我开始使用 TDD 编写以下代码:
@Component("GrantingOfLoanSagaManager")
public class GrantingOfLoanSagaManager implements
SagaManager {
private ApplicationContext applicationContext;
@PersistenceContext
private EntityManager entityManager;
public GrantingOfLoanData createNewSagaData(AggregateId id ) {
GrantingOfLoanData sagaData = new GrantingOfLoanData();
sagaData.setRequestId(id);
entityManager.persist(sagaData);
return sagaData;
}
}
并测试此 SagaManager 类:
@RunWith(SpringJUnit4ClassRunner.class)
@WebAppConfiguration
@ContextConfiguration(
classes = ConfigTest.class)
public class SagaTest {
@PersistenceContext
EntityManager entityManager;
private ApplicationContext applicationContext;
private GrantingOfLoanSagaManager sagaManager;
@Autowired
public void setApplicationContext(ApplicationContext applicationContext) {
this.applicationContext = applicationContext;
}
@Autowired
public void setSagaManager(GrantingOfLoanSagaManager sagaManager) {
this.sagaManager = sagaManager;
}
@Test
@Transactional
public void onCompleteEventsTriggered(){
Client client = new Client();
entityManager.persist(client);
invokeFromSagaManagerCreateNewSagaData_method(); //some code that invoke via spring createNewSagaData() method in SagaManager
}
}
但是后来我对这个 createNewSagaData() 方法遇到了一些问题,因为它使用 EntityManager 将对象保存在数据库中,自然地它应该从事务上下文运行以将 newSagaData 保存在数据库中,每个调用 createNewSagaData() 的方法都应该有 @事务注释并创建新事务。所以我发现它是不兼容的解决方案,我更改了 createNewSagaData 方法,如下所示:
@Transactional //Annotation was added
public GrantingOfLoanData createNewSagaData(AggregateId id ) {
GrantingOfLoanData sagaData = new GrantingOfLoanData();
sagaData.setRequestId(id);
entityManager.persist(sagaData);
return sagaData;
}
正如我所提到的,我认为我唯一需要的是创建一个新事务(可能使用propagation=REQUIRED_NEW)
但是之后,当我运行unitTests(/集成测试)时,我得到了以下异常:
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [org.finance.app.core.domain.businessprocess.loangrant.GrantingOfLoanSagaManager] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
所以我不知道如何解决它。我应该对调用 EntityManager 的每个外部方法使用 @Transactional 吗?
最佳答案
如果您将 Bean 名称用作像这样的限定符,则它们必须以小写字母开头:@Component("grantingOfLoanSagaManager")
,但如果没有必要,我不会使用限定符。 Autowire 按类型扫描正确的 bean。此外,您还应该使用 @Transactional
和 @TransactionConfiguration
关于java - 由于事务传播无法 Autowiring 组件,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/24150493/