I tried to use @Transactional
annotation in spring
and mybatis
using mybatis-spring
dependency. This is the service layer.
@Service
public class OracleService {
@Autowired
private TestMapper mapper;
@Autowired
private PlatformTransactionManager transactionManager;
@Transactional(propagation = Propagation.REQUIRED,
rollbackFor = Exception.class,
value = "transactionManager")
void insert1() {
TestModel testModel = new TestModel(1, "title1", "content1");
mapper.insert(testModel);
throw new RuntimeException();
}
}
As you can see, a RuntimeException
is thrown out in insert1()
, so the insert operation should fail. But in fact, it didn't. The record was inserted successfully. Why?
Here is my main method.
public class Launcher {
public static void main(String[] args) {
ApplicationContext cxt = new ClassPathXmlApplicationContext("spring-config.xml");
OracleService oracleService = cxt.getBean(OracleService.class);
try {
oracleService.insert1();
} catch(Exception e) {
System.out.println("Exception occurred!");
}
}
}
Spring configuration.
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd">
<context:component-scan base-package="com.database.learn"/>
<bean id="oracleDataSource" class="oracle.jdbc.pool.OracleDataSource">
<property name="URL" value="OracleJdbcUrl"/>
<property name="user" value="user"/>
<property name="password" value="password"/>
</bean>
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="oracleDataSource"/>
<property name="configLocation" value="classpath:mybatis-config.xml"/>
</bean>
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="oracleDataSource" />
</bean>
<bean id="testMapper" class="org.mybatis.spring.mapper.MapperFactoryBean">
<property name="mapperInterface" value="com.database.learn.TestMapper"/>
<property name="sqlSessionFactory" ref="sqlSessionFactory"/>
</bean>
<tx:annotation-driven transaction-manager="transactionManager" />
</beans>
I used the following dependencies in pom.xml
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.4.1</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.3.0</version>
</dependency>
<dependency>
<groupId>com.oracle</groupId>
<artifactId>ojdbc6</artifactId>
<version>11.2.0.3</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>4.3.2.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>4.3.2.RELEASE</version>
</dependency>
The @Transactional annotation makes use of the attributes rollbackFor or rollbackForClassName to rollback the transactions, and the attributes noRollbackFor or noRollbackForClassName to avoid rollback on listed exceptions. The default rollback behavior in the declarative approach will rollback on runtime exceptions.
The @Transactional annotation is metadata that specifies that an interface, class, or method must have transactional semantics; for example, "start a brand new read-only transaction when this method is invoked, suspending any existing transaction".
Transactional annotation provides the application the ability to declaratively control transaction boundaries on CDI managed beans, as well as classes defined as managed beans by the Java EE specification, at both the class and method level where method level annotations override those at the class level.
@Transactional annotation is used when you want the certain method/class(=all methods inside) to be executed in a transaction.
As @M.Deinum metioned, I have to make the method where @Transactional
applied public, in other words, I have to change
@Transactional(propagation = Propagation.REQUIRED)
void insert1() {
TestModel testModel = new TestModel(1, "title1", "content1");
mapper.insert(testModel);
throw new RuntimeException();
}
to
@Transactional(propagation = Propagation.REQUIRED)
public void insert1() {
TestModel testModel = new TestModel(1, "title1", "content1");
mapper.insert(testModel);
throw new RuntimeException();
}
The reason is written in the spring documentation.
Method visibility and @Transactional
When using proxies, you should apply the @Transactional annotation only to methods with public visibility. If you do annotate protected, private or package-visible methods with the @Transactional annotation, no error is raised, but the annotated method does not exhibit the configured transactional settings. Consider the use of AspectJ (see below) if you need to annotate non-public methods.
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