68 lines
2.3 KiB
Python
68 lines
2.3 KiB
Python
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# SPDX-License-Identifier: Apache-2.0
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# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
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from abc import ABC, abstractmethod
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from collections.abc import AsyncGenerator, Sequence
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from typing import Any, Generic, Optional, TypeVar, Union
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from vllm.config import VllmConfig
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from vllm.entrypoints.openai.protocol import IOProcessorResponse
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from vllm.inputs.data import PromptType
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from vllm.outputs import PoolingRequestOutput
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IOProcessorInput = TypeVar('IOProcessorInput')
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IOProcessorOutput = TypeVar('IOProcessorOutput')
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class IOProcessor(ABC, Generic[IOProcessorInput, IOProcessorOutput]):
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def __init__(self, vllm_config: VllmConfig):
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self.vllm_config = vllm_config
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@abstractmethod
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def pre_process(
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self,
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prompt: IOProcessorInput,
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request_id: Optional[str] = None,
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**kwargs,
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) -> Union[PromptType, Sequence[PromptType]]:
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raise NotImplementedError
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async def pre_process_async(
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self,
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prompt: IOProcessorInput,
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request_id: Optional[str] = None,
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**kwargs,
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) -> Union[PromptType, Sequence[PromptType]]:
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return self.pre_process(prompt, request_id, **kwargs)
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@abstractmethod
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def post_process(self,
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model_output: Sequence[PoolingRequestOutput],
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request_id: Optional[str] = None,
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**kwargs) -> IOProcessorOutput:
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raise NotImplementedError
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async def post_process_async(
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self,
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model_output: AsyncGenerator[tuple[int, PoolingRequestOutput]],
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request_id: Optional[str] = None,
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**kwargs,
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) -> IOProcessorOutput:
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# We cannot guarantee outputs are returned in the same order they were
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# fed to vLLM.
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# Let's sort them by id before post_processing
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sorted_output = sorted([(i, item) async for i, item in model_output],
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key=lambda output: output[0])
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collected_output = [output[1] for output in sorted_output]
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return self.post_process(collected_output, request_id, **kwargs)
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@abstractmethod
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def parse_request(self, request: Any) -> IOProcessorInput:
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raise NotImplementedError
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@abstractmethod
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def output_to_response(
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self, plugin_output: IOProcessorOutput) -> IOProcessorResponse:
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raise NotImplementedError
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