Method run

lambda-runtime/src/runtime.rs:364–375

Start the runtime and begin polling for events on the Lambda Runtime API. The runtime will process requests sequentially. # Managed concurrency If `AWS_LAMBDA_MAX_CONCURRENCY` is set, a warning is logged. If your handler can satisfy `Clone + Send + 'static`, prefer [`Runtime::run_concurrent`] (requires the `concurrency-tokio` feature), which honors managed concurrency and falls back to sequentia

(self)

    /// which honors managed concurrency and falls back to sequential behavior when
    /// unset.
    pub async fn run(self) -> Result<(), BoxError> {
        if let Some(raw) = concurrency_env_value() {
            log_or_print!(
                tracing: tracing::warn!(
                    "AWS_LAMBDA_MAX_CONCURRENCY is set to '{raw}', but the concurrency-tokio feature is not enabled; running sequentially",
                ),
                fallback: eprintln!("AWS_LAMBDA_MAX_CONCURRENCY is set to '{raw}', but the concurrency-tokio feature is not enabled; running sequentially")
            );
        }
        let incoming = incoming(&self.client);
        Self::run_with_incoming(self.service, self.config, incoming).await
    }

    /// Internal utility function to start the runtime with a customized incoming stream.
    /// This implements the core of the [Runtime::run] method.