Create tables in local AWS dynamoDB besed on information from aws-sam template.yaml file using Java

Question

I have running local dynamoDB in Java integration tests

AmazonDynamoDBLocal embeddedDynamo = DynamoDBEmbedded.create()
AmazonDynamoDB client = embeddedDynamo.amazonDynamoDB();
DynamoDB dynamoDB = new DynamoDB(client);

Now I need to create tables based on definition in SAM template.yaml file. I can just copy that file on classpath using Gradle and parse it by some Java/Groovy tools and then just use parsed map to feed the DynamoDB instance API to create those tables.

But I am wondering if there is any library or tool that does it for me?

Thank you, Lukas

Answer 1

You will need to create it yourself. You can do this using a json file and the aws cli's dynamodb command, for example:

my-table.json

{
    "TableName": "MyTable",
    "KeySchema": [
      { "AttributeName": "Id", "KeyType": "HASH" }
    ],
    "AttributeDefinitions": [
      { "AttributeName": "Id", "AttributeType": "S" }
    ],
    "ProvisionedThroughput": {
      "ReadCapacityUnits": 1,
      "WriteCapacityUnits": 1
    }
}

aws cli's dynamodb create-table command example

aws dynamodb create-table --cli-input-json file://my-table.json --endpoint-url http://localhost:8000

Notes

• you can do this without the json file.
• more info in the docs here: https://docs.aws.amazon.com/cli/latest/reference/dynamodb/create-table.html