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965b972 42651db 965b972 42651db 965b972 | 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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 | """
Cache Management System
Provides file-based caching with TTL for API responses and track metadata.
Optimized for BeatDebate's specific caching needs.
"""
import json
import hashlib
import time
import os
from pathlib import Path
from typing import Any, Dict, Optional, List
from dataclasses import asdict, is_dataclass
import structlog
from diskcache import Cache
logger = structlog.get_logger(__name__)
class CacheManager:
"""
File-based cache manager with TTL support.
Handles caching for:
- Last.fm API responses
- Spotify API responses
- Track metadata
- Agent strategies
- User preferences
"""
def __init__(self, cache_dir: str = "data/cache"):
"""
Initialize cache manager.
Args:
cache_dir: Directory for cache storage
"""
self.cache_dir = Path(cache_dir)
self.cache_dir.mkdir(parents=True, exist_ok=True)
# Initialize diskcache for different data types
self.caches = {
"lastfm": Cache(str(self.cache_dir / "lastfm")),
"spotify": Cache(str(self.cache_dir / "spotify")),
"tracks": Cache(str(self.cache_dir / "tracks")),
"strategies": Cache(str(self.cache_dir / "strategies")),
"preferences": Cache(str(self.cache_dir / "preferences")),
"embeddings": Cache(str(self.cache_dir / "embeddings"))
}
# Default TTL values (in seconds)
self.default_ttl = {
"lastfm": 7 * 24 * 3600, # 1 week
"spotify": 7 * 24 * 3600, # 1 week
"tracks": 3 * 24 * 3600, # 3 days
"strategies": 12 * 3600, # 12 hours
"preferences": 24 * 3600, # 1 day
"embeddings": 30 * 24 * 3600, # 30 days
}
logger.info(
"Cache manager initialized",
cache_dir=str(self.cache_dir),
cache_types=list(self.caches.keys())
)
def _serialize_value(self, value: Any) -> Any:
"""Serialize value for caching."""
if is_dataclass(value):
return asdict(value)
elif isinstance(value, list) and value and is_dataclass(value[0]):
return [asdict(item) for item in value]
return value
def _deserialize_track_metadata(self, data: Dict[str, Any]) -> Any:
"""Deserialize track metadata from cached dictionary."""
try:
# Import here to avoid circular imports
from ..models.metadata_models import UnifiedTrackMetadata, MetadataSource
from datetime import datetime
# Handle datetime field
if 'last_updated' in data and isinstance(data['last_updated'], str):
data['last_updated'] = datetime.fromisoformat(data['last_updated'])
# Handle MetadataSource enum
if 'source' in data and isinstance(data['source'], str):
data['source'] = MetadataSource(data['source'])
# Create UnifiedTrackMetadata object
return UnifiedTrackMetadata(**data)
except Exception as e:
logger.warning(f"Failed to deserialize track metadata: {e}")
return data # Return as dict if deserialization fails
def _generate_key(self, *args, **kwargs) -> str:
"""Generate cache key from arguments."""
key_data = {
"args": args,
"kwargs": sorted(kwargs.items())
}
key_str = json.dumps(key_data, sort_keys=True, default=str)
return hashlib.md5(key_str.encode()).hexdigest()
def get(
self,
cache_type: str,
key: str,
default: Any = None
) -> Any:
"""
Get value from cache.
Args:
cache_type: Type of cache (lastfm, spotify, etc.)
key: Cache key
default: Default value if not found
Returns:
Cached value or default
"""
if cache_type not in self.caches:
logger.warning("Invalid cache type", cache_type=cache_type)
return default
try:
cache = self.caches[cache_type]
value = cache.get(key, default)
if value is not default:
logger.debug(
"Cache hit",
cache_type=cache_type,
key=key[:16] + "..."
)
else:
logger.debug(
"Cache miss",
cache_type=cache_type,
key=key[:16] + "..."
)
return value
except Exception as e:
logger.error(
"Cache get failed",
cache_type=cache_type,
key=key[:16] + "...",
error=str(e)
)
return default
def set(
self,
cache_type: str,
key: str,
value: Any,
ttl: Optional[int] = None
) -> bool:
"""
Set value in cache.
Args:
cache_type: Type of cache
key: Cache key
value: Value to cache
ttl: Time to live in seconds (uses default if None)
Returns:
True if successful
"""
if cache_type not in self.caches:
logger.warning("Invalid cache type", cache_type=cache_type)
return False
try:
cache = self.caches[cache_type]
if ttl is None:
ttl = self.default_ttl.get(cache_type, 3600)
# Serialize dataclasses
serialized_value = self._serialize_value(value)
cache.set(key, serialized_value, expire=ttl)
logger.debug(
"Cache set",
cache_type=cache_type,
key=key[:16] + "...",
ttl=ttl
)
return True
except Exception as e:
logger.error(
"Cache set failed",
cache_type=cache_type,
key=key[:16] + "...",
error=str(e)
)
return False
def delete(self, cache_type: str, key: str) -> bool:
"""
Delete value from cache.
Args:
cache_type: Type of cache
key: Cache key
Returns:
True if successful
"""
if cache_type not in self.caches:
return False
try:
cache = self.caches[cache_type]
return cache.delete(key)
except Exception as e:
logger.error(
"Cache delete failed",
cache_type=cache_type,
key=key[:16] + "...",
error=str(e)
)
return False
def clear(self, cache_type: Optional[str] = None) -> bool:
"""
Clear cache(s).
Args:
cache_type: Specific cache to clear (all if None)
Returns:
True if successful
"""
try:
if cache_type:
if cache_type in self.caches:
self.caches[cache_type].clear()
logger.info("Cache cleared", cache_type=cache_type)
return True
else:
logger.warning("Invalid cache type", cache_type=cache_type)
return False
else:
for cache_name, cache in self.caches.items():
cache.clear()
logger.info("All caches cleared")
return True
except Exception as e:
logger.error("Cache clear failed", error=str(e))
return False
def get_stats(self) -> Dict[str, Dict[str, Any]]:
"""
Get cache statistics.
Returns:
Dictionary with cache stats
"""
stats = {}
for cache_name, cache in self.caches.items():
try:
# Get basic stats
cache_stats = {
"size": len(cache),
"volume": cache.volume(),
"directory": str(cache.directory)
}
stats[cache_name] = cache_stats
except Exception as e:
logger.error(
"Failed to get cache stats",
cache_name=cache_name,
error=str(e)
)
stats[cache_name] = {"error": str(e)}
return stats
def warm_cache(self, cache_type: str, warm_data: Dict[str, Any]) -> int:
"""
Warm cache with pre-computed data.
Args:
cache_type: Type of cache to warm
warm_data: Dictionary of key-value pairs
Returns:
Number of items cached
"""
if cache_type not in self.caches:
logger.warning("Invalid cache type", cache_type=cache_type)
return 0
cached_count = 0
for key, value in warm_data.items():
if self.set(cache_type, key, value):
cached_count += 1
logger.info(
"Cache warmed",
cache_type=cache_type,
items_cached=cached_count,
total_items=len(warm_data)
)
return cached_count
# Convenience methods for specific cache types
def cache_lastfm_response(
self,
method: str,
params: Dict[str, Any],
response: Any
) -> str:
"""Cache Last.fm API response."""
key = self._generate_key("lastfm", method, **params)
self.set("lastfm", key, response)
return key
def get_lastfm_response(
self,
method: str,
params: Dict[str, Any]
) -> Any:
"""Get cached Last.fm API response."""
key = self._generate_key("lastfm", method, **params)
return self.get("lastfm", key)
def cache_spotify_response(
self,
endpoint: str,
params: Dict[str, Any],
response: Any
) -> str:
"""Cache Spotify API response."""
key = self._generate_key("spotify", endpoint, **params)
self.set("spotify", key, response)
return key
def get_spotify_response(
self,
endpoint: str,
params: Dict[str, Any]
) -> Any:
"""Get cached Spotify API response."""
key = self._generate_key("spotify", endpoint, **params)
return self.get("spotify", key)
def cache_track_metadata(
self,
artist: str,
track: str,
metadata: Any
) -> str:
"""Cache track metadata."""
key = self._generate_key("track", artist.lower(), track.lower())
self.set("tracks", key, metadata)
return key
def get_track_metadata(self, artist: str, track: str) -> Any:
"""Get cached track metadata."""
key = self._generate_key("track", artist.lower(), track.lower())
cached_data = self.get("tracks", key)
# If we got cached data and it's a dictionary, try to deserialize it
if cached_data is not None and isinstance(cached_data, dict):
return self._deserialize_track_metadata(cached_data)
return cached_data
def cache_strategy(
self,
user_query: str,
strategy: Dict[str, Any]
) -> str:
"""Cache planning strategy."""
key = self._generate_key("strategy", user_query)
self.set("strategies", key, strategy, ttl=12 * 3600) # 12 hours
return key
def get_strategy(self, user_query: str) -> Optional[Dict[str, Any]]:
"""Get cached planning strategy."""
key = self._generate_key("strategy", user_query)
return self.get("strategies", key)
def cache_user_preferences(
self,
user_id: str,
preferences: Dict[str, Any]
) -> str:
"""Cache user preferences."""
key = self._generate_key("user_prefs", user_id)
self.set("preferences", key, preferences)
return key
def get_user_preferences(self, user_id: str) -> Optional[Dict[str, Any]]:
"""Get cached user preferences."""
key = self._generate_key("user_prefs", user_id)
return self.get("preferences", key)
def cache_embeddings(
self,
text_hash: str,
embeddings: List[float]
) -> str:
"""Cache text embeddings."""
self.set("embeddings", text_hash, embeddings, ttl=30 * 24 * 3600)
return text_hash
def get_embeddings(self, text_hash: str) -> Optional[List[float]]:
"""Get cached text embeddings."""
return self.get("embeddings", text_hash)
def close(self) -> None:
"""Close all cache connections."""
for cache_name, cache in self.caches.items():
try:
cache.close()
logger.debug("Cache closed", cache_name=cache_name)
except Exception as e:
logger.error(
"Failed to close cache",
cache_name=cache_name,
error=str(e)
)
# Global cache instance
_cache_manager = None
def get_cache_manager() -> CacheManager:
"""Get global cache manager instance."""
global _cache_manager
if _cache_manager is None:
cache_dir = os.getenv("CACHE_DIR", "data/cache")
_cache_manager = CacheManager(cache_dir)
return _cache_manager
def close_cache_manager() -> None:
"""Close global cache manager."""
global _cache_manager
if _cache_manager:
_cache_manager.close()
_cache_manager = None |