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from typing import Optional, Any, Dict, List
import json
import logging
from datetime import datetime
import pickle
from pathlib import Path
from .config import settings
logger = logging.getLogger(__name__)
class RedisCache:
"""Redis cache manager for certificate analysis results."""
def __init__(self, redis_url: Optional[str] = None):
self.redis_url = redis_url or settings.redis_url
self.client: Optional[redis.Redis] = None
self.connected: bool = False
async def connect(self):
"""Connect to Redis."""
if self.connected:
return
try:
self.client = redis.from_url(
self.redis_url,
encoding="utf-8",
decode_responses=False,
)
await self.client.ping()
self.connected = True
logger.info(f"Connected to Redis at {self.redis_url}")
except Exception as e:
self.connected = False
logger.error(f"Failed to connect to Redis: {e}")
async def disconnect(self):
"""Disconnect from Redis."""
if self.client and self.connected:
await self.client.close()
self.connected = False
logger.info("Disconnected from Redis")
async def get(self, key: str) -> Optional[Any]:
"""Get value from cache."""
if not self.connected or not self.client:
return None
try:
data = await self.client.get(key)
if data is None:
return None
# Try JSON first
try:
return json.loads(data.decode("utf-8"))
except Exception:
return pickle.loads(data)
except Exception as e:
logger.error(f"Cache get failed for key {key}: {e}")
return None
async def set(self, key: str, value: Any, ttl: Optional[int] = None) -> bool:
"""Set value in cache, optionally with TTL."""
if not self.connected or not self.client:
return False
try:
# Serialize value
try:
data = json.dumps(value, default=str).encode("utf-8")
except Exception:
data = pickle.dumps(value)
if ttl:
await self.client.setex(key, ttl, data)
else:
await self.client.set(key, data)
return True
except Exception as e:
logger.error(f"Cache set failed for key {key}: {e}")
return False
# Add a proper setex wrapper for legacy code
async def setex(self, key: str, ttl: int, value: Any) -> bool:
"""Set value with TTL (alias for compatibility)."""
return await self.set(key, value, ttl)
async def delete(self, key: str) -> bool:
"""Delete key from cache."""
if not self.connected or not self.client:
return False
try:
result = await self.client.delete(key)
return result > 0
except Exception as e:
logger.error(f"Cache delete failed for key {key}: {e}")
return False
async def exists(self, key: str) -> bool:
"""Check if key exists in cache."""
if not self.connected or not self.client:
return False
try:
return await self.client.exists(key) > 0
except Exception as e:
logger.error(f"Cache exists check failed for key {key}: {e}")
return False
async def keys(self, pattern: str = "*") -> List[str]:
"""Get keys matching pattern."""
if not self.connected or not self.client:
return []
try:
return await self.client.keys(pattern)
except Exception as e:
logger.error(f"Cache keys failed for pattern {pattern}: {e}")
return []
async def clear_pattern(self, pattern: str) -> int:
"""Clear keys matching pattern."""
if not self.connected or not self.client:
return 0
try:
keys = await self.keys(pattern)
if keys:
await self.client.delete(*keys)
logger.info(f"Cleared {len(keys)} keys matching pattern: {pattern}")
return len(keys)
return 0
except Exception as e:
logger.error(f"Cache clear pattern failed for {pattern}: {e}")
return 0
async def get_stats(self) -> Dict[str, Any]:
"""Get cache statistics."""
if not self.connected or not self.client:
return {"status": "disconnected"}
try:
info = await self.client.info()
analysis_keys = await self.keys("analysis:*")
certificate_keys = await self.keys("certificate:*")
return {
"status": "connected",
"redis_version": info.get("redis_version", "unknown"),
"used_memory": info.get("used_memory_human", "unknown"),
"connected_clients": info.get("connected_clients", 0),
"total_analysis_cache": len(analysis_keys),
"total_certificate_cache": len(certificate_keys),
"timestamp": datetime.now().isoformat(),
}
except Exception as e:
logger.error(f"Cache stats failed: {e}")
return {"status": "error", "error": str(e)}
# Global cache instance
redis_client = RedisCache()
async def get_redis_client() -> RedisCache:
"""Return global Redis client instance."""
if not redis_client.connected:
await redis_client.connect()
return redis_client
async def init_cache():
"""Initialize cache connection."""
await redis_client.connect()
async def close_cache():
"""Close cache connection."""
await redis_client.disconnect()
# import redis.asyncio as redis
# from typing import Optional, Any, Dict
# import json
# import logging
# from datetime import datetime
# import pickle
# from .config import settings
# logger = logging.getLogger(__name__)
# class RedisCache:
# """Redis cache manager for certificate analysis results"""
# def __init__(self, redis_url: Optional[str] = None):
# self.redis_url = redis_url or settings.redis_url
# self.client: Optional[redis.Redis] = None
# self.connected = False
# async def connect(self):
# """Connect to Redis"""
# try:
# self.client = redis.from_url(
# self.redis_url,
# encoding="utf-8",
# decode_responses=False
# )
# await self.client.ping()
# self.connected = True
# logger.info(f"Connected to Redis at {self.redis_url}")
# except Exception as e:
# logger.error(f"Failed to connect to Redis: {e}")
# self.connected = False
# async def disconnect(self):
# """Disconnect from Redis"""
# if self.client and self.connected:
# await self.client.close()
# self.connected = False
# logger.info("Disconnected from Redis")
# async def get(self, key: str) -> Optional[Any]:
# """Get value from cache"""
# if not self.connected or not self.client:
# return None
# try:
# data = await self.client.get(key)
# if data:
# try:
# # Try JSON first
# return json.loads(data.decode('utf-8'))
# except:
# # Fallback to pickle
# return pickle.loads(data)
# return None
# except Exception as e:
# logger.error(f"Cache get failed for key {key}: {e}")
# return None
# async def set(self, key: str, value: Any, ttl: Optional[int] = None):
# """Set value in cache"""
# if not self.connected or not self.client:
# return False
# try:
# # Try JSON serialization first
# try:
# data = json.dumps(value, default=str).encode('utf-8')
# except:
# # Fallback to pickle
# data = pickle.dumps(value)
# if ttl:
# await self.client.setex(key, ttl, data)
# else:
# await self.client.set(key, data)
# return True
# except Exception as e:
# logger.error(f"Cache set failed for key {key}: {e}")
# return False
# async def delete(self, key: str) -> bool:
# """Delete key from cache"""
# if not self.connected or not self.client:
# return False
# try:
# result = await self.client.delete(key)
# return result > 0
# except Exception as e:
# logger.error(f"Cache delete failed for key {key}: {e}")
# return False
# async def exists(self, key: str) -> bool:
# """Check if key exists in cache"""
# if not self.connected or not self.client:
# return False
# try:
# return await self.client.exists(key) > 0
# except Exception as e:
# logger.error(f"Cache exists check failed for key {key}: {e}")
# return False
# async def keys(self, pattern: str = "*") -> list:
# """Get keys matching pattern"""
# if not self.connected or not self.client:
# return []
# try:
# return await self.client.keys(pattern)
# except Exception as e:
# logger.error(f"Cache keys failed for pattern {pattern}: {e}")
# return []
# async def clear_pattern(self, pattern: str) -> int:
# """Clear keys matching pattern"""
# if not self.connected or not self.client:
# return 0
# try:
# keys = await self.keys(pattern)
# if keys:
# await self.client.delete(*keys)
# logger.info(f"Cleared {len(keys)} keys matching pattern: {pattern}")
# return len(keys)
# return 0
# except Exception as e:
# logger.error(f"Cache clear pattern failed for {pattern}: {e}")
# return 0
# async def get_stats(self) -> Dict[str, Any]:
# """Get cache statistics"""
# if not self.connected or not self.client:
# return {"status": "disconnected"}
# try:
# info = await self.client.info()
# # Get analysis cache stats
# analysis_keys = await self.keys("analysis:*")
# certificate_keys = await self.keys("certificate:*")
# return {
# "status": "connected",
# "redis_version": info.get("redis_version", "unknown"),
# "used_memory": info.get("used_memory_human", "unknown"),
# "connected_clients": info.get("connected_clients", 0),
# "total_analysis_cache": len(analysis_keys),
# "total_certificate_cache": len(certificate_keys),
# "timestamp": datetime.now().isoformat()
# }
# except Exception as e:
# logger.error(f"Cache stats failed: {e}")
# return {"status": "error", "error": str(e)}
# # Global cache instance
# redis_client = RedisCache()
# async def get_redis_client() -> RedisCache:
# """Get Redis client instance"""
# if not redis_client.connected:
# await redis_client.connect()
# return redis_client
# async def init_cache():
# """Initialize cache connection"""
# await redis_client.connect()
# async def close_cache():
# """Close cache connection"""
# await redis_client.disconnect() |