured proper permissions for sandbox directories. - Modified ExtensionsConfig to improve error handling when loading configuration files and adjusted environment variable resolution. - Updated sandbox configuration to include a replicas option for managing concurrent sandbox containers. - Improved logging and context management in SandboxMiddleware for better sandbox lifecycle handling. - Enhanced network port allocation logic to bind to 0.0.0.0 for compatibility with Docker. - Updated Docker Compose files to ensure proper volume management and environment variable configuration. - Created scripts to ensure necessary configuration files are present before starting services. - Cleaned up unused MCP server configurations in extensions_config.example.json. * Address Copilot review suggestions from PR #1068 (#9) --------- Co-authored-by: Copilot <198982749+Copilot@users.noreply.github.com>
82 lines
3.1 KiB
Python
82 lines
3.1 KiB
Python
import logging
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from typing import NotRequired, override
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from langchain.agents import AgentState
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from langchain.agents.middleware import AgentMiddleware
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from langgraph.runtime import Runtime
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from src.agents.thread_state import SandboxState, ThreadDataState
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from src.sandbox import get_sandbox_provider
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logger = logging.getLogger(__name__)
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class SandboxMiddlewareState(AgentState):
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"""Compatible with the `ThreadState` schema."""
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sandbox: NotRequired[SandboxState | None]
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thread_data: NotRequired[ThreadDataState | None]
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class SandboxMiddleware(AgentMiddleware[SandboxMiddlewareState]):
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"""Create a sandbox environment and assign it to an agent.
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Lifecycle Management:
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- With lazy_init=True (default): Sandbox is acquired on first tool call
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- With lazy_init=False: Sandbox is acquired on first agent invocation (before_agent)
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- Sandbox is reused across multiple turns within the same thread
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- Sandbox is NOT released after each agent call to avoid wasteful recreation
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- Cleanup happens at application shutdown via SandboxProvider.shutdown()
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"""
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state_schema = SandboxMiddlewareState
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def __init__(self, lazy_init: bool = True):
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"""Initialize sandbox middleware.
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Args:
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lazy_init: If True, defer sandbox acquisition until first tool call.
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If False, acquire sandbox eagerly in before_agent().
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Default is True for optimal performance.
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"""
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super().__init__()
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self._lazy_init = lazy_init
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def _acquire_sandbox(self, thread_id: str) -> str:
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provider = get_sandbox_provider()
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sandbox_id = provider.acquire(thread_id)
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logger.info(f"Acquiring sandbox {sandbox_id}")
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return sandbox_id
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@override
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def before_agent(self, state: SandboxMiddlewareState, runtime: Runtime) -> dict | None:
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# Skip acquisition if lazy_init is enabled
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if self._lazy_init:
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return super().before_agent(state, runtime)
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# Eager initialization (original behavior)
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if "sandbox" not in state or state["sandbox"] is None:
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thread_id = runtime.context["thread_id"]
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sandbox_id = self._acquire_sandbox(thread_id)
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logger.info(f"Assigned sandbox {sandbox_id} to thread {thread_id}")
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return {"sandbox": {"sandbox_id": sandbox_id}}
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return super().before_agent(state, runtime)
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@override
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def after_agent(self, state: SandboxMiddlewareState, runtime: Runtime) -> dict | None:
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sandbox = state.get("sandbox")
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if sandbox is not None:
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sandbox_id = sandbox["sandbox_id"]
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logger.info(f"Releasing sandbox {sandbox_id}")
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get_sandbox_provider().release(sandbox_id)
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return None
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if runtime.context.get("sandbox_id") is not None:
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sandbox_id = runtime.context.get("sandbox_id")
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logger.info(f"Releasing sandbox {sandbox_id} from context")
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get_sandbox_provider().release(sandbox_id)
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return None
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# No sandbox to release
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return super().after_agent(state, runtime)
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