Create Dynamo DB table when they don't exist

DynamoDbHelper.java

import com.amazonaws.regions.RegionUtils;
import com.amazonaws.services.dynamodbv2.AmazonDynamoDBClient;
import com.amazonaws.services.dynamodbv2.datamodeling.DynamoDBMapper;
import com.amazonaws.services.dynamodbv2.model.GlobalSecondaryIndex;
import com.amazonaws.services.dynamodbv2.model.Projection;
import com.amazonaws.services.dynamodbv2.model.ProjectionType;
import com.amazonaws.services.dynamodbv2.model.ProvisionedThroughput;
import com.amazonaws.services.dynamodbv2.model.ResourceNotFoundException;
import com.amazonaws.auth.AWSCredentials;

public class DynamoDbHelper {

	private static DynamoDBMapper getDynamoDBMapper(final Configuration configuration, final Class<?> klass) {
			val client = new AmazonDynamoDBClient();
			client.setRegion(RegionUtils.getRegion(configuration.region));
			val mapper = new DynamoDBMapper(client);
			val request = mapper.generateCreateTableRequest(klass);
			request.setProvisionedThroughput(
				new ProvisionedThroughput(
					configuration.read,
					configuration.write
				)
			);
			if (request.getGlobalSecondaryIndexes() != null) {
				for (final GlobalSecondaryIndex index : request.getGlobalSecondaryIndexes()) {
					index.setProvisionedThroughput(new ProvisionedThroughput(
						configuration.read,
						configuration.write
					));
					index.setProjection(new Projection().withProjectionType(ProjectionType.ALL));
				}
			}
			final String tableName = request.getTableName();
			try {
				client.describeTable(tableName);
			} catch (final ResourceNotFoundException e) {
				log.info("Dynamo db table {} doesn't exist, attempting to create....", tableName);
				client.createTable(request);
			}
			return mapper;
		}

	public static class Configuration implements AWSCredentials {

		public String key;

		public String secret;
		
		public String region = "us-east-1";

		public long read = 5L;

		public long write = 5L;

		@Override
		public String getAWSAccessKeyId() {
			return key;
		}

		@Override
		public String getAWSSecretKey() {
			return secret;
		}
	}
}