Kotlin

Testing OpenTelemetry JVM instrumentation with Kotlin

Jun 29, 2021 OpenTelemetry observability Kotlin testing

The OpenTelemetry Java instrumentation agent automatically instruments many common frameworks but there are times you may want to customize your application's telemetry by adding your own custom spans, adding attributes to existing spans, etc. In that case, it can be helpful to verify the custom instrumentation through …

First steps into observability with OpenTelemetry, Honeycomb, and Kotlin

Jun 6, 2021 OpenTelemetry Honeycomb observability Kotlin

In this post we'll go through my initial journey to add observability to the Projektor test reporting app using OpenTelemetry and Honeycomb. Projektor already has traditional monitoring with metrics around p95 response times for each REST endpoint, counters for successful and failed operations, etc. But I was intrigued …

Using the GitHub API with Kotlin

Mar 10, 2021 github Kotlin

Recently as part of Projektor test report project, I wanted to add the capability to comment directly on pull requests with links to the test report, code coverage stats, etc. That way users could get easier and faster access to the information than searching through the CI output to find the link to the Projektor test …

Integrating database access and management with Flyway and jOOQ into a Kotlin Ktor app

Feb 28, 2021 Kotlin Ktor jOOQ database Gradle Docker Postgres

One of my goals when I started a learning project a couple of years ago was to get more hands-on experience with Kotlin co-routines, so I explored app frameworks that natively supported co-routines. I landed on Ktor, an open-source framework from JetBrains (creators of Kotlin) that supports co-routines throughout the …

Kotlin test assertions with informative failure messages using Strikt

Feb 21, 2021 kotlin testing

When I started writing Kotlin code a couple of years ago, one of the main things I missed after previously writing tests with Groovy/Spock were the easy yet powerful assertions with Groovy's power assert - not to mention the expressive failure messages when a test failed. Groovy's power assert prints out the …