AWS DynamoDB - dynamic table prefix using DynamoDBMapper

We can use DynamoDBMapperConfig.TableNameOverride to configure the DynamoDBMapper and provide a custom/dynamic table name prefix using TableNameOverride.withTableNamePrefix(String).

Plain Java Example:

import com.amazonaws.services.dynamodbv2.*;
import com.amazonaws.services.dynamodbv2.datamodeling.*;

import java.util.UUID;

//code:

String prefix = "SOME_DYNAMIC_PREFIX"; //can be pulled from a dynamic logic eg: profile, env variable etc
var mapperConfig = new DynamoDBMapperConfig.Builder()
        .withTableNameOverride(DynamoDBMapperConfig.TableNameOverride.withTableNamePrefix(prefix + "-"))
        .build();

var dynamoDB = AmazonDynamoDBClientBuilder.standard().build();
var dbMapper = new DynamoDBMapper(dynamoDB, mapperConfig);


// use it
dbMapper.load(MyTable.class, UUID.randomUUID());

Spring DynamoDB dynamic table prefix example

import com.amazonaws.services.dynamodbv2.*;
import com.amazonaws.services.dynamodbv2.datamodeling.*;
import org.springframework.context.annotation.*;
import java.util.UUID;

@Configuration
class AwsConfig {
    @Bean
    AmazonDynamoDB dynamoDB() {
        return AmazonDynamoDBClientBuilder.standard().build();
    }

    @Bean
    DynamoDBMapperConfig dynamoDBMapperConfig() {
        String prefix = "SOME_DYNAMIC_PREFIX"; //can be pulled from a dynamic logic eg: profile, env variable etc
        return new DynamoDBMapperConfig.Builder()
                .withTableNameOverride(DynamoDBMapperConfig.TableNameOverride.withTableNamePrefix(prefix + "-"))
                .build();
    }

    @Bean
    DynamoDBMapper dynamoDBMapper(AmazonDynamoDB dynamoDB, DynamoDBMapperConfig dynamoDBMapperConfig)
    {
        return new DynamoDBMapper(dynamoDB, dynamoDBMapperConfig);
    }
}


import com.amazonaws.services.dynamodbv2.datamodeling.*;
import java.util.UUID;
@DynamoDBTable(tableName = "person")
public class MyTable {
    @DynamoDBHashKey
    @DynamoDBAutoGeneratedKey
    UUID id;

    String name;
    //getter setter/other fields