DynamoDB and TableNameOverride with prefix

Question

I am testing DynamoDB tables and want to set up different table names for prod and dev environment using the prefix \"dev_\" for development.

I made this test to print t

Answer 1

Same as Paolo Almeidas solution, just with Spring-Boot annotations. Just wanted to share it and maybe save someone time:

I have dynamodb tables for each namespace, e.g. myApp-dev-UserTable, myApp-prod-UserTable and I am using the EKS_NAMESPACE env variable, which in my case gets injected into the pods by kubernetes.

import com.amazonaws.services.dynamodbv2.AmazonDynamoDB;
import com.amazonaws.services.dynamodbv2.AmazonDynamoDBClientBuilder;
import com.amazonaws.services.dynamodbv2.datamodeling.DynamoDBMapper;
import com.amazonaws.services.dynamodbv2.datamodeling.DynamoDBMapperConfig;

@Configuration
@EnableDynamoDBRepositories(basePackages = "de.dynamodb")
public class DynamoDBConfig {

    @Value("${EKS_NAMESPACE}")
    String eksNamespace;

    @Bean
    public AmazonDynamoDB amazonDynamoDB() {
        return AmazonDynamoDBClientBuilder.standard()
            .withEndpointConfiguration(new AwsClientBuilder.EndpointConfiguration(
                    "dynamodb.eu-central-1.amazonaws.com", "eu-central-1"))
            .withCredentials(awsCredentials())
            .build();
    }

    @Bean
    public AWSCredentialsProvider awsCredentials() {
        return WebIdentityTokenCredentialsProvider.builder().build();
    }

    // Table Name override:

    @Bean
    public DynamoDBMapperConfig.TableNameOverride tableNameOverride() {
        return DynamoDBMapperConfig.TableNameOverride.withTableNamePrefix("myApp-" + eksNamespace + "-");
    }

    @Bean
    public DynamoDBMapperConfig dynamoDBMapperConfig() {
        return DynamoDBMapperConfig.builder().withTableNameOverride(tableNameOverride()).build();
    }

    @Bean
    // Marked as primary bean to override default bean.
    @Primary
    public DynamoDBMapper dynamoDBMapper() {
        return new DynamoDBMapper(amazonDynamoDB(), dynamoDBMapperConfig());
    }
}

With a table like this:

@Data
@DynamoDBTable(tableName = "UserTable")
public class User {

        @DynamoDBHashKey
        private String userId;

        @DynamoDBAttribute
        private String foo;

        @DynamoDBAttribute
        private String bar;
}