How to set limit of matching items returned by DynamoDB using Java?

Question

In my Android app, I want to query data from DynamoDB. There will be a thousand matching items, but I just want to get only the first 10 of them. I don\'t know how to set th

Answer 1

This is how you can limit a query result using aws-java-sdk ver 1.10.61

import com.amazonaws.AmazonClientException;
import com.amazonaws.auth.AWSCredentialsProvider;
import com.amazonaws.auth.DefaultAWSCredentialsProviderChain;
import com.amazonaws.regions.Region;
import com.amazonaws.regions.Regions;
import com.amazonaws.services.dynamodbv2.AmazonDynamoDBAsyncClient;
import com.amazonaws.services.dynamodbv2.document.DynamoDB;
import com.amazonaws.services.dynamodbv2.document.Item;
import com.amazonaws.services.dynamodbv2.document.ItemCollection;
import com.amazonaws.services.dynamodbv2.document.QueryOutcome;
import com.amazonaws.services.dynamodbv2.document.spec.QuerySpec; 



AWSCredentialsProvider provider = new DefaultAWSCredentialsProviderChain();
AmazonDynamoDBAsyncClient client = new AmazonDynamoDBAsyncClient(provider);
Region region = Region.getRegion(Regions.fromName(DYNAMODB_REGION));
client.setRegion(region);
dynamoDB = new DynamoDB(client);

QuerySpec querySpec = new QuerySpec();

/* MAX 1 item */
querySpec.setMaxResultSize(1);

querySpec.withHashKey("myPartitionKeyName", partitionKeyValue);

ItemCollection query = dynamoDB.getTable(DYNAMODB_TABLE).query(querySpec);