dynamo-butter

dynamo-butter

If you are going to use the AWS "Thick" Client, you might as well add butter

dynamo-butter is inspired by the AWS Dynamo Thin Client. It uses util.promsify of the client methods, adds the same Quality-of-Life methods (e.g. batchGetAll), and sets up the keep-alive agent by default.

Since AWS Lambda provides aws-sdk by default, this library does not declare a dependency on it. However, it is required. If you need to run unit tests, make sure to add aws-sdk to your own devDepdendencies.

Installation

npm i dynamo-butter

Quick Start

const Butter = require('dynamo-butter')
const client = Butter.up({ region: 'us-west-2' })
const data = await client.scanAll({ TableName: 'some-table' })

API

dynamo-butter exports one method: up(). Which can be used in two different modes. The first parameter depends on the mode, while the second parameter provides config options to dynamo-butter.

Configuration-Passthrough Mode

Uses the recommended defaults, with a configuration object that is passed to the DynamoDB DocumentClient constructor.

const Butter = require('dynamo-butter')
const client = Butter.up({
  region: 'us-west-2',
  endpoint: IS_TESTING && TEST_SERVER_ENDPOINT,
  convertEmptyValues: true // optional, defaults to true
})

Client-Wrap Mode

If you want to configure the DynamoDB DocumentClient yourself, you can pass it to butter instead of a config object.

const Butter = require('dynamo-butter')
const Dynamo = require('aws-sdk/clients/dynamodb')
const dynamo = new Dynamo.DocumentClient({
  convertEmptyValues,
  service: new Dynamo({
    region,
    endpoint
  })
})
const client = Butter.up(dynamo)

Config Options

The second parameter to Butter.up() is an options object for butter. It is optional, and each property is optional and defaults to true.

• includeAutoPagingMethods: set to false to not add batchWriteAll batchGetAll queryAll and scanAll to the client.
• useKeepAlive: set to false to disable keepAlive on the configured agent.

const client = Butter.up({
  region: 'us-west-2',
  endpoint: IS_TESTING && TEST_SERVER_ENDPOINT,
  convertEmptyValues: true // optional, defaults to true
}, {
  includeAutoPagingMethods: true,
  useKeepAlive: true
}