Examples with QueryResultPage com.amazonaws.services.dynamodbv2.datamodeling.QueryResultPage used on opensource projects

Example 16 with QueryResultPage

use of com.amazonaws.services.dynamodbv2.datamodeling.QueryResultPage in project BridgeServer2 by Sage-Bionetworks.

the class DynamoSurveyDao method getSurveyGuidForIdentifier.

/**
 * {@inheritDoc}
 */
@Override
public String getSurveyGuidForIdentifier(String appId, String surveyId) {
    // Hash key.
    DynamoSurvey hashKey = new DynamoSurvey();
    hashKey.setAppId(appId);
    // Range key.
    Condition rangeKeyCondition = new Condition().withComparisonOperator(ComparisonOperator.EQ).withAttributeValueList(new AttributeValue().withS(surveyId));
    // Construct query.
    DynamoDBQueryExpression<DynamoSurvey> expression = new DynamoDBQueryExpression<DynamoSurvey>().withConsistentRead(false).withHashKeyValues(hashKey).withRangeKeyCondition("identifier", rangeKeyCondition).withLimit(1);
    // Execute query.
    QueryResultPage<DynamoSurvey> resultPage = surveyMapper.queryPage(DynamoSurvey.class, expression);
    List<DynamoSurvey> surveyList = resultPage.getResults();
    if (surveyList.isEmpty()) {
        return null;
    }
    return surveyList.get(0).getGuid();
}