Car and Person demo

Two Open Liberty services running MicroProfile Telemetry 2.0 to demonstrate metrics, logs and traces

Before running this demo, it is recommended to set up a a backend system to collect the telemetry data from the application.

Running the backend exporters

See the docker-otel-lgtm repository and clone the repo:

git clone https://github.com/grafana/docker-otel-lgtm.git 
cd docker-otel-lgtm/docker

Build and run the image containing all services required for gathering traces, metrics and logs:

podman build . -t grafana/otel-lgtm 
podman run -p 3000:3000 -p 4317:4317 -p 4318:4318 --rm -ti localhost/grafana/otel-lgtm

Person Service:

This service allows users to create records of people, given their name and age.

Start the Person service:

cd person 
mvn liberty:run

To create a new person with the name Bob and age 21, navigate to:

http://localhost:9080/people/createPerson?name=bob&age=21

You will see confirmation that a person has been created with a unique id:

Person created with id 5859008369859564999

To view all of the people that you have created, navigate to:

http://localhost:9080/people

You should see a result like the following, with the unique id shown previously:

[{"age":21,"id":5859008369859564999,"name":"bob"}]

Car Service:

This service allows users to create records of cars, given the make of the car and the id of the person who owns the car.

Start the Car service:

cd car 
mvn liberty:run

Create a car associated with the person that you just created using the Person service. To do this, navgiate to the following endpoint replacing the personId with the id shown in your pevious result:

http://localhost:9081/cars/createCar?make=skoda&personId=5859008369859564999

When the car has been created, a HTTP request is sent to the Person service to return the details of the person with the given id. Consequently, You should see a result like the following

Car created with id 3644955172396212837 owned by {"age":21,"id":5859008369859564999,"name":"bob"}

To view all of the cars you have created, navigate to:

http://localhost:9081/cars/

When you are done checking out the services, stop the Liberty instances by pressing CTRL+C in the command-line sessions where you ran Liberty.