{"id":1433,"date":"2023-03-20T22:00:44","date_gmt":"2023-03-20T14:00:44","guid":{"rendered":"https:\/\/www.appblog.cn\/?p=1433"},"modified":"2023-04-28T21:01:12","modified_gmt":"2023-04-28T13:01:12","slug":"spring-boot-use-async-asynchronous-annotation-caused-the-bean-to-start-reporting-a-beancurrentlyincreationexception-exception-during-circular-dependency","status":"publish","type":"post","link":"https:\/\/www.appblog.cn\/index.php\/2023\/03\/20\/spring-boot-use-async-asynchronous-annotation-caused-the-bean-to-start-reporting-a-beancurrentlyincreationexception-exception-during-circular-dependency\/","title":{"rendered":"Spring Boot\u4f7f\u7528@Async\u5f02\u6b65\u6ce8\u89e3\u5bfc\u81f4\u8be5Bean\u5728\u5faa\u73af\u4f9d\u8d56\u65f6\u542f\u52a8\u62a5BeanCurrentlyInCreationException\u5f02\u5e38"},"content":{"rendered":"<h2>\u73b0\u8c61\u63cf\u8ff0<\/h2>\n<p>Spring Boot\u5de5\u7a0b\u4e2d\u4f7f\u7528<code>@Async<\/code>\u65f6\uff0c\u78b0\u5230\u5faa\u73af\u4f9d\u8d56\uff08circular reference\uff09\u95ee\u9898\uff1a<\/p>\n<pre><code>Caused by: org.springframework.beans.factory.BeanCurrentlyInCreationException: Error creating bean with name &#039;callbackService&#039;: Bean with name &#039;callbackService&#039; has been injected into other beans [payService] in its raw version as part of a circular reference, but has eventually been wrapped. This means that said other beans do not use the final version of the bean. This is often the result of over-eager type matching - consider using &#039;getBeanNamesOfType&#039; with the &#039;allowEagerInit&#039; flag turned off, for example.<\/code><\/pre>\n<p><!-- more --><\/p>\n<p>\u672c\u6587\u8f6c\u8f7d\u81f3\uff1a<a target=\"_blank\" rel=\"noopener\" href=\"https:\/\/blog.csdn.net\/f641385712\/article\/details\/92797058\">https:\/\/blog.csdn.net\/f641385712\/article\/details\/92797058<\/a><\/p>\n<p>\u51fa\u73b0\u4f7f\u7528<code>@Async<\/code>\u5bfc\u81f4\u5faa\u73af\u4f9d\u8d56\u95ee\u9898\u7684\u5fc5\u8981\u6761\u4ef6\uff1a<\/p>\n<ul>\n<li>\u5df2\u5f00\u542f<code>@EnableAsync<\/code>\u7684\u652f\u6301<\/li>\n<li><code>@Async<\/code>\u6ce8\u89e3\u6240\u5728\u7684Bean\u88ab\u5faa\u73af\u4f9d\u8d56<\/li>\n<\/ul>\n<p>\u7b80\u5355\u590d\u73b0\uff1a\u8c03\u7528\u672c\u7c7b\u7684\u5f02\u6b65\u65b9\u6cd5\uff08\u6807\u6ce8\u6709@Async\u6ce8\u89e3\uff09\uff0c\u4e3a\u4e86\u8ba9\u4e8e<code>@Async<\/code>\u751f\u6548\uff0c\u628a\u81ea\u5df1\u4f9d\u8d56\u8fdb\u6765\uff0c\u7136\u540e\u901a\u8fc7service\u63a5\u53e3\u6765\u8c03\u7528\uff0c\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n<pre><code class=\"language-java\">@Service\npublic class HelloServiceImpl implements HelloService {\n    @Autowired\n    private HelloService helloService;\n\n    @Override\n    public Object hello(Integer id) {\n        System.out.println(&quot;\u7ebf\u7a0b\u540d\u79f0\uff1a&quot; + Thread.currentThread().getName());\n        helloService.func(); \/\/ \u4f7f\u7528\u63a5\u53e3\u65b9\u5f0f\u8c03\u7528\uff0c\u800c\u4e0d\u662fthis\n        return &quot;service hello&quot;;\n    }\n\n    @Async\n    @Override\n    public void func() {\n        System.out.println(&quot;\u7ebf\u7a0b\u540d\u79f0\uff1a&quot; + Thread.currentThread().getName());\n    }\n}<\/code><\/pre>\n<p>\u6b64\u79cd\u505a\u6cd5\u9996\u5148\u662fSpring\u4e2d\u4e00\u4e2a\u5178\u578b\u7684\u5faa\u73af\u4f9d\u8d56\u573a\u666f\uff1a\u81ea\u5df1\u4f9d\u8d56\u81ea\u5df1\u3002\u672c\u4ee5\u4e3a\u80fd\u591f\u50cf\u89e3\u51b3\u4e8b\u52a1\u4e0d\u751f\u6548\u95ee\u9898\u4e00\u6837\u4f9d\u65e7\u5c61\u8bd5\u4e0d\u723d\uff0c\u4f46\u4e0e\u4e8b\u52a1\u4e0d\u540c\u7684\u662f\uff0c\u542f\u52a8\u5373\u62a5\u9519\uff1a<\/p>\n<pre><code>org.springframework.beans.factory.BeanCurrentlyInCreationException: Error creating bean with name &#039;helloServiceImpl&#039;: Bean with name &#039;helloServiceImpl&#039; has been injected into other beans [helloServiceImpl] in its raw version as part of a circular reference, but has eventually been wrapped. This means that said other beans do not use the final version of the bean. This is often the result of over-eager type matching - consider using &#039;getBeanNamesOfType&#039; with the &#039;allowEagerInit&#039; flag turned off, for example.\n    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:622)\n    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515)\n    at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320)\n    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)\n    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318)\n    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199)\n    ...<\/code><\/pre>\n<p>\u4f46\u662f\u5927\u5bb6\u53ef\u80fd\u4f1a\u95ee\u4f7f\u7528<code>@Async<\/code>\uff0c\u5373\u4f7f\u672c\u7c7b\u65b9\u6cd5\u8c03\u7528\u4e5f\u4ece\u6765\u6728\u6709\u9047\u5230\u8fd9\u4e2a\u9519\u8bef\u3002\u5176\u5b9e\u5e76\u4e0d\u662f\u4f7f\u7528<code>@Async<\/code>\u6ca1\u6709\u542f\u52a8\u62a5\u9519\uff0c\u800c\u662f\u672c\u7c7b\u8c03\u7528\u7684\u65f6\u5019\u76f4\u63a5\u8c03\u7528\u7684\u540c\u6b65\u65b9\u6cd5\uff0c\u8fd9\u6837<code>@Async<\/code>\u662f\u4e0d\u751f\u6548\u7684\uff0c\u4f46\u6211\u4eec\u5168\u7136\u4e0d\u77e5\u3002<\/p>\n<p>\u81f3\u4e8e<code>@Async<\/code>\u6ca1\u751f\u6548\u8fd9\u79cd\u95ee\u9898\u4e3a\u4f55\u6ca1\u6709\u663e\u73b0\uff0c\u5176\u5b9e\u9053\u7406\u5f88\u7b80\u5355\uff0c\u5b83\u548c\u4e8b\u52a1\u4e0d\u751f\u6548\u4e0d\u4e00\u6837\uff0c<code>@Async<\/code>\u82e5\u6ca1\u751f\u654899%\u60c5\u51b5\u4e0b\u90fd\u4e0d\u4f1a\u5f71\u54cd\u5230\u4e1a\u52a1\u7684\u6b63\u5e38\u8fdb\u884c\uff0c\u56e0\u4e3a\u5b83\u4e0d\u4f1a\u5f71\u54cd\u6570\u636e\u6b63\u786e\u6027\uff0c\u53ea\u4f1a\u5f71\u54cd\u5230\u6027\u80fd\uff08\u65e0\u975e\u5c31\u662f\u5f02\u6b65\u53d8\u540c\u6b65\u5457\uff0c\u8fd9\u662f\u517c\u5bb9\u7684\uff09\u3002<\/p>\n<h2>\u539f\u56e0\u5206\u6790<\/h2>\n<p>\u6211\u4eec\u77e5\u9053\u4e8b\u52a1\u4e0d\u751f\u6548\u548c<code>@Async<\/code>\u4e0d\u751f\u6548\u7684\u6839\u672c\u539f\u56e0\u90fd\u662f\u540c\u4e00\u4e2a\uff1a\u76f4\u63a5\u8c03\u7528\u4e86\u672c\u7c7b\u65b9\u6cd5\u800c\u975e\u63a5\u53e3\u65b9\u6cd5\/\u4ee3\u7406\u5bf9\u8c61\u65b9\u6cd5\u3002<\/p>\n<p>\u89e3\u51b3\u8fd9\u7c7b\u4e0d\u751f\u6548\u95ee\u9898\u7684\u65b9\u6848\u4e00\u822c\u6211\u4eec\u90fd\u6709\u4e24\u79cd\uff1a<\/p>\n<ul>\n<li>\u7406\u60f3\u7684\u8bbe\u8ba1\u5f53\u7136\u662f\u4e0d\u5efa\u8bae\u5faa\u73af\u4f9d\u8d56\uff0c\u4f46\u5728\u771f\u5b9e\u7684\u4e1a\u52a1\u5f00\u53d1\u4e2d\u5faa\u73af\u4f9d\u8d56\u662f100%\u907f\u514d\u4e0d\u4e86\u7684\uff0c\u540c\u6837\u672c\u7c7b\u65b9\u6cd5\u7684\u4e92\u8c03\u4e5f\u540c\u6837\u662f\u907f\u514d\u4e0d\u4e86\u7684<\/li>\n<li>\u81ea\u5df1\u6ce8\u5165\u81ea\u5df1\uff0c\u7136\u540e\u518d\u8c03\u7528\u63a5\u53e3\u65b9\u6cd5\uff08\u5f53\u7136\u6b64\u5904\u7684\u4e00\u4e2a\u53d8\u79cd\u662f\u4f7f\u7528\u7f16\u7a0b\u65b9\u5f0f\u5f62\u5982\uff1a<code>AInterface a = applicationContext.getBean(AInterface.class)<\/code>\u8fd9\u6837\u624b\u52a8\u83b7\u53d6\u4e5f\u662f\u53ef\u884c\u7684\uff09<\/li>\n<li>\u4f7f\u7528<code>AopContext.currentProxy()<\/code>\u65b9\u5f0f<\/li>\n<\/ul>\n<h3>\u81ea\u5df1\u4f9d\u8d56\u81ea\u5df1\u65b9\u6848\u5e26\u6765\u7684\u95ee\u9898\u5206\u6790<\/h3>\n<h4>\u95ee\u9898\u5b9a\u4f4d<\/h4>\n<p>\u6ce8\u610f\uff1a\u81ea\u5df1\u6ce8\u5165\u81ea\u5df1\u662f\u80fd\u591f\u5b8c\u7f8e\u89e3\u51b3\u4e8b\u52a1\u4e0d\u751f\u6548\u95ee\u9898\u3002\u5982\u9898\uff0c\u672c\u6587\u65e8\u5728\u8bb2\u89e3\u89e3\u51b3<code>@Async<\/code>\u7684\u95ee\u9898~~~<\/p>\n<p>\u81ea\u5df1\u4f9d\u8d56\u81ea\u5df1\u8fd9\u79cd\u65b9\u5f0f\u662f\u4e00\u79cd\u5178\u578b\u7684\u4f7f\u7528\u5faa\u73af\u4f9d\u8d56\u65b9\u5f0f\u6765\u89e3\u51b3\u95ee\u9898\uff0c\u5927\u591a\u6570\u60c5\u51b5\u4e0b\u5b83\u662f\u4e00\u4e2a\u975e\u5e38\u597d\u7684\u89e3\u51b3\u65b9\u6848\u3002<\/p>\n<p>\u6bd4\u5982\u672c\u4f8b\u82e5\u8981\u89e3\u51b3<code>@Async<\/code>\u672c\u7c7b\u8c03\u7528\u95ee\u9898\uff0c\u6211\u4eec\u7684\u4ee3\u7801\u4f1a\u8fd9\u4e48\u6765\u5199\uff1a<\/p>\n<pre><code class=\"language-java\">@Service\npublic class HelloServiceImpl implements HelloService {\n\n    @Autowired\n    private HelloService helloService;\n\n    @Transactional\n    @Override\n    public Object hello(Integer id) {\n        System.out.println(&quot;\u7ebf\u7a0b\u540d\u79f0\uff1a&quot; + Thread.currentThread().getName());\n        \/\/ func(); \/\/ \u8fd9\u6837\u4e66\u5199@Async\u80af\u5b9a\u4e0d\u751f\u6548~\n        helloService.func(); \/\/\u8c03\u7528\u63a5\u53e3\u65b9\u6cd5\n        return &quot;service hello&quot;;\n    }\n\n    @Async\n    @Override\n    public void func() {\n        System.out.println(&quot;\u7ebf\u7a0b\u540d\u79f0\uff1a&quot; + Thread.currentThread().getName());\n    }\n}<\/code><\/pre>\n<p>\u672c\u4ee5\u4e3a\u50cf\u89e3\u51b3\u4e8b\u52a1\u95ee\u9898\u4e00\u6837\uff0c\u50cf\u8fd9\u6837\u5199\u662f\u80af\u5b9a\u5b8c\u7f8e\u89e3\u51b3\u95ee\u9898\u7684\u3002\u4f46\u5948\u4f55\u5e26\u6765\u4e86\u65b0\u95ee\u9898\uff0c\u542f\u52a8\u5373\u62a5\u9519\uff0c\u62a5\u9519\u4fe1\u606f\u5982\u4e0a\u4e00\u81f4<\/p>\n<p>\u4ece\u62a5\u9519\u4fe1\u606f\u7684\u63cf\u8ff0\u53ef\u4ee5\u770b\u51fa\uff0c\u6839\u672c\u539f\u56e0\u662fhelloServiceImpl\u6700\u7ec8\u88ab\u5305\u88c5(\u4ee3\u7406)\uff0c\u6240\u4ee5\u88ab\u4f7f\u7528\u7684Bean\u5e76\u4e0d\u662f\u6700\u7ec8\u7684\u7248\u672c\uff0c\u6240\u4ee5Spring\u7684\u81ea\u68c0\u673a\u5236\u62a5\u9519\u4e86~~~<\/p>\n<blockquote>\n<p>\u8bf4\u660e\uff1aSpring\u7ba1\u7406\u7684Bean\u90fd\u662f\u5355\u4f8b\u7684\uff0c\u6240\u4ee5Spring\u9ed8\u8ba4\u9700\u8981\u4fdd\u8bc1\u6240\u6709\u4f7f\u7528\u6b64Bean\u7684\u5730\u65b9\u90fd\u6307\u5411\u7684\u662f\u540c\u4e00\u4e2a\u5730\u5740\uff0c\u4e5f\u5c31\u662f\u6700\u7ec8\u7248\u672c\u7684Bean\uff0cSpring\u4e5f\u63d0\u4f9b\u4e86\u8fd9\u6837\u7684\u81ea\u68c0\u673a\u5236~<\/p>\n<\/blockquote>\n<p>\u4e3a\u4e86\u66f4\u597d\u7684\u8bf4\u660e\u95ee\u9898\uff0c\u6b64\u5904\u4e0d\u7528\u81ea\u5df1\u4f9d\u8d56\u81ea\u5df1\u6765\u8868\u8ff0\uff08\u56e0\u4e3a\u540d\u5b57\u76f8\u540c\u5bb9\u6613\u6df7\u6dc6\u4e0d\u65b9\u4fbf\u8bf4\u660e\u95ee\u9898\uff09\uff0c\u800c\u4ee5\u4e0b\u9762A\u3001B\u4e24\u4e2a\u7c7b\u7684\u5f62\u5f0f\u8bf4\u660e\uff1a<\/p>\n<pre><code class=\"language-java\">@Service\npublic class A implements AInterface {\n    @Autowired\n    private BInterface b;\n\n    @Async\n    @Override\n    public void funA() {\n    }\n}\n\n@Service\npublic class B implements BInterface {\n    @Autowired\n    private AInterface a;\n\n    @Override\n    public void funB() {\n        a.funA();\n    }\n}<\/code><\/pre>\n<p>\u5982\u4e0a\u793a\u4f8b\u4ee3\u7801\u542f\u52a8\u65f6\u4f1a\u62a5\u9519\uff1a\uff08\u793a\u4f8b\u4ee3\u7801\u6a21\u4eff\u6210\u529f\uff09<\/p>\n<pre><code class=\"language-java\">org.springframework.beans.factory.BeanCurrentlyInCreationException: Error creating bean with name &#039;a&#039;: Bean with name &#039;a&#039; has been injected into other beans [b] in its raw version as part of a circular reference, but has eventually been wrapped. This means that said other beans do not use the final version of the bean. This is often the result of over-eager type matching - consider using &#039;getBeanNamesOfType&#039; with the &#039;allowEagerInit&#039; flag turned off, for example.\n    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:622)\n    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515)\n    at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320)\n    ...<\/code><\/pre>\n<p>\u4e0b\u9762\u662f\u91cd\u70b9\uff0c\u6765\u8ddf\u8e2a\u4e00\u4e0b\u6e90\u7801\uff0c\u5b9a\u4f4d\u6b64\u95ee\u9898\uff1a<\/p>\n<pre><code class=\"language-java\">protected Object doCreateBean( ... ){\n    ...\n    boolean earlySingletonExposure = (mbd.isSingleton() &amp;&amp; this.allowCircularReferences &amp;&amp; isSingletonCurrentlyInCreation(beanName));\n    if (earlySingletonExposure) {\n        addSingletonFactory(beanName, () -&gt; getEarlyBeanReference(beanName, mbd, bean));\n    }\n    ...\n\n    \/\/ populateBean\u8fd9\u4e00\u53e5\u7279\u522b\u7684\u5173\u952e\uff0c\u5b83\u9700\u8981\u7ed9A\u7684\u5c5e\u6027\u8d4b\u503c\uff0c\u6240\u4ee5\u6b64\u5904\u4f1a\u53bb\u5b9e\u4f8b\u5316B~~\n    \/\/ \u800cB\u6211\u4eec\u4ece\u4e0a\u53ef\u4ee5\u770b\u5230\u5b83\u5c31\u662f\u4e2a\u666e\u901a\u7684Bean\uff08\u5e76\u4e0d\u9700\u8981\u521b\u5efa\u4ee3\u7406\u5bf9\u8c61\uff09\uff0c\u5b9e\u4f8b\u5316\u5b8c\u6210\u4e4b\u540e\uff0c\u7ee7\u7eed\u7ed9\u4ed6\u7684\u5c5e\u6027A\u8d4b\u503c\uff0c\u800c\u6b64\u65f6\u5b83\u4f1a\u53bb\u62ff\u5230A\u7684\u65e9\u671f\u5f15\u7528\n    \/\/ \u4e5f\u5c31\u5728\u6b64\u5904\u5728\u7ed9B\u7684\u5c5e\u6027a\u8d4b\u503c\u7684\u65f6\u5019\uff0c\u4f1a\u6267\u884c\u5230\u4e0a\u9762\u653e\u8fdb\u53bb\u7684Bean A\u6d41\u7a0b\u4e2d\u7684getEarlyBeanReference()\u65b9\u6cd5  \u4ece\u800c\u62ff\u5230A\u7684\u65e9\u671f\u5f15\u7528~~\n    \/\/ \u6267\u884cA\u7684getEarlyBeanReference()\u65b9\u6cd5\u7684\u65f6\u5019\uff0c\u4f1a\u6267\u884c\u81ea\u52a8\u4ee3\u7406\u521b\u5efa\u5668\uff0c\u4f46\u662f\u7531\u4e8eA\u6ca1\u6709\u6807\u6ce8\u4e8b\u52a1\uff0c\u6240\u4ee5\u6700\u7ec8\u4e0d\u4f1a\u521b\u5efa\u4ee3\u7406\uff0cso B\u5408\u683c\u5c5e\u6027\u5f15\u7528\u4f1a\u662fA\u7684**\u539f\u59cb\u5bf9\u8c61**\n    \/\/ \u9700\u8981\u6ce8\u610f\u7684\u662f\uff1a@Async\u7684\u4ee3\u7406\u5bf9\u8c61\u4e0d\u662f\u5728getEarlyBeanReference()\u4e2d\u521b\u5efa\u7684\uff0c\u662f\u5728postProcessAfterInitialization\u521b\u5efa\u7684\u4ee3\u7406\n    \/\/ \u4ece\u8fd9\u6211\u4eec\u4e5f\u53ef\u4ee5\u770b\u51fa@Async\u7684\u4ee3\u7406\u5b83\u9ed8\u8ba4\u5e76\u4e0d\u652f\u6301\u4f60\u53bb\u5faa\u73af\u5f15\u7528\uff0c\u56e0\u4e3a\u5b83\u5e76\u6ca1\u6709\u628a\u4ee3\u7406\u5bf9\u8c61\u7684\u65e9\u671f\u5f15\u7528\u63d0\u4f9b\u51fa\u6765~~~\uff08\u6ce8\u610f\u8fd9\u70b9\u548c\u81ea\u52a8\u4ee3\u7406\u521b\u5efa\u5668\u7684\u533a\u522b~\uff09\n\n    \/\/ \u7ed3\u8bba\uff1a\u6b64\u5904\u7ed9A\u7684\u4f9d\u8d56\u5c5e\u6027\u5b57\u6bb5B\u8d4b\u503c\u4e3a\u4e86B\u7684\u5b9e\u4f8b(\u56e0\u4e3aB\u4e0d\u9700\u8981\u521b\u5efa\u4ee3\u7406\uff0c\u6240\u4ee5\u5c31\u662f\u539f\u59cb\u5bf9\u8c61)\n    \/\/ \u800c\u6b64\u5904\u5b9e\u4f8bB\u91cc\u9762\u4f9d\u8d56\u7684A\u6ce8\u5165\u7684\u4ecd\u65e7\u4e3aBean A\u7684\u666e\u901a\u5b9e\u4f8b\u5bf9\u8c61\uff08\u6ce8\u610f  \u662f\u539f\u59cb\u5bf9\u8c61\u975e\u4ee3\u7406\u5bf9\u8c61\uff09  \u6ce8\uff1a\u6b64\u65f6exposedObject\u4e5f\u4f9d\u65e7\u4e3a\u539f\u59cb\u5bf9\u8c61\n    populateBean(beanName, mbd, instanceWrapper);\n\n    \/\/ \u6807\u6ce8\u6709@Async\u7684Bean\u7684\u4ee3\u7406\u5bf9\u8c61\u5728\u6b64\u5904\u4f1a\u88ab\u751f\u6210~~~ \u53c2\u7167\u7c7b\uff1aAsyncAnnotationBeanPostProcessor\n    \/\/ \u6240\u4ee5\u6b64\u53e5\u6267\u884c\u5b8c\u6210\u540e  exposedObject\u5c31\u4f1a\u662f\u4e2a\u4ee3\u7406\u5bf9\u8c61\u800c\u975e\u539f\u59cb\u5bf9\u8c61\u4e86\n    exposedObject = initializeBean(beanName, exposedObject, mbd);\n\n    ...\n    \/\/ \u8fd9\u91cc\u662f\u62a5\u9519\u7684\u91cd\u70b9~~~\n    if (earlySingletonExposure) {\n        \/\/ \u4e0a\u9762\u8bf4\u4e86A\u88abB\u5faa\u73af\u4f9d\u8d56\u8fdb\u53bb\u4e86\uff0c\u6240\u4ee5\u6b64\u65f6A\u662f\u88ab\u653e\u8fdb\u4e86\u4e8c\u7ea7\u7f13\u5b58\u7684\uff0c\u6240\u4ee5\u6b64\u5904earlySingletonReference \u662fA\u7684\u539f\u59cb\u5bf9\u8c61\u7684\u5f15\u7528\n        \/\/ \uff08\u8fd9\u4e5f\u5c31\u89e3\u91ca\u4e86\u4e3a\u4f55\u6211\u8bf4\uff1a\u5982\u679cA\u6ca1\u6709\u88ab\u5faa\u73af\u4f9d\u8d56\uff0c\u662f\u4e0d\u4f1a\u62a5\u9519\u4e0d\u4f1a\u6709\u95ee\u9898\u7684   \u56e0\u4e3a\u82e5\u6ca1\u6709\u5faa\u73af\u4f9d\u8d56earlySingletonReference = null\u540e\u9762\u5c31\u76f4\u63a5return\u4e86\uff09\n        Object earlySingletonReference = getSingleton(beanName, false);\n        if (earlySingletonReference != null) {\n            \/\/ \u4e0a\u9762\u5206\u6790\u4e86exposedObject \u662f\u88ab@Aysnc\u4ee3\u7406\u8fc7\u7684\u5bf9\u8c61\uff0c \u800cbean\u662f\u539f\u59cb\u5bf9\u8c61 \u6240\u4ee5\u6b64\u5904\u4e0d\u76f8\u7b49  \u8d70else\u903b\u8f91\n            if (exposedObject == bean) {\n                exposedObject = earlySingletonReference;\n            }\n            \/\/ allowRawInjectionDespiteWrapping \u6807\u6ce8\u662f\u5426\u5141\u8bb8\u6b64Bean\u7684\u539f\u59cb\u7c7b\u578b\u88ab\u6ce8\u5165\u5230\u5176\u5b83Bean\u91cc\u9762\uff0c\u5373\u4f7f\u81ea\u5df1\u6700\u7ec8\u4f1a\u88ab\u5305\u88c5\uff08\u4ee3\u7406\uff09\n            \/\/ \u9ed8\u8ba4\u662ffalse\u8868\u793a\u4e0d\u5141\u8bb8\uff0c\u5982\u679c\u6539\u4e3atrue\u8868\u793a\u5141\u8bb8\uff0c\u5c31\u4e0d\u4f1a\u62a5\u9519\u5566\u3002\u8fd9\u662f\u6211\u4eec\u540e\u9762\u8bb2\u7684\u51b3\u65b9\u6848\u7684\u5176\u4e2d\u4e00\u4e2a\u65b9\u6848~~~\n            \/\/ \u53e6\u5916dependentBeanMap\u8bb0\u5f55\u7740\u6bcf\u4e2aBean\u5b83\u6240\u4f9d\u8d56\u7684Bean\u7684Map~~~~\n            else if (!this.allowRawInjectionDespiteWrapping &amp;&amp; hasDependentBean(beanName)) {\n                \/\/ \u6211\u4eec\u7684Bean A\u4f9d\u8d56\u4e8eB\uff0cso\u6b64\u5904\u503c\u4e3a[&quot;b&quot;]\n                String[] dependentBeans = getDependentBeans(beanName);\n                Set&lt;String&gt; actualDependentBeans = new LinkedHashSet&lt;&gt;(dependentBeans.length);\n\n                \/\/ \u5bf9\u6240\u6709\u7684\u4f9d\u8d56\u8fdb\u884c\u4e00\u4e00\u68c0\u67e5~    \u6bd4\u5982\u6b64\u5904B\u5c31\u4f1a\u6709\u95ee\u9898\n                \/\/ \u201cb\u201d\u5b83\u7ecf\u8fc7removeSingletonIfCreatedForTypeCheckOnly\u6700\u7ec8\u8fd4\u8fd4\u56defalse  \u56e0\u4e3aalreadyCreated\u91cc\u9762\u5df2\u7ecf\u6709\u5b83\u4e86\u8868\u793aB\u5df2\u7ecf\u5b8c\u5168\u521b\u5efa\u5b8c\u6210\u4e86~~~\n                \/\/ \u800cb\u90fd\u5b8c\u6210\u4e86\uff0c\u6240\u4ee5\u5c5e\u6027a\u4e5f\u8d4b\u503c\u5b8c\u6210\u513f\u804a \u4f46\u662fB\u91cc\u9762\u5f15\u7528\u7684a\u548c\u4e3b\u6d41\u7a0b\u6211\u8fd9\u4e2aA\u7adf\u7136\u4e0d\u76f8\u7b49\uff0c\u90a3\u80af\u5b9a\u5c31\u6709\u95ee\u9898(\u8bf4\u660e\u4e0d\u662f\u6700\u7ec8\u7684)~~~\n                \/\/ so\u6700\u7ec8\u4f1a\u88ab\u52a0\u5165\u5230actualDependentBeans\u91cc\u9762\u53bb\uff0c\u8868\u793aA\u771f\u6b63\u7684\u4f9d\u8d56~~~\n                for (String dependentBean : dependentBeans) {\n                    if (!removeSingletonIfCreatedForTypeCheckOnly(dependentBean)) {\n                        actualDependentBeans.add(dependentBean);\n                    }\n                }\n\n                \/\/ \u82e5\u5b58\u5728\u8fd9\u79cd\u771f\u6b63\u7684\u4f9d\u8d56\uff0c\u90a3\u5c31\u62a5\u9519\u4e86~~~  \u5219\u4e2a\u5f02\u5e38\u5c31\u662f\u4e0a\u9762\u770b\u5230\u7684\u5f02\u5e38\u4fe1\u606f\n                if (!actualDependentBeans.isEmpty()) {\n                    throw new BeanCurrentlyInCreationException(beanName,\n                            &quot;Bean with name &#039;&quot; + beanName + &quot;&#039; has been injected into other beans [&quot; +\n                            StringUtils.collectionToCommaDelimitedString(actualDependentBeans) +\n                            &quot;] in its raw version as part of a circular reference, but has eventually been &quot; +\n                            &quot;wrapped. This means that said other beans do not use the final version of the &quot; +\n                            &quot;bean. This is often the result of over-eager type matching - consider using &quot; +\n                            &quot;&#039;getBeanNamesOfType&#039; with the &#039;allowEagerInit&#039; flag turned off, for example.&quot;);\n                }\n            }\n        }\n    }\n    ...\n}<\/code><\/pre>\n<p>\u8fd9\u91cc\u77e5\u8bc6\u70b9\u907f\u5f00\u4e0d<code>@Aysnc<\/code>\u6ce8\u89e3\u6807\u6ce8\u7684Bean\u7684\u521b\u5efa\u4ee3\u7406\u7684\u65f6\u673a\u3002<code>@EnableAsync<\/code>\u5f00\u542f\u65f6\u5b83\u4f1a\u5411\u5bb9\u5668\u5185\u6ce8\u5165<code>AsyncAnnotationBeanPostProcessor<\/code>\uff0c\u5b83\u662f\u4e00\u4e2a<code>BeanPostProcessor<\/code>\uff0c\u5b9e\u73b0\u4e86<code>postProcessAfterInitialization<\/code>\u65b9\u6cd5\u3002\u6b64\u5904\u6211\u4eec\u770b\u4ee3\u7801\uff0c\u521b\u5efa\u4ee3\u7406\u7684\u52a8\u4f5c\u5728\u62bd\u8c61\u7236\u7c7b<code>AbstractAdvisingBeanPostProcessor<\/code>\u4e0a\uff1a<\/p>\n<pre><code class=\"language-java\">\/\/ @since 3.2   \u6ce8\u610f\uff1a@EnableAsync\u5728Spring3.1\u540e\u51fa\u73b0\n\/\/ \u7ee7\u627f\u81eaProxyProcessorSupport\uff0c\u6240\u4ee5\u5177\u6709\u52a8\u6001\u4ee3\u7406\u76f8\u5173\u5c5e\u6027~ \u65b9\u4fbf\u521b\u5efa\u4ee3\u7406\u5bf9\u8c61\npublic abstract class AbstractAdvisingBeanPostProcessor extends ProxyProcessorSupport implements BeanPostProcessor {\n\n    \/\/ \u8fd9\u91cc\u4f1a\u7f13\u5b58\u6240\u6709\u88ab\u5904\u7406\u7684Bean~~~  eligible\uff1a\u5408\u9002\u7684\n    private final Map&lt;Class&lt;?&gt;, Boolean&gt; eligibleBeans = new ConcurrentHashMap&lt;&gt;(256);\n\n    \/\/postProcessBeforeInitialization\u65b9\u6cd5\u4ec0\u4e48\u4e0d\u505a~\n    @Override\n    public Object postProcessBeforeInitialization(Object bean, String beanName) {\n        return bean;\n    }\n\n    \/\/ \u5173\u952e\u662f\u8fd9\u91cc\u3002\u5f53Bean\u521d\u59cb\u5316\u5b8c\u6210\u540e\u8fd9\u91cc\u4f1a\u6267\u884c\uff0c\u8fd9\u91cc\u4f1a\u51b3\u7b56\u770b\u770b\u8981\u4e0d\u8981\u5bf9\u6b64Bean\u521b\u5efa\u4ee3\u7406\u5bf9\u8c61\u518d\u8fd4\u56de~~~\n    @Override\n    public Object postProcessAfterInitialization(Object bean, String beanName) {\n        if (this.advisor == null || bean instanceof AopInfrastructureBean) {\n            \/\/ Ignore AOP infrastructure such as scoped proxies.\n            return bean;\n        }\n\n        \/\/ \u5982\u679c\u6b64Bean\u5df2\u7ecf\u88ab\u4ee3\u7406\u4e86\uff08\u6bd4\u5982\u5df2\u7ecf\u88ab\u4e8b\u52a1\u90a3\u8fb9\u7ed9\u4ee3\u7406\u4e86~~\uff09\n        if (bean instanceof Advised) {\n            Advised advised = (Advised) bean;\n\n            \/\/ \u6b64\u5904\u62ff\u7684\u662fAopUtils.getTargetClass(bean)\u76ee\u6807\u5bf9\u8c61\uff0c\u505a\u6700\u7ec8\u7684\u5224\u65ad\n            \/\/ isEligible()\u662f\u5426\u5408\u9002\u7684\u5224\u65ad\u65b9\u6cd5  \u662f\u672c\u6587\u6700\u91cd\u8981\u7684\u4e00\u4e2a\u65b9\u6cd5\uff0c\u4e0b\u6587\u89e3\u91ca~\n            \/\/ \u6b64\u5904\u8fd8\u6709\u4e2a\u5c0f\u7ec6\u8282\uff1aisFrozen\u4e3afalse\u4e5f\u5c31\u662f\u8fd8\u6ca1\u88ab\u51bb\u7ed3\u7684\u65f6\u5019\uff0c\u5c31\u53ea\u5411\u91cc\u9762\u6dfb\u52a0\u4e00\u4e2a\u5207\u9762\u63a5\u53e3   \u5e76\u4e0d\u8981\u81ea\u5df1\u518d\u521b\u5efa\u4ee3\u7406\u5bf9\u8c61\u4e86  \u7701\u4e8b\n            if (!advised.isFrozen() &amp;&amp; isEligible(AopUtils.getTargetClass(bean))) {\n                \/\/ Add our local Advisor to the existing proxy&#039;s Advisor chain...\n                \/\/ beforeExistingAdvisors\u51b3\u5b9a\u8fd9\u8be5advisor\u6700\u5148\u6267\u884c\u8fd8\u662f\u6700\u540e\u6267\u884c\n                \/\/ \u6b64\u5904\u7684advisor\u4e3a\uff1aAsyncAnnotationAdvisor  \u5b83\u5207\u5165Class\u548cMethod\u6807\u6ce8\u6709@Aysnc\u6ce8\u89e3\u7684\u5730\u65b9~~~\n                if (this.beforeExistingAdvisors) {\n                    advised.addAdvisor(0, this.advisor);\n                } else {\n                    advised.addAdvisor(this.advisor);\n                }\n                return bean;\n            }\n        }\n\n        \/\/ \u82e5\u4e0d\u662f\u4ee3\u7406\u5bf9\u8c61\uff0c\u6b64\u5904\u5c31\u8981\u4e0b\u624b\u4e86~~~~isEligible() \u8fd9\u4e2a\u65b9\u6cd5\u7279\u522b\u91cd\u8981\n        if (isEligible(bean, beanName)) {\n            \/\/ copy\u5c5e\u6027  proxyFactory.copyFrom(this); \u751f\u6210\u4e00\u4e2a\u65b0\u7684ProxyFactory \n            ProxyFactory proxyFactory = prepareProxyFactory(bean, beanName);\n            \/\/ \u5982\u679c\u6ca1\u6709\u5f3a\u5236\u91c7\u7528CGLIB \u53bb\u63a2\u6d4b\u5b83\u7684\u63a5\u53e3~\n            if (!proxyFactory.isProxyTargetClass()) {\n                evaluateProxyInterfaces(bean.getClass(), proxyFactory);\n            }\n            \/\/ \u6dfb\u52a0\u8fdb\u6b64\u5207\u9762~~ \u6700\u7ec8\u4e3a\u5b83\u521b\u5efa\u4e00\u4e2agetProxy \u4ee3\u7406\u5bf9\u8c61\n            proxyFactory.addAdvisor(this.advisor);\n            \/\/customize\u4ea4\u7ed9\u5b50\u7c7b\u590d\u5199\uff08\u5b9e\u9645\u5b50\u7c7b\u76ee\u524d\u90fd\u6ca1\u6709\u590d\u5199~\uff09\n            customizeProxyFactory(proxyFactory);\n            return proxyFactory.getProxy(getProxyClassLoader());\n        }\n\n        \/\/ No proxy needed.\n        return bean;\n    }\n\n    \/\/ \u6211\u4eec\u53d1\u73b0BeanName\u6700\u7ec8\u5176\u5b9e\u662f\u6ca1\u6709\u7528\u5230\u7684~~~\n    \/\/ \u4f46\u662f\u5b50\u7c7bAbstractBeanFactoryAwareAdvisingPostProcessor\u662f\u7528\u5230\u4e86\u7684  \u6ca1\u6709\u505a\u4ec0\u4e48 \u53ef\u4ee5\u5ffd\u7565~~~\n    protected boolean isEligible(Object bean, String beanName) {\n        return isEligible(bean.getClass());\n    }\n    protected boolean isEligible(Class&lt;?&gt; targetClass) {\n        \/\/ \u9996\u6b21\u8fdb\u6765eligible\u7684\u503c\u80af\u5b9a\u4e3anull~~~\n        Boolean eligible = this.eligibleBeans.get(targetClass);\n        if (eligible != null) {\n            return eligible;\n        }\n        \/\/ \u5982\u679c\u6839\u672c\u5c31\u6ca1\u6709\u914d\u7f6eadvisor  \u4e5f\u5c31\u4e0d\u7528\u770b\u4e86~\n        if (this.advisor == null) {\n            return false;\n        }\n\n        \/\/ \u6700\u5173\u952e\u7684\u5c31\u662fcanApply\u8fd9\u4e2a\u65b9\u6cd5\uff0c\u5982\u679cAsyncAnnotationAdvisor  \u80fd\u5207\u8fdb\u5b83  \u90a3\u8fd9\u91cc\u5c31\u662ftrue\n        \/\/ \u672c\u4f8b\u4e2d\u65b9\u6cd5\u6807\u6ce8\u6709@Aysnc\u6ce8\u89e3\uff0c\u6240\u4ee5\u94c1\u5b9a\u662f\u80fd\u88ab\u5207\u5165\u7684  \u8fd4\u56detrue\u7ee7\u7eed\u4e0a\u9762\u65b9\u6cd5\u4f53\u7684\u5185\u5bb9\n        eligible = AopUtils.canApply(this.advisor, targetClass);\n        this.eligibleBeans.put(targetClass, eligible);\n        return eligible;\n    }\n    ...\n}<\/code><\/pre>\n<p>\u7ecf\u6b64\u4e00\u5f79\uff0c\u6839\u672c\u539f\u7406\u662f\u53ea\u8981\u80fd\u88ab\u5207\u9762<code>AsyncAnnotationAdvisor<\/code>\u5207\u5165\uff08\u5373\u53ea\u9700\u8981\u7c7b\/\u65b9\u6cd5\u6709\u6807\u6ce8<code>@Async<\/code>\u6ce8\u89e3\u5373\u53ef\uff09\u7684Bean\u6700\u7ec8\u90fd\u4f1a\u751f\u6210\u4e00\u4e2a\u4ee3\u7406\u5bf9\u8c61\uff08\u82e5\u5df2\u7ecf\u662f\u4ee3\u7406\u5bf9\u8c61\u91cc\uff0c\u53ea\u9700\u8981\u52a0\u5165\u8be5\u5207\u9762\u5373\u53ef\uff09\u8d4b\u503c\u7ed9\u4e0a\u9762\u7684<code>exposedObject<\/code>\u4f5c\u4e3a\u8fd4\u56de\u6700\u7ec8add\u8fdbSpring\u5bb9\u5668\u5185~<\/p>\n<p>\u9488\u5bf9\u4e0a\u9762\u7684\u6b65\u9aa4\uff0c\u4e3a\u4e86\u8f85\u52a9\u7406\u89e3\uff0c\u6211\u5c1d\u8bd5\u603b\u7ed3\u6587\u5b57\u63cf\u8ff0\u5982\u4e0b\uff1a<\/p>\n<ol>\n<li><code>context.getBean(A)<\/code>\u5f00\u59cb\u521b\u5efaA\uff0cA\u5b9e\u4f8b\u5316\u5b8c\u6210\u540e\u7ed9A\u7684\u4f9d\u8d56\u5c5e\u6027b\u5f00\u59cb\u8d4b\u503c~<\/li>\n<li><code>context.getBean(B)<\/code>\u5f00\u59cb\u521b\u5efaB\uff0cB\u5b9e\u4f8b\u5316\u5b8c\u6210\u540e\u7ed9B\u7684\u4f9d\u8d56\u5c5e\u6027a\u5f00\u59cb\u8d4b\u503c~<\/li>\n<li>\u91cd\u70b9\uff1a\u6b64\u65f6\u56e0\u4e3aA\u652f\u6301\u5faa\u73af\u4f9d\u8d56\uff0c\u6240\u4ee5\u4f1a\u6267\u884cA\u7684<code>getEarlyBeanReference<\/code>\u65b9\u6cd5\u5f97\u5230\u5b83\u7684\u65e9\u671f\u5f15\u7528\u3002\u800c\u6267\u884c<code>getEarlyBeanReference()<\/code>\u7684\u65f6\u5019\u56e0\u4e3a<code>@Async<\/code>\u6839\u672c\u8fd8\u6ca1\u6267\u884c\uff0c\u6240\u4ee5\u6700\u7ec8\u8fd4\u56de\u7684\u4ecd\u65e7\u662f\u539f\u59cb\u5bf9\u8c61\u7684\u5730\u5740<\/li>\n<li>B\u5b8c\u6210\u521d\u59cb\u5316\u3001\u5b8c\u6210\u5c5e\u6027\u7684\u8d4b\u503c\uff0c\u6b64\u65f6\u5c5e\u6027field\u6301\u6709\u7684\u662fBean A\u539f\u59cb\u7c7b\u578b\u7684\u5f15\u7528~<\/li>\n<li>\u5b8c\u6210\u4e86A\u7684\u5c5e\u6027\u7684\u8d4b\u503c\uff08\u6b64\u65f6\u5df2\u6301\u6709B\u7684\u5b9e\u4f8b\u7684\u5f15\u7528\uff09\uff0c\u7ee7\u7eed\u6267\u884c\u521d\u59cb\u5316\u65b9\u6cd5<code>initializeBean(...)<\/code>\uff0c\u5728\u6b64\u5904\u4f1a\u89e3\u6790<code>@Aysnc<\/code>\u6ce8\u89e3\uff0c\u4ece\u800c\u751f\u6210\u4e00\u4e2a\u4ee3\u7406\u5bf9\u8c61\uff0c\u6240\u4ee5\u6700\u7ec8<code>exposedObject<\/code>\u662f\u4e00\u4e2a\u4ee3\u7406\u5bf9\u8c61\uff08\u800c\u975e\u539f\u59cb\u5bf9\u8c61\uff09\u6700\u7ec8\u52a0\u5165\u5230\u5bb9\u5668\u91cc~<\/li>\n<li>\u5c34\u5c2c\u573a\u9762\u51fa\u73b0\uff1aB\u5f15\u7528\u7684\u5c5e\u6027A\u662f\u4e2a\u539f\u59cb\u5bf9\u8c61\uff0c\u800c\u6b64\u5904\u51c6\u5907return\u7684\u5b9e\u4f8bA\u7adf\u7136\u662f\u4e2a\u4ee3\u7406\u5bf9\u8c61\uff0c\u4e5f\u5c31\u662f\u8bf4B\u5f15\u7528\u7684\u5e76\u975e\u662f\u6700\u7ec8\u5bf9\u8c61\uff08\u4e0d\u662f\u6700\u7ec8\u653e\u8fdb\u5bb9\u5668\u91cc\u7684\u5bf9\u8c61\uff09<\/li>\n<li>\u6267\u884c\u81ea\u68c0\u7a0b\u5e8f\uff1a\u7531\u4e8e<code>allowRawInjectionDespiteWrapping<\/code>\u9ed8\u8ba4\u503c\u662ffalse\uff0c\u8868\u793a\u4e0d\u5141\u8bb8\u4e0a\u9762\u4e0d\u4e00\u81f4\u7684\u60c5\u51b5\u53d1\u751f\uff0cso\u6700\u7ec8\u5c31\u629b\u9519\u4e86~<\/li>\n<\/ol>\n<h4>\u89e3\u51b3\u65b9\u6848<\/h4>\n<p>\u901a\u8fc7\u4e0a\u9762\u5206\u6790\uff0c\u77e5\u9053\u4e86\u95ee\u9898\u7684\u6839\u672c\u539f\u56e0\uff0c\u73b0\u603b\u7ed3\u51fa\u89e3\u51b3\u4e0a\u8ff0\u65b0\u95ee\u9898\u7684\u89e3\u51b3\u65b9\u6848\uff0c\u53ef\u5206\u4e3a\u4e0b\u9762\u4e09\u79cd\u65b9\u6848\uff1a<\/p>\n<ul>\n<li>\u628a<code>allowRawInjectionDespiteWrapping<\/code>\u8bbe\u7f6e\u4e3atrue<\/li>\n<li>\u4f7f\u7528<code>@Lazy<\/code>\u6216\u8005<code>@ComponentScan(lazyInit = true)<\/code>\u89e3\u51b3<\/li>\n<li>\u4e0d\u8981\u8ba9<code>@Async<\/code>\u7684Bean\u53c2\u4e0e\u5faa\u73af\u4f9d\u8d56<\/li>\n<\/ul>\n<h5>\u628aallowRawInjectionDespiteWrapping\u8bbe\u7f6e\u4e3atrue\uff1a<\/h5>\n<pre><code class=\"language-java\">@Component\npublic class MyBeanFactoryPostProcessor implements BeanFactoryPostProcessor {\n    @Override\n    public void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory) throws BeansException {\n        ((AbstractAutowireCapableBeanFactory) beanFactory).setAllowRawInjectionDespiteWrapping(true);\n    }\n}<\/code><\/pre>\n<p>\u8fd9\u6837\u914d\u7f6e\u540e\uff0c\u5bb9\u5668\u542f\u52a8\u5c06\u4e0d\u518d\u62a5\u9519\uff0c\u5bb9\u5668\u5185\u7684a\u4e5f\u8986\u76d6\u4e3a\u4ee3\u7406\u5bf9\u8c61\u3002\u4f46\u662f\uff1aBean A\u7684<code>@Aysnc<\/code>\u65b9\u6cd5\u5c06\u4e0d\u8d77\u4f5c\u7528\uff0c\u56e0\u4e3aBean B\u91cc\u9762\u4f9d\u8d56\u7684a\u662f\u4e2a\u539f\u59cb\u5bf9\u8c61\uff0c\u6240\u4ee5\u5b83\u6700\u7ec8\u6ca1\u6cd5\u6267\u884c\u5f02\u6b65\u64cd\u4f5c\uff08\u5373\u4f7f\u5bb9\u5668\u5185\u7684a\u662f\u4e2a\u4ee3\u7406\u5bf9\u8c61\uff09<\/p>\n<p>\u9700\u8981\u6ce8\u610f\u7684\u662f\uff1a\u6b64\u65f6Spring\u5bb9\u5668\u91cc\u9762\u7684Bean A\u662fProxy\u4ee3\u7406\u5bf9\u8c61\u7684~~~<\/p>\n<p>\u4f46\u662f\u6b64\u79cd\u60c5\u51b5\u82e5\u662f\u6b63\u5e38\u4f9d\u8d56\uff08\u975e\u5faa\u73af\u4f9d\u8d56\uff09\u7684a\uff0c\u6ce8\u5165\u7684\u662f\u4ee3\u7406\u5bf9\u8c61\uff0c<code>@Async<\/code>\u5f02\u6b65\u4f9d\u65e7\u662f\u4f1a\u751f\u6548\u7684\u54e6~<\/p>\n<p>\u8fd9\u79cd\u89e3\u51b3\u65b9\u5f0f\u4e00\u65b9\u9762\u6ca1\u6709\u8fbe\u5230\u771f\u6b63\u7684\u76ee\u7684\uff08\u6bd5\u7adfBean A\u4e0a\u7684<code>@Aysnc<\/code>\u6ca1\u6709\u751f\u6548\uff0c\u867d\u7136\u975e\u5faa\u73af\u4f9d\u8d56\u7684<code>@Aysnc<\/code>\u53ef\u4ee5\u751f\u6548\uff09\u3002<\/p>\n<p>\u7531\u4e8e\u5b83\u53ea\u5bf9\u5faa\u73af\u4f9d\u8d56\u5185\u7684Bean\u53d7\u5f71\u54cd\uff0c\u6240\u4ee5\u5f71\u54cd\u8303\u56f4\u5e76\u4e0d\u662f\u5168\u5c40<\/p>\n<h5>\u4f7f\u7528@Lazy\u6216\u8005@ComponentScan(lazyInit = true)\u89e3\u51b3<\/h5>\n<p>\u672c\u5904\u4ee5\u4f7f\u7528<code>@Lazy<\/code>\u4e3a\u4f8b\uff1a\uff08\u5f3a\u70c8\u4e0d\u5efa\u8bae\u4f7f\u7528<code>@ComponentScan(lazyInit = true)<\/code>\u4f5c\u7528\u8303\u56f4\u592a\u5e7f\uff0c\u5bb9\u6613\u4ea7\u751f\u8bef\u4f24\uff09<\/p>\n<pre><code class=\"language-java\">@Service\npublic class B implements BInterface {\n    @Lazy\n    @Autowired\n    private AInterface a;\n\n    @Override\n    public void funB() {\n        System.out.println(&quot;\u7ebf\u7a0b\u540d\u79f0\uff1a&quot; + Thread.currentThread().getName());\n        a.funA();\n    }\n}<\/code><\/pre>\n<p>\u6ce8\u610f\u6b64<code>@Lazy<\/code>\u6ce8\u89e3\u52a0\u7684\u4f4d\u7f6e\uff0c\u56e0\u4e3aa\u6700\u7ec8\u4f1a\u662f<code>@Async<\/code>\u7684\u4ee3\u7406\u5bf9\u8c61\uff0c\u6240\u4ee5\u5728<code>@Autowired<\/code>\u5b83\u7684\u5730\u65b9\u6dfb\u52a0<code>@Async<\/code><\/p>\n<p>\u53e6\u5916\uff0c\u82e5\u4e0d\u5b58\u5728\u5faa\u73af\u4f9d\u8d56\u800c\u662f\u76f4\u63a5\u5f15\u7528a\uff0c\u662f\u4e0d\u7528\u52a0<code>@Lazy<\/code>\u7684<\/p>\n<p>\u53ea\u9700\u8981\u5728Bean b\u7684\u4f9d\u8d56\u5c5e\u6027\u4e0a\u52a0\u4e0a<code>@Lazy<\/code>\u5373\u53ef\u3002\uff08\u56e0\u4e3a\u662fB\u5e0c\u671b\u4f9d\u8d56\u8fdb\u6765\u7684\u662f\u6700\u7ec8\u7684\u4ee3\u7406\u5bf9\u8c61\u8fdb\u6765\uff0c\u6240\u4ee5B\u52a0\u4e0a\u5373\u53ef\uff0cA\u4e0a\u5e76\u4e0d\u9700\u8981\u52a0\uff09<\/p>\n<p>\u6700\u7ec8\u7684\u7ed3\u679c\u8ba9\u4eba\u6ee1\u610f\uff1a\u542f\u52a8\u6b63\u5e38\uff0c\u5e76\u4e14<code>@Async<\/code>\u5f02\u6b65\u6548\u679c\u4e5f\u751f\u6548\u4e86\uff0c\u56e0\u6b64<strong>\u672c\u65b9\u6848\u662f\u63a8\u8350\u7684<\/strong><\/p>\n<p>\u4f46\u662f\u9700\u8981\u7a0d\u5fae\u6ce8\u610f\u7684\u662f\uff1a\u6b64\u79cd\u60c5\u51b5\u4e0b<code>B\u91cc\u6301\u6709A\u7684\u5f15\u7528\u548cSpring\u5bb9\u5668\u91cc\u7684A\u5e76\u4e0d\u662f\u540c\u4e00\u4e2a\uff0cB\u4e2d\u6301\u6709\u7684A\u662f\u4ee3\u7406\u5bf9\u8c61\uff0c\u5bb9\u5668\u4e2d\u662f\u539f\u59cb\u5bf9\u8c61<\/code><\/p>\n<p>\u5173\u4e8e<code>@Autowired<\/code>\u548c<code>@Lazy<\/code>\u7684\u8054\u5408\u4f7f\u7528\u4e3a\u4f55\u662f\u6b64\u73b0\u8c61\uff0c\u5176\u5b9e<code>@Lazy<\/code>\u7684\u4ee3\u7406\u5bf9\u8c61\u662f\u7531<code>ContextAnnotationAutowireCandidateResolver<\/code>\u751f\u6210\u7684<\/p>\n<h5>\u4e0d\u8981\u8ba9@Async\u7684Bean\u53c2\u4e0e\u5faa\u73af\u4f9d\u8d56<\/h5>\n<p>\u663e\u7136\u5982\u679c\u65b9\u68483\u5982\u679c\u80fd\u591f\u89e3\u51b3\u5b83\u80af\u5b9a\u662f\u6700\u4f18\u7684\u65b9\u6848\u3002\u5948\u4f55\u5b83\u5374\u662f\u73b0\u5b9e\u60c5\u51b5\u4e2d\u6700\u4e3a\u96be\u8fbe\u5230\u7684\u65b9\u6848\u3002<\/p>\n<p>\u56e0\u4e3a\u5728\u5b9e\u9645\u4e1a\u52a1\u5f00\u53d1\u4e2d\u50cf\u5faa\u73af\u4f9d\u8d56\u3001\u7c7b\u5185\u65b9\u6cd5\u8c03\u7528\u7b49\u60c5\u51b5\u5e76\u4e0d\u80fd\u907f\u514d\uff0c\u9664\u975e\u91cd\u65b0\u8bbe\u8ba1\u3001\u6309\u89c4\u8303\u6539\u53d8\u4ee3\u7801\u7ed3\u6784\uff0c\u56e0\u6b64\u6b64\u79cd\u65b9\u6848\u5c31\u89c1\u4ec1\u89c1\u667a\u5427~<\/p>\n<h3>AopContext.currentProxy()<\/h3>\n<h3>\u4e3a\u4f55@Transactional\u5373\u4f7f\u5faa\u73af\u4f9d\u8d56\u4e5f\u6ca1\u6709\u95ee\u9898<\/h3>\n<p>\u540c\u4e3a\u521b\u5efa\u52a8\u6001\u4ee3\u7406\u5bf9\u8c61\uff0c\u540c\u4e3a\u4e00\u4e2a\u6ce8\u89e3\u6807\u6ce8\u5728\u7c7b\u4e0a\/\u65b9\u6cd5\u4e0a\uff0c\u4e3a\u4f55<code>@Transactional<\/code>\u5c31\u4e0d\u4f1a\u51fa\u73b0\u8fd9\u79cd\u542f\u52a8\u62a5\u9519\u5462\uff1f<\/p>\n<p>\u867d\u8bf4<code>@Async<\/code>\u548c<code>@Transactional<\/code>\u7684\u539f\u7406\u90fd\u662f\u4ea7\u751f\u4ee3\u7406\u5bf9\u8c61\uff0c\u4e14\u6ce8\u89e3\u7684\u4f7f\u7528\u65b9\u5f0f\u51e0\u4e4e\u65e0\u5f02\u3002\u533a\u522b\u662fSpring\u5bf9\u5b83\u4fe9\u7684\u89e3\u6790\u4e0d\u540c\uff0c\u4e5f\u5c31\u662f\u4ed6\u4eec\u4ee3\u7406\u7684\u521b\u5efa\u7684\u65b9\u5f0f\u4e0d\u540c\uff1a<\/p>\n<ul>\n<li><code>@Transactional<\/code>\u4f7f\u7528\u7684\u662f\u81ea\u52a8\u4ee3\u7406\u521b\u5efa\u5668<code>AbstractAutoProxyCreator<\/code>\uff0c\u5b83\u5b9e\u73b0\u4e86<code>getEarlyBeanReference()<\/code>\u65b9\u6cd5\u4ece\u800c\u5f88\u597d\u7684\u5bf9\u5faa\u73af\u4f9d\u8d56\u63d0\u4f9b\u4e86\u652f\u6301<\/li>\n<li><code>@Async<\/code>\u7684\u4ee3\u7406\u521b\u5efa\u4f7f\u7528\u7684\u662f<code>AsyncAnnotationBeanPostProcessor<\/code>\u5355\u72ec\u7684\u540e\u7f6e\u5904\u7406\u5668\u5b9e\u73b0\u7684\uff0c\u5b83\u53ea\u5728\u4e00\u5904<code>postProcessAfterInitialization()<\/code>\u5b9e\u73b0\u4e86\u5bf9\u4ee3\u7406\u5bf9\u8c61\u7684\u521b\u5efa\uff0c\u56e0\u6b64\u82e5\u51fa\u73b0\u5b83\u88ab\u5faa\u73af\u4f9d\u8d56\uff0c\u5c31\u4f1a\u62a5\u9519\u5982\u4e0a~~~<\/li>\n<\/ul>\n<p>\u6700\u540e\uff0c\u5728\u7406\u89e3\u539f\u7406\u7684\u57fa\u7840\u4e0a\u8fd8\u9700\u8981\u6ce8\u610f\u5982\u4e0b\u8fd9\u4e2acase\uff08\u52a0\u6df1\u7406\u89e3\uff09\uff0c\u82e5\u662f\u4e0b\u9762\u8fd9\u79cd\u60c5\u51b5\uff0c\u5176\u5b9e\u662f\u542f\u52a8\u4e0d\u62a5\u9519\u4e14\u53ef\u4ee5\u6b63\u5e38work\u7684\uff1a<\/p>\n<p>\u548c\u4e0a\u9762\u793a\u4f8b\u76f8\u6bd4\uff1a\u552f\u4e00\u533a\u522b\u662f\u628a@Async\u5199\u5728Bean B\u4e0a\u800cA\u6ca1\u6709\u5199\uff08\u4e0a\u9762\u662f\u5199\u5728Bean A\u4e0a\u800cB\u4e2d\u6ca1\u6709\u5199\uff09<\/p>\n<pre><code class=\"language-java\">@Service\npublic class A implements AInterface{\n    @Autowired\n    private BInterface b;\n\n    @Override\n    public void funA() {\n    }\n}\n\n@Service\npublic class B implements BInterface {\n    @Autowired\n    private AInterface a;\n\n    @Async  \/\/\u5199\u5728B\u7684\u65b9\u6cd5\u4e0a\uff0c\u8fd9\u6837B\u6700\u7ec8\u4f1a\u88ab\u521b\u5efa\u4ee3\u7406\u5bf9\u8c61\n    @Override\n    public void funB() {\n        a.funA();\n    }\n}<\/code><\/pre>\n<p>\u5907\u6ce8\uff1a\u82e5\u6309\u7167\u6b63\u5e38Spring\u5bb9\u5668\u4f1a\u5148\u521d\u59cb\u5316A\uff0c\u542f\u52a8\u5c31\u80af\u5b9a\u662f\u4e0d\u4f1a\u62a5\u9519\u7684\uff0c\u8fd9\u4e5f\u5c31\u662f\u6211\u4e0a\u9762\u8bf4\u7684\u7ed3\u8bba\uff1a\u8fd9\u79cd\u60c5\u51b5\u4e0b\u9ed8\u8ba4\u662f\u53ef\u4ee5work\u7684<\/p>\n<p>\u901a\u8fc7\u731c\u6d4b\u4e5f\u80fd\u591f\u731c\u5230\uff0cA\u548cB\u4e0d\u662f\u5bf9\u7b49\u7684\u5173\u7cfb\uff0c\u5904\u7406\u7ed3\u679c\u548cBean\u7684\u521d\u59cb\u5316\u987a\u5e8f\u6709\u5173\u3002<\/p>\n<blockquote>\n<p>\u81f3\u4e8eSpring\u5bf9Bean\u7684\u5b9e\u4f8b\u5316\u3001\u521d\u59cb\u5316\u987a\u5e8f\uff0c\u82e5\u6ca1\u6709\u7279\u522b\u5e72\u9884\u7684\u60c5\u51b5\u4e0b\uff0c\u5b83\u548c\u7c7b\u540d\u5b57\u6bcd\u6392\u5e8f\u6709\u5173~<\/p>\n<\/blockquote>\n<p>\u4e3a\u4e86\u8bf4\u660e\u95ee\u9898\uff0c\u6b64\u5904\u6211\u4eba\u5de5\u5e72\u9884\u5148\u8ba9Spring\u5bb9\u5668\u521d\u59cb\u5316B\uff08\u6b64\u5904\u65b9\u6848\u4e3a\u4f7f\u7528@DependsOn(&quot;b&quot;)\uff09\uff1a<\/p>\n<pre><code>@DependsOn(&quot;b&quot;)\n@Service\npublic class A implements AInterface { ... }<\/code><\/pre>\n<p>\u8fd9\u6837\u5e72\u9884\u80fd\u591f\u4fdd\u8bc1B\u80af\u5b9a\u5728A\u4e4b\u524d\u521d\u59cb\u5316\uff0c\u7136\u540e\u542f\u52a8\u4e5f\u5c31\u4f1a\u62a5\u540c\u6837\u9519\u8bef\uff1a\uff08\u5f53\u7136\u6b64\u5904\u62a5\u9519\u4fe1\u606f\u662fbean b\uff09\uff1a<\/p>\n<pre><code>org.springframework.beans.factory.BeanCurrentlyInCreationException: Error creating bean with name &#039;b&#039;: Bean with name &#039;b&#039; has been injected into other beans [a] in its raw version as part of a circular reference, but has eventually been wrapped. This means that said other beans do not use the final version of the bean. This is often the result of over-eager type matching - consider using &#039;getBeanNamesOfType&#039; with the &#039;allowEagerInit&#039; flag turned off, for example.\n    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:622)\n    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515)\n    at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320)\n    ...<\/code><\/pre>\n<p>\u82e5\u6280\u672f\u654f\u611f\u70b9\u7684\u5c0f\u4f19\u4f34\u53d1\u73b0\uff0c\u6b64\u5904\u80fd\u591f\u7ed9\u6211\u4eec\u4e00\u4e2a\u89e3\u51b3\u81ea\u5df1\u4f9d\u8d56\u81ea\u5df1\u95ee\u9898\u7684\u53e6\u5916\u4e00\u4e2a\u601d\u8def\uff0c\u662f\u5426\u53ef\u4ee5\u8003\u8651\u5e72\u9884\u4e00\u4e0bBean\u7684\u521d\u59cb\u5316\u987a\u5e8f\u6765\u8fbe\u5230\u6b63\u5e38\u542f\u52a8\u7684\u76ee\u7684\u5462\uff1f<\/p>\n<p>\u7406\u8bba\u4e0a\u662f\u53ef\u884c\u7684\uff0c\u4f46\u662f\u5728\u5b9e\u64cd\u8fc7\u7a0b\u4e2d\u4e2a\u4eba\u4e0d\u592a\u5efa\u8bae\u8fd9\u4e48\u53bb\u5e72\uff08\u5982\u679c\u6709\u66f4\u597d\u7684\u65b9\u6848\u7684\u8bdd\uff09~<\/p>\n<h2>\u603b\u7ed3<\/h2>\n<p>\u867d\u7136Spring\u5b98\u65b9\u4e5f\u4e0d\u63a8\u8350\u5faa\u73af\u4f9d\u8d56\uff0c\u4f46\u662f\u4e00\u4e2a\u662f\u7406\u60f3\u60c5\u51b5\uff0c\u4e00\u4e2a\u73b0\u5b9e\u60c5\u51b5\uff0c\u5b83\u4fe9\u662f\u6709\u5dee\u8ddd\u548c\u5dee\u5f02\u7684\u3002<\/p>\n<p>\u73b0\u5b9e\u4f7f\u7528\u4e2d\uff0c\u7279\u522b\u662f\u4e1a\u52a1\u5f00\u53d1\u4e2d\u5faa\u73af\u4f9d\u8d56\u53ef\u4ee5\u8bf4\u662f\u51e0\u4e4e\u907f\u514d\u4e0d\u4e86\u7684\uff0c\u56e0\u6b64\u77e5\u5176\u7136\u800c\u77e5\u5176\u6240\u4ee5\u7136\u540e\uff0c\u624d\u80fd\u5f7b\u5e95\u7684\u5927\u5f7b\u5927\u609f\uff0c\u9047\u5230\u95ee\u9898\u4e0d\u518d\u8499\u5708\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u73b0\u8c61\u63cf\u8ff0 Spring Boot\u5de5\u7a0b\u4e2d\u4f7f\u7528@Async\u65f6\uff0c\u78b0\u5230\u5faa\u73af\u4f9d\u8d56\uff08circular reference\uff09 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[41],"tags":[],"class_list":["post-1433","post","type-post","status-publish","format-standard","hentry","category-spring-boot"],"_links":{"self":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts\/1433","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/comments?post=1433"}],"version-history":[{"count":0,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts\/1433\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/media?parent=1433"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/categories?post=1433"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/tags?post=1433"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}