Messaging

A checkout API can wait until every step finishes, or accept an order and complete work later. The first path gives the caller an immediate final answer but cou…

RabbitMQ is a broker: producers publish messages; exchanges route them; queues buffer work; consumers process and acknowledge. The same building blocks combine …

Asynchronous messaging decouples services in time — producers send without waiting for consumers. Kafka is a distributed event log for high-throughput streams a…

A signup service inserts a new User row, then calls the broker to publish UserRegistered so the welcome-email and loyalty services can react. The database commi…

An invoicing consumer reads InvoiceApproved from a queue, calls the payment processor to charge the card, and commits its offset. The broker redelivers the mess…

A consumer service scales from two instances to eight expecting throughput to climb accordingly — instead, six of the eight sit idle while the same two partitio…

Selecting a messaging system for microservice communication involves balancing throughput, footprint complexity, and persistence guarantees. Heavy enterprise me…

While traditional event streaming platforms like Apache Kafka store message logs directly on local broker disks, coupling message routing compute with physical …

Apache Kafka revolutionized event streaming by implementing a append-only distributed log model where message ordering is guaranteed within partition topic logs…