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Batch Playground

This repository is used as a playground to experiment building and testing Spring Batch and Spring Cloud Task applications.

Tests

Most of the tests in app are end-to-end (journey tests) and require the external-system to be up and running.

Note: the external-system application will run with chaos-monkey enabled by default to simulate transient failures at runtime. This is done in order to harness the robustness of the batch application.

Other tests in the application will also require additional processes for the database, queue and workers.

In order to run all the necessary components we can leverage the docker-compose.yaml file and run this command in the root of the project:

docker compose up

And then in another terminal:

./mvnw -pl app test -P e2e

Metrics

Metrics are collected by Prometheus every 5s and Grafana has been already configured with some custom dashboards that can be used to monitor the performance of the batch operations:

  • JVM (Micrometer)1: used to display general and common metrics for JVMs
  • Spring Batch Prometheus2: used to display throughput and some common metrics for batch processing

Spring Batch Metrics

Footnotes

  1. This is a modified dashboard, the original one comes from the open source Dashboard in the Grafana website and can be found here ↩

  2. This is a modified dashboard, the original one comes from the open source GitHub repository of Spring Batch and can be found here ↩