jakesmolka/dapr-pubsub-java-example

Dapr Pub & Sub Java Example

Based on https://docs.dapr.io/developing-applications/building-blocks/pubsub/howto-publish-subscribe/

UPDATE: This now preserves the not working state to aid this issue: dapr/docs#2193

Goal

Have two services - 'checkout' and 'orderprocessing' - subscribe and publish to the message broker, respectively.

Run

Have Dapr up and running like explained in the docs.

In one terminal:

cd demo-checkout
dapr run --app-id checkout --app-port 6002 --dapr-http-port 3602 --dapr-grpc-port 60002 --components-path ../my-components mvn spring-boot:run

In another terminal:

cd demo-order
dapr run --app-id orderprocessing --app-port 6001 --dapr-http-port 3601 --dapr-grpc-port 60001 --components-path ../my-components mvn spring-boot:run

Problem

Both apps are running and are able to do what they should, each individually, in isolation. But apparently the checkout app is not hooked up to the message stream as subscriber. Or in other words, its getCheckout method is never invoked, neither with the correct input published by the orderprocessing app (as it should) nor in any other capacity.

Zipkin shows published events by orderprocessing.