DynamoDB Enhanced Client: batch writes

Describe the feature

Requested feature: batchPutItem(Collection<T>) and batchUpdateItem(Collection<T>) methods on DynamoDbTable.

Use Case

The low-level client supports batch transactional writes, and the Enhanced client works by mapping POJOs onto low-level operations. I would like to write a series of records transactionally from POJOs, but the Enhanced client only supports single-record operations. Instead, I want to prepare the records to be saved and save them as a batch.

Proposed Solution

PutItemOperation (with the other TableOperations) generates a PutItemRequest, and the low-level client already supports the batchWriteItem operation that takes multiple PutItemRequests and batches them. All of the existing logic for the Enhanced client could remain in place with a scatter-gather implementation that collects the generated requests and executes them via batchWriteItem.

Other Information

No response

Acknowledgements

• I may be able to implement this feature request
• This feature might incur a breaking change

AWS Java SDK version used

2.17.260

JDK version used

OpenJDK 64-Bit Server VM AdoptOpenJDK-11.0.11+9 (build 11.0.11+9, mixed mode)

Operating System and version

Gentoo Linux

[debora-ito]

Quick update: this was added to the backlog.

Anyone who’d like to see this supported in the Java SDK make sure to add a 👍 to the original description to help us with prioritization.

[nickcaballero]

Regarding the batchPut, it can be written as a TableOperation that takes a BatchWriteItemEnhancedRequest<T> and returns a BatchWriteResult<T>, where the request/result are more strictly typed versions of the already available types. That would also pave the road for supporting a batchDelete.