Go and Postgres Listen/Notify or: How I Learned to Stop Worrying and Love PubSub

This post explains how to implement PubSub functionality using PostgreSQL's Listen/Notify feature in Golang applications. Unlike traditional PubSub systems that rely on message brokers like Redis, PostgreSQL's Listen/Notify allows for an efficient, single-system solution. The author discusses the use of pgx for connection management, introduces a custom Notifier package, and provides code examples illustrating how to set up a listener, notifier, and subscription system efficiently. Key points include handling notifications, managing subscriptions, and dealing with blocking calls.