Spring Boot Demo Project

This is a demo project which shows how to build a Java service using Spring Boot to provide RESTful APIs. It uses below open source tech stacks:

Database: MySQL

• Community Server: https://dev.mysql.com/downloads/mysql/
• Workbench: https://dev.mysql.com/downloads/workbench/

Cache: Redis

• Installation: https://redis.io/download
• Command reference: https://redis.io/commands

Message Queue

Use Rabbit MQ to handle high concurrent requests (2000 QPS).

• Install RabbitMQ on Mac

brew install rabbitmq

• Enable RabbitMQ management plugin

cd /usr/local/Cellar/rabbitmq/3.8.9_1/
sudo sbin/rabbitmq-plugins enable rabbitmq_management

• Add environment variable to ~/.bash_profile

export RABBIT_HOME="/usr/local/Cellar/rabbitmq/3.8.9_1/"
export PATH=$PATH:$RABBIT_HOME/sbin

source ~/.bash_profile to make the environment variable take effect immediately.

• Start RabbitMQ

sudo rabbitmq-server -detached

Note without sudo you will get the error [error] Error when reading /Users/{username}/.erlang.cookie: eacces

• Access RabbitMQ management portal: http://localhost:15672/
• Stop RabbitMQ

sudo rabbitmqctl stop

Unit Testing

• JUnit 5
• Mockito

Scheduled Task

• Print the current time every 1 minute

Aspect-Orient Programming

• Permission check to API

Design Pattern

• Watcher pattern: if a user is created, listeners will take actions accordingly , e.g. send text message, email, etc.

API Document: Swagger

• http://localhost:8080/swagger-ui/index.html?configUrl=/v3/api-docs/swagger-config#