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README.md

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hey there ...

Micronaut is a JVM-based full-stack framework used to build modular microservices making

  • Use of Java Reflections as the last meachanism to build the dependency tree
  • Compile-time dependency injection for inline bytecode generation
  • Less CPU & memory resource utilizations

The codebase is built on Micronaut to collate interested stock RSS feeds and render a webpage view from server side, itself. The RSS feeds Google alert urls are in the .env file delimited by '|'. The file has been omitted in the repository, though.

Features implemented

  • Operating-system specific configuration files to adhere to 12-factor app principles
  • RSS feeds Google alerts in .env file under boot >> src >> main >> resources
  • Thread executor pattern & CountDownLatch to synchronize among parallel threads
  • Ensure unique row in H2 database in MySQL mode
  • Named Query in repository layer
  • Server-side web page rendering Micronaut Thymeleaf
  • Run in Raspberry Pi B plus on 1 CPU core | 512 Mb RAM

Commands

  • Run unit tests & build project : mvn clean package -T 8
  • Start H2 Database (Windows) : java -Xms16m -Xmx16m -Xss512k -XX:+UseG1GC -cp h2-2.1.214.jar org.h2.tools.Server
  • Start H2 Database (Linux) : nohup java -Xms16m -Xmx16m -Xss512k -XX:+UseG1GC -cp h2-2.1.214.jar org.h2.tools.Server
  • Run stock feed executable jar ( Windows) : nohup java -Xms64m -Xmx64m -Xss512k -Dmicronaut.environments=windows -XX:+UseConcMarkSweepGC -jar stock-feeds.jar
  • Run stock feed executable jar ( Linux) : nohup java -Xms64m -Xmx64m -Xss512k -Dmicronaut.environments=linux -XX:+UseConcMarkSweepGC -jar stock-feeds.jar
  • Shell script (Linux) : nohup ./stock-feed-start-up.sh
  • Raspberry Pi startup script :
    • Edit crontab : crontab -e
    • Add line : @reboot /home/pi/stock-feeds/stock-feed-start-up.sh >/dev/null 2>&1
    • Reboot : sudo reboot

Cheers ...

stock-feeds