Annotation Type EnableTransactionManagement
http://docs.spring.io/spring/docs/current/javadoc-api/org/springframework/transaction/annotation/EnableTransactionManagement.html
Annotation Type EnableTransactionManagement
@Target(value=TYPE)
@Retention(value=RUNTIME)
@Documented
@Import(value=TransactionManagementConfigurationSelector.class)
public @interface EnableTransactionManagementEnables Spring's annotation-driven transaction management capability, similar to the support found in Spring's<tx:*>
XML namespace. To be used on@Configuration
classes as follows:@Configuration
@EnableTransactionManagement
public class AppConfig { @Bean
public FooRepository fooRepository() {
// configure and return a class having @Transactional methods
return new JdbcFooRepository(dataSource());
} @Bean
public DataSource dataSource() {
// configure and return the necessary JDBC DataSource
} @Bean
public PlatformTransactionManager txManager() {
return new DataSourceTransactionManager(dataSource());
}
}For reference, the example above can be compared to the following Spring XML configuration:
<beans> <tx:annotation-driven/> <bean id="fooRepository" class="com.foo.JdbcFooRepository">
<constructor-arg ref="dataSource"/>
</bean> <bean id="dataSource" class="com.vendor.VendorDataSource"/> <bean id="transactionManager" class="org.sfwk...DataSourceTransactionManager">
<constructor-arg ref="dataSource"/>
</bean> </beans>
In both of the scenarios above,
@EnableTransactionManagement
and<tx:annotation-driven/>
are responsible for registering the necessary Spring components that power annotation-driven transaction management, such as the TransactionInterceptor and the proxy- or AspectJ-based advice that weave the interceptor into the call stack whenJdbcFooRepository
's@Transactional
methods are invoked.A minor difference between the two examples lies in the naming of the
PlatformTransactionManager
bean: In the@Bean
case, the name is "txManager" (per the name of the method); in the XML case, the name is"transactionManager". The<tx:annotation-driven/>
is hard-wired to look for a bean named "transactionManager" by default, however@EnableTransactionManagement
is more flexible; it will fall back to a by-type lookup for anyPlatformTransactionManager
bean in the container. Thus the name can be "txManager", "transactionManager", or "tm": it simply does not matter.For those that wish to establish a more direct relationship between
@EnableTransactionManagement
and the exact transaction manager bean to be used, theTransactionManagementConfigurer
callback interface may be implemented - notice theimplements
clause and the@Override
-annotated method below:@Configuration
@EnableTransactionManagement
public class AppConfig implements TransactionManagementConfigurer { @Bean
public FooRepository fooRepository() {
// configure and return a class having @Transactional methods
return new JdbcFooRepository(dataSource());
} @Bean
public DataSource dataSource() {
// configure and return the necessary JDBC DataSource
} @Bean
public PlatformTransactionManager txManager() {
return new DataSourceTransactionManager(dataSource());
} @Override
public PlatformTransactionManager annotationDrivenTransactionManager() {
return txManager();
}
}This approach may be desirable simply because it is more explicit, or it may be necessary in order to distinguish between two
PlatformTransactionManager
beans present in the same container. As the name suggests, theannotationDrivenTransactionManager()
will be the one used for processing@Transactional
methods. SeeTransactionManagementConfigurer
Javadoc for further details.The
mode()
attribute controls how advice is applied; if the mode isAdviceMode.PROXY
(the default), then the other attributes control the behavior of the proxying.If the mode() is set to
AdviceMode.ASPECTJ
, then theproxyTargetClass()
attribute is obsolete. Note also that in this case thespring-aspects
module JAR must be present on the classpath.- Since:
- 3.1
- Author:
- Chris Beams
- See Also:
TransactionManagementConfigurer
,TransactionManagementConfigurationSelector
,ProxyTransactionManagementConfiguration
,AspectJTransactionManagementConfiguration
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