Add flow for crud transactions #245
Merged
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Sometimes, users want a batch of data to upload while also ensuring that that batch respects transaction boundaries. At the moment, we don't really have APIs for that, because:
getCrudBatch()returns a batch of items with a flexible size limit, but doesn't respect transaction boundaries (so it's possible to accidentally upload half of a transaction).getNextCrudTransaction()returns a complete transaction, but nothing more. It will also always return the oldest transaction, so you can't callgetNextCrudTransaction()multiple times to get more than one.This adds
getCrudTransactions(), aFlowthat starts with the oldest transaction and then keeps on returning more transactions until the collector aborts. This gives users a tool to compose batches with flexible sizes while still ensuring everything is grouped by transactions.