AWS, Dynamodb, Database, Distributed Systems, NoSQL.
attribute_not_exists(sortKey)") .build()) .item(new IdempotencyTable(partitionKeyKeyValue, sortKeyValue, "IN_PROGRESS")) .returnValuesOnConditionCheckFailure("ALL_OLD") .build()); If no element with the same partitionKey and sortKey exists, it will create it and proceed to execute Lambda function.