在类和方法上定义@Transactional有什么区别 [英] What is the difference between defining @Transactional on class vs method
问题描述
@Transactional
public class UserServiceImpl implements UserService {
...................
public void method1(){
try{
method2();
}catch(Exception e){
}
}
public void method2(){
}
}
Case2
Case2
public class UserServiceImpl implements UserService {
...................
public void method1(){
try{
method2();
}catch(Exception e){
}
}
@Transactional
public void method2(){
}
}
在case1中，如果发生任何异常，则回滚正在运行，但在情况2中它是不工作如果我遵循case1会有任何性能问题吗？
In case1 if any exception occurs it rollback is working, but in case 2 it's not working. Is there any performance issues if I follow the case1?
推荐答案
@Transactional on class适用于服务上的每个方法。这是一条捷径。通常，如果您知道所有方法都将访问存储库层，则可以在服务类上设置 @Transactional（readonly = true）。然后，您可以使用 @Transactional 覆盖模型中执行更改的方法的行为。 1）和2）之间的性能问题未知。
@Transactionalon a class applies to each method on the service. It is a shortcut. Typically, you can set @Transactional(readonly = true) on a service class, if you know that all methods will access the repository layer. You can then override the behavior with @Transactional on methods performing changes in your model. Performance issues between 1) and 2) not known.
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