System Design: Event-Driven Document Processing System (Scalable Architecture)
Introduction Modern enterprises deal with massive volumes of documents—PDFs, invoices, contracts, and forms. Traditional synchronous systems struggle with scalability and performance. 👉 This is where event-driven architecture (EDA) comes in. An event-driven document processing system leverages asynchronous events to process documents efficiently, enabling scalability, fault tolerance, and real-time processing . đź–Ľ️ High-Level Architecture 🔄 Flow Overview: Document Upload (Event Producer) Event Broker (Kafka / Queue) Processing Services (OCR, validation, metadata extraction) Workflow Engine (Camunda) Storage (DB / DMS like Alfresco) Notification / API 🔑 Core Concepts đź“Ś Event-Driven Architecture EDA is based on: Event Producers Event Consumers Event Channels 👉 Systems react to events asynchronously, enabling loose coupling and scalability. đź“Ś Event Broker Use Apache Kafka as the backbone: High throughput Distributed streaming Fault-tolerant messaging đź“Ś Workflow Orchestrati...