Azure Service Bus

Core Functionality

1. Message Queues: Supports message queues to enable one-to-one (point-to-point) communication, ensuring reliable and ordered delivery of messages.
2. Topics and Subscriptions: Implements publish-subscribe messaging with topics and subscriptions, allowing one-to-many communication for broadcasting messages to multiple subscribers.
3. Message Sessions: Provides sessions to group related messages for ordered and transactional processing, ensuring that messages are processed in sequence.
4. Dead-Letter Queue: Automatically handles undeliverable messages using dead-letter queues, allowing for better error handling and diagnostics.
5. Scheduled Messages: Allows scheduling of messages for future delivery, enabling time-based message processing.
6. Security and Compliance: Ensures secure communication with features like Transport Layer Security (TLS), Shared Access Signatures (SAS), and Role-Based Access Control (RBAC).

Architecture Design Considerations

• Scalability: Design your architecture to take advantage of Service Bus’s ability to handle high-throughput workloads by using topics and subscriptions for broadcast messaging and message queues for point-to-point communication.
• Reliability: Implement dead-letter queues to handle undeliverable messages and ensure robust error handling.
• Security: Use Transport Layer Security (TLS) to encrypt messages in transit and Shared Access Signatures (SAS) to control access to Service Bus resources.
• Integration: Integrate Service Bus with other Azure services, such as Azure Functions and Azure Logic Apps, to build comprehensive and automated workflows.

Pricing

Azure Service Bus offers a tiered pricing model based on the messaging operations, message size, and features used. There are three tiers: Basic, Standard, and Premium, each offering different levels of features and capabilities to meet various business needs.

References

• Azure Service Bus Overview
• Azure Service Bus Pricing