Issue

Did not find how to make Modulith transactional events work in a R2DBC context. We tested:

• org.springframework.experimental:spring-modulith-jdbc required a jdbcTemplate to work properly
• Adding org.springframework.boot:spring-boot-starter-data-jdbc or simply org.springframework.boot:spring-boot-starter-jdbc with spring.datasource.xxx configurations in application.properties failed. Probably because of org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration which works only when @ConditionalOnMissingBean(type = "io.r2dbc.spi.ConnectionFactory") is satisfied...
• So we provided a Datasource and a jdbcTemplate manually. But the reactive transaction manager throw an exception because of org.springframework.experimental:spring-modulith-jdbc : java.lang.IllegalStateException: Cannot apply reactive transaction to non-reactive return type: interface java.util.List

We are waiting for:

• spring-projects/spring-modulith#174

In the meantime we only use non-transactional events

Getting started

Before running the service locally, you will need the following:

• Zulu OpenJDK 17
• Docker & Docker-compose
• Gradle
• Makefile
• grpcurl

Build the project

./gradlew clean build --info

Run the project

make up-local && ./gradlew clean bootRun --info
grpcurl --plaintext -d '{}' localhost:8000 acme.process_design.v1.QueryService/ListSkills

Tips

You can show internals components with the following configuration:

new Documenter(modules).writeDocumentation(Documenter.DiagramOptions.defaults(), Documenter.CanvasOptions.defaults().revealInternals());