Object persistence interface

Some AWS SDKs provide an object persistence interface where you do not directly perform data plane operations. Instead, you create objects that represent items in Amazon DynamoDB tables and indexes, and interact only with those objects. This allows you to write object-centric code, rather than database-centric code.

Note

Object persistence interfaces are available in the AWS SDKs for Java and .NET. For more information, see for DynamoDB.

import com.example.dynamodb.Customer;
import software.amazon.awssdk.auth.credentials.ProfileCredentialsProvider;
import software.amazon.awssdk.enhanced.dynamodb.DynamoDbEnhancedClient;
import software.amazon.awssdk.enhanced.dynamodb.DynamoDbTable;
import software.amazon.awssdk.enhanced.dynamodb.Key;
import software.amazon.awssdk.enhanced.dynamodb.TableSchema;
import software.amazon.awssdk.enhanced.dynamodb.model.GetItemEnhancedRequest;
import software.amazon.awssdk.regions.Region;
import software.amazon.awssdk.services.dynamodb.DynamoDbClient;
import software.amazon.awssdk.services.dynamodb.model.DynamoDbException;

    public static String getItem(DynamoDbEnhancedClient enhancedClient) {

        Customer result = null;

        try {
            DynamoDbTable<Customer> table = enhancedClient.table("Customer", TableSchema.fromBean(Customer.class));
            Key key = Key.builder()
                .partitionValue("id101").sortValue("[e-mail]")
                .build();

            // Get the item by using the key.
            result = table.getItem(
                    (GetItemEnhancedRequest.Builder requestBuilder) -> requestBuilder.key(key));
            System.out.println("******* The description value is " + result.getCustName());

        } catch (DynamoDbException e) {
            System.err.println(e.getMessage());
            System.exit(1);
        }
        return result.getCustName();
    }