RethinkDB binding spec
The RethinkDB state store supports transactions which means it can be used to support Dapr actors. Dapr persists only the actor’s current state which doesn’t allow the users to track how actor’s state may have changed over time.
To enable users to track change of the state of actors, this binding leverages RethinkDB’s built-in capability to monitor RethinkDB table and event on change with both the
new state. This binding creates a subscription on the Dapr state table and streams these changes using the Dapr input binding interface.
Setup Dapr component
Create the following YAML file and save this to the
components directory in your application directory.
--components-path flag with
dapr run to point to your custom components dir)
apiVersion: dapr.io/v1alpha1 kind: Component metadata: name: changes spec: type: bindings.rethinkdb.statechange metadata: - name: address value: <REPLACE-RETHINKDB-ADDRESS> # Required, e.g. 127.0.0.1:28015 or rethinkdb.default.svc.cluster.local:28015). - name: database value: <REPLACE-RETHINKDB-DB-NAME> # Required, e.g. dapr (alpha-numerics only)
For example on how to combine this binding with Dapr Pub/Sub to stream state changes to a topic see here.
- Bindings building block
- How-To: Trigger application with input binding
- How-To: Use bindings to interface with external resources
- Bindings API reference