@prathameshkaratkar

Prathamesh Karatkar

@prathameshkaratkarJoined April 2024

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Prathamesh Karatkar's blogs

Prathamesh Karatkar's blogprathameshkaratkar.hashnode.dev26 posts

Event Sourcing Explained: Store What Happened, Not Just What Is

Event store, replay, snapshots, temporal queries, projections, idempotency and corrective events, explained with a CircuitCraft e-commerce order. Most backend applications remember the current state o

1d ago · 12 min readprathameshkaratkar.hashnode.dev

CQRS Explained Simply: Command Query Responsibility Segregation with a Spring Boot E-Commerce Example

Introduction While learning event-driven architecture, I reached a pattern that sounds heavy but is built on a very simple idea: CQRS. Before the Outbox pattern and CDC made sense to me, I had to unde

5d ago · 9 min readprathameshkaratkar.hashnode.dev

From Outbox to CDC: Building Reliable Event-Driven Systems with Transactional Outbox and Debezium

Table of contents Why this topic matters The problem: dual writes Why @Transactional alone does not fix it The Transactional Outbox pattern Implementing the outbox in Spring Boot Who moves outbox row

Oct 24 · 24 min readprathameshkaratkar.hashnode.dev

Transactional Outbox Pattern: Fixing the Dual-Write Problem in Spring Boot

1. The real-world problem In CircuitCraft, a customer places an order. Our Spring Boot OrderService has to do two things: Save the order in MySQL. Publish an OrderCreated event to RabbitMQ / Kafka. I

Oct 23 · 8 min readprathameshkaratkar.hashnode.dev

Async Systems Explained: Queues, Kafka and Event-Driven Patterns (with a Spring Boot Lens)

Examples come from CircuitCraft, an e-commerce project I use to make every concept concrete. Imagine a customer places an order on CircuitCraft. The system must save the order, generate an invoice, se

Oct 18 · 7 min readprathameshkaratkar.hashnode.dev

Prathamesh Karatkar

About

Available for

Prathamesh Karatkar's blogs

Event Sourcing Explained: Store What Happened, Not Just What Is

CQRS Explained Simply: Command Query Responsibility Segregation with a Spring Boot E-Commerce Example

From Outbox to CDC: Building Reliable Event-Driven Systems with Transactional Outbox and Debezium

Transactional Outbox Pattern: Fixing the Dual-Write Problem in Spring Boot

Async Systems Explained: Queues, Kafka and Event-Driven Patterns (with a Spring Boot Lens)

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Prathamesh Karatkar

About

Available for

Prathamesh Karatkar's blogs

Event Sourcing Explained: Store What Happened, Not Just What Is

CQRS Explained Simply: Command Query Responsibility Segregation with a Spring Boot E-Commerce Example

From Outbox to CDC: Building Reliable Event-Driven Systems with Transactional Outbox and Debezium

Transactional Outbox Pattern: Fixing the Dual-Write Problem in Spring Boot

Async Systems Explained: Queues, Kafka and Event-Driven Patterns (with a Spring Boot Lens)