github.com/apex/go-apex

Apex Golang

Golang runtime support for Apex/Lambda – providing handlers for Lambda sources, and runtime requirements such as implementing the Node.js shim stdio interface.

Features

Currently supports:

• Node.js shim
• Environment variable population
• Arbitrary JSON
• CloudWatch Logs
• Cognito
• Kinesis
• Dynamo
• S3
• SNS
• SES

Example

package main

import (
  "encoding/json"
  "strings"

  "github.com/apex/go-apex"
)

type message struct {
  Value string `json:"value"`
}

func main() {
  apex.HandleFunc(func(event json.RawMessage, ctx *apex.Context) (interface{}, error) {
    var m message

    if err := json.Unmarshal(event, &m); err != nil {
      return nil, err
    }

    m.Value = strings.ToUpper(m.Value)

    return m, nil
  })
}

Run the program:

echo '{"event":{"value":"Hello World!"}}' | go run main.go
{"value":{"value":"HELLO WORLD!"}}

Notes

Due to the Node.js shim required to run Go in Lambda, you must use stderr for logging – stdout is reserved for the shim.

Badges

tjholowaychuk.com  ·  GitHub @tj  ·  Twitter @tjholowaychuk