In this quickstart, you'll create a publisher microservice and a subscriber microservice to demonstrate how Dapr enables a publish-subcribe pattern. The publisher will generate messages of a specific topic, while subscribers will listen for messages of specific topics. See Why Pub-Sub to understand when this pattern might be a good choice for your software architecture.
For more details about this quickstart example please see the Pub-Sub Quickstart documentation.
Visit this link for more information about Dapr and Pub-Sub.
Note: This example leverages the Dapr client SDK. If you are looking for the example using only HTTP
requests
click here.
This quickstart includes one publisher:
- Python client message generator
checkout
And one subscriber:
- Python subscriber
order-processor
For this example, you will need:
- Install dependencies:
cd ./order-processor
pip3 install -r requirements.txt
- Run the Python subscriber app with Dapr:
dapr run --app-id order-processor --components-path ../components/ --app-port 5001 -- python3 app.py
- Install dependencies:
cd ./checkout
pip3 install -r requirements.txt
- Run the Python publisher app with Dapr:
dapr run --app-id checkout --components-path ../components/ -- python3 app.py
dapr stop --app-id checkout
dapr stop --app-id order-processor
- Deploy to Azure for dev-test
NOTE: make sure you have Azure Dev CLI pre-reqs here
azd up