Latest Event-Driven Architecture Articles

Amazon EventBridge is a serverless event integration service from AWS. It allows applications, AWS services, and supported third-party systems to publish events and route them to interested consumers. Instead of making synchronous requests to every downstream service, a producer emits a business eve

Amazon Simple Notification Service (Amazon SNS) is a fully managed publish/subscribe messaging service from AWS. It allows applications to publish messages to a topic and automatically distribute those messages to subscribed endpoints, including Amazon SQS queues, AWS Lambda functions, HTTP endpoint

A webhook is a mechanism that allows one application to notify another application when a specific event occurs. Instead of repeatedly requesting updates, the receiving application exposes an HTTP endpoint, and the sending application delivers an HTTP request containing information about the event.

The Transactional Outbox Pattern reliably coordinates a database change with publishing a message or event. Instead of updating the database and sending a message as two independent operations, the application writes both the business data and an outbox record in the same database transaction.

Publish/Subscribe (Pub/Sub) is a messaging pattern where producers publish messages to a topic without knowing which consumers will receive them. Consumers subscribe to topics and receive the messages that are relevant to them.

Message brokers are more than infrastructure for moving messages between services. Production systems depend on a set of recurring message broker patterns that determine how work is distributed, how events are broadcast, how failures are retried, how duplicates are handled, and how services remain c

CQRS , or Command Query Responsibility Segregation , is an architectural pattern that separates operations that change application state from operations that read application state.

A Transactional Outbox is a reliability pattern that keeps a database change and the event or message describing that change consistent without requiring a distributed transaction between the database and a message broker.

Kafka makes it possible to connect services through durable event streams instead of synchronous request chains. The difficult part is not publishing records; it is deciding what should be an event, who owns it, how services change state safely, how failures are retried, and how schemas evolve witho

Apache Kafka is a distributed event-streaming platform designed for moving large volumes of records between systems while keeping those records durable, ordered within defined boundaries, and available for later replay.

A notification system delivers messages to users through channels such as mobile push, email, and SMS. Sending one notification is straightforward. Sending millions reliably becomes a distributed-systems problem involving asynchronous processing, fan-out, user preferences, provider rate limits, retr

Message queues help distributed systems process work asynchronously, absorb traffic spikes, isolate failures, and decouple producers from consumers. They are commonly used for background jobs, order processing, notifications, logistics workflows, data pipelines, payments, and communication between m

Distributed applications often need to update a database and publish a message as part of one business operation. An order service may save a confirmed order and publish an order.confirmed event. A payment service may record a successful charge and notify fulfilment. If one action succeeds while the

Message processing does not always succeed on the first attempt. A database may be temporarily unavailable, an external API may return a rate-limit response, a network request may time out, or a message may contain invalid data that can never be processed successfully. Reliable messaging systems mus

Event-driven architecture allows distributed components to communicate by publishing facts about completed business actions. Instead of calling every dependent service directly, a service publishes an event such as order.created , payment.completed , or shipment.delivered . Other services process th

Modern applications often need to perform work that should not block the main request. An order service may need to reserve inventory, send a confirmation email, update analytics, and notify a warehouse. Executing every operation synchronously increases response time and creates direct dependencies