provide a way to use pure spring-r2dbc without spring-data-r2dbc dependency

Right now this is impossible because the last line of R2dbcDsl requires spring-data-r2dbc dependency or else throws some java.lang.NoClassDefFoundError (for example on org/springframework/data/r2dbc/core/R2dbcEntityTemplate).

override fun initialize(context: GenericApplicationContext) {
    super.initialize(context)
    init()

    val properties = r2dbcProperties()

    R2dbcInitializer(properties, optionsCustomizers, transactional).initialize(context)
    R2dbcDataInitializer().initialize(context)
}

[sdeleuze]

Yeah good point, I guess we should put Spring Data config in a dedicated namespace with data { r2dbc { } } or dataR2dbc { }, same for JDBC.

[sdeleuze]

@pull-vert spring-r2dbc is very low level and the new spring-data-r2dbc that leverage it pretty lightweight, what is your use case for it?

@gytis-ivaskevicius Initializers are distincts so we should be able to use R2dbcInitializer in a potential Exposed support.