Spaces:
Sleeping
Sleeping
File size: 13,538 Bytes
c71bf62 b8c8241 c71bf62 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 | """FastAPI assembly for Dispatch Arena."""
from __future__ import annotations
import os
import socket
import threading
import time
import uuid
from dataclasses import dataclass, field
from pathlib import Path
from typing import Dict, Optional, Tuple
import uvicorn
from fastapi import FastAPI, HTTPException, WebSocket, WebSocketDisconnect
from fastapi.responses import FileResponse
from fastapi.staticfiles import StaticFiles
from dispatch_arena.models import Action, Config, Observation, State
from dispatch_arena.server.api import CreateSessionRequest, ResetRequest, StepRequest
from dispatch_arena.server.env import DEFAULT_MAX_TICKS, DispatchArenaEnvironment
from dispatch_arena.server.metrics import episode_metrics
from dispatch_arena.server.replay_store import ReplayStore
from dispatch_arena.server.scenarios import scenario_catalog
SUPPORTS_CONCURRENT_SESSIONS = True
DEFAULT_MAX_CONCURRENT_ENVS = 16
MAX_CONCURRENT_ENVS_ENV = "DISPATCH_ARENA_MAX_CONCURRENT_ENVS"
@dataclass
class _Session:
env: DispatchArenaEnvironment
lock: threading.Lock = field(default_factory=threading.Lock)
@dataclass
class DispatchArenaServerApp:
"""Session manager used by REST, WebSocket, and OpenEnv endpoints."""
max_concurrent_envs: int = DEFAULT_MAX_CONCURRENT_ENVS
max_ticks: int = DEFAULT_MAX_TICKS
replay_store: ReplayStore = field(default_factory=ReplayStore)
_sessions: Dict[str, _Session] = field(default_factory=dict)
_lock: threading.Lock = field(default_factory=threading.Lock)
def create_session(self, config: Config, seed: Optional[int] = None) -> tuple[str, Observation]:
session_id = str(uuid.uuid4())
with self._lock:
if len(self._sessions) >= self.max_concurrent_envs:
raise RuntimeError(f"Max concurrent envs reached ({self.max_concurrent_envs}).")
env = DispatchArenaEnvironment(config=config)
self._sessions[session_id] = _Session(env=env)
self.replay_store.start_session(session_id)
obs = self.reset(session_id=session_id, seed=seed, config=config, episode_id=session_id)
return session_id, obs
def reset(
self,
seed: Optional[int] = None,
episode_id: Optional[str] = None,
session_id: Optional[str] = None,
config: Optional[Config] = None,
) -> Observation:
session = self._get_or_create_session(session_id=session_id, config=config)
resolved_session_id = self._session_id_for(session)
with session.lock:
obs = session.env.reset(seed=seed, episode_id=episode_id or resolved_session_id, config=config)
self.replay_store.start_session(resolved_session_id)
self.replay_store.append_reset(resolved_session_id, obs)
return obs
def step(self, session_id: str, action: Action | str | dict) -> Observation:
session = self._require_session(session_id)
with session.lock:
parsed = action if isinstance(action, Action) else Action.from_dict(action) if isinstance(action, dict) else Action(action_type=action)
obs = session.env.step(parsed)
self.replay_store.append_step(session_id, parsed, obs)
if obs.done:
self.replay_store.append_summary(session_id, session.env.get_episode_summary())
return obs
def state(self, session_id: str) -> State:
session = self._require_session(session_id)
with session.lock:
return session.env.state
def summary(self, session_id: str) -> dict:
session = self._require_session(session_id)
with session.lock:
summary = session.env.get_episode_summary()
summary["metrics"] = episode_metrics(session.env.state)
return summary
def replay(self, session_id: str) -> list[dict]:
self._require_session(session_id)
return self.replay_store.load(session_id)
def health(self) -> dict:
return {
"status": "ok",
"service": "dispatch_arena",
"supports_concurrent_sessions": SUPPORTS_CONCURRENT_SESSIONS,
}
def ready(self) -> dict:
with self._lock:
return {
"ready": True,
"active_sessions": len(self._sessions),
"max_concurrent_envs": self.max_concurrent_envs,
}
def _get_or_create_session(self, session_id: Optional[str], config: Optional[Config]) -> _Session:
with self._lock:
if session_id and session_id in self._sessions:
return self._sessions[session_id]
if len(self._sessions) >= self.max_concurrent_envs:
raise RuntimeError(f"Max concurrent envs reached ({self.max_concurrent_envs}).")
resolved_session_id = session_id or str(uuid.uuid4())
env = DispatchArenaEnvironment(config=config or Config(max_ticks=self.max_ticks))
session = _Session(env=env)
self._sessions[resolved_session_id] = session
self.replay_store.start_session(resolved_session_id)
return session
def _session_id_for(self, session: _Session) -> str:
with self._lock:
for session_id, candidate in self._sessions.items():
if candidate is session:
return session_id
raise KeyError("Unknown session")
def _require_session(self, session_id: str) -> _Session:
with self._lock:
if session_id not in self._sessions:
raise KeyError(f"Unknown session_id: {session_id}")
return self._sessions[session_id]
def create_app(
max_concurrent_envs: Optional[int] = None,
max_ticks: int = DEFAULT_MAX_TICKS,
) -> FastAPI:
if max_concurrent_envs is None:
max_concurrent_envs = int(os.getenv(MAX_CONCURRENT_ENVS_ENV, str(DEFAULT_MAX_CONCURRENT_ENVS)))
manager = DispatchArenaServerApp(max_concurrent_envs=max_concurrent_envs, max_ticks=max_ticks)
app = FastAPI(title="Dispatch Arena", version="0.1.0")
app.state.dispatch_arena = manager
@app.get("/healthz")
def healthz() -> dict:
return manager.health()
@app.get("/health")
def health() -> dict:
return manager.health()
@app.get("/ready")
def ready() -> dict:
return manager.ready()
@app.post("/api/sessions")
def api_create_session(payload: CreateSessionRequest) -> dict:
try:
session_id, obs = manager.create_session(payload.resolved_config(max_ticks), seed=payload.seed)
return {"session_id": session_id, "observation": obs.to_dict()}
except RuntimeError as exc:
raise HTTPException(status_code=409, detail=str(exc)) from exc
@app.post("/api/sessions/{session_id}/reset")
def api_reset(session_id: str, payload: ResetRequest | None = None) -> dict:
payload = payload or ResetRequest()
try:
fallback = manager._require_session(session_id).env.config if session_id in manager._sessions else Config(max_ticks=max_ticks)
obs = manager.reset(
session_id=session_id,
seed=payload.seed,
episode_id=payload.episode_id or session_id,
config=payload.resolved_config(fallback),
)
return {"session_id": session_id, "observation": obs.to_dict()}
except KeyError as exc:
raise HTTPException(status_code=404, detail=str(exc)) from exc
except RuntimeError as exc:
raise HTTPException(status_code=409, detail=str(exc)) from exc
@app.post("/api/sessions/{session_id}/step")
def api_step(session_id: str, payload: StepRequest) -> dict:
try:
obs = manager.step(session_id=session_id, action=payload.action)
return {"session_id": session_id, "observation": obs.to_dict()}
except KeyError as exc:
raise HTTPException(status_code=404, detail=str(exc)) from exc
except (RuntimeError, ValueError, TypeError) as exc:
raise HTTPException(status_code=400, detail=str(exc)) from exc
@app.get("/api/sessions/{session_id}/state")
def api_state(session_id: str) -> dict:
try:
return {"session_id": session_id, "state": manager.state(session_id).to_dict()}
except KeyError as exc:
raise HTTPException(status_code=404, detail=str(exc)) from exc
@app.get("/api/sessions/{session_id}/replay")
def api_replay(session_id: str) -> dict:
try:
return {"session_id": session_id, "records": manager.replay(session_id)}
except KeyError as exc:
raise HTTPException(status_code=404, detail=str(exc)) from exc
@app.get("/api/scenarios")
def api_scenarios() -> dict:
return {"scenarios": scenario_catalog()}
@app.websocket("/api/sessions/{session_id}/stream")
async def api_stream(websocket: WebSocket, session_id: str) -> None:
await websocket.accept()
try:
while True:
await websocket.send_json(
{
"session_id": session_id,
"state": manager.state(session_id).to_dict(),
"replay": manager.replay(session_id),
}
)
await websocket.receive_text()
except (WebSocketDisconnect, KeyError):
return
@app.post("/reset")
def openenv_reset(payload: ResetRequest) -> dict:
config = Config(max_ticks=max_ticks)
if payload.config or payload.mode is not None:
config = payload.resolved_config(config)
try:
session_id = payload.session_id or str(uuid.uuid4())
obs = manager.reset(
session_id=session_id,
seed=payload.seed,
episode_id=payload.episode_id or session_id,
config=config,
)
return {"session_id": session_id, "observation": obs.to_dict()}
except RuntimeError as exc:
raise HTTPException(status_code=409, detail=str(exc)) from exc
@app.post("/step")
def openenv_step(payload: StepRequest) -> dict:
if not payload.session_id:
raise HTTPException(status_code=400, detail="Missing required field: session_id")
try:
obs = manager.step(session_id=payload.session_id, action=payload.action)
return {"session_id": payload.session_id, "observation": obs.to_dict()}
except KeyError as exc:
raise HTTPException(status_code=404, detail=str(exc)) from exc
except (RuntimeError, ValueError, TypeError) as exc:
raise HTTPException(status_code=400, detail=str(exc)) from exc
@app.get("/state")
def openenv_state(session_id: str) -> dict:
try:
return {"session_id": session_id, "state": manager.state(session_id).to_dict()}
except KeyError as exc:
raise HTTPException(status_code=404, detail=str(exc)) from exc
@app.get("/summary")
def openenv_summary(session_id: str) -> dict:
try:
return {"session_id": session_id, "episode_summary": manager.summary(session_id)}
except KeyError as exc:
raise HTTPException(status_code=404, detail=str(exc)) from exc
static_dir = Path(__file__).parent / "static"
assets_dir = static_dir / "assets"
if static_dir.exists():
if assets_dir.exists():
app.mount("/assets", StaticFiles(directory=assets_dir), name="assets")
@app.get("/")
def index() -> FileResponse:
return FileResponse(static_dir / "index.html")
@app.get("/web")
def web_index() -> FileResponse:
return FileResponse(static_dir / "index.html")
@app.get("/web/{path:path}")
def web_index_catchall(path: str) -> FileResponse:
return FileResponse(static_dir / "index.html")
return app
class _UvicornThreadHandle:
def __init__(self, server: uvicorn.Server, thread: threading.Thread, address: tuple[str, int]) -> None:
self._server = server
self._thread = thread
self.server_address = address
def shutdown(self) -> None:
self._server.should_exit = True
def server_close(self) -> None:
return None
def run_local_server(host: str = "127.0.0.1", port: int = 8080, max_concurrent_envs: Optional[int] = None) -> Tuple[str, int]:
app = create_app(max_concurrent_envs=max_concurrent_envs)
uvicorn.run(app, host=host, port=port)
return host, port
def run_local_server_in_thread(host: str = "127.0.0.1", port: int = 0, max_concurrent_envs: Optional[int] = None):
if port == 0:
with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as sock:
sock.bind((host, 0))
port = sock.getsockname()[1]
app = create_app(max_concurrent_envs=max_concurrent_envs)
config = uvicorn.Config(app, host=host, port=port, log_level="warning")
server = uvicorn.Server(config)
thread = threading.Thread(target=server.run, daemon=True)
thread.start()
deadline = time.time() + 5
while not server.started and time.time() < deadline:
time.sleep(0.05)
return _UvicornThreadHandle(server, thread, (host, port)), thread
def main() -> None:
port = int(os.getenv("PORT", "8080"))
run_local_server(host="0.0.0.0", port=port)
if __name__ == "__main__":
main()
|