UUIDs for DynamoDB?

Question

Is it possible to get DynamoDB to automatically generate unique IDs when adding new items to a table?

I noticed the Java API mentions @DynamoDBAutoGeneratedKey so I\

Answer 1

The client can create a (for all intents and purposes) unique ID either by picking a long random id (DynamoDB supports 128-bit integers, for example), or by picking an ID which contains the client's IP address, CPU number, and current time - or something along these lines. The UUID standard even includes a standard way to do this (and you have libraries in various languages to create such UUIDs on the client side), but you don't really need to use a standard. And interesting question is how do you plan to find these items if they have random keys. Or are you planning to use a secondary index?