mirror of
https://github.com/meta-llama/llama-stack.git
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128 lines
3.8 KiB
Python
128 lines
3.8 KiB
Python
# Copyright (c) Meta Platforms, Inc. and affiliates.
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# All rights reserved.
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#
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# This source code is licensed under the terms described in the LICENSE file in
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# the root directory of this source tree.
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import json
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import logging
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import uuid
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from typing import AsyncGenerator
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from llama_stack.apis.inference import Inference
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from llama_stack.apis.memory import Memory
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from llama_stack.apis.safety import Safety
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from llama_stack.apis.agents import * # noqa: F403
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from llama_stack.providers.utils.kvstore import InmemoryKVStoreImpl, kvstore_impl
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from .agent_instance import ChatAgent
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from .config import MetaReferenceAgentsImplConfig
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logger = logging.getLogger()
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logger.setLevel(logging.INFO)
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class MetaReferenceAgentsImpl(Agents):
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def __init__(
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self,
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config: MetaReferenceAgentsImplConfig,
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inference_api: Inference,
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memory_api: Memory,
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safety_api: Safety,
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):
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self.config = config
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self.inference_api = inference_api
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self.memory_api = memory_api
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self.safety_api = safety_api
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self.in_memory_store = InmemoryKVStoreImpl()
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async def initialize(self) -> None:
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self.persistence_store = await kvstore_impl(self.config.persistence_store)
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async def create_agent(
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self,
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agent_config: AgentConfig,
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) -> AgentCreateResponse:
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agent_id = str(uuid.uuid4())
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await self.persistence_store.set(
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key=f"agent:{agent_id}",
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value=agent_config.json(),
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)
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return AgentCreateResponse(
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agent_id=agent_id,
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)
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async def get_agent(self, agent_id: str) -> ChatAgent:
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agent_config = await self.persistence_store.get(
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key=f"agent:{agent_id}",
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)
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if not agent_config:
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raise ValueError(f"Could not find agent config for {agent_id}")
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try:
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agent_config = json.loads(agent_config)
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except json.JSONDecodeError as e:
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raise ValueError(
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f"Could not JSON decode agent config for {agent_id}"
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) from e
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try:
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agent_config = AgentConfig(**agent_config)
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except Exception as e:
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raise ValueError(
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f"Could not validate(?) agent config for {agent_id}"
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) from e
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return ChatAgent(
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agent_id=agent_id,
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agent_config=agent_config,
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inference_api=self.inference_api,
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safety_api=self.safety_api,
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memory_api=self.memory_api,
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persistence_store=(
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self.persistence_store
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if agent_config.enable_session_persistence
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else self.in_memory_store
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),
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)
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async def create_agent_session(
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self,
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agent_id: str,
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session_name: str,
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) -> AgentSessionCreateResponse:
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agent = await self.get_agent(agent_id)
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session_id = await agent.create_session(session_name)
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return AgentSessionCreateResponse(
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session_id=session_id,
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)
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async def create_agent_turn(
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self,
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agent_id: str,
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session_id: str,
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messages: List[
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Union[
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UserMessage,
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ToolResponseMessage,
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]
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],
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attachments: Optional[List[Attachment]] = None,
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stream: Optional[bool] = False,
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) -> AsyncGenerator:
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agent = await self.get_agent(agent_id)
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# wrapper request to make it easier to pass around (internal only, not exposed to API)
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request = AgentTurnCreateRequest(
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agent_id=agent_id,
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session_id=session_id,
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messages=messages,
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attachments=attachments,
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stream=stream,
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)
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async for event in agent.create_and_execute_turn(request):
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yield event
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