Banking Workflow System

A mini project implementing banking workflow system using Spring Boot, PostgreSQL, Golang, and gRPC.

Project Overview

This project implements a banking workflow system with features including:

• Limit checking
• Financial matrix checking
• User authentication & authorization
• Role-based access control
• Workflow management using Camunda BPM

Technology Stack

Core Technologies

• Java 17
• Spring Boot 3.x
• PostgreSQL
• Golang
• gRPC
• Camunda BPM
• Docker

Additional Tools

• Maven
• Git
• Docker Compose

Project Phases

Phase 1: Project Setup and Basic Infrastructure

1. Initial Setup

• Set up Spring Boot project with dependencies
  • Camunda BPM
  • Spring Security
  • PostgreSQL
  • gRPC
• Configure PostgreSQL database
• Set up basic project structure
• Configure application properties

2. Authentication & Authorization

• Implement custom authentication service
• Integrate with KMS (Key Management System)
• Set up role-based access control (RBAC)
• Create user management APIs
• Implement token-based authentication

Phase 2: Core Banking Workflow Components

3. Design Basic Workflow

• Create BPMN workflow diagrams using Camunda Modeler
• Implement basic workflow steps:
  • User request initiation
  • Basic validation
  • Approval process
• Test workflow execution

4. Implement Core Services

• Create service layer for:
  • Limit checking service
  • Financial matrix validation
  • Transaction processing
• Implement error handling
• Add logging and monitoring

Phase 3: Advanced Features and Integration

5. Golang Service Integration

• Set up Golang project structure
• Implement gRPC services
• Create Proto definitions
• Implement business logic services
• Set up Java-Golang communication

6. Advanced Workflow Features

• Implement approval matrices
• Add dynamic routing
• Implement timeout handling
• Add workflow versioning

Phase 4: Security and Validation

7. Enhanced Security

• Implement additional security layers
• Add input validation
• Implement audit logging
• Add transaction signing

8. Business Rules Implementation

• Create business rule engine
• Implement validation rules
• Add limit checking rules
• Implement matrix approval rules

Phase 5: Testing and Documentation

9. Testing

• Unit tests
• Integration tests
• Performance tests
• Security tests

10. Documentation

• API documentation
• Workflow documentation
• Setup guide
• User guide

banking-workflow/ ├── workflow-service (Java) │ ├── src/main/java │ │ ├── config │ │ ├── controller │ │ ├── model │ │ ├── repository │ │ ├── service │ │ └── security │ ├── src/main/resources │ │ ├── bpmn │ │ └── application.yml │ └── src/test │ ├── business-service (Golang) │ ├── cmd │ ├── internal │ │ ├── service │ │ ├── repository │ │ └── model │ └── pkg │ ├── proto │ └── banking │ └── v1 │ └── docker ├── docker-compose.yml └── Dockerfile

Setup Instructions

Prerequisites

1. Java 17
2. Go 1.19+
3. PostgreSQL
4. Docker & Docker Compose
5. Maven