Planned lessonJNR-008-L05

Demo: first Spring Boot app from Initializr to running endpoint

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

go from nothing to a running app answering /actuator/health; prepares JNR-008-LAB1.

Draft outline details

Open Initializr; pick Maven, Java, current Boot; name it shop-api.
Add Spring Web, Validation, Actuator. Download and unzip; open in the IDE.
Planned mistake: add five extra starters "just in case" and watch startup grow and fail on a missing database setting. Fix: remove everything you do not need.
Run ./mvnw spring-boot:run and read the startup log (port, "Started ShopApiApplication").
Open http://localhost:8080/actuator/health and see {"status":"UP"}.
Stop the app with Ctrl+C.

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