Add multi-datasource module: two databases with per-database DataSource, Flyway, EntityManagerFactory and transaction manager on Boot 4.1

Working setup plus one small application per way of getting it wrong (no @Primary, @Primary only, url vs jdbc-url, wrong repository package, Flyway auto-configuration), plain vs named @Transactional, and ChainedTransactionManager with a failing commit. Transcripts are written by the tests.

Co-Authored-By: Claude Sonnet 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01Uu7q8vPeREyT4218EJPzz1
This commit is contained in:
Claude
2026-09-24 09:38:27 +00:00
parent d6b76c57db
commit e59ff029a1
44 changed files with 1465 additions and 0 deletions
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# Is org.springframework.data.transaction.ChainedTransactionManager still shipped, and is it deprecated?
jar: spring-data-commons-4.1.1.jar
class: org/springframework/data/transaction/ChainedTransactionManager.class
--- javap -v: class-level annotations ---
RuntimeVisibleAnnotations:
0: #245()
java.lang.Deprecated
--- javap -v: Deprecated attribute ---
Deprecated: true