How is handle 'Optimistic Locking' in API Gateway + DynamoDB combo

Question

I recently started working on API Gateway with DynamoDB. Its going really cool, as it is that easy to expose a database operation as a service using API Gateway.

I am currently looking at Data integrity side of things, as we are going to use this combo for a sensitive use case. How can I improve data integrity when I use API Gateway + DynamoDB.

This documentation from AWS explains 'Optimistic locking' from JAVA & .Net SDK perspective - http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/DynamoDBMapper.OptimisticLocking.html

But when I use dynamodb through API gateway, how can I enable 'Optimistic locking' ? As I won't be using Java / .Net SDKs. I don't see any related documentation.

Or I don't have to worry about Data integrity side of things, if I use API Gateway in front of DynamoDB. Just thinking this way, because even the update / getItem operation doesn't talk about it :)

Any thoughts ?

Cheers

Data integrity will still be a problem you will need to solve. You will have to implement optimistic locking on the client side. — Shibashis
– Shibashis, Commented Jun 5, 2016 at 23:57
@Shibashis Thanks, you mean to say I will have to build a custom optimistic locking mechanism myself ? like introduce a custom field for versions and manually check them in my code ? Because my client is just going to invoke a REST endpoint for read and write. — gnanagurus
– gnanagurus, Commented Jun 6, 2016 at 2:16
yes. You will have use client side logic with conditional writes feature of dynamo — Shibashis
– Shibashis, Commented Jun 6, 2016 at 3:18

Andreas · Accepted Answer · 2016-06-06 10:54:08Z

2

Building optimistic locking is possible with the help of Conditional Writes no matter which language you are using to access DynamoDB.

More information about Conditional Writes: http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Expressions.SpecifyingConditions.html

answered Jun 6, 2016 at 10:54

Andreas

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