{"id":1790,"date":"2023-03-27T22:24:45","date_gmt":"2023-03-27T14:24:45","guid":{"rendered":"https:\/\/www.appblog.cn\/?p=1790"},"modified":"2023-04-23T21:14:25","modified_gmt":"2023-04-23T13:14:25","slug":"spring-boot-asynchronous-service-based-on-deferredresult","status":"publish","type":"post","link":"https:\/\/www.appblog.cn\/index.php\/2023\/03\/27\/spring-boot-asynchronous-service-based-on-deferredresult\/","title":{"rendered":"Spring Boot \u57fa\u4e8eDeferredResult\u7684\u5f02\u6b65\u670d\u52a1"},"content":{"rendered":"<h2>\u573a\u666f<\/h2>\n<p>\u5047\u8bbe\u6211\u4eec\u73b0\u5728\u8981\u5b9e\u73b0\u8fd9\u6837\u4e00\u4e2a\u529f\u80fd\uff1a\u6d4f\u89c8\u5668\u8981\u5b9e\u65f6\u5c55\u793a\u670d\u52a1\u7aef\u8ba1\u7b97\u51fa\u6765\u7684\u6570\u636e\u3002<br \/>\n\u4e00\u79cd\u53ef\u80fd\u7684\u5b9e\u73b0\u662f\uff1a\u6d4f\u89c8\u5668\u9891\u7e41\uff08\u4f8b\u5982\u5b9a\u65f61\u79d2\uff09\u5411\u670d\u52a1\u7aef\u53d1\u8d77\u8bf7\u6c42\u4ee5\u83b7\u5f97\u670d\u52a1\u7aef\u6570\u636e\u3002\u4f46\u5b9a\u65f6\u8bf7\u6c42\u5e76\u4e0d\u80fd\u201c\u5b9e\u65f6\u201d\u53cd\u5e94\u670d\u52a1\u7aef\u7684\u6570\u636e\u53d8\u5316\u60c5\u51b5\u3002<br \/>\n\u82e5\u5b9a\u65f6\u5468\u671f\u4e3aS\uff0c\u5219\u6570\u636e\u5ef6\u8fdf\u5468\u671f\u6700\u5927\u5373\u4e3aS\u3002\u82e5\u60f3\u7f29\u77ed\u6570\u636e\u5ef6\u8fdf\u5468\u671f\uff0c\u5219\u5e94\u4f7fS\u5c3d\u91cf\u5c0f\uff0c\u800cS\u8d8a\u5c0f\uff0c\u6d4f\u89c8\u5668\u5411\u670d\u52a1\u7aef\u53d1\u8d77\u8bf7\u6c42\u7684\u9891\u7387\u8d8a\u9ad8\uff0c\u53c8\u9020\u6210\u7f51\u7edc\u63e1\u624b\u6b21\u6570\u8d8a\u591a\uff0c\u5f71\u54cd\u4e86\u6548\u7387\u3002\u56e0\u6b64\uff0c\u6b64\u573a\u666f\u5e94\u4f7f\u7528\u670d\u52a1\u7aef\u5b9e\u65f6\u63a8\u9001\u6280\u672f\u3002<\/p>\n<p><!-- more --><\/p>\n<p>\u8fd9\u91cc\u8bf4\u662f\u63a8\u9001\uff0c\u5176\u5b9e\u8fd8\u662f\u57fa\u4e8e\u8bf7\u6c42-\u54cd\u5e94\u673a\u5236\uff0c\u53ea\u4e0d\u8fc7\u53d1\u8d77\u7684\u8bf7\u6c42\u4f1a\u5728\u670d\u52a1\u7aef\u6302\u8d77\uff0c\u76f4\u5230\u8bf7\u6c42\u8d85\u65f6\u6216\u670d\u52a1\u7aef\u6709\u6570\u636e\u63a8\u9001\u65f6\u624d\u4f1a\u505a\u51fa\u54cd\u5e94\uff0c\u54cd\u5e94\u7684\u65f6\u673a\u5b8c\u5168\u7531\u670d\u52a1\u7aef\u63a7\u5236\u3002\u6240\u4ee5\uff0c\u6574\u4f53\u6548\u679c\u770b\u8d77\u6765\u5c31\u50cf\u662f\u670d\u52a1\u7aef\u771f\u7684\u5728\u201c\u5b9e\u65f6\u63a8\u9001\u201d\u4e00\u6837\u3002<\/p>\n<p>\u53ef\u4ee5\u5229\u7528<code>DeferredResult<\/code>\u6765\u5b9e\u73b0\u5f02\u6b65\u957f\u8fde\u63a5\u7684\u670d\u52a1\u7aef\u5b9e\u65f6\u63a8\u9001\u3002<\/p>\n<h2>\u4e3a\u4ec0\u4e48\u4f7f\u7528DeferredResult<\/h2>\n<ul>\n<li>API\u63a5\u53e3\u9700\u8981\u5728\u6307\u5b9a\u65f6\u95f4\u5185\u5c06\u5f02\u6b65\u64cd\u4f5c\u7684\u7ed3\u679c\u540c\u6b65\u8fd4\u56de\u7ed9\u524d\u7aef\u65f6<\/li>\n<li>Controller\u5904\u7406\u8017\u65f6\u4efb\u52a1\uff0c\u5e76\u4e14\u9700\u8981\u8017\u65f6\u4efb\u52a1\u7684\u8fd4\u56de\u7ed3\u679c\u65f6<\/li>\n<\/ul>\n<p>\u5f53\u4e00\u4e2a\u8bf7\u6c42\u5230\u8fbeAPI\u63a5\u53e3\uff0c\u5982\u679c\u8be5API\u63a5\u53e3\u7684<code>return<\/code>\u8fd4\u56de\u503c\u662f<code>DeferredResult<\/code>\uff0c\u5728\u6ca1\u6709\u8d85\u65f6\u6216\u8005<code>DeferredResult<\/code>\u5bf9\u8c61\u8bbe\u7f6e<code>setResult<\/code>\u4e4b\u524d\uff0c\u63a5\u53e3\u4e0d\u4f1a\u8fd4\u56de\uff0c\u4f46\u662fServlet\u5bb9\u5668\u7ebf\u7a0b\u4f1a\u7ed3\u675f\uff0c<code>DeferredResult<\/code>\u53e6\u8d77\u7ebf\u7a0b\u6765\u8fdb\u884c\u7ed3\u679c\u5904\u7406(\u5373\u8fd9\u79cd\u64cd\u4f5c\u63d0\u5347\u4e86\u670d\u52a1\u77ed\u65f6\u95f4\u7684\u541e\u5410\u80fd\u529b)\uff0c\u5e76<code>setResult<\/code>\uff0c\u5982\u6b64\u4ee5\u6765\u8fd9\u4e2a\u8bf7\u6c42\u4e0d\u4f1a\u5360\u7528\u670d\u52a1\u8fde\u63a5\u6c60\u592a\u4e45\uff0c\u5982\u679c\u8d85\u65f6\u6216\u8bbe\u7f6e<code>setResult<\/code>\uff0c\u63a5\u53e3\u4f1a\u7acb\u5373\u8fd4\u56de\u3002<\/p>\n<p>\u4f7f\u7528<code>DeferredResult<\/code>\u7684\u6d41\u7a0b\uff1a<\/p>\n<ul>\n<li>\u6d4f\u89c8\u5668\u53d1\u8d77\u5f02\u6b65\u8bf7\u6c42<\/li>\n<li>\u8bf7\u6c42\u5230\u8fbe\u670d\u52a1\u7aef\u88ab\u6302\u8d77\uff08\u4f7f\u7528\u6d4f\u89c8\u5668\u67e5\u770b\u8bf7\u6c42\u72b6\u6001\uff0c\u6b64\u65f6\u4e3a<code>pending<\/code>\uff09<\/li>\n<li>\u5411\u6d4f\u89c8\u5668\u8fdb\u884c\u54cd\u5e94\uff0c\u5206\u4e3a\u4e24\u79cd\u60c5\u51b5\uff1a<\/li>\n<li>\n<ul>\n<li>\u8c03\u7528<code>DeferredResult.setResult()<\/code>\uff0c\u8bf7\u6c42\u88ab\u5524\u9192\uff0c\u8fd4\u56de\u7ed3\u679c<\/li>\n<\/ul>\n<\/li>\n<li>\n<ul>\n<li>\u8d85\u65f6\uff0c\u8fd4\u56de\u4e00\u4e2a\u4f60\u8bbe\u5b9a\u7684\u7ed3\u679c<\/li>\n<\/ul>\n<\/li>\n<li>\u6d4f\u89c8\u5f97\u5230\u54cd\u5e94\uff0c\u518d\u6b21\u91cd\u590d1\uff0c\u5904\u7406\u6b64\u6b21\u54cd\u5e94\u7ed3\u679c<\/li>\n<\/ul>\n<p>\u7ed9\u4eba\u4e00\u79cd\u5f02\u6b65\u5904\u7406\u4e1a\u52a1\uff0c\u4f46\u662f\u5374\u540c\u6b65\u8fd4\u56de\u7684\u611f\u89c9\u3002<\/p>\n<h2>\u6838\u5fc3\u4ee3\u7801<\/h2>\n<pre><code class=\"language-java\">@RequestMapping(&quot;\/call&quot;)\n@ResponseBody\npublic DeferredResult&lt;Object&gt; call() { \/\/ \u6cdb\u578bObject\u8868\u793a\u8fd4\u56de\u7ed3\u679c\u7684\u7c7b\u578b\n    DeferredResult&lt;Object&gt; response = new DeferredResult&lt;Object&gt;( \n        10000, \/\/ \u8bf7\u6c42\u7684\u8d85\u65f6\u65f6\u95f4 \n        null); \/\/ \u8d85\u65f6\u540e\u54cd\u5e94\u7684\u7ed3\u679c\n    response.onCompletion(new Runnable() {\n\n        @Override\n        public void run() {\n            \/\/ \u8bf7\u6c42\u5904\u7406\u5b8c\u6210\u540e\u6240\u505a\u7684\u4e00\u4e9b\u5de5\u4f5c\n        }\n    });\n    \/\/ \u8bbe\u7f6e\u54cd\u5e94\u7ed3\u679c\n    \/\/ \u8c03\u7528\u6b64\u65b9\u6cd5\u65f6\u7acb\u5373\u5411\u6d4f\u89c8\u5668\u53d1\u51fa\u54cd\u5e94\uff0c\u672a\u8c03\u7528\u65f6\u8bf7\u6c42\u88ab\u6302\u8d77\n    response.setResult(new Object());\n    return response;\n}<\/code><\/pre>\n<h2>Spring Boot \u4f7f\u7528DeferredResult<\/h2>\n<h3>\u5728pom.xml\u4e2d\u5f15\u5165\u914d\u7f6e<\/h3>\n<pre><code class=\"language-xml\">&lt;dependency&gt;\n    &lt;groupId&gt;org.springframework.boot&lt;\/groupId&gt;\n    &lt;artifactId&gt;spring-boot-starter-web&lt;\/artifactId&gt;\n&lt;\/dependency&gt;<\/code><\/pre>\n<h3>\u5efa\u7acbService\u5c42\u63a5\u53e3<\/h3>\n<pre><code class=\"language-java\">public interface PiceaService {\n    \/\/\u65e0\u8fd4\u56de\u53c2\u6570\u65b9\u6cd5\n    void task() throws Exception;\n    \/\/\u6709\u8fd4\u56de\u53c2\u6570\u65b9\u6cd5\n    String task2() throws Exception;\n}<\/code><\/pre>\n<h3>\u5efa\u7acbService\u5c42\u5b9e\u73b0<\/h3>\n<p>Service\u5c42\u63a5\u53e3\u4e0e\u5b9e\u73b0\uff0c\u8ddf\u5176\u4ed6\u6b63\u5e38\u540c\u6b65\u8bf7\u6c42\u4e00\u6837\uff0c\u6ca1\u6709\u5dee\u522b<\/p>\n<pre><code class=\"language-java\">@Service\npublic class PiceaServiceImpl implements PiceaService {\n\n    @Override\n    public void task() throws Exception {\n        System.out.println(&quot;------------------------\u5728\u770b\u8c82\u8749\uff0c\u4e0d\u8981\u6253\u6270--------------&quot;);\n        Thread.sleep(1000);\n    }\n\n    @Override\n    public String task2() throws Exception {\n        int k = 1;\n        System.out.println(&quot;------------------------\u5728\u770b\u9c7c\uff0c\u4e0d\u8981\u6253\u6270--------------&quot;);\n        Thread.sleep(1000);\n        return (String.valueOf(k));\n    }\n}<\/code><\/pre>\n<h3>\u5efa\u7acbContoller\u5c42\u65b9\u6cd5<\/h3>\n<p>\u8fd9\u662f\u91cd\u70b9\u548c\u6838\u5fc3\uff0c\u9996\u5148\u8981\u5b9a\u4e49\u4e00\u4e2a\u7ebf\u7a0b\u6c60\u6765\u5904\u7406\u5f02\u6b65\u7684\u4efb\u52a1\u3002\u7136\u540e\u5c31\u662f\u7f16\u5199\u5f02\u6b65\u7684\u8c03\u7528\u65b9\u6cd5\u3002<\/p>\n<pre><code class=\"language-java\">@RestController\npublic class PiceaServletContoller {\n\n    @Autowired\n    private PiceaService piceaService;\n\n    @RequestMapping(&quot;\/deferredresult&quot;)\n    public DeferredResult&lt;String&gt; deferredResult() throws Exception {\n        System.out.println(&quot;\u63a7\u5236\u5c42\u6267\u884c\u7ebf\u7a0b: &quot; + Thread.currentThread().getName());\n        \/\/\u8d85\u65f6\n        DeferredResult&lt;String&gt; deferredResult = new DeferredResult&lt;String&gt;(10*1000L);\n        deferredResult.onTimeout(new Runnable() {\n            @Override\n            public void run() {\n                System.out.println(&quot;\u5f02\u6b65\u7ebf\u7a0b\u6267\u884c\u8d85\u65f6&quot;);\n                deferredResult.setResult(&quot;\u7ebf\u7a0b\u6267\u884c\u8d85\u65f6&quot;);\n            }\n        });\n        deferredResult.onCompletion(new Runnable() {\n            @Override\n            public void run() {\n                System.out.println(&quot;\u5f02\u6b65\u6267\u884c\u5b8c\u6bd5&quot;);\n            }\n        });\n        FIXED_THREAD_POOL.execute(new Runnable() {\n            @Override\n            public void run() {\n                System.out.println(&quot;\u5f02\u6b65\u6267\u884c\u7ebf\u7a0b: &quot; + Thread.currentThread().getName());\n                try {\n                    String str = piceaService.task2();\n                    Thread.sleep(1000);\n                    deferredResult.setResult(&quot;\u8fd9\u662f\u3010\u5f02\u6b65\u3011\u7684\u8bf7\u6c42\u8fd4\u56de: &quot; + str);\n                } catch (InterruptedException e) {\n                    e.printStackTrace();\n                } catch (Exception e) {\n                    e.printStackTrace();\n                }\n            }\n        });\n        return deferredResult;\n    }\n\n    \/**\n     * \u7ebf\u7a0b\u6c60\n     *\/\n    public static ExecutorService FIXED_THREAD_POOL = Executors.newFixedThreadPool(10);\n}<\/code><\/pre>\n<h3>\u6d4b\u8bd5\u7ed3\u679c\u53ca\u65b9\u6cd5<\/h3>\n<p>\u6d4f\u89c8\u5668\u4e2d\u8bbf\u95ee<code>http:\/\/localhost:2001\/deferredresult<\/code>\u6d4b\u8bd5\u7ed3\u679c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u573a\u666f \u5047\u8bbe\u6211\u4eec\u73b0\u5728\u8981\u5b9e\u73b0\u8fd9\u6837\u4e00\u4e2a\u529f\u80fd\uff1a\u6d4f\u89c8\u5668\u8981\u5b9e\u65f6\u5c55\u793a\u670d\u52a1\u7aef\u8ba1\u7b97\u51fa\u6765\u7684\u6570\u636e\u3002 \u4e00\u79cd\u53ef\u80fd\u7684\u5b9e\u73b0\u662f\uff1a\u6d4f\u89c8\u5668\u9891\u7e41\uff08\u4f8b [&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":[454],"class_list":["post-1790","post","type-post","status-publish","format-standard","hentry","category-spring-boot","tag-454"],"_links":{"self":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts\/1790","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=1790"}],"version-history":[{"count":0,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts\/1790\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/media?parent=1790"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/categories?post=1790"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/tags?post=1790"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}