Microservice: consumer-producer-service

This is a demo microservice for the consumers-producers currently accessing atomic counter.

Tech stack used:

1. Java 8
2. Spring Boot 2.4.2
3. Spring REST API (Spring Web)
4. Lombok 1.18.16
5. Spring Data JPA & MySQL-8
6. Dockerized (docker-compose.yml and Dockerfile is included)
7. TDD approach using JUnit 5, Mockito, and Spring Boot Test
8. Spring boot starter validation for request validation

Steps to run micro-service along with MySQL as containers in docker using docker compose:

Step 1: Open the terminal (or) Command Prompt

Step 2: Enter the project directory,

cd <project_directory>

Step 3: To clean and package the micro-service locally

mvnw clean package

Step 4: Use docker compose to build and run both MySQL & micro-service as a docker containers:

docker-compose up --build

Note: Above docker compose command will run the containers namely,

1. ekar-mysql container for mysql and its port is 3306
2. ekar-producer-consumer-service container for microservice and its port is 8080

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OpenAPI 3.0 Documentation URL:

http://localhost:8080/swagger-ui/index.html?configUrl=/v3/api-docs/swagger-config
Note: Also Postman Collection has been pushed into the repository for your reference.

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MySQL Database CLI to verify the transaction information:

Prerequisite:

Docker has to be there on the host machine

Step 1: Open a new terminal (or) new Command Prompt (without disturbing the earlier one)

Step 2: Connect to ekar-mysql container using docker cli command,

docker exec -it ekar-mysql /bin/bash

Step 3: Connect to mysql server

mysql -usa -ppassword -h localhost -P3306

Step 4: Display all the available databases,

show databases;

Step 5: Switch to ekardb

use ekardb;

Step 6: List all the available tables

show tables;

Step 7: Run the select queries to verify the data

select * from request_log; select * from counter_log;

Note: Preserve this state until you complete your testing.

Step 8: Exit from the mysql cli

exit

Step 9: Exit from the mysql container

exit

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Program outputs

Less consumers and more producers

More consumers and less producers

Equal consumers and producers

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