@startuml

participant gerrit as "Gerrit\n(git server)"
participant controller as "Controller"
participant vcsworker as "VCS\nworker"
participant gitlab as "GitLab"
participant runner as "Gitlab\nRunner"
participant artifacts as "Artifact\nstore"
participant deployer as "Deployment\nworker"
participant env as "Test\nenvironment"

gerrit -> controller : notify of change
activate controller

controller -> vcsworker : copy repo to gitlab
activate vcsworker
vcsworker -> gerrit : git clone
gerrit -> vcsworker
vcsworker -> gitlab : git push
activate gitlab
vcsworker -> controller
deactivate vcsworker

gitlab -> runner : build .gitlab-ci.yml
activate runner
runner -> artifacts : upload artifacts
runner -> gitlab : build finished
deactivate runner
gitlab -> controller : webhook: build finished
deactivate gitlab

controller -> deployer : deploy artifacts
activate deployer
deployer -> artifacts : request artifacts
artifacts -> deployer
deployer -> env : copy artifacts to test env
deployer -> controller : deployment done
deactivate deployer

controller -> gerrit : notify build result
deactivate controller
@enduml