Spaces:
Sleeping
Sleeping
File size: 3,930 Bytes
41564f9 | 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 | #!/usr/bin/env python3
"""
Shared in-memory state for Cain worker process.
This module provides a thread-safe in-memory cache for worker state
that replaces file-based heartbeat writes. The worker process (brain_minimal.py)
updates this state via HTTP POST to app.py's internal endpoint.
Key design:
- No file I/O for heartbeat (eliminates race conditions)
- In-memory state cache in app.py
- Worker state reflects activity level, not just PID existence
"""
import threading
import time
from datetime import datetime
from typing import Any, Optional
class WorkerState:
"""
Thread-safe in-memory cache for worker state.
This is the source of truth for worker activity status.
Updated by brain_minimal.py via HTTP POST to /internal/heartbeat.
"""
def __init__(self):
self._lock = threading.Lock()
self._state = {
# Worker activity state (decoupled from PID)
"worker_state": "idle", # idle, active, processing
"worker_active": False,
"current_state": "idle", # backward compatibility
# Process info (for logging/debugging)
"worker_pid": None,
"worker_mode": None,
# Heartbeat timestamps
"last_heartbeat": None,
"heartbeat_age_seconds": 0,
# Stage info
"stage": "RUNNING_A2A_READY",
# Health status
"health": "HEALTHY",
"error": None,
}
def update(self, **kwargs):
"""Update worker state with new values (thread-safe)."""
with self._lock:
# Update heartbeat timestamp
self._state["last_heartbeat"] = datetime.utcnow().isoformat() + "+00:00"
self._state["heartbeat_age_seconds"] = 0
# Update provided fields
for key, value in kwargs.items():
if value is not None:
self._state[key] = value
def get(self) -> dict[str, Any]:
"""Get current state snapshot (thread-safe)."""
with self._lock:
# Calculate heartbeat age
if self._state["last_heartbeat"]:
try:
heartbeat_time = datetime.fromisoformat(
self._state["last_heartbeat"].replace("+00:00", "").replace("Z", "")
)
if heartbeat_time.tzinfo is not None:
heartbeat_time = heartbeat_time.replace(tzinfo=None)
age = (datetime.utcnow() - heartbeat_time).total_seconds()
self._state["heartbeat_age_seconds"] = age
except Exception:
self._state["heartbeat_age_seconds"] = 999
return self._state.copy()
def is_healthy(self, max_age_seconds: int = 15) -> bool:
"""
Check if worker is healthy based on heartbeat age.
Args:
max_age_seconds: Maximum acceptable heartbeat age (default 15s)
Returns:
True if heartbeat is fresh, False otherwise
"""
with self._lock:
return self._state["heartbeat_age_seconds"] < max_age_seconds
def get_worker_state(self) -> str:
"""
Get worker activity state (decoupled from PID).
Returns:
"idle", "active", or "processing" based on actual activity
"""
with self._lock:
# If heartbeat is stale, worker is not active
if not self.is_healthy():
return "idle"
# Return the worker activity state (not PID-based)
return self._state.get("worker_state", "idle")
# Global singleton
_worker_state: Optional[WorkerState] = None
def get_worker_state() -> WorkerState:
"""Get or create the global worker state singleton."""
global _worker_state
if _worker_state is None:
_worker_state = WorkerState()
return _worker_state
|