java @Async 对我不起作用
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@Async not working for me
提问by Corin Fletcher
I am using @Scheduled and it have been working fine, but can't get the @Async working. I tested it many times, and seems that it is making my method asynchronous. Is there any other thing, configuration, or parameter I am missing? I have one class that has two methods one, the method marked with @Scheduled, executes and calls the second one which has been marked with @Async.
我正在使用 @Scheduled 并且它一直工作正常，但无法让 @Async 工作。我测试了很多次，似乎它使我的方法异步。我还缺少其他任何东西、配置或参数吗？我有一个类有两个方法，一个是用@Scheduled 标记的方法，执行并调用第二个用@Async 标记的方法。
Here is my config:
这是我的配置：
<!-- Scans within the base package of the application for @Components to configure as beans -->
<context:component-scan base-package="com.socialmeety" />
<context:annotation-config />
<tx:annotation-driven transaction-manager="transactionManager" />
<task:annotation-driven/>
<!-- Configures support for @Controllers -->
<mvc:annotation-driven />
<!-- Resolves view names to protected .jsp resources within the /WEB-INF/views directory -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/views/"/>
<property name="suffix" value=".jsp"/>
</bean>
<dwr:configuration />
<dwr:annotation-config />
<dwr:url-mapping />
<dwr:controller id="dwrController" debug="true" />
<bean class="org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter" />
Thanks.
谢谢。
回答by Corin Fletcher
As you're calling your @Async method from another method in the same object, you're probably bypassing the async proxy code and just calling your plain method, ie within the same thread.
当您从同一对象中的另一个方法调用 @Async 方法时，您可能会绕过异步代理代码而只是调用您的普通方法，即在同一线程中。
One way of solving this is by making sure your call to the @Async method is from another object. See comments at end of this article: http://groovyjavathoughts.blogspot.com/2010/01/asynchronous-code-with-spring-3-simple.html
解决此问题的一种方法是确保您对 @Async 方法的调用来自另一个对象。请参阅本文末尾的评论：http: //groovyjavathoughts.blogspot.com/2010/01/asynchronous-code-with-spring-3-simple.html
But it gets messy doing things like that, so you could just autowire the TaskScheduler, wrap up your method in a Runnable and execute it yourself.
但是做这样的事情会变得混乱，所以你可以自动装配 TaskScheduler，将你的方法包装在一个 Runnable 中并自己执行它。
回答by Kirk Backus
This is a complementary answer to the accepted one. You can call an async method in your own class, but you have to create a self-referential bean.
这是对已接受答案的补充答案。您可以在自己的类中调用异步方法，但必须创建一个自引用 bean。
The only side-effect here is that you cannotcall any async code inside the constructor. It is a nice way to keep your code all in the same place.
这里唯一的副作用是您不能在构造函数中调用任何异步代码。这是将代码保存在同一个地方的好方法。
@Autowired ApplicationContext appContext;
private MyAutowiredService self;
@PostConstruct
private void init() {
self = appContext.getBean(MyAutowiredService.class);
}
public void doService() {
//This will invoke the async proxy code
self.doAsync();
}
@Async
public void doAsync() {
//Async logic here...
}
回答by Salim Hamidi
I had a problem similar to this. And I spent a lot of time to fix it.
我遇到了类似的问题。我花了很多时间来修复它。
If you use spring-context 3.2, you also need to add @EnableAsyncon the class where you call the method service annotated @Async
如果使用spring-context 3.2，还需要在调用方法服务的类上添加@EnableAsync注释为@Async
Take a look at http://spring.io/guides/gs/async-method/#initial
看看http://spring.io/guides/gs/async-method/#initial
I hope that it'll help you.
我希望它会帮助你。
回答by Alireza Alallah
You can use @EnableAsyncin your service...
您可以@EnableAsync在您的服务中使用...
