Autoconfigure R2DBC support for Cloud SQL

When using the Spring Cloud GCP Cloud SQL PostgreSQL starter (spring-cloud-gcp-starter-sql-postgresql) you get a JDBC-based stack using org.springframework.boot:spring-boot-starter-jdbc and the org.postgresql:postgresql JDBC driver.

For Spring WebFlux applications I would like to be able to use Cloud SQL via R2DBC instead of JDBC.

I can use R2DBC with Spring Boot and a plain PostgreSQL database via org.springframework.boot:spring-boot-starter-data-r2dbc and the io.r2dbc:r2dbc-postgresql R2DBC driver for PostgreSQL.

I have found https://github.com/GoogleCloudPlatform/cloud-sql-jdbc-socket-factory/blob/master/r2dbc-postgres and an example project at https://github.com/GoogleCloudPlatform/java-docs-samples/tree/master/cloud-sql/r2dbc that shows what dependencies to add and how to create a ConnectionFactory bean, but it would be great if Spring Cloud GCP would have a starter and auto-configuration for this, so Spring Cloud GCP users don’t need to manage and configure these dependencies.

[olaf-2]

Yes, did not work. Now I retried with this little :gcp: in the URL I had overlooked and it works. (⌒_⌒;) Thanks.

[elefeint]

It does in that we can make the correct ConnectionFactory creation automatic given a dependency on R2DBC and socket factory. I’ll update the issue title to reflect that.