Clojurians Log v2

If you use something other than InputStream/OutputStream as parameters to function, lambda will try to convert JSON to java classes.

https://github.com/jsyrjala/aws-lambda-serverless

Most likely you’ll want to read input from a InputStream, and then parse it as JSON or END. If you go via lambda’s automatic JSON parsing, you’ll get java classes.

Thanks @jsyrjala I’ll try it

@jsyrjala why in your template you state to AWS that you are receiving 2 parameters [InputStream OutputStream] And that you return void I thought I’d receive only one parameter, the InputStream and my output would be a OutputStream

that is how JVM lambdas work if you want to parse request yourself

Hi. How can I quickly parse the input parameters in the handler function? It does not seem to a map I can destructure with keywords

(defn -handler
  [this input context] ... )

parse input with e.g https://github.com/dakrone/cheshire

thanks. when I print the input params it's {operation=echo, message=Hello world!} When I query its type it's java.util.LinkedHashMap. Doesn't look like json : )

here built in jvm lambda framework has parsed incoming json to a Java LinkedHashMap object before calling your handler function.

basically you can either use parameters [InputStream OutputStream] and handle JSON -> clojure datastructure parsing and clojure -> JSON response generation your self. Or use automatic conversion from JSON to Java classes and back to JSON. I have preferred the former.

Interesting approach, thank you. I guess what I really need is clj version of js->clj :keywordize-keys true

Great, ty, will give it try