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https://github.com/ltcptgeneral/cs239-caching.git
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53 lines
2.0 KiB
Python
53 lines
2.0 KiB
Python
from fastapi import FastAPI, HTTPException
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from database import get_user_ids, get_user_profile, update_user_profile, get_user_friend_ids
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from cache.cache import BaselineCache
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from cache.prefetch_cache import PrefetchCache
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from cache.tiered_cache import TieredCache
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from cache.eviction_seive import SeiveCache
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from config import CACHE_STRATEGY, CACHE_LIMIT, L2_CACHE_LIMIT
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import time
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app = FastAPI()
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# Initialize cache based on strategy from config.yaml or environment variable
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if CACHE_STRATEGY == "Baseline":
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cache = BaselineCache(limit=CACHE_LIMIT)
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elif CACHE_STRATEGY == "Prefetch":
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cache = PrefetchCache(limit=CACHE_LIMIT)
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elif CACHE_STRATEGY == "Tiered":
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cache = TieredCache(limit=CACHE_LIMIT, l2_limit=L2_CACHE_LIMIT)
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elif CACHE_STRATEGY == "Seive":
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cache = SeiveCache(limit=CACHE_LIMIT)
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else:
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raise ValueError(f"Invalid CACHE_STRATEGY: {CACHE_STRATEGY}")
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@app.get("/users")
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def fetch_user_ids():
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return {"ids": get_user_ids()}
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@app.get("/users_and_friends")
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def fetch_user_and_friends():
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return get_user_friend_ids()
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@app.get("/user/{user_id}")
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def fetch_user_profile(user_id: str):
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"""Fetch user profile with caching"""
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start = time.time()
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cached_profile = cache.get(user_id)
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if cached_profile:
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return {"user_id": user_id, "profile": cached_profile, "source": "cache", "time_ms": (time.time() - start) * 1000}
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profile = get_user_profile(user_id)
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if profile is None:
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raise HTTPException(status_code=404, detail="User not found")
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cache.put(user_id, profile) # Store in cache
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return {"user_id": user_id, "profile": profile, "source": "database", "time_ms": (time.time() - start) * 1000}
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@app.post("/update_user/")
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def modify_user_profile(user_id: str, name: str, followers: int, bio: str, posts: str, friends: list[str]):
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"""Update user profile and refresh cache"""
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update_user_profile(user_id, name, followers, bio, posts, friends)
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cache.invalidate(user_id) # Invalidate old cache
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return {"message": "User profile updated successfully"}
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