Planned lessonJNR-031-L07

Demo: making checkout atomic

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

make "place order" all-or-nothing; prepares JNR-031-LAB1.

Draft outline details

Show placeOrder without @Transactional: stock is reserved, then the order save fails; stock is wrong.
Add @Transactional to the service method.
Re-run the failing test: stock is unchanged.
Planned mistake: throw a checked exception and show the stock change committed; fix with rollbackFor.
Add @Transactional(readOnly = true) to the order query method.

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