This project shows how to implement tracing in a network of Spring Boot applications.

This application is a service facing the user (a "downstream" service), meaning that it accesses other upstream services to provide its functionality.

1. Start the upstream service with ./gradlew bootrun
2. Start this service with ./gradlew bootrun
3. Open http://localhost:8080/customers-with-address/{id} where IDs from 1-50 are will return a valid HTTP 200 response and other IDs will return an error response.
4. Look into the log files of both services and verify that both contain the same trace id.