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Add hibernate-demo: get() vs load(), merge() vs refresh(), inserting objects (Hibernate 7.4.1.Final + Spring Boot 4.1.0)

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Adds a JUnit test suite (GetVsGetReferenceTest, MergeRefreshTest, OptimisticLockTest,
IdentityBatchTest, SequenceBatchTest, AllocationSizeSweepTest, BatchSizeSweepTest) so every
surprising behavior described in the three companion posts has a reproducible test, alongside
the original CommandLineRunner scenarios. Rewrites all three doc chapters and the README around
the new experiments: the get()/getReference() same-session matrix, the merge()/refresh()
experiments (including exactly when OptimisticLockException surfaces and a corrected LAZY-plus-
cascade merge() result), and two new sweeps (allocationSize, batch_size) for batch inserts.
This commit is contained in:
Ankur Mhatre
2026-08-26 17:26:04 +00:00
commit 7b06d653e4
43 changed files with 3053 additions and 0 deletions
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docs/output/allocation-and-batch-size-sweeps.txt Normal file
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allocationSize=50, batch_size=1, 30 rows -> prepareStatementCount=32
allocationSize=50, batch_size=10, 30 rows -> prepareStatementCount=2
allocationSize=50, batch_size=25, 30 rows -> prepareStatementCount=2
allocationSize=50, batch_size=50, 30 rows -> prepareStatementCount=2
allocationSize=50, batch_size=25, 30 rows -> prepareStatementCount=3
allocationSize=25, batch_size=25, 30 rows -> prepareStatementCount=4
allocationSize=10, batch_size=25, 30 rows -> prepareStatementCount=5
allocationSize=1, batch_size=25, 30 rows -> prepareStatementCount=31