Event routing, filtering, and system Events

Develop Azure Event-based and Message-based Solutions

Fiodar Sazanavets

Senior Software Engineer and Microsoft MVP

MQTT overview

Message Queuing Telemetry Transport (MQTT).
Used in Internet of Things (IoT) setups.
Multiple devices, such as weather stations, send data continuously.
Measurements include temperature and humidity.
MQTT enables communication between devices and a server.
Designed for low-bandwidth networks.
Supports high-latency or unreliable connections.
Common for sensors in outdoor or remote locations.

Event driven architecture

Common for sensors in outdoor or remote locations.

Event filtering

Event filtering

Event filtering in Event Grid

Event Grid has filtering capabilities.
Can filter events on:
- Subject.
- Event type.
- Properties in event data.
Advanced filtering refines the results.
- Greater than.
- Contains.

Event grid filtering

Event routing

Event routing

Event Grid uses publish-subscribe model.
Publishers publish events to topics.
Subscriptions define destinations.
- Data processing pipeline.
- Azure Function.
- A storage system.
Required for MQTT.

System events

Pre-defined events emitted by Azure services.
- Azure storage emits blob created and blob deleted.
- IoT hub lifecycle events: connected, disconnected.
System topics created automatically.

Event grid is key in filtering events

MQTT helps IoT telemetry reach the cloud.
Filtering controls which events are processed.
System events integrate with the system.

Lesson recap

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Develop Azure Event-based and Message-based Solutions

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