Default Handler that Serverless Framework creates

DefaultHandler.kt

import com.amazonaws.services.lambda.runtime.Context
import com.amazonaws.services.lambda.runtime.RequestHandler
import org.apache.logging.log4j.LogManager

class Handler:RequestHandler<Map<String, Any>, ApiGatewayResponse> {
  override fun handleRequest(input:Map<String, Any>, context:Context):ApiGatewayResponse {
    LOG.info("received: " + input.keys.toString())

    return ApiGatewayResponse.build {
      statusCode = 200
      objectBody = HelloResponse("Go Serverless v1.x! Your Kotlin function executed successfully!", input)
      headers = mapOf("X-Powered-By" to "AWS Lambda & serverless")
    }
  }

  companion object {
    private val LOG = LogManager.getLogger(Handler::class.java)
  }
}