How to start another task along with tonic server

[sunliang711]

Hello, I'm a newbie of rust. I'm using tonic library to start a grpc server (the grpc server receives requests and then push the request data to a queue) and before starting the server, I want to start another task to consume the queue,it is an infinite loop.

use controller::controller_server::ControllerServer;
use std::sync::Arc;
use tokio::sync::Mutex;
use tonic::transport::Server;

pub mod codec;
pub mod controller;
pub mod error;
pub mod executor;
pub mod mq;
pub mod translate;
pub mod utils;

mod controller_proto {
    include!("controller.rs");

    pub(crate) const FILE_DESCRIPTOR_SET: &[u8] =
        tonic::include_file_descriptor_set!("controller_descriptor");
}

#[tokio::main]
async fn main() -> anyhow::Result<()> {
    env_logger::init();

    let cfg = executor::ExecutorConfig::from_env()?;

    let addr = format!("0.0.0.0:{}", cfg.port);
    let mut executor = executor::Executor::from_config(cfg)?;

    let reflection_service = tonic_reflection::server::Builder::configure()
        .register_encoded_file_descriptor_set(controller_proto::FILE_DESCRIPTOR_SET)
        .build()
        .unwrap();

    tokio::spawn(executor.start());

    log::info!("executor listen on: {}", addr);
    Server::builder()
        .add_service(ControllerServer::new(executor))
        .add_service(reflection_service)
        .serve(addr.parse()?)
        .await?;

    Ok(())
}                                                                                                                               

But the code did not compiled, the compiler says: "cannot move out of executor because it is borrowed" what should I do ?