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41 lines
1.1 KiB
Python
41 lines
1.1 KiB
Python
"""Redis-backed distributed locks for gateway conversation turns."""
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from __future__ import annotations
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import logging
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import redis
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from app.config import config
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from app.observability.metrics import record_gateway_thread_lock_contention
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logger = logging.getLogger(__name__)
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_redis_client: redis.Redis | None = None
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def _redis() -> redis.Redis:
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global _redis_client
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if _redis_client is None:
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_redis_client = redis.from_url(config.REDIS_APP_URL, decode_responses=True)
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return _redis_client
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def _lock_key(thread_id: int) -> str:
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return f"gateway:thread_lock:{thread_id}"
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def acquire_thread_lock(thread_id: int, ttl: int = 60) -> bool:
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acquired = bool(_redis().set(_lock_key(thread_id), "1", nx=True, ex=ttl))
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if not acquired:
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record_gateway_thread_lock_contention()
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return acquired
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def release_thread_lock(thread_id: int) -> None:
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try:
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_redis().delete(_lock_key(thread_id))
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except redis.RedisError as exc:
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logger.warning(
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"Failed to release gateway thread lock for %s: %s", thread_id, exc
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)
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