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This guide will show you how to create a Cluster into ScyllaDB Cloud, create an Media Player app from scratch and configure it to use Scylla as the backend datastore. It’ll walk you through all the stages of the development process, from gathering requirements to building and running the application.
As an example, you will use an application called Media Player. Media Player stores all the tracks that you want to listen and count how many times you listened to. The application consists of three parts:
Validate if you have the Keyspace and Table needed to start storing your tracks/songs;
Access to an REPL with commands to store/list/delete songs;
Run a simple stresser into ScyllaDB Cloud.
Before start your first project with Scylla Alternator API, we need to setup your environment.
Before you start coding the project, you should create an account at ScyllaDB Cloud or login if you already have one.
After create and login into your ScyllaDB Cloud account, click on “New Cluster” tab. There, you should:
Give your cluster a cool name for this project;
Select “ScyllaDB Alternator - DynamoDB API ” on the Scylla Version;
Select the nearest region for your cluster.
After that, check the “t3.micro” model (Sandbox) and click in “Next”.
On the network tab, just make sure that your IP Address is correct and click in “Launch Cluster”.
Now that you have the ScyllaDB Alternator running, you will see a panel like the picture below. It will be a three node cluster.
As you can see on the first node, the ip “18.231.92.93” will be used to connect on the “Endpoint URL” at any DynamoDB SDK or API.
Examples:
# Python Example
import boto3
alternator_client = boto3.resource('dynamodb',endpoint_url='http://localhost:8000',
region_name='None', aws_access_key_id='None', aws_secret_access_key='None')
// PHP with AWS SDK
use Aws\DynamoDb\DynamoDbClient;
$alternatorClient = new DynamoDbClient([
'endpoint' => "18.231.92.93:8000", // Alternator
'credentials' => ['key' => 'None', 'secret' => 'None'],
'region' => 'None'
]);
Now you are able to send requests to your ScyllaDB Alternator instance! Select the SDK on the language of your preference and happy coding!
Now that you have everything ready, let’s move to the project Design and Data Model with DynamoDB spectations!
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