Get All Items from DynamoDB Using Java (Guide w/ Code Examples)

Provided by Rafal Wilinski
In this example, a ScanRequest
is created and set to retrieve data from the "MyTable" table. The ScanResult
is retrieved and stored in a variable called result
. The Scan
operation is called in a do-while loop. The loop continues as long as the LastEvaluatedKey
attribute of the ScanResult
object is not null. This attribute is present when the Scan
operation has been paginated and contains the primary key of the last item on the current page of results. The setExclusiveStartKey
method is used to set the primary key to start the next scan operation so that the next page of results will be retrieved.
import com.amazonaws.services.dynamodbv2.AmazonDynamoDB; import com.amazonaws.services.dynamodbv2.AmazonDynamoDBClientBuilder; import com.amazonaws.services.dynamodbv2.model.ScanRequest; import com.amazonaws.services.dynamodbv2.model.ScanResult; public class GetAllItemsExample { public static void main(String[] args) { AmazonDynamoDB client = AmazonDynamoDBClientBuilder.defaultClient(); ScanRequest scanRequest = new ScanRequest().withTableName("MyTable"); ScanResult result; do { result = client.scan(scanRequest); result.getItems().forEach(item -> System.out.println(item)); scanRequest.setExclusiveStartKey(result.getLastEvaluatedKey()); } while (result.getLastEvaluatedKey() != null); } }
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