NodeJS Local example with DynamoDB/Docker

README.md

NodeJS Local Examples with DynamoDB/Docker

Some samples to test DynamoDB locally through Docker

  # Download & Run LocalStack
  $ docker pull localstack/localstack:latest
  $ docker run -it -p 4567-4578:4567-4578 -p 8080:8080 localstack/localstack
  
  # Add some fake credentials locally
  $ vi ~/.aws/credentials

  # Data to include >>>>>>>>>>>>>>>>>>>>>>>>>>>>
  [fake]
  region = eu-west-1
  aws_access_key_id = **NOT_REAL**
  aws_secret_access_key = **FAKE_UNUSED_CREDS**
  # Data to include <<<<<<<<<<<<<<<<<<<<<<<<<<<<

  npm i aws-sdk
  node nodejs-dynamodb-create-table-local.js
  node nodejs-dynamodb-populate-table-local.js
  node nodejs-dynamodb-read-table-local.js

And you can also view the new dynamoDB resource created at local dashboard

nodejs-dynamodb-create-table-local.js

/**
 * Inspired on: https://github.com/gkatzioura/egkatzioura.wordpress.com/tree/master/DynamoDBTutorialNode
 */

const AWS = require("aws-sdk")

// URI and other properties could be load by ENV Vars or by property file (.env)
AWS.config.update({
  region: "us-west-2",
  endpoint: "http://localhost:4569"
  })

const dynamodb = new AWS.DynamoDB()

const params = {
    TableName : "Users",
    KeySchema: [{ AttributeName: "email", KeyType: "HASH"}],
    AttributeDefinitions: [{ AttributeName: "email", AttributeType: "S" }],
    ProvisionedThroughput: {
      ReadCapacityUnits: 5,
      WriteCapacityUnits: 5
    }
}

dynamodb.createTable(params, console.log)

nodejs-dynamodb-populate-table-local.js

/**
 * Inspired on: https://github.com/gkatzioura/egkatzioura.wordpress.com/tree/master/DynamoDBTutorialNode
 */

const AWS = require("aws-sdk")

// URI and other properties could be load by ENV Vars or by property file (.env)
AWS.config.update({
    region: "us-west-2",
    endpoint: "http://localhost:4569"
})

const dynamodb = new AWS.DynamoDB()

var params = {
    TableName:"Users",
    Item: {
        email : { S:"jon@doe.com"},
        fullname: { S:"Jon Doe" },
        role: { S:"Super Heroe" }
    }
};

dynamodb.putItem(params,console.log)

nodejs-dynamodb-read-table-local.js

/**
 * Inspired on: https://github.com/gkatzioura/egkatzioura.wordpress.com/tree/master/DynamoDBTutorialNode
 */

const AWS = require("aws-sdk")

// URI and other properties could be load by ENV Vars or by property file (.env)
AWS.config.update({
    region: "us-west-2",
    endpoint: "http://localhost:4569"
})

const docClient = new AWS.DynamoDB.DocumentClient()
const email = process.env.EMAIL || 'jon@doe.com'

const params = {
    TableName: "Users",
    KeyConditionExpression: "#email = :email",
    ExpressionAttributeNames:{
        "#email": "email"
    },
    ExpressionAttributeValues: {
        ":email":email
    }
}

docClient.query(params,console.log)