Batch Delete Using DynamoDB Mapper (Guide w/ Code Examples)

The DynamoDBMapper class, provided by the AWS SDK for Java, provides a convenient way to map your domain classes to the items in a DynamoDB table. One of the features of the DynamoDBMapper class is the ability to perform batch delete operations. You can use the DynamoDBMapper's batchDelete method to delete multiple items in a single request in Java.

import com.amazonaws.services.dynamodbv2.datamodeling.DynamoDBMapper;
import com.amazonaws.services.dynamodbv2.datamodeling.DynamoDBMapperConfig;
import com.amazonaws.services.dynamodbv2.datamodeling.DynamoDBScanExpression;

public class BatchDeleteExample {

    public static void main(String[] args) {

        // Create a new DynamoDBMapper
        AmazonDynamoDB client = AmazonDynamoDBClientBuilder.standard().build();
        DynamoDBMapper mapper = new DynamoDBMapper(client);

        // Define a scan expression to retrieve all items in the table
        DynamoDBScanExpression scanExpression = new DynamoDBScanExpression();

        // Retrieve the items to delete
        List<Product> items = mapper.scan(Product.class, scanExpression);

        // Delete the items
        mapper.batchDelete(items, DynamoDBMapperConfig.DEFAULT);
    }
}