Simple example of how to use Local dynamodb with Ruby

startLocalDb.sh

#!/bin/bash
#Assuming you have downloading dynamoDBLocal and extracted into a dir called dynamodbLocal
java -Djava.library.path=./dynamodbLocal/DynamoDBLocal_lib -jar ./dynamodbLocal/DynamoDBLocal.jar -inMemory -port 9010

testLocalDynamoDb.rb

require 'aws-sdk-core'

dynamo_db = Aws::DynamoDB::Client.new(region: "eu-west-1", endpoint: 'http://localhost:9010')
	dynamo_db.create_table({
	table_name: 'TestDB',
	attribute_definitions: [{
		attribute_name: 'SomeKey',
		attribute_type: 'S'
	},
	{
		attribute_name: 'epochMillis',
		attribute_type: 'N'
	}
	],
	key_schema: [{
		attribute_name: 'SomeKey',
		key_type: 'HASH'
	},
	{
		attribute_name: 'epochMillis',
		key_type: 'RANGE'
	}
	],
	provisioned_throughput: {
		read_capacity_units: 5,
		write_capacity_units: 5
	}
	})
dynamo_db.put_item( table_name: "TestDB",
	item: { 
	"SomeKey" => "somevalue1", 
	"epochMillis" => 1
})
puts dynamo_db.get_item({
	table_name: "TestDB",
	key: { 
	"SomeKey" => "somevalue",
	"epochMillis" => 1
}}).item