from typing import Any, Optional
import json
import logging

class CacheService:
    def __init__(self):
        # Placeholder for Redis client
        self._redis = None
        self._is_enabled = False

    async def get(self, key: str) -> Optional[Any]:
        if not self._is_enabled:
            return None
        # Logic to get from Redis
        return None

    async def set(self, key: str, value: Any, expire: int = 300):
        if not self._is_enabled:
            return
        # Logic to set in Redis
        pass

cache_service = CacheService()