llama-stack/llama_stack/providers/utils/kvstore/redis/redis.py
Sarthak Deshpande ec8601ce88
Replaced zrangebylex method in the range method (#521)
# What does this PR do?

In short, provide a summary of what this PR does and why. Usually, the
relevant context should be present in a linked issue.

- [Currently redis as a kvstore is bugged, as the range method uses
zrangebylex method. zrangebylex method is used when it is a sorted set
but we are storing the value using .set method in the redis. This causes
an error. Another issue is that zrangebylex method takes 3 args but only
2 are mentioned in the range method. This causes a runtime error. That
method has been replaced with the current implementation in the PR ]
Addresses issue (#520 )


## Test Plan

Please describe:
 - tests you ran to verify your changes with result summaries.
 - provide instructions so it can be reproduced.
`python llama_stack/apis/agents/client.py localhost 8001 tools_llama_3_1
meta-llama/Llama-3.1-70B-Instruct`
<img width="1711" alt="Screenshot 2024-11-25 at 2 59 55 PM"
src="https://github.com/user-attachments/assets/c2551555-bc73-4427-b09b-c86d6deb2956">
<img width="634" alt="Screenshot 2024-11-25 at 3 00 33 PM"
src="https://github.com/user-attachments/assets/a087718f-fc2a-424b-b096-4ecad08a07bf">

Have used redis in the run.yaml file as well for the persistence_store.
Also enable_session_persistence turned to True for this test.
Have also tested this in a jupyter notebook to make sure the current
flow does not work through multiple turns in the same session.

## Sources

Please link relevant resources if necessary.


## Before submitting

- [ ] This PR fixes a typo or improves the docs (you can dismiss the
other checks if that's the case).
- [x] Ran pre-commit to handle lint / formatting issues.
- [x] Read the [contributor
guideline](https://github.com/meta-llama/llama-stack/blob/main/CONTRIBUTING.md),
      Pull Request section?
- [ ] Updated relevant documentation.
- [ ] Wrote necessary unit or integration tests.
2025-01-11 22:04:34 -08:00

74 lines
2.3 KiB
Python

# Copyright (c) Meta Platforms, Inc. and affiliates.
# All rights reserved.
#
# This source code is licensed under the terms described in the LICENSE file in
# the root directory of this source tree.
from datetime import datetime
from typing import List, Optional
from redis.asyncio import Redis
from ..api import KVStore
from ..config import RedisKVStoreConfig
class RedisKVStoreImpl(KVStore):
def __init__(self, config: RedisKVStoreConfig):
self.config = config
async def initialize(self) -> None:
self.redis = Redis.from_url(self.config.url)
def _namespaced_key(self, key: str) -> str:
if not self.config.namespace:
return key
return f"{self.config.namespace}:{key}"
async def set(
self, key: str, value: str, expiration: Optional[datetime] = None
) -> None:
key = self._namespaced_key(key)
await self.redis.set(key, value)
if expiration:
await self.redis.expireat(key, expiration)
async def get(self, key: str) -> Optional[str]:
key = self._namespaced_key(key)
value = await self.redis.get(key)
if value is None:
return None
ttl = await self.redis.ttl(key)
return value
async def delete(self, key: str) -> None:
key = self._namespaced_key(key)
await self.redis.delete(key)
async def range(self, start_key: str, end_key: str) -> List[str]:
start_key = self._namespaced_key(start_key)
end_key = self._namespaced_key(end_key)
cursor = 0
pattern = start_key + "*" # Match all keys starting with start_key prefix
matching_keys = []
while True:
cursor, keys = await self.redis.scan(cursor, match=pattern, count=1000)
for key in keys:
key_str = key.decode("utf-8") if isinstance(key, bytes) else key
if start_key <= key_str <= end_key:
matching_keys.append(key)
if cursor == 0:
break
# Then fetch all values in a single MGET call
if matching_keys:
values = await self.redis.mget(matching_keys)
return [
value.decode("utf-8") if isinstance(value, bytes) else value
for value in values
if value is not None
]
return []