feat(pubsub): add support for subscription names to enable multiple s… #1657
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Could you please sign your commits so it passes the DCO check? I'm not quite following why you'd want this - do you just want to be able to kick off multiple callbacks in response to the same message? Is the point of the name just to differentiate locally (given that the runtime isn't providing it)? |
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I would be very surprised if this was all that was required to enable multiple subscriptions to the same topic from the same app because there has been many attempts to discuss this on the runtime and its never resulted in anything. IIRC Streaming Subscriptions is the way to go about, although I've not personally tested if this works (allows you to subscribe to the same topic more than once within an App) cc @WhitWaldo |
…ubscriptions per topic Introduces subscription name support across topic metadata, attributes, and routing logic to allow multiple distinct subscriptions to the same topic within a single application. Enhances topic attributes and subscription models with an optional subscription name to differentiate subscription handlers. Updates routing and subscription grouping to incorporate subscription names for precise subscription management. Adds example handlers and integration tests demonstrating multiple subscriptions to the same topic distinguished by subscription names. This improvement enables advanced pubsub scenarios where separate subscription handlers can independently process messages from the same topic without conflict. Signed-off-by: Anatoliy Kolodkin <[email protected]>
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I'm going to have to check with the runtime maintainers on this one. I can't find anything in the documentation that suggests this is something that's intended to be supported with traditional subscriptions. While it passes integration tests and presumably works against whatever pubsub provider you're using, I'm loathe to merge something into the SDK that works for some pubsub providers, but might not work for others as an open question. |
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#1656
The Issue
The Dapr .NET SDK currently does not support creating multiple subscriptions to the same topic within a single application using programmatic subscriptions (via the
/dapr/subscribeendpoint). This limitation exists because:pubsubName + topic- There is no subscription name fieldmetadata.namebut programmatic subscriptions do notSolution
Add subscription name support to allow multiple named subscriptions to the same topic within a single application.