Type definition and utility to implement AWS Lambda functions in Scala.js

aws-lambda-scalajs-facade

A set of type definition and utility to implement AWS Lambda functions.

This is NOT a type definition for AWS Lambda API in aws-sdk-js. It can be found in aws-sdk-scalajs-facade.

exoego/scala-js-nodejs offers type definition and utilities for Node.js API.

Support matrix

ScalaJS 0.6.28+ ScalaJS 1.x
Scala 2.13 ✔️ (0.9.0 was final) ✔️
Scala 2.12 ✔️ (0.9.0 was final) ✔️ (0.11.0 was final)
Scala 2.11 N/A N/A
Scala 2.10 N/A N/A
  • ✔️ Supported
  • 🚧 Not supported but planned

How to use

Add dependency in build.sbt.

libraryDependencies += "net.exoego" %%% "aws-lambda-scalajs-facade" % "0.12.1"

Import and code.

import scala.concurrent.{ExecutionContext, Future}
import scala.scalajs.js
import scala.scalajs.js.JSConverters._
import scala.scalajs.js.annotation._
import net.exoego.facade.aws_lambda._

object Main {
  @JSExportTopLevel("handler")
  val handler: AsyncAPIGatewayProxyHandler = (event, context) => {
    val json = js.JSON.stringify(event)
    js.Dynamic.global.console.log(json)

    implicit val ec = ExecutionContext.global
    handle(event).toJSPromise
  }

  private def handle(event: APIGatewayProxyEvent)(implicit ec: ExecutionContext): Future[APIGatewayProxyResult] = Future {
    APIGatewayProxyResult(
      statusCode = 200,
      body = "hello " + event.body,
      headers = js.defined(js.Dictionary("Content-Type" -> "text/plain"))
    )
  }
}

Some of pre-defined handler traits:

  • APIGatewayProxyHandlerV2
  • AppSyncResolverHandler
  • DynamoDBStreamHandler
  • S3Handler
  • SNSHandler

Each has Async~ variant that returns js.Promise instead of accepting callback.

License