Clocker

Sequence diagram

@startuml
participant FE as "Frontend" << React >>
participant Funnel as "Funnel" << Python >>
participant Hours as "ServeHours" << Go >>
participant Minutes as "ServeMinutes" << Go >>
participant Seconds as "ServeSeconds" << Go >>
participant Milliseconds as "ServeMilliseconds" << Go >>
participant CurrentTime as "ServeCurrentTime" << Rust >>

activate FE #hotpink
    FE -> FE: Load page
    FE -> Funnel: WS Connect

    loop #ivory
        activate Funnel #gold
            Funnel -> Hours: GetHours()
            activate Hours #skyblue
            Hours -> CurrentTime: GetCurrentTime()
            activate CurrentTime #sandybrown
            return HH:MM:SS.ms
            return HH

            Funnel -> Minutes: GetMinutes()
            activate Minutes #skyblue
            Minutes -> CurrentTime: GetCurrentTime()
            activate CurrentTime #sandybrown
            return HH:MM:SS.ms
            return MM

            Funnel -> Seconds: GetSeconds()
            activate Seconds #skyblue
            Seconds -> CurrentTime: GetCurrentTime()
            activate CurrentTime #sandybrown
            return HH:MM:SS.ms
            return SS

            Funnel -> Milliseconds: GetMilliseconds()
            activate Milliseconds #skyblue
            Milliseconds -> CurrentTime: GetCurrentTime()
            activate CurrentTime #sandybrown
            return HH:MM:SS.ms
            return ms

            Funnel -> FE: WS: Send formatted time
        deactivate Funnel
    end
deactivate FE

@enduml

Services

Service	Language	Port
Funnel	Python	-
ServeCurrentTime	Rust	50000
ServeHours	Go	50001
ServeMinutes	Go	50002
ServeSeconds	Go	50003
ServeMilliseconds	Go	50004

Funnel

Requirements:

• python 3.8+
• grpcio
• grpcio-tools

Install virtualenv and libs

cd src/funnel
virtualenv env
source env/bin/activate
pip install -r requirements.txt

Compile proto stubs:

cd src/funnel
make proto

Run service:

cd src/funnel
make run