Systems

The Pub-Sub Pattern for Business Events

Jay Banlasan

Jay Banlasan

The AI Systems Guy

tl;dr

When something happens in your business, multiple systems might need to know. Pub-sub solves this elegantly.

Something happens in your business. A new lead arrives. Multiple systems need to know: your CRM, your notification system, your scoring engine, your analytics.

The old approach: build a separate connection from the event to each system. The pub-sub pattern for business events is a better approach that scales cleanly.

What Pub-Sub Means

Pub-sub stands for publish-subscribe. When something happens (a lead arrives), the event gets published to a channel. Any system that cares about that event subscribes to the channel and receives the message.

The publisher does not know or care who is listening. The subscribers do not know or care about each other. They all just react to the event independently.

Why This Beats Direct Connections

With direct connections, adding a new system that needs lead data means building a new connection from the lead source to the new system. And testing it. And maintaining it.

With pub-sub, adding a new system means subscribing to the existing channel. The lead source does not change. No existing connections are affected. The new system just starts listening.

Business Applications

The pub-sub pattern for business events works anywhere one event triggers multiple actions.

New customer signs up: CRM gets updated, welcome email sends, onboarding checklist creates, analytics logs the conversion, sales team gets notified. Five subscribers to one event.

Campaign spend exceeds threshold: budget alert fires, daily summary adjusts, optimization engine recalculates, stakeholder gets notified. Four subscribers to one event.

The Decoupling Advantage

Pub-sub decouples your systems. If the notification system goes down, the CRM still updates. If analytics is slow, lead scoring still runs on time.

Each subscriber operates independently. One failure does not cascade to the others. This resilience is built into the pattern.

Getting Started

You do not need enterprise message broker software. Webhook-based workflows in tools like Zapier or Make function as simple pub-sub systems. One trigger publishes the event. Multiple downstream workflows subscribe.

As your operations grow, you might upgrade to dedicated message queues. But the pattern stays the same.

Implementing This in Your Business

The technical concepts behind pub sub pattern business translate directly into business value when implemented correctly.

Start with a simple version. You do not need enterprise-grade infrastructure on day one. A basic implementation that works reliably beats a sophisticated one that never ships.

Build it. Test it. Run it alongside your current process for two weeks. Compare the results. Once you trust the new approach, migrate fully.

The implementation details vary by business, but the principle stays constant: start simple, measure everything, and iterate based on real data. That approach produces reliable systems regardless of the technical complexity involved.

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