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Add core-events module: @EventListener, @TransactionalEventListener phases and async listeners on Boot 4.1

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Thirteen captured transcripts: a listener is a blocking method call, ordering and chaining, SpEL conditions,
generic-event erasure, every transaction phase on commit and rollback, what an AFTER_COMMIT listener can
write, which exceptions reach the publisher, async listeners on platform and virtual threads, and the
annotations behind Spring Modulith's @ApplicationModuleListener.

Co-Authored-By: Claude Sonnet 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01Uu7q8vPeREyT4218EJPzz1
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Claude
2026-09-24 07:08:47 +00:00
parent c418589251
commit d6b76c57db
72 changed files with 1658 additions and 0 deletions
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core-events/output/08-exceptions-and-transactions.txt
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# Which listener's exception reaches the caller, and whether the order row survives
--- plain listener throws ---
caller saw: IllegalStateException: plain listener failed
order row survived: false
--- beforeCommit listener throws ---
caller saw: IllegalStateException: BEFORE_COMMIT listener failed
order row survived: false
--- afterCommit listener throws ---
caller saw: nothing
order row survived: true
logged: TransactionSynchronization.afterCompletion threw exception
logged: java.lang.IllegalStateException: AFTER_COMMIT listener failed