Cashcard Application

This project demonstrates a simple, event-driven system using Spring Cloud Stream, Kafka, and Spring Boot with GraalVM native images. All services are designed to run within a Docker environment.

Prerequisites

• Java 21+
• Docker and Docker Compose

Building and Running the System

The entire system, including the applications and the end-to-end tests, is managed through Docker Compose.

1. Build the Application Docker Images

First, build the native Docker images for the source, enricher and sink services using the Spring Boot Gradle plugin.

$ ./gradlew clean bootBuildImage

To run everything in docker containers:

$ docker compose up -d --build

Application's Endpoint URL:

http://localhost:8080/pub

HTTP Method: POST

Example Payload:

{
    "id": 1234,
    "cashCard": {
        "id": 12345,
        "owner": "testOwner",
        "amountRequestedForAuth": "3.14"
    }
}

Architecture Overview