LambdaQueue

What

This package lets you supply a list of JSON payloads to an AWS Lambda function, managing concurrency so that you do not exceed AWS concurrency limits.

Install

npm install lambda-queue

Example

1. Create an AWS credentials file and save as aws.json. eg.

   { "accessKeyId": "***", "secretAccessKey": "***",
   "region": "***" }
   

2. Create a set of JSON payloads for your lambda function and save as an array of objects in payloads.json

3. Use the package as follows:

   // Load LambdaQueue class
   var LambdaQueue = require('lambda-queue');
   // Load payloads
   var payloads = require("./payloads.json");
   // Load AWS Config
   var awsConfigPath = __dirname + "/aws.json";
   var queue = new LambdaQueue({
   awsConfigPath: awsConfigPath,
   lambdaFunctionName: 'hello-world',
   payloads: payloads, // Expects Array
   concurrency: 20, onTick: counts => {
   // gets called every time a lambda function returns
   console.log(counts)
   },
   onComplete: results => {
   // gets called once every lambda function has returned
   console.log(results)
   }
   });
   

License

Copyright © 2017 Alan Thomson as.thomson@gmail.com

This work is free. You can redistribute it and/or modify it under the terms of the MIT License. See LICENSE for full details.