Prepare Environment

In order to work with light-tram-4j, we need to start the infrastructure services and the easier way is to use docker-compose. Here is a list of services that need to be started before we start integration testing.

• Kafka
• Zookeeper
• Mysql
• CDC service for light-tram-4j

To start Kafka, Zookeeper and Mysql, you can use the docker-compose-eventuate.yml in light-docker repository. And CDC server for light-tram-4j can be found at docker-compose-cdcserver-for-tram.yml

The detail steps are documented in the getting started in light-tram-4j

To review the source code, it would be better to checkout the repository from github and review the code in an IDE like IntelliJ Idea.

cd ~/networknt
git clone https://github.com/networknt/light-example-4j.git

The source code can be found at light-example-4j/tram/light-tram-todolist folder.

There are two different implementations:

A monolithic single module implementation can be found in single-module folder

A microservices multiple module implementation can be found in multi-module folder.

In the next step, let’s walk through the common module which contains domain event definitions.