This project demonstrates how to integrate Vert.x with etcd for configuration management in a Java application.

Vert.x is a polyglot event-driven application framework that runs on the Java Virtual Machine (JVM). It provides a powerful toolkit for building reactive applications and supports various protocols and integrations.

etcd is a distributed key-value store that is widely used for shared configuration and service discovery in distributed systems. This project showcases how to use etcd for dynamic configuration updates in a Vert.x application, leveraging its watch feature to reactively handle changes.

• Configuration Management: Utilize etcd to manage application configuration dynamically.
• Asynchronous Handling: Ensure non-blocking operations using Vert.x's asynchronous model.

• Java Development Kit (JDK) 8 or higher
• Maven for dependency management
• Docker (optional, for running etcd in a containerized environment)

git clone https://github.com/Maverick-D-Aece/etcd-config-management-system.git
cd etcd-config-management-system

mvn clean package

If etcd is not available in your environment, you can run it using Docker Compose directly from IntelliJ or:

# need to re-check
docker-compose -d -f /infra/docker-compose.yml up 

Create a .env file in the project root and configure necessary environment variables:

ecms.etcd.endpoint=localhost
ecms.etcd.port=2379
ecms.config-mgmt-server.port=8080

java -jar target/<jar_file_name>.jar

• PUT /api/config: Update a configuration value in etcd.

  • Parameters:
    • key: The key of the configuration.
    • value: The new value to set.

• GET /api/config: Retrieve a configuration value from etcd.

  • Parameters:
    • key: The key of the configuration.

Put request to put configuration to etcd server

POST http:https://localhost:8080/api/config?key=/DAILY_LIMIT&value=500.00
Accept: text/plain

Get request to get a configuration from etcd server

GET http:https://localhost:8080/api/config?key=/DAILY_LIMIT
Accept: text/plain  

• etcd Connection Problems: Verify etcd configuration and connectivity.