The official Rust runtime for AWS Lambda.
There are two mechanisms available for defining a Lambda function:
- The
lambdaattribute macro, which generates the boilerplate to launch and run a Lambda function.
The [#[lambda]] attribute must be placed on an asynchronous main function.
However, as asynchronous main functions are not legal valid Rust
this means that the main function must also be decorated using a
[#[tokio::main]] attribute macro. This is available from
the [Tokio] crate.
- A type that conforms to the
Handlertrait. This type can then be passed to the thenetlify_lambda::runfunction, which launches and runs the Lambda runtime.
An asynchronous function annotated with the #[lambda] attribute must
accept an argument of type A which implements [serde::Deserialize], a lambda::Context and
return a Result<B, E>, where B implements [serde::Serializable]. E is
any type that implements Into<Box<dyn std::error::Error + Send + Sync + 'static>>.
use netlify_lambda::{lambda, Context};
use serde_json::Value;
type Error = Box<dyn std::error::Error + Send + Sync + 'static>;
#[lambda]
#[tokio::main]
async fn main(event: Value, _: Context) -> Result<Value, Error> {
Ok(event)
}
[#[tokio::main]]: https://docs.rs/tokio/0.2.21/tokio/attr.main.html
[Tokio]: https://docs.rs/tokio/