wehub-resource-sync
116 lines
4.3 KiB
Python
116 lines
4.3 KiB
Python
# Copyright (c) ModelScope Contributors. All rights reserved.
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"""Thin wrapper around OpenEnv's GenericEnvClient with reconnection support.
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This wrapper only manages the WebSocket connection and forwards raw actions
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to the server. Action parsing (LLM text → dict) and observation formatting
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(dict → LLM string) are handled by the :class:`OpenEnvScheduler` subclass,
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not here.
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env_config keys consumed:
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base_url (str): OpenEnv server URL (e.g. 'http://localhost:8000').
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reset_kwargs (dict, optional): Extra kwargs passed to client.reset().
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"""
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import time
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from typing import Any, Dict, Tuple
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from swift.utils import get_logger
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logger = get_logger()
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_MAX_RETRIES = 3
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_RETRY_DELAY = 2.0
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class OpenEnvWrapper:
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"""Thin wrapper around ``GenericEnvClient`` with reconnection support.
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Unlike the previous version, this class does **not** inherit from
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``Env`` and does **not** parse LLM text or format observations.
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All such logic lives in :class:`~swift.rollout.multi_turn.OpenEnvScheduler`
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and its subclasses.
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"""
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def __init__(self, env_config: Dict[str, Any]):
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self.base_url = env_config.get('base_url', 'http://localhost:8000')
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self.reset_kwargs = env_config.get('reset_kwargs', {})
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self._client = None
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# ------------------------------------------------------------------
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# Connection management
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# ------------------------------------------------------------------
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def _ensure_client(self):
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"""Lazily create the OpenEnv client (sync wrapper)."""
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if self._client is None:
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from openenv.core.generic_client import GenericEnvClient
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client = GenericEnvClient(base_url=self.base_url)
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sync_client = client.sync()
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sync_client.__enter__()
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self._client = sync_client
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return self._client
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def _reconnect_client(self):
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"""Close old client (recover from connection loss).
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Only cleans up; the next _ensure_client() call will create a new connection.
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"""
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if self._client is not None:
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try:
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self._client.__exit__(None, None, None)
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except Exception:
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pass
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self._client = None
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def _call_with_retry(self, fn_name: str, *args, **kwargs):
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"""Call a client method with retry on connection failure."""
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last_exc = None
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for attempt in range(_MAX_RETRIES):
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try:
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client = self._ensure_client()
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return getattr(client, fn_name)(*args, **kwargs)
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except Exception as e:
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last_exc = e
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logger.warning(f'OpenEnv {fn_name} failed (attempt {attempt + 1}/{_MAX_RETRIES}): {e}')
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if attempt < _MAX_RETRIES - 1:
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time.sleep(_RETRY_DELAY * (attempt + 1))
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self._reconnect_client()
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raise last_exc
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# ------------------------------------------------------------------
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# Public API (synchronous — called from async scheduler via run_in_executor
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# or directly since GenericEnvClient.sync() is already blocking)
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# ------------------------------------------------------------------
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def reset(self) -> Tuple[Any, Any]:
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"""Reset the OpenEnv environment.
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Returns:
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(raw_observation, metadata) — unformatted, as returned by the server.
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"""
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result = self._call_with_retry('reset', **self.reset_kwargs)
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return result.observation, getattr(result, 'metadata', None)
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def step(self, action_dict: Dict[str, Any]) -> Tuple[Any, float, bool, Any]:
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"""Execute one step in the OpenEnv environment.
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Args:
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action_dict: Pre-parsed action dict (e.g. ``{'answer': '7'}``).
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Returns:
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(raw_observation, reward, done, metadata) — unformatted.
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"""
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result = self._call_with_retry('step', action_dict)
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reward = float(result.reward or 0.0)
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done = bool(result.done)
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return result.observation, reward, done, getattr(result, 'metadata', None)
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def close(self):
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"""Close the OpenEnv client connection."""
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if self._client is not None:
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try:
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self._client.__exit__(None, None, None)
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except Exception:
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logger.debug('OpenEnv client close failed', exc_info=True)
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self._client = None
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