APC Simulator

User Guide

• Environment Settings

  • run npm install in terminal to install all dependent packages
  • run docker-compose up -d in the terminal to start the service of nats-server and mongodb
  • run node src in terminal to start up the whole services
  • run npm test in terminal to start the unit-testing of whole project

• Features

  • measureService
    • it is presented as Pre-Layer Measurement Generator in the architecture, which is the cron job to be triggered regularly for invoking the APC service
  • apcService
    • it is presented as APC service to calculate and return the period and temperature result by the type of stake
  • paramsService
    • it is presented as Control Parameter Generator in the architecture, which is the cron job to be triggered regularly for publishing the thickness factor and moisture factor to the APC service. These two factor will be used as the parameters in specific strategy of APC service

• Config Settings

  • the config file is in the path of ./config/default.js
    • change the value of config.nats.connection when you want to connect to the external nats-server, the default number is the local nats-server of 127.0.0.1:4222
    • measureService is cron job which is triggered once with the period of config.cron.measurePeriod, the default number is 10000ms
    • paramsService is cron job which is triggered once with the period of config.cron.paramsPeriod, the default number is 15000ms

• Bonus

  • the thickness factor and moisture factor are stored in the memory cahce on global.cache of ./src/index.js. Is that possible to leverage MongoDB to store and retrieve this data?
  • there are two strategies (sharonStrategy and defaultStrategy) in ./src/apcService/utilities/strategyUtil.js, can you extent for more strategies to meet the requirement of more possibilities?
  • there are only two stake types (SHARON and RIB_EYE) in ./src/measureService/index.js, can you extend it to support more types of stake for the caculating in APC service?
  • Can you provide the unit test files for all services in this project?

• Reference

  • jest unit test tutorial (https://www.softwaretestinghelp.com/jest-testing-tutorial)