view asyncio_threads/bucket_questions/single_thread_async.py @ 71:75de5903355c

Giagantic changes that update Dowa library to be more align with stb style array and hashmap. Updated Seobeo to be caching on server side instead of file level caching. Deleted bunch of things I don't really use.
author June Park <parkjune1995@gmail.com>
date Sun, 28 Dec 2025 20:34:22 -0800
parents 46daba6e3cf4
children
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import asyncio
from typing import Dict

class DistributedCache:

    def __init__(self):
        self._user_bucket_map: Dict[str, TokenBucket] = {}


    def get_bucket(self, user_id: str):
        return self._user_bucket_map[user_id]

    def set_bucket(self, user_id: str):
        self._user_bucket_map[user_id] = TokenBucket()


INITIAL_VALUES = 10

class TokenBucket:

    def __init__(self, initial_values = INITIAL_VALUES):
        self._tokens = initial_values
        self._refill_values = initial_values
        self._lock = asyncio.Lock()

    def get_tokens(self):
        print(self._tokens)
        return self._tokens

    async def consume_tokens(self, token: int):
        async with self._lock:
            if self.get_tokens() < token:
                return False

            await asyncio.sleep(1)
            self._tokens -=  token
            return True 

    async def refill_tokens(self):
        async with self._lock:
            self._tokens = self._refill_values


cache = DistributedCache()

user_1 = "JUNE"
user_2 = "VICTOR"
cache.set_bucket(user_1)
cache.set_bucket(user_2)

async def refill_token_bucket(user_id: str):
    await cache.get_bucket(user_id).refill_tokens()

async def use_tokens(user_id: str, tokens: int):
    return await cache.get_bucket(user_id).consume_tokens(tokens)

async def run():
    return_value = await asyncio.gather(
      use_tokens(user_1, 10),
      refill_token_bucket(user_1),
      use_tokens(user_1, 10),
      use_tokens(user_2, 10),
    )
    print(return_value)

if __name__ == "__main__":
    asyncio.run(run())