75 lines
2.5 KiB
Rust
75 lines
2.5 KiB
Rust
// SPDX-FileCopyrightText: Copyright (c) 2024-2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
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// SPDX-License-Identifier: Apache-2.0
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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use super::*;
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use crate::llm::model_card::ModelDeploymentCard;
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use llm_rs::protocols::common::llm_backend::{BackendOutput, PreprocessedRequest};
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use llm_rs::types::Annotated;
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use dynamo_runtime::pipeline::{Operator, ServiceBackend, ServiceFrontend, Source};
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use crate::engine::PythonAsyncEngine;
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#[pyclass]
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pub(crate) struct Backend {
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inner: Arc<llm_rs::backend::Backend>,
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endpoint: Endpoint,
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}
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#[pymethods]
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impl Backend {
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#[new]
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fn new(mdc: ModelDeploymentCard, endpoint: Endpoint) -> PyResult<Self> {
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let runtime = pyo3_async_runtimes::tokio::get_runtime();
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let backend = runtime
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.block_on(llm_rs::backend::Backend::from_mdc(mdc.inner))
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.map_err(to_pyerr)?;
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Ok(Self {
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inner: backend,
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endpoint,
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})
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}
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fn start<'p>(&self, py: Python<'p>, generator: PyObject) -> PyResult<Bound<'p, PyAny>> {
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let frontend = ServiceFrontend::<
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SingleIn<PreprocessedRequest>,
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ManyOut<Annotated<BackendOutput>>,
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>::new();
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let backend = self.inner.into_operator();
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let engine = Arc::new(PythonAsyncEngine::new(
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generator,
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self.endpoint.event_loop.clone(),
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)?);
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let engine = ServiceBackend::from_engine(engine);
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let pipeline = frontend
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.link(backend.forward_edge())
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.map_err(to_pyerr)?
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.link(engine)
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.map_err(to_pyerr)?
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.link(backend.backward_edge())
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.map_err(to_pyerr)?
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.link(frontend)
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.map_err(to_pyerr)?;
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let ingress = Ingress::for_engine(pipeline).map_err(to_pyerr)?;
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let builder = self.endpoint.inner.endpoint_builder().handler(ingress);
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pyo3_async_runtimes::tokio::future_into_py(py, async move {
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builder.start().await.map_err(to_pyerr)?;
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Ok(())
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})
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}
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}
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