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[router] grpc router bootstraps (#9759)  
Simo Lin committed
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// gRPC Router Implementation
// TODO: Implement gRPC-based router

use crate::routers::{RouterTrait, WorkerManagement};
use async_trait::async_trait;
use axum::{
    body::Body,
    extract::Request,
    http::{HeaderMap, StatusCode},
    response::{IntoResponse, Response},
};

/// Placeholder for gRPC router
#[derive(Debug)]
pub struct GrpcRouter;

impl GrpcRouter {
    pub async fn new() -> Result<Self, String> {
        // TODO: Implement gRPC router initialization
        Err("gRPC router not yet implemented".to_string())
    }
}

#[async_trait]
impl RouterTrait for GrpcRouter {
    fn as_any(&self) -> &dyn std::any::Any {
        self
    }

    async fn health(&self, _req: Request<Body>) -> Response {
        (StatusCode::NOT_IMPLEMENTED).into_response()
    }

    async fn health_generate(&self, _req: Request<Body>) -> Response {
        (StatusCode::NOT_IMPLEMENTED).into_response()
    }

    async fn get_server_info(&self, _req: Request<Body>) -> Response {
        (StatusCode::NOT_IMPLEMENTED).into_response()
    }

    async fn get_models(&self, _req: Request<Body>) -> Response {
        (StatusCode::NOT_IMPLEMENTED).into_response()
    }

    async fn get_model_info(&self, _req: Request<Body>) -> Response {
        (StatusCode::NOT_IMPLEMENTED).into_response()
    }

    async fn route_generate(
        &self,
        _headers: Option<&HeaderMap>,
        _body: &crate::protocols::spec::GenerateRequest,
    ) -> Response {
        (StatusCode::NOT_IMPLEMENTED).into_response()
    }

    async fn route_chat(
        &self,
        _headers: Option<&HeaderMap>,
        _body: &crate::protocols::spec::ChatCompletionRequest,
    ) -> Response {
        (StatusCode::NOT_IMPLEMENTED).into_response()
    }

    async fn route_completion(
        &self,
        _headers: Option<&HeaderMap>,
        _body: &crate::protocols::spec::CompletionRequest,
    ) -> Response {
        (StatusCode::NOT_IMPLEMENTED).into_response()
    }

    async fn route_embeddings(&self, _headers: Option<&HeaderMap>, _body: Body) -> Response {
        (StatusCode::NOT_IMPLEMENTED).into_response()
    }

    async fn route_rerank(&self, _headers: Option<&HeaderMap>, _body: Body) -> Response {
        (StatusCode::NOT_IMPLEMENTED).into_response()
    }

    async fn flush_cache(&self) -> Response {
        (StatusCode::NOT_IMPLEMENTED).into_response()
    }

    async fn get_worker_loads(&self) -> Response {
        (StatusCode::NOT_IMPLEMENTED).into_response()
    }

    fn router_type(&self) -> &'static str {
        "grpc"
    }

    fn readiness(&self) -> Response {
        (StatusCode::SERVICE_UNAVAILABLE).into_response()
    }
}

#[async_trait]
impl WorkerManagement for GrpcRouter {
    async fn add_worker(&self, _worker_url: &str) -> Result<String, String> {
        Err("Not implemented".to_string())
    }

    fn remove_worker(&self, _worker_url: &str) {}

    fn get_worker_urls(&self) -> Vec<String> {
        vec![]
    }
}