aws-dynamodb-lambda-trigger

aws-dynamodb-lambda-trigger

Cleans up the code you need to run a DynamoDB trigger on AWS Lambda.

var trigger = require('aws-dynamodb-lambda-trigger')

// regular lambda fn business here
exports.handler = function myLambdaTriggerForTableName(event, context) {

  // register a handler for inserts
  trigger.insert(event, context, function handleInsert(record, callback) {
    console.log(record)
    callback()
  })
}

api

• trigger.insert(event, context, handler) register a handler for INSERT
• trigger.modify(event, context, handler) register a handler for MODIFY
• trigger.remove(event, context, handler) register a handler for REMOVE
• trigger.all(event, context, handler) register a handler for INSERT, MODIFY and REMOVE
• trigger.save(event, context, handler) register a handler for INSERT, MODIFY
• trigger.change(event, context, handler) register a handler for INSERT and REMOVE

In all cases the handler is a function with the following signature:

function handleSave(record, callback) {
  // do something with record and then callback node-style
  // if an err is passed to the callback it will be passed to context.fail
  callback(null, record)
}

even CLEANER api

var trigger = require('aws-dynamodb-lambda-trigger/lambda')

// runs on every record inserted
function handler(record, callback) {
  callback()
}

exports.handler = trigger.insert(handler)