AWS tutorial: DynamoDB part 2

Mon, 12 Dec 2016 00:00:00 +0000

In the previous tutorial I showed you how to use AWS Lambda and API Gateway to insert items in a DynamoDB table. The example implemented a function which stored the location of the user. In this tutorial we create a Lambda function which retrieves this data from the DynamoDB table and expose this functionality over HTTP using API Gateway.

Create a DynamoDB Global Secondary Index

The DeviceLocation DynamoDB table uses the id as partition key. To retrieve the locations for a given device, a global secondary index must be created to query on deviceId.

AWS tutorial: DynamoDB part 1

Fri, 02 Dec 2016 00:00:00 +0000

In this post I am going through a full (Java) example of integrating AWS Lambda, DynamoDb and Api Gateway to create a function and expose this function as a HTTP resource for other parties to consume.

Before we dive into the details I will give a brief overview of the AWS services used in this example (as taken from the AWS documentation):

AWS Lambda. AWS Lambda is a compute service that runs developers’ code in response to events and automatically manages the compute resources for them, making it easy to build applications that respond quickly to new information.
DynamoDB: Fast and flexible, managed, NoSql database.
Api Gateway: Amazon API Gateway is a fully managed service that makes it easy for developers to create, publish, maintain, monitor, and secure APIs at any scale.

In this example we are going to create a lambda function which tracks the location (latitude and longitude) of a specific mobile device. The data flow looks like this:

AWS on Jamie Craane personal blog

AWS tutorial: DynamoDB part 2

AWS tutorial: DynamoDB part 1