#440 - Create R2dbcEntityTemplate in R2dbcRepositoryFactoryBean.

We now create R2dbcEntityTemplate as part of R2dbcRepositoryFactoryBean initialization if the factory bean was configured with DatabaseClient and DataAccessStrategy only. Creating the template in the factory bean allows collecting entity callbacks for repository usage.

src/test/java/org/springframework/data/r2dbc/repository/AbstractR2dbcRepositoryIntegrationTests.java

@@ -366,6 +366,7 @@ public abstract class AbstractR2dbcRepositoryIntegrationTests extends R2dbcInteg
 	@AllArgsConstructor
 	@NoArgsConstructor
 	@Getter
+	@Setter
 	static class Lego {
 		@Id Integer id;
 	}

src/test/java/org/springframework/data/r2dbc/repository/PostgresR2dbcRepositoryIntegrationTests.java

@@ -37,12 +37,14 @@ import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.FilterType;
 import org.springframework.data.annotation.Id;
 import org.springframework.data.r2dbc.config.AbstractR2dbcConfiguration;
+import org.springframework.data.r2dbc.mapping.event.BeforeConvertCallback;
 import org.springframework.data.r2dbc.repository.config.EnableR2dbcRepositories;
 import org.springframework.data.r2dbc.repository.support.R2dbcRepositoryFactory;
 import org.springframework.data.r2dbc.testing.ExternalDatabase;
 import org.springframework.data.r2dbc.testing.PostgresTestSupport;
 import org.springframework.data.repository.reactive.ReactiveCrudRepository;
 import org.springframework.jdbc.core.JdbcTemplate;
+import org.springframework.r2dbc.core.DatabaseClient;
 import org.springframework.test.context.ContextConfiguration;
 import org.springframework.test.context.junit4.SpringRunner;
 
@@ -70,6 +72,23 @@ public class PostgresR2dbcRepositoryIntegrationTests extends AbstractR2dbcReposi
 		public ConnectionFactory connectionFactory() {
 			return PostgresTestSupport.createConnectionFactory(database);
 		}
+
+		@Bean
+		public BeforeConvertCallback<LegoSet> autogeneratedId(DatabaseClient client) {
+
+			return (entity, table) -> {
+
+				if (entity.getId() == null) {
+					return client.sql("SELECT nextval('person_seq');") //
+							.map(row -> row.get(0, Integer.class)) //
+							.first() //
+							.doOnNext(entity::setId) //
+							.thenReturn(entity);
+				}
+
+				return Mono.just(entity);
+			};
+		}
 	}
 
 	@Override
@@ -84,7 +103,7 @@ public class PostgresR2dbcRepositoryIntegrationTests extends AbstractR2dbcReposi
 
 	@Override
 	protected String getCreateTableStatement() {
-		return PostgresTestSupport.CREATE_TABLE_LEGOSET_WITH_ID_GENERATION;
+		return PostgresTestSupport.CREATE_TABLE_LEGOSET + ";CREATE SEQUENCE IF NOT EXISTS person_seq;";
 	}
 
 	@Override