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F grpc f mixed write transactions

Timm Fitschen requested to merge f-grpc-f-mixed-write-transactions into f-grpc-dev

Summary

Mixed-write transactions: caosdb/customers/lfpb/management#425

Focus

  • Most changes are in src/main/java/org/caosdb/server/grpc/EntityTransactionServiceImpl.java and generalize the old behavior (single write transactions to multiple and mixed transactions). It was a goal to preserve the order of the entities in the request and response which is a little annoying when string id's are involved which cannot be parsed to integer. This case is handled separately in failedWriteDueToStringId.
  • It was necessary to refactor WriteTransaction.deriveUpdate for update transactions where entities are being used which are inserted in the same transaction. See my comment there: !35 (comment 24884)

Test Environment

caosdb-cppinttest!17 (merged)

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  • All automated tests pass
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  • I understand the intent of this MR
  • All automated tests pass
  • Up-to-date CHANGELOG.md
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Edited by Daniel Hornung

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