AnthonyHonstain/kotlin-dropwizard-product-service

Experimental Dropwizard service in Kotlin for modeling products (SKU) and other metadata in a microservice.

KotlinProductService

This was an experimental project for me to play with Dropwizard and Kotlin.

Toy microservice that models product information in a supply chain context.

I abandoned my work with Javalin and switched to Dropwizard https://bitbucket.org/honstain/javalin-inventory-service-v2/src/master/

Dependencies

Dropwizard

Version 2.0.23 Java framework for high-performance RESTful web services.

• https://www.dropwizard.io/en/latest/
• https://github.com/dropwizard/dropwizard

Dropwizard Metrics

I use the Dropwizard Metrics library to report to Graphite

• https://www.dropwizard.io/projects/metrics/en/latest/manual/core.html
• https://www.dropwizard.io/projects/metrics/en/latest/manual/jersey.html
• https://metrics.dropwizard.io/4.2.0/manual/graphite.html#manual-graphite

There is a grafana dashboard record in grafanaDashboard.json that you can use to recreate the dashboard. This was the guide I used to run Grafana locally (Grafana and Graphite via docker-compose) https://www.linode.com/docs/guides/install-graphite-and-grafana/

Kafka

This uses the Dropwizard version of the Kafka client that utilizes the Apache Kafka client.

• https://github.com/dropwizard/dropwizard-kafka

WARNING The integration test assumes there is a Kafka cluster to interact with, if you want to change that you can modify product-service-test-config.yml

Docker Compose

I have included in the folder docker-compose_stuff the configuration for the Grafan+Graphite stack and the Kafka+Kowl stack.

How to start the KotlinProductService application

1. Run mvn clean install to build your application
2. Start application with java -jar target/kotlin-product-service-1.0-SNAPSHOT.jar server config.yml
3. To check that your application is running enter url http://localhost:7070

Health Check

To see your applications health enter url http://localhost:7071/healthcheck