Planned lessonJNR-031-L08

Demo: finding the self-invocation bug

On This Lesson 3 topics

This lesson is planned. The outline below lists the topics it will cover. The full lesson has not been published yet.

In this lesson

diagnose a transaction that never starts; prepares JNR-031-LAB1.

Draft outline details

Run the money-transfer exercise: a failure after debit leaves money missing.
Check the code: transfer() calls this.debitAndCredit(), which has the annotation.
Prove it with the transaction log (logging.level.org.springframework.transaction=TRACE): no transaction begins.
Planned mistake: mark the private method @Transactional and show it still does nothing.
Fix it by moving the method to another bean (or annotating the public entry point); re-run the failure test.

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