DynamoDB is a fully managed no-sql database available on Amazon AWS that can be easily configured to use as a state repository for togglz.
To use DynamoDB as a state repository with togglz, you must provision a table in the AWS.
To do this from the command line (change your table name out for the one you want to use):
aws dynamodb create-table --table-name YOUR_TABLE_NAME \
--region=us-west-1 \
--attribute-definitions AttributeName=featureName,AttributeType=S \
--key-schema AttributeName=featureName,KeyType=HASH \
--provisioned-throughput ReadCapacityUnits=5,WriteCapacityUnits=5
Then create a state repository with togglz:
For example, using it in combination with the spring-boot autoconfiguration you only need to provide the
StateRepository instance - which relies on being passed in a configured AmazonDynamoDBClient instance
@Bean
AWSCredentials awsCredentials() {
return new InstanceProfileCredentialsProvider().getCredentials();
}
@Bean
public AmazonDynamoDBClient dynamoDBClient(AWSCredentials credentials) {
return new AmazonDynamoDBClient(credentials);
}
@Bean
public DynamoDBStateRepository dynamoDBStateRepository(AmazonDynamoDBClient amazonDynamoDBClient) {
return new DynamoDBStateRepository.DynamoDBStateRepositoryBuilder(amazonDynamoDBClient).withStateStoredInTable("togglz").build();
}To decrease reads from the dynamo tables, you can wrap the state repository with a caching one - like this example which caches for 30 seconds:
@Bean
public StateRepository stateRepository(AmazonDynamoDBClient amazonDynamoDBClient) {
DynamoDBStateRepository dynamoDBStateRepository = new DynamoDBStateRepository.DynamoDBStateRepositoryBuilder(amazonDynamoDBClient).withStateStoredInTable("togglz").build();
return new CachingStateRepository(dynamoDBStateRepository, 30, TimeUnit.SECONDS);
}