Custom context

[0xDjole]

I am trying to create custom context that gets reused between invocations.
Here specifically trying to reuse mongodb client.

 // ...initing mongo database

  let custom_context = CustomContext {
        mongo_database: Some(mongo_database),
   };

   lambda_runtime::run(handler_fn(|event: Request, ctx: Context| {
       execute(event, ctx, &custom_context)
   }))

Getting: Closure may outlive the current function, but it borrows custom_context, which is owned by the current function

Can handler_fn be used to support something like this?

[calavera]

Yes, See this example that shares custom resources: https://github.com/awslabs/aws-lambda-rust-runtime/blob/main/lambda-http/examples/shared-resources-example.rs

Your current code is bumping into Rust borrowing challenges. There is a good explanation on how it works here: https://blog.logrocket.com/introducing-the-rust-borrow-checker/