forked from phoenix-oss/llama-stack-mirror
ec4fc800cc
This is yet another of those large PRs (hopefully we will have less and less of them as things mature fast). This one introduces substantial improvements and some simplifications to the stack. Most important bits: * Agents reference implementation now has support for session / turn persistence. The default implementation uses sqlite but there's also support for using Redis. * We have re-architected the structure of the Stack APIs to allow for more flexible routing. The motivating use cases are: - routing model A to ollama and model B to a remote provider like Together - routing shield A to local impl while shield B to a remote provider like Bedrock - routing a vector memory bank to Weaviate while routing a keyvalue memory bank to Redis * Support for provider specific parameters to be passed from the clients. A client can pass data using `x_llamastack_provider_data` parameter which can be type-checked and provided to the Adapter implementations.
74 lines
2.5 KiB
Python
74 lines
2.5 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 importlib
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from typing import Any, Dict
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from llama_stack.distribution.datatypes import * # noqa: F403
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from termcolor import cprint
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def instantiate_class_type(fully_qualified_name):
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module_name, class_name = fully_qualified_name.rsplit(".", 1)
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module = importlib.import_module(module_name)
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return getattr(module, class_name)
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# returns a class implementing the protocol corresponding to the Api
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async def instantiate_provider(
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provider_spec: ProviderSpec,
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deps: Dict[str, Any],
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provider_config: Union[GenericProviderConfig, RoutingTable],
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):
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module = importlib.import_module(provider_spec.module)
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args = []
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if isinstance(provider_spec, RemoteProviderSpec):
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if provider_spec.adapter:
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method = "get_adapter_impl"
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else:
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method = "get_client_impl"
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assert isinstance(provider_config, GenericProviderConfig)
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config_type = instantiate_class_type(provider_spec.config_class)
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config = config_type(**provider_config.config)
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args = [config, deps]
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elif isinstance(provider_spec, AutoRoutedProviderSpec):
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method = "get_auto_router_impl"
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config = None
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args = [provider_spec.api, deps[provider_spec.routing_table_api], deps]
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elif isinstance(provider_spec, RoutingTableProviderSpec):
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method = "get_routing_table_impl"
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assert isinstance(provider_config, List)
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routing_table = provider_config
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inner_specs = {x.provider_id: x for x in provider_spec.inner_specs}
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inner_impls = []
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for routing_entry in routing_table:
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impl = await instantiate_provider(
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inner_specs[routing_entry.provider_id],
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deps,
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routing_entry,
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)
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inner_impls.append((routing_entry.routing_key, impl))
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config = None
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args = [provider_spec.api, inner_impls, routing_table, deps]
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else:
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method = "get_provider_impl"
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assert isinstance(provider_config, GenericProviderConfig)
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config_type = instantiate_class_type(provider_spec.config_class)
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config = config_type(**provider_config.config)
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args = [config, deps]
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fn = getattr(module, method)
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impl = await fn(*args)
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impl.__provider_spec__ = provider_spec
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impl.__provider_config__ = config
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return impl
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