wehub-resource-sync
e4dcfc49aa
Tests / Import Check (Python 3.13) (push) Has been cancelled
Tests / Import Check (Python 3.14) (push) Has been cancelled
Tests / Python Tests (Python 3.11) (push) Has been cancelled
Tests / Python Tests (Python 3.12) (push) Has been cancelled
Tests / Python Tests (Python 3.14) (push) Has been cancelled
Tests / Test Summary (push) Has been cancelled
Tests / Lint and Format (push) Has been cancelled
Tests / Web Node Tests (push) Has been cancelled
Tests / Import Check (Python 3.11) (push) Has been cancelled
Tests / Import Check (Python 3.12) (push) Has been cancelled
Tests / Python Tests (Python 3.13) (push) Has been cancelled
89 lines
3.0 KiB
Python
89 lines
3.0 KiB
Python
"""
|
|
Circuit Breaker - Simple circuit breaker for providers.
|
|
"""
|
|
|
|
import logging
|
|
import threading
|
|
import time
|
|
from typing import Dict
|
|
|
|
logger = logging.getLogger(__name__)
|
|
|
|
|
|
class CircuitBreaker:
|
|
"""
|
|
Simple circuit breaker that opens when error rate is high.
|
|
"""
|
|
|
|
def __init__(self, failure_threshold: int = 5, recovery_timeout: int = 60):
|
|
"""Initialize circuit breaker state for providers."""
|
|
self.failure_threshold = failure_threshold
|
|
self.recovery_timeout = recovery_timeout
|
|
self.failure_count: Dict[str, int] = {}
|
|
self.last_failure_time: Dict[str, float] = {}
|
|
self.state: Dict[str, str] = {} # 'closed', 'open', 'half-open'
|
|
self.lock = threading.Lock()
|
|
|
|
def call(self, provider: str) -> bool:
|
|
"""Check if call is allowed."""
|
|
with self.lock:
|
|
state = self.state.get(provider, "closed")
|
|
if state == "closed":
|
|
return True
|
|
elif state == "open":
|
|
if time.time() - self.last_failure_time.get(provider, 0) > self.recovery_timeout:
|
|
self.state[provider] = "half-open"
|
|
logger.info("Circuit breaker for %s entering half-open state" % provider)
|
|
return True
|
|
return False
|
|
elif state == "half-open":
|
|
return True
|
|
logger.error("Circuit breaker for %s has unexpected state: %s" % (provider, state))
|
|
return False
|
|
|
|
def record_success(self, provider: str) -> None:
|
|
"""Record successful call."""
|
|
with self.lock:
|
|
if self.state.get(provider) == "half-open":
|
|
self.state[provider] = "closed"
|
|
self.failure_count[provider] = 0
|
|
logger.info("Circuit breaker for %s closed" % provider)
|
|
elif self.state.get(provider) == "closed":
|
|
self.failure_count[provider] = 0
|
|
|
|
def record_failure(self, provider: str) -> None:
|
|
"""Record failed call."""
|
|
with self.lock:
|
|
self.failure_count[provider] = self.failure_count.get(provider, 0) + 1
|
|
self.last_failure_time[provider] = time.time()
|
|
if self.failure_count[provider] >= self.failure_threshold:
|
|
self.state[provider] = "open"
|
|
logger.warning(
|
|
"Circuit breaker for %s opened due to %s failures"
|
|
% (provider, self.failure_count[provider])
|
|
)
|
|
|
|
|
|
# Global instance
|
|
circuit_breaker = CircuitBreaker()
|
|
|
|
|
|
def alert_callback(provider: str, _rate: float) -> None:
|
|
"""Alert callback to trigger circuit breaker."""
|
|
circuit_breaker.record_failure(provider)
|
|
|
|
|
|
def is_call_allowed(provider: str) -> bool:
|
|
"""Check if call is allowed by circuit breaker."""
|
|
return circuit_breaker.call(provider)
|
|
|
|
|
|
def record_call_success(provider: str) -> None:
|
|
"""Record successful call."""
|
|
circuit_breaker.record_success(provider)
|
|
|
|
|
|
def record_call_failure(provider: str) -> None:
|
|
"""Record failed call."""
|
|
circuit_breaker.record_failure(provider)
|