How to Use Azure Service Bus for Reliable Messaging: A Practical Tutorial

Imagine the internet as a web of computers, with each playing its unique role. Some generate data, some consume it, and others process it. Nonetheless, how do they consistently communicate seamlessly, even if they are kilometers away from each other?

For this, Azure Service Bus works as the internet’s air traffic controller as it allows messages to travel securely and be reliably directed to where they want to go. This is exactly the back end of a messaging system.

In this guide, I’ll teach you how to deploy the forces of topics and subscriptions to lay an unyielding base for your application’s messaging infrastructure beyond the fundamentals.

Laying the Groundwork: Azure Service Bus Basics

If you're new to Azure Service Bus, or just need quick guidance, head over to my previous blog post. This part will help you to create your own Azure Service Bus instance as a beginner.

When you're ready, head back here and we'll dive into some exciting topics & subscriptions!

Topics and Subscriptions: The Dynamic Duo

Think of topics as channels in a messaging system. They help you categorize messages based on their purpose or content. For example, you could have a topic for "Order Processing" and another for "Inventory Updates."

Subscriptions, on the other hand, are basically filters for those channels. It provides you with that feature where can subscribe to certain topics and get messages when YOU need them. This ensures that each application only gets the information it needs, making your system more efficient and organized.

Why Use Topics and Subscriptions?

• Flexibility: You can easily add or remove subscribers without affecting other parts of the system.
• Scalability: Topics and subscriptions can handle a large volume of messages without slowing down your applications.
• Filtering: You can apply filters to subscriptions to further refine the messages they receive.
• Security: You can control who has access to which topics and subscriptions, ensuring that only authorized applications can communicate.

Step-by-Step Guide: Creating Topics and Subscriptions

Now, let's get hands-on!

1. Sign in to the Azure portal.
2. Navigate to your Service Bus namespace. Click on "Overview" in the left-hand menu.
3. Create a New Topic: Click "+ Topic" on the toolbar.

Read more at https://umeshpandit.hashnode.dev/how-to-use-azure-service-bus-for-reliable-messaging-a-practical-tutorial

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