Controlling your race with Micrometer, Spring Boot (2.x) and Cloud Foundry

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Imagine that you’re part of a (car) race team. You’re the one behind the screens to control the race and make some tough decisions (like changing the team's strategy).

But you don’t have the insights (or metrics) about your car, opponents or even the weather. Sounds painful right? But why are we making this mistake when building our software? Why don’t we implement metrics by default?

SLFf4J logging is one side of the story, but we also need to know our application health. That’s where Micrometer comes in! It’s a library which you can use to define your own custom metrics, like:

• timers (to check the performance of your microservices)

• counters (to check how many times a certain event is occurring)

• gauges (to check the current value of a variable)

• and many more

These metrics are exposed by REST endpoints (JSON) together with Spring Boot actuator, which can be saved into a database like Prometheus or Graphite. And to visualize the data you can use a tool like Grafana. Pretty interesting right?

In the demo (live coding!) Ko Turk will show you how to create such applications using Micrometer, Spring Boot and Cloud Foundry as our platform. Ready to win this race with him? Jump in!

About the speaker

Ko Turk is a Senior Java Developer at Blue4IT! He currently works as a Fullstack engineer, creating microservices and building frontend applications. As a speaker he speaks at conferences (like JavaZone, DevNexus, and JFall) about IDEs, Micrometer, and Consumer Driven Contract Testing.

You can find him online at http://ko-turk.nl or on Twitter @KoTurk77.

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