Introduced transactional service using @Transactional on the method declaration. Using the experimental Spring Boot integration to get both an H2ConnectionFactory and R2dbcTransactionManager configured. Added test case to show the rollbacks kicking in on an exception in a map operator.
Upgrade to R2DBC Arabba M7 and Spring Data R2DBC snapshots. Switched configuration to use H2 instead of Postgres. Changed query definition in Spring Data repository to use named parameters instead of database specific placeholders.
AbstractR2dbcConfiguration was moved from org.springframework.data.r2dbc.repository.config.AbstractR2dbcConfiguration to org.springframework.data.r2dbc.config.AbstractR2dbcConfiguration.