Support transactionManagerRef in @EnableJdbcRepositories

JPA has support for this option, this is very helpful when dealing with multiple datasources.o
Ticket: https://jira.spring.io/browse/DATAJDBC-321

Author: asauray

spring-data-jdbc/src/main/java/org/springframework/data/jdbc/repository/config/EnableJdbcRepositories.java

@@ -27,6 +27,8 @@
 import org.springframework.context.annotation.Import;
 import org.springframework.data.jdbc.repository.support.JdbcRepositoryFactoryBean;
 import org.springframework.data.repository.config.DefaultRepositoryBaseClass;
+import org.springframework.jdbc.datasource.DataSourceTransactionManager;
+import org.springframework.transaction.PlatformTransactionManager;
 
 /**
  * Annotation to enable JDBC repositories. Will scan the package of the annotated configuration class for Spring Data
@@ -121,4 +123,10 @@
 	 */
 	String dataAccessStrategyRef() default "";
 
+    /**
+	 * Configures the name of the {@link DataSourceTransactionManager} bean definition to be used to create repositories
+	 * discovered through this annotation. Defaults to {@code transactionManager}.
+	 */
+	String transactionManagerRef() default "transactionManager";
+
 }

spring-data-jdbc/src/main/java/org/springframework/data/jdbc/repository/config/JdbcRepositoryConfigExtension.java

@@ -19,6 +19,7 @@
 import java.util.Collection;
 import java.util.Collections;
 import java.util.Locale;
+import java.util.Optional;
 
 import org.springframework.beans.factory.support.BeanDefinitionBuilder;
 import org.springframework.data.jdbc.repository.support.JdbcRepositoryFactoryBean;
@@ -37,6 +38,8 @@
  */
 public class JdbcRepositoryConfigExtension extends RepositoryConfigurationExtensionSupport {
 
+	private static final String DEFAULT_TRANSACTION_MANAGER_BEAN_NAME = "transactionManager";
+
 	/*
 	 * (non-Javadoc)
 	 * @see org.springframework.data.repository.config.RepositoryConfigurationExtension#getModuleName()
@@ -78,6 +81,9 @@ public void postProcess(BeanDefinitionBuilder builder, RepositoryConfigurationSo
 		source.getAttribute("dataAccessStrategyRef") //
 				.filter(StringUtils::hasText) //
 				.ifPresent(s -> builder.addPropertyReference("dataAccessStrategy", s));
+
+		Optional<String> transactionManagerRef = source.getAttribute("transactionManagerRef");
+		builder.addPropertyValue("transactionManager", transactionManagerRef.orElse(DEFAULT_TRANSACTION_MANAGER_BEAN_NAME));
 	}
 
 	/**

spring-data-jdbc/src/test/java/org/springframework/data/jdbc/repository/config/EnableJdbcRepositoriesIntegrationTests.java

@@ -133,6 +133,7 @@ static class DummyEntity {
 	@EnableJdbcRepositories(considerNestedRepositories = true,
 			includeFilters = @ComponentScan.Filter(type = FilterType.ASSIGNABLE_TYPE, classes = DummyRepository.class),
 			jdbcOperationsRef = "qualifierJdbcOperations", dataAccessStrategyRef = "qualifierDataAccessStrategy",
+			transactionManagerRef = "transactionManager",
 			repositoryBaseClass = DummyRepositoryBaseClass.class)
 	static class TestConfiguration {
 

spring-data-jdbc/src/test/java/org/springframework/data/jdbc/testing/TestConfiguration.java

@@ -81,8 +81,8 @@ NamedParameterJdbcOperations namedParameterJdbcTemplate() {
 		return new NamedParameterJdbcTemplate(dataSource);
 	}
 
-	@Bean
-	PlatformTransactionManager transactionManager() {
+	@Bean(name = "transactionManager")
+	PlatformTransactionManager defaultTransactionManager() {
 		return new DataSourceTransactionManager(dataSource);
 	}