{"id":5803,"date":"2024-08-01T22:46:24","date_gmt":"2024-08-01T14:46:24","guid":{"rendered":"https:\/\/xinchewhd.com.cn\/?p=5803"},"modified":"2024-08-01T22:46:24","modified_gmt":"2024-08-01T14:46:24","slug":"%e6%89%93%e9%80%a0%e8%b6%85%e9%ab%98%e6%80%a7%e8%83%bd%e7%9a%84%e6%8e%a5%e5%8f%a3api%e7%9a%8412%e4%b8%aa%e6%8a%80%e5%b7%a7","status":"publish","type":"post","link":"https:\/\/xinchewhd.com.cn\/index.php\/java\/%e6%89%93%e9%80%a0%e8%b6%85%e9%ab%98%e6%80%a7%e8%83%bd%e7%9a%84%e6%8e%a5%e5%8f%a3api%e7%9a%8412%e4%b8%aa%e6%8a%80%e5%b7%a7\/","title":{"rendered":"\u6253\u9020\u8d85\u9ad8\u6027\u80fd\u7684\u63a5\u53e3API\u768412\u4e2a\u6280\u5de7~"},"content":{"rendered":"
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<\/mp-common-profile><\/section>\n<\/fieldset>\n

1. \u5e76\u884c\u5904\u7406<\/h1>\n

\u7b80\u8981\u8bf4\u660e<\/h3>\n

\u4e3e\u4e2a\u4f8b\u5b50\uff1a\u5728\u4ef7\u683c\u67e5\u8be2\u94fe\u8def\u4e2d\uff0c\u6211\u4eec\u9700\u8981\u83b7\u53d6\u591a\u79cd\u72ec\u7acb\u7684\u4ef7\u683c\u914d\u7f6e\u9879\u4fe1\u606f\uff0c\u5982\u57fa\u7840\u4ef7\u3001\u6298\u6263\u4ef7\u3001\u5546\u6237\u6d3b\u52a8\u4ef7\u3001\u5e73\u53f0\u6d3b\u52a8\u4ef7\u7b49\u7b49\u3002\u4e3a\u4e86\u52a0\u5feb\u5904\u7406\u901f\u5ea6\uff0c\u53ef\u4ee5\u4f7f\u7528\u591a\u7ebf\u7a0b\u5e76\u884c\u5904\u7406\u7684\u65b9\u5f0f\uff0c\u5229\u7528\u5e76\u53d1\u8ba1\u7b97\u7684\u4f18\u52bf\u3002\u800cCompletableFuture<\/code>\u662f\u4e00\u79cd\u6d41\u884c\u7684\u5b9e\u73b0\u591a\u7ebf\u7a0b\u7684\u65b9\u5f0f\uff0c\u5b83\u53ef\u4ee5\u8f7b\u677e\u5730\u7ba1\u7406\u7ebf\u7a0b\u7684\u521b\u5efa\u3001\u6267\u884c\u548c\u56de\u8c03\uff0c\u63d0\u9ad8\u7a0b\u5e8f\u7684\u53ef\u6269\u5c55\u6027\u548c\u5e76\u53d1\u6027\u3002<\/p>\n

\u7136\u800c\uff0c\u591a\u7ebf\u7a0b\u7684\u4f7f\u7528\u4e5f\u5b58\u5728\u4e00\u4e9b\u5f0a\u7aef\uff0c\u4f8b\u5982\u786c\u4ef6\u8d44\u6e90\u7684\u9650\u5236\u548c\u7ebf\u7a0b\u95f4\u7684\u901a\u4fe1\u5f00\u9500\u7b49\u3002\u56e0\u6b64\uff0c\u6211\u4eec\u9700\u8981\u5728\u4f7f\u7528\u591a\u7ebf\u7a0b\u7684\u540c\u65f6\uff0c\u8003\u8651\u5230 I\/O \u5bc6\u96c6\u578b\u548c CPU \u5bc6\u96c6\u578b\u7684\u5dee\u5f02\uff0c\u4ee5\u907f\u514d\u8fc7\u5ea6\u5f00\u542f\u7ebf\u7a0b\u5bfc\u81f4\u6027\u80fd\u4e0b\u964d\u3002\u540c\u65f6\uff0c\u5bf9\u4e8e\u7ebf\u7a0b\u6c60\u7684\u8fd0\u884c\u60c5\u51b5\uff0c\u6211\u4eec\u4e5f\u9700\u8981\u6709\u4e00\u5b9a\u7684\u4e86\u89e3\u548c\u63a7\u5236\uff0c\u4ee5\u786e\u4fdd\u7a0b\u5e8f\u7684\u9ad8\u6548\u7a33\u5b9a\u8fd0\u884c\u3002<\/p>\n

CompletableFuture \u662f\u94f6\u5f39\u5417\uff1f<\/h3>\n

\u6211\u4eec\u5e38\u8bf4\u201c\u624b\u62ff\u9524\u5b50\u770b\u4ec0\u4e48\u90fd\u50cf\u9489\u5b50\u201d\uff0c\u4f7f\u7528CompletableFuture<\/code>\u7684\u786e\u80fd\u591f\u5e2e\u52a9\u6211\u4eec\u89e3\u51b3\u8bb8\u591a\u72ec\u7acb\u5904\u7406\u903b\u8f91\u7684\u95ee\u9898\uff0c\u4f46\u662f\u5982\u679c\u4f7f\u7528\u8fc7\u591a\u7684\u7ebf\u7a0b\uff0c\u53cd\u800c\u4f1a\u5bfc\u81f4\u7ebf\u7a0b\u8c03\u5ea6\u65f6\u95f4\u4e0d\u80fd\u5f97\u5230\u4fdd\u969c\uff0c\u7ebf\u7a0b\u4f1a\u88ab\u6d6a\u8d39\u5728\u7b49\u5f85 CPU \u65f6\u95f4\u7247\u4e0a\uff0c\u7279\u522b\u662f\u5bf9\u4e8e\u90a3\u4e9b\u672c\u6765\u6267\u884c\u901f\u5ea6\u5c31\u5f88\u5feb\u7684\u4efb\u52a1\uff0c\u4f7f\u7528 CompletableFuture \u4e4b\u540e\u53cd\u800c\u4f1a\u62d6\u6162\u6574\u4f53\u6267\u884c\u65f6\u957f\u3002<\/p>\n

\u56e0\u6b64\uff0c\u5728\u4f7f\u7528CompletableFuture<\/code>\u65f6\uff0c\u6211\u4eec\u9700\u8981\u6839\u636e\u5177\u4f53\u7684\u573a\u666f\u548c\u4efb\u52a1\uff0c\u4ed4\u7ec6\u8003\u8651\u662f\u5426\u9700\u8981\u5e76\u884c\u5904\u7406\u3002\u5982\u679c\u9700\u8981\u5e76\u884c\u5904\u7406\uff0c\u6211\u4eec\u9700\u8981\u6839\u636e\u4efb\u52a1\u7684\u6027\u8d28\u548c\u6267\u884c\u901f\u5ea6\uff0c\u9009\u62e9\u5408\u9002\u7684\u7ebf\u7a0b\u6c60\u5927\u5c0f\u548c\u5e76\u884c\u7ebf\u7a0b\u6570\u91cf\uff0c\u4ee5\u907f\u514d\u7ebf\u7a0b\u8c03\u5ea6\u65f6\u95f4\u7684\u6d6a\u8d39\u548c\u6267\u884c\u6548\u7387\u7684\u4e0b\u964d\u3002<\/p>\n

\u6d4b\u8bd5\u6848\u4f8b<\/h3>\n

\u6267\u884c a,b,c,d4 \u4e2a\u65b9\u6cd5\uff0c\u6bd4\u8f83\u540c\u6b65\u6267\u884c\u4e0e\u5f02\u6b65\u6267\u884c\u7684\u8017\u65f6\u60c5\u51b5\u3002<\/p>\n

\u5168\u540c\u6b65\u6267\u884c<\/h4>\n
<\/span>private<\/span>void<\/span>test<\/span>(){long<\/span>s<\/span>=System.currentTimeMillis();a(10<\/span>);b(10<\/span>);c(10<\/span>);d(10<\/span>);long<\/span>e<\/span>=System.currentTimeMillis();System.out.println(e-s);}public<\/span>void<\/span>a<\/span>(int<\/span>time){try<\/span>{Thread.sleep(time);}catch<\/span>(InterruptedExceptione){e.printStackTrace();}}public<\/span>void<\/span>b<\/span>(int<\/span>time){try<\/span>{Thread.sleep(time);}catch<\/span>(InterruptedExceptione){e.printStackTrace();}}public<\/span>void<\/span>c<\/span>(int<\/span>time){try<\/span>{Thread.sleep(time);}catch<\/span>(InterruptedExceptione){e.printStackTrace();}}public<\/span>void<\/span>d<\/span>(int<\/span>time){try<\/span>{Thread.sleep(time);}catch<\/span>(InterruptedExceptione){e.printStackTrace();}}<\/code><\/pre>\n
\u5168\u5f02\u6b65\u6267\u884c<\/h4>\n
<\/span>private<\/span>void<\/span>test2<\/span>(){long<\/span>s<\/span>=System.currentTimeMillis();List<CompletableFuture<?>>completableFutureList=new<\/span>ArrayList<\/span><>();CompletableFuture<Void>future1=CompletableFuture.runAsync(()->{a(10<\/span>);});completableFutureList.add(future1);CompletableFuture<Void>future2=CompletableFuture.runAsync(()->{b(10<\/span>);});completableFutureList.add(future2);CompletableFuture<Void>future3=CompletableFuture.runAsync(()->{c(10<\/span>);});completableFutureList.add(future3);CompletableFuture<Void>future4=CompletableFuture.runAsync(()->{d(10<\/span>);});completableFutureList.add(future4);CompletableFuture<?>[]futures=completableFutureList.toArray(new<\/span>CompletableFuture<\/span>[0<\/span>]);CompletableFuture<Void>futureAll=CompletableFuture.allOf(futures);futureAll.join();long<\/span>e<\/span>=System.currentTimeMillis();System.out.println(e-s);}<\/code><\/pre>\n
\u7ed3\u679c\u7edf\u8ba1<\/h4>\n
\u6d4b\u8bd5\u7ed3\u8bba<\/h3>\n
\u5728\u5206\u914d\u4e86\u76f8\u5bf9\u5408\u7406\u7684\u7ebf\u7a0b\u6c60\u7684\u60c5\u51b5\u4e0b\uff0c\u901a\u8fc7\u4ee5\u4e0a\u5206\u6790\uff0c\u53ef\u4ee5\u5f97\u51fa\u4e0b\u5217\u4e24\u4e2a\u7ed3\u8bba\uff1a<\/p>\n
    \n
  • \n
    \u2022\u65b9\u6cd5\u8017\u65f6\u8d8a\u5c11\uff0c\u540c\u6b65\u6bd4\u5f02\u6b65\u8d8a\u597d\u3002<\/p>\n<\/li>\n
  • \n
    \u2022\u65b9\u6cd5\u6570\u91cf\u8d8a\u5c11\uff0c\u540c\u6b65\u6bd4\u5f02\u6b65\u8d8a\u597d\u3002<\/p>\n<\/li>\n<\/ul>\n
    \u534a\u5f02\u6b65\uff0c\u534a\u540c\u6b65<\/h3>\n
    \u6709\u65f6\u5019\uff0c\u5982\u679c\u65b9\u6cd5\u8f83\u591a\uff0c\u4e3a\u4e86\u51cf\u5c11\u9ad8\u5e76\u53d1\u65f6 P99 \u8f83\u9ad8\uff0c\u6211\u4eec\u53ef\u4ee5\u8ba9\u8017\u65f6\u591a\u7684\u65b9\u6cd5\u5f02\u6b65\u6267\u884c\uff0c\u8017\u65f6\u5c11\u7684\u65b9\u6cd5\u540c\u6b65\u6267\u884c\u3002<\/p>\n
    \u901a\u8fc7\u4ee5\u4e0b\u6570\u636e\u53ef\u4ee5\u770b\u51fa\uff0c\u8017\u65f6\u662f\u5dee\u4e0d\u591a\u7684\uff0c\u4f46\u53ef\u4ee5\u8282\u7701\u4e0d\u5c11\u7ebf\u7a0b\u8d44\u6e90\u3002<\/p>\n
    \u603b\u7ed3<\/h3>\n
    CompletableFuture<\/code>\u63d0\u4f9b\u4e86\u4e00\u79cd\u4f18\u96c5\u800c\u5f3a\u5927\u7684\u65b9\u5f0f\u6765\u5904\u7406\u5e76\u53d1\u8bf7\u6c42\u548c\u4efb\u52a1\u3002\u7136\u800c\uff0c\u6b63\u5982\u5728\u5904\u7406\u9ad8\u5e76\u53d1\u65f6\u4f7f\u7528\u8fc7\u591a\u7684\u7ebf\u7a0b\u4f1a\u5bfc\u81f4\u8d44\u6e90\u6d6a\u8d39\u548c\u6548\u7387\u4e0b\u964d\u4e00\u6837\uff0c\u4f7f\u7528\u8fc7\u591a\u7684CompletableFuture<\/code>\u4e5f\u4f1a\u5bfc\u81f4\u540c\u6837\u7684\u95ee\u9898\u3002\u8fd9\u79cd\u73b0\u8c61\u88ab\u79f0\u4e3a \"\u7ebf\u7a0b\u8c03\u5ea6\u95ee\u9898\"\uff0c\u5b83\u4f1a\u5bfc\u81f4\u6027\u80fd\u4e0b\u964d\u548c\u541e\u5410\u91cf\u4e0b\u964d\uff08P99 \u503c\u8f83\u9ad8\uff09\u3002<\/p>\n
    \u56e0\u6b64\uff0c\u6211\u4eec\u9700\u8981\u5728\u4f7f\u7528CompletableFuture<\/code>\u65f6\u8003\u8651\u5b9e\u9645\u573a\u666f\u548c\u8d1f\u8f7d\u60c5\u51b5\uff0c\u5e76\u6839\u636e\u9700\u8981\u4f7f\u7528\u6070\u5f53\u7684\u6280\u672f\u6765\u4f18\u5316\u6027\u80fd\u3002<\/p>\n
    2. \u6700\u5c0f\u5316\u4e8b\u52a1\u8303\u56f4<\/h1>\n
    \u7b80\u8981\u8bf4\u660e<\/h3>\n
    \u9996\u5148\uff0c\u6211\u4eec\u9700\u8981\u660e\u786e\u7684\u662f\uff0c\u4e8b\u52a1\u7684\u5b58\u5728\u52bf\u5fc5\u4f1a\u5bf9\u6027\u80fd\u4ea7\u751f\u5f71\u54cd\uff0c\u7279\u522b\u662f\u5728\u9ad8\u5e76\u53d1\u7684\u60c5\u51b5\u4e0b\uff0c\u56e0\u4e3a\u9501\u7684\u7ade\u4e89\uff0c\u4f1a\u5e26\u6765\u6781\u5927\u7684\u6027\u80fd\u635f\u8017\u3002\u56e0\u6b64\uff0c\u5728\u5904\u7406\u6570\u636e\u4ea4\u4e92\u7684\u8fc7\u7a0b\u4e2d\uff0c\u6211\u4eec\u59cb\u7ec8\u575a\u6301\u5c3d\u53ef\u80fd\u5730\u51cf\u5c11\u4e8b\u52a1\u7684\u8303\u56f4\uff0c\u4ece\u800c\u63d0\u5347\u63a5\u53e3\u7684\u54cd\u5e94\u901f\u5ea6\u3002<\/p>\n
    \u4e00\u822c\u6765\u8bf4\uff0c\u6211\u4eec\u53ef\u4ee5\u5229\u7528@Transactional<\/code>\u6ce8\u89e3\u8f7b\u677e\u5b9e\u73b0\u4e8b\u52a1\u7684\u63a7\u5236\u3002\u4f46\u662f\uff0c\u7531\u4e8e@Transactional<\/code>\u6ce8\u89e3\u7684\u6700\u5c0f\u7c92\u5ea6\u4ec5\u9650\u4e8e\u65b9\u6cd5\u7ea7\u522b\uff0c\u56e0\u6b64\uff0c\u4e3a\u4e86\u66f4\u597d\u5730\u63a7\u5236\u4e8b\u52a1\u7684\u8303\u56f4\uff0c\u6211\u4eec\u9700\u8981\u901a\u8fc7\u7f16\u7a0b\u5f0f\u4e8b\u52a1\u6765\u5b9e\u73b0\u3002<\/p>\n
    \u5728\u7f16\u7a0b\u5f0f\u4e8b\u52a1\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u66f4\u7075\u6d3b\u5730\u63a7\u5236\u4e8b\u52a1\u7684\u5f00\u542f\u548c\u7ed3\u675f\uff0c\u4ee5\u53ca\u5bf9\u6570\u636e\u5e93\u64cd\u4f5c\u7684\u5904\u7406\u3002\u901a\u8fc7\u9002\u5f53\u7684\u8bbe\u7f6e\u4e8b\u52a1\u53c2\u6570\u548c\u64cd\u4f5c\u89c4\u5219\uff0c\u6211\u4eec\u53ef\u4ee5\u5b9e\u73b0\u4e8b\u52a1\u7684\u6700\u5c0f\u5316\uff0c\u4ece\u800c\u63d0\u5347\u7cfb\u7edf\u7684\u6027\u80fd\u548c\u53ef\u9760\u6027\u3002<\/p>\n
    \u7f16\u7a0b\u5f0f\u4e8b\u52a1\u6a21\u677f<\/h3>\n
    <\/span>public<\/span>interface<\/span>TransactionControlService<\/span>{\/***\u4e8b\u52a1\u5904\u7406**@param<\/span>objectLogicFunction\u4e1a\u52a1\u903b\u8f91*@param<\/span><T>resulttype*@return<\/span>\u5904\u7406\u7ed3\u679c*@throws<\/span>Exception\u4e1a\u52a1\u5f02\u5e38\u4fe1\u606f*\/<\/span><T>Texecute<\/span>(ObjectLogicFunction<T>objectLogicFunction)throws<\/span>Exception;\/***\u4e8b\u52a1\u5904\u7406**@param<\/span>voidLogicFunction\u4e1a\u52a1\u903b\u8f91*@throws<\/span>Exception\u4e1a\u52a1\u5f02\u5e38\u4fe1\u606f*\/<\/span>void<\/span>execute<\/span>(VoidLogicFunctionvoidLogicFunction)throws<\/span>Exception;}<\/code><\/pre>\n
    <\/span>@Service<\/span>public<\/span>class<\/span>TransactionControlServiceImpl<\/span>implements<\/span>TransactionControlService<\/span>{@Autowired<\/span>private<\/span>PlatformTransactionManagerplatformTransactionManager;@Autowired<\/span>private<\/span>TransactionDefinitiontransactionDefinition;\/***\u4e8b\u52a1\u5904\u7406**@param<\/span>businessLogic\u4e1a\u52a1\u903b\u8f91*@param<\/span><T>resulttype*@return<\/span>\u5904\u7406\u7ed3\u679c*@throws<\/span>Exception\u4e1a\u52a1\u5f02\u5e38\u4fe1\u606f*\/<\/span>@Override<\/span>public<\/span><T>Texecute<\/span>(ObjectLogicFunction<T>businessLogic)throws<\/span>Exception{TransactionStatus<\/span>transactionStatus<\/span>=platformTransactionManager.getTransaction(transactionDefinition);try<\/span>{T<\/span>resp<\/span>=businessLogic.logic();platformTransactionManager.commit(transactionStatus);return<\/span>resp;}catch<\/span>(Exceptione){platformTransactionManager.rollback(transactionStatus);throw<\/span>new<\/span>Exception<\/span>(e);}}\/***\u4e8b\u52a1\u5904\u7406**@param<\/span>businessLogic\u4e1a\u52a1\u903b\u8f91*\/<\/span>@Override<\/span>public<\/span>void<\/span>execute<\/span>(VoidLogicFunctionbusinessLogic)throws<\/span>Exception{TransactionStatus<\/span>transactionStatus<\/span>=platformTransactionManager.getTransaction(transactionDefinition);try<\/span>{businessLogic.logic();platformTransactionManager.commit(transactionStatus);}catch<\/span>(Exceptione){platformTransactionManager.rollback(transactionStatus);throw<\/span>new<\/span>Exception<\/span>(e);}}}<\/code><\/pre>\n
    <\/span>@FunctionalInterface<\/span>public<\/span>interface<\/span>ObjectLogicFunction<\/span><T>{\/***\u4e1a\u52a1\u903b\u8f91\u5904\u7406**@return<\/span>\u4e1a\u52a1\u5904\u7406\u7ed3\u679c*@throws<\/span>BusinessExceptione*\/<\/span>Tlogic<\/span>()throws<\/span>BusinessException;}<\/code><\/pre>\n
    <\/span>@FunctionalInterface<\/span>public<\/span>interface<\/span>VoidLogicFunction<\/span>{\/***\u4e1a\u52a1\u903b\u8f91\u5904\u7406**@throws<\/span>Exceptione*\/<\/span>void<\/span>logic<\/span>()throws<\/span>Exception;}<\/code><\/pre>\n
    <\/span>transactionControlService.execute(()->{\/\/\u628a\u9700\u8981\u4e8b\u52a1\u63a7\u5236\u7684\u4e1a\u52a1\u903b\u8f91\u5199\u5728\u8fd9\u91cc\u5373\u53ef<\/span>});<\/code><\/pre>\n
    3. \u7f13\u5b58<\/h1>\n
    \u7b80\u8981\u8bf4\u660e<\/h3>\n
    \u7f13\u5b58\uff0c\u8fd9\u4e00\u5728\u6027\u80fd\u63d0\u5347\u65b9\u9762\u582a\u79f0\u4e07\u91d1\u6cb9\u7684\u6280\u672f\u624b\u6bb5\uff0c\u5b83\u7684\u91cd\u8981\u6027\u5728\u5404\u79cd\u8ba1\u7b97\u673a\u5e94\u7528\u9886\u57df\u4e2d\u65e0\u53ef\u6bd4\u62df\u3002<\/p>\n
    \u7f13\u5b58\u4f5c\u4e3a\u4e00\u79cd\u9ad8\u6548\u7684\u6570\u636e\u8bfb\u53d6\u548c\u5199\u5165\u7684\u4f18\u5316\u65b9\u5f0f\uff0c\u88ab\u5e7f\u6cdb\u5e94\u7528\u4e8e\u5404\u79cd\u9886\u57df\uff0c\u5305\u62ec\u7535\u5546\u3001\u91d1\u878d\u3001\u6e38\u620f\u3001\u76f4\u64ad\u7b49\u3002<\/p>\n
    \u867d\u7136\u5728\u7f51\u7edc\u4e0a\u5173\u4e8e\u7f13\u5b58\u7684\u6587\u7ae0\u4e0d\u80dc\u679a\u4e3e\uff0c\u4f46\u8981\u60f3\u5145\u5206\u53d1\u6325\u7f13\u5b58\u7684\u4f5c\u7528\uff0c\u9700\u8981\u9488\u5bf9\u5177\u4f53\u7684\u4e1a\u52a1\u573a\u666f\u8fdb\u884c\u6df1\u5165\u5206\u6790\u548c\u63a2\u8ba8\u3002\u56e0\u6b64\uff0c\u5728\u672c\u8282\u4e2d\uff0c\u6211\u4eec\u5c06\u4e0d\u8fc7\u591a\u8d58\u8ff0\u7f13\u5b58\u7684\u5177\u4f53\u4f7f\u7528\u65b9\u6cd5\uff0c\u800c\u662f\u91cd\u70b9\u5217\u4e3e\u4e00\u4e9b\u4f7f\u7528\u7f13\u5b58\u65f6\u7684\u6ce8\u610f\u4e8b\u9879.<\/p>\n
    \u4f7f\u7528\u7f13\u5b58\u65f6\u7684\u6ce8\u610f\u4e8b\u9879<\/h4>\n
      \n
    • \n
      \u2022\u7f13\u5b58\u8fc7\u671f\u65f6\u95f4\uff1a<\/strong>\u8bbe\u7f6e\u5408\u9002\u7684\u8fc7\u671f\u65f6\u95f4\u53ef\u4ee5\u4fdd\u8bc1\u7f13\u5b58\u7684\u6709\u6548\u6027\uff0c\u4f46\u8fc7\u671f\u65f6\u95f4\u8fc7\u957f\u53ef\u80fd\u4f1a\u6d6a\u8d39\u5185\u5b58\u7a7a\u95f4\uff0c\u8fc7\u671f\u65f6\u95f4\u8fc7\u77ed\u53ef\u80fd\u4f1a\u5bfc\u81f4\u9891\u7e41\u5237\u65b0\u7f13\u5b58\uff0c\u5f71\u54cd\u6027\u80fd\u3002<\/p>\n<\/li>\n
    • \n
      \u2022\u7f13\u5b58\u4e00\u81f4\u6027\uff1a<\/strong>\u5982\u679c\u7f13\u5b58\u7684\u6570\u636e\u4e0e\u6570\u636e\u5e93\u4e2d\u7684\u6570\u636e\u4e0d\u4e00\u81f4\uff0c\u53ef\u80fd\u4f1a\u5bfc\u81f4\u4e1a\u52a1\u903b\u8f91\u51fa\u73b0\u95ee\u9898\u3002\u56e0\u6b64\uff0c\u5728\u4f7f\u7528\u7f13\u5b58\u65f6\u9700\u8981\u8003\u8651\u7f13\u5b58\u4e00\u81f4\u6027\u7684\u95ee\u9898\u3002<\/p>\n<\/li>\n
    • \n
      \u2022\u7f13\u5b58\u5bb9\u91cf\u9650\u5236\uff1a<\/strong>\u7f13\u5b58\u5bb9\u91cf\u6709\u9650\uff0c\u5982\u679c\u7f13\u5b58\u7684\u6570\u636e\u91cf\u8fc7\u5927\uff0c\u53ef\u80fd\u4f1a\u5bfc\u81f4\u5185\u5b58\u6ea2\u51fa\u6216\u8005\u7f13\u5b58\u9891\u7e41\u6e05\u7406\u3002\u56e0\u6b64\uff0c\u5728\u4f7f\u7528\u7f13\u5b58\u65f6\u9700\u8981\u6ce8\u610f\u7f13\u5b58\u5bb9\u91cf\u7684\u9650\u5236\u3002<\/p>\n<\/li>\n
    • \n
      \u2022\u7f13\u5b58\u9700\u8981\u8003\u8651\u8d1f\u8f7d\u5747\u8861\uff1a<\/strong>\u5728\u9ad8\u5e76\u53d1\u573a\u666f\u4e0b\uff0c\u9700\u8981\u8003\u8651\u7f13\u5b58\u7684\u8d1f\u8f7d\u5747\u8861\u95ee\u9898\uff0c\u907f\u514d\u67d0\u4e9b\u7f13\u5b58\u670d\u52a1\u5668\u56e0\u4e3a\u70ed\u70b9\u6570\u636e\u7b49\u95ee\u9898\u8d1f\u8f7d\u8fc7\u91cd\u5bfc\u81f4\u7cfb\u7edf\u5d29\u6e83\u6216\u8005\u54cd\u5e94\u53d8\u6162\u3002<\/p>\n<\/li>\n
    • \n
      \u2022\u7f13\u5b58\u9700\u8981\u8003\u8651\u5e76\u53d1\u8bfb\u5199\uff1a<\/strong>\u5f53\u591a\u4e2a\u7528\u6237\u540c\u65f6\u8bbf\u95ee\u7f13\u5b58\u65f6\uff0c\u9700\u8981\u8003\u8651\u5e76\u53d1\u8bfb\u5199\u7684\u95ee\u9898\uff0c\u907f\u514d\u7f13\u5b58\u51b2\u7a81\u548c\u6570\u636e\u4e00\u81f4\u6027\u95ee\u9898\u3002<\/p>\n<\/li>\n
    • \n
      \u2022\u7f13\u5b58\u7a7f\u900f\u95ee\u9898\uff1a<\/strong>\u5f53\u5927\u91cf\u7684\u67e5\u8be2\u8bf7\u6c42\u90fd\u65e0\u6cd5\u547d\u4e2d\u7f13\u5b58\u65f6\uff0c\u5bfc\u81f4\u6bcf\u6b21\u67e5\u8be2\u90fd\u4f1a\u843d\u5230\u6570\u636e\u5e93\u4e0a\uff0c\u4ece\u800c\u9020\u6210\u6570\u636e\u5e93\u538b\u529b\u8fc7\u5927\u3002<\/p>\n<\/li>\n
    • \n
      \u2022\u7f13\u5b58\u51fb\u7a7f\u95ee\u9898\uff1a<\/strong>\u5f53\u7f13\u5b58\u6570\u636e\u5931\u6548\u540e\uff0c\u5bfc\u81f4\u5927\u91cf\u7684\u8bf7\u6c42\u76f4\u63a5\u6253\u5230\u6570\u636e\u5e93\u4e2d\uff0c\u4ece\u800c\u9020\u6210\u6570\u636e\u5e93\u538b\u529b\u8fc7\u5927\u3002<\/p>\n<\/li>\n
    • \n
      \u2022\u67e5\u8be2\u65f6\u95f4\u590d\u6742\u5ea6\uff1a<\/strong>\u9700\u989d\u5916\u6ce8\u610f\u7f13\u5b58\u67e5\u8be2\u7684\u65f6\u95f4\u590d\u6742\u5ea6\u95ee\u9898\uff0c\u5982\u679c\u662f O(n)\uff0c\u751a\u81f3\u66f4\u5dee\u7684\u65f6\u95f4\u590d\u6742\u5ea6\uff0c\u5219\u4f1a\u56e0\u4e3a\u7f13\u5b58\u7684\u6570\u636e\u91cf\u589e\u52a0\u800c\u8ddf\u7740\u589e\u52a0\u3002<\/p>\n<\/li>\n<\/ul>\n
      \u8003\u8651\u5230\u8fd9\u4e9b\u95ee\u9898\u901a\u5e38\u4f18\u5316\u7684\u624b\u6bb5<\/h4>\n
        \n
      • \n
        \u2022\u6570\u636e\u538b\u7f29\uff1a<\/strong>\u9009\u62e9\u5408\u7406\u7684\u6570\u636e\u7c7b\u578b\uff0c\u4e3e\u4e2a\u4f8b\u5b50\uff1a\u5982\u679c\u7528Integer[]<\/code> \u548cint[]<\/code>\u6765\u6bd4\u8f83\uff0cInteger \u5360\u7528\u7684\u7a7a\u95f4\u5927\u7ea6\u662f int \u7684 4 \u500d\u3002\u5176\u4ed6\u60c5\u51b5\u4e0b\uff0c\u4f7f\u7528\u4e00\u4e9b\u5e38\u89c1\u6570\u636e\u7f16\u7801\u538b\u7f29\u6280\u672f\u4e5f\u662f\u5e38\u89c1\u7684\u8282\u7701\u5185\u5b58\u7684\u65b9\u5f0f\uff0c\u6bd4\u5982\uff1aBitMap\u3001\u5b57\u5178\u7f16\u7801\u7b49\u3002<\/p>\n<\/li>\n
      • \n
        \u2022\u9884\u52a0\u8f7d\uff1a<\/strong>\u5f53\u884c\u4e3a\u53ef\u9884\u6d4b\u65f6\uff0c\u90a3\u4e48\u63d0\u524d\u52a0\u8f7d\u4fbf\u53ef\u89e3\u51b3\u6784\u5efa\u7f13\u5b58\u65f6\u7684\u538b\u529b\u3002<\/p>\n<\/li>\n
      • \n
        \u2022\u70ed\u70b9\u6570\u636e\uff1a<\/strong>\u70ed\u70b9\u6570\u636e\u5982\u679c\u4e0d\u80fd\u6253\u6563\uff0c\u90a3\u4e48\u901a\u5e38\u5c31\u4f1a\u6784\u5efa\u591a\u7ea7\u7f13\u5b58\uff0c\u6bd4\u5982\u5c06\u5e94\u7528\u670d\u52a1\u8bbe\u4e3a\u4e00\u7ea7\u7f13\u5b58\uff0cRedis \u8bbe\u4e3a\u4e8c\u7ea7\u7f13\u5b58\uff0c\u4e00\u7ea7\u7f13\u5b58\uff0c\u7f13\u5b58\u5168\u91cf\u70ed\u70b9\u6570\u636e\uff0c\u4ece\u800c\u5b9e\u73b0\u538b\u529b\u5206\u644a\u3002<\/p>\n<\/li>\n
      • \n
        \u2022\u7f13\u5b58\u7a7f\u900f\u3001\u51fb\u7a7f\uff1a<\/strong>\u9488\u5bf9\u547d\u4e2d\u4e0d\u4e86\u7f13\u5b58\u7684\u67e5\u8be2\u4e5f\u53ef\u4ee5\u7f13\u5b58\u4e00\u4e2a\u989d\u5916\u7684\u6807\u8bc6\uff1b\u800c\u9488\u5bf9\u7f13\u5b58\u5931\u6548\uff0c\u8981\u4e48\u5c31\u5728\u5931\u6548\u524d\uff0c\u4e3b\u52a8\u5237\u65b0\u4e00\u6b21\uff0c\u8981\u4e48\u5c31\u5206\u6563\u5931\u6548\u65f6\u95f4\uff0c\u907f\u514d\u5927\u91cf\u7f13\u5b58\u540c\u65f6\u5931\u6548\u3002<\/p>\n<\/li>\n
      • \n
        \u2022\u65f6\u95f4\u590d\u6742\u5ea6\uff1a<\/strong>\u5728\u8bbe\u8ba1\u7f13\u5b58\u65f6\uff0c\u4f18\u5148\u8003\u8651\u9009\u62e9\u5e38\u6570\u7ea7\u7684\u65f6\u95f4\u590d\u6742\u5ea6\u7684\u65b9\u6cd5\u3002<\/p>\n<\/li>\n<\/ul>\n
        4. \u5408\u7406\u4f7f\u7528\u7ebf\u7a0b\u6c60<\/h1>\n
        \u7b80\u8981\u8bf4\u660e<\/h3>\n
        \u5728\u672c\u6587\u5f00\u59cb\u63d0\u5230\u7684\u4f7f\u7528CompletableFuture<\/code>\u5e76\u884c\u5904\u7406\u65f6\uff0c\u5b9e\u9645\u4e0a\u5c31\u5df2\u7ecf\u4f7f\u7528\u5230\u7ebf\u7a0b\u6c60\u4e86\uff0c\u6c60\u5316\u6280\u672f\u7684\u597d\u5904\uff0c\u6211\u60f3\u5e94\u8be5\u4e0d\u7528\u518d\u8fc7\u591a\u9610\u8ff0\u4e86\uff0c\u4f46\u5173\u4e8e\u7ebf\u7a0b\u6c60\u7684\u4f7f\u7528\u8fd8\u662f\u6709\u5f88\u591a\u6ce8\u610f\u70b9\u7684\u3002<\/p>\n
        \u4f7f\u7528\u573a\u666f<\/h3>\n
        \u5f02\u6b65\u4efb\u52a1<\/h4>\n
        \u7b80\u5355\u6765\u8bf4\u5c31\u662f\u67d0\u4e9b\u4e0d\u9700\u8981\u540c\u6b65\u8fd4\u56de\u4e1a\u52a1\u5904\u7406\u7ed3\u679c\u7684\u573a\u666f\uff0c\u6bd4\u5982\uff1a\u77ed\u4fe1\u3001\u90ae\u4ef6\u7b49\u901a\u77e5\u7c7b\u4e1a\u52a1\uff0c\u8bc4\u8bba\u3001\u70b9\u8d5e\u7b49\u4e92\u52a8\u6027\u4e1a\u52a1\u3002<\/p>\n
        \u5e76\u884c\u8ba1\u7b97<\/h4>\n
        \u5c31\u50cfMapReduce<\/code>\u4e00\u6837\uff0c\u5145\u5206\u5229\u7528\u591a\u7ebf\u7a0b\u7684\u5e76\u884c\u8ba1\u7b97\u80fd\u529b\uff0c\u5c06\u5927\u4efb\u52a1\u62c6\u5206\u4e3a\u591a\u4e2a\u5b50\u4efb\u52a1\uff0c\u6700\u540e\u518d\u5c06\u6240\u6709\u5b50\u4efb\u52a1\u8ba1\u7b97\u540e\u7684\u7ed3\u679c\u8fdb\u884c\u6c47\u603b\uff0cForkJoinPool<\/code>\u5c31\u662f JDK \u4e2d\u5178\u578b\u7684\u5e76\u884c\u8ba1\u7b97\u6846\u67b6\u3002<\/p>\n
        \u540c\u6b65\u4efb\u52a1<\/h4>\n
        \u524d\u9762\u8bb2\u5230\u7684CompletableFuture<\/code>\u4f7f\u7528\uff0c\u5c31\u662f\u5178\u578b\u7684\u540c\u6b65\u6539\u5f02\u6b65\u7684\u65b9\u5f0f\uff0c\u5982\u679c\u4efb\u52a1\u4e4b\u95f4\u6ca1\u6709\u4f9d\u8d56\uff0c\u90a3\u4e48\u5c31\u53ef\u4ee5\u5229\u7528\u7ebf\u7a0b\uff0c\u540c\u65f6\u8fdb\u884c\u5904\u7406\uff0c\u8fd9\u6837\u7406\u8bba\u4e0a\u5c31\u53ea\u9700\u8981\u7b49\u5f85\u8017\u65f6\u6700\u957f\u7684\u6b65\u9aa4\u7ed3\u675f\u5373\u53ef\uff08\u5b9e\u9645\u60c5\u51b5\u53ef\u53c2\u8003CompletableFuture<\/code>\u5206\u6790\uff09\u3002<\/p>\n
        \u7ebf\u7a0b\u6c60\u7684\u521b\u5efa<\/h3>\n
        \u4e0d\u8981\u76f4\u63a5\u4f7f\u7528Executors<\/code>\u521b\u5efa\u7ebf\u7a0b\u6c60\uff0c\u5e94\u901a\u8fc7ThreadPoolExecutor<\/code>\u7684\u65b9\u5f0f\uff0c\u4e3b\u52a8\u660e\u786e\u7ebf\u7a0b\u6c60\u7684\u53c2\u6570\uff0c\u907f\u514d\u4ea7\u751f\u610f\u5916\u3002<\/p>\n
        \u6bcf\u4e2a\u53c2\u6570\u90fd\u8981\u663e\u793a\u8bbe\u7f6e\uff0c\u4f8b\u5982\u50cf\u4e0b\u9762\u8fd9\u6837\uff1a<\/p>\n
        <\/span>private<\/span>static<\/span>final<\/span>ExecutorService<\/span>executor<\/span>=new<\/span>ThreadPoolExecutor<\/span>(2<\/span>,4<\/span>,1L<\/span>,TimeUnit.MINUTES,new<\/span>LinkedBlockingQueue<\/span><>(100<\/span>),new<\/span>ThreadFactoryBuilder<\/span>().setNameFormat(\"common-pool-%d\"<\/span>).build(),new<\/span>ThreadPoolExecutor<\/span>.CallerRunsPolicy());<\/code><\/pre>\n
        \u53c2\u6570\u7684\u914d\u7f6e\u5efa\u8bae<\/h3>\n
        CorePoolSize\uff08\u6838\u5fc3\u7ebf\u7a0b\u6570\uff09<\/h4>\n
        \u4e00\u822c\u5728\u914d\u7f6e\u6838\u5fc3\u7ebf\u7a0b\u6570\u7684\u65f6\u5019\uff0c\u662f\u9700\u8981\u7ed3\u5408\u7ebf\u7a0b\u6c60\u5c06\u8981\u5904\u7406\u4efb\u52a1\u7684\u7279\u6027\u6765\u51b3\u5b9a\u7684\uff0c\u800c\u4efb\u52a1\u7684\u6027\u8d28\u4e00\u822c\u53ef\u4ee5\u5212\u5206\u4e3a\uff1aCPU \u5bc6\u96c6\u578b\u3001I\/O \u5bc6\u96c6\u578b\u3002<\/p>\n
        \u6bd4\u8f83\u901a\u7528\u7684\u914d\u7f6e\u65b9\u5f0f\u5982\u4e0b<\/p>\n
          \n
        • \n
          \u2022CPU \u5bc6\u96c6\u578b\uff1a<\/strong>\u4e00\u822c\u5efa\u8bae\u7ebf\u7a0b\u7684\u6838\u5fc3\u6570\u4e0e CPU \u6838\u5fc3\u6570\u4fdd\u6301\u4e00\u81f4\u3002<\/p>\n<\/li>\n
        • \n
          \u2022I\/O \u5bc6\u96c6\u578b\uff1a<\/strong>\u4e00\u822c\u53ef\u4ee5\u8bbe\u7f6e 2 \u500d\u7684 CPU \u6838\u5fc3\u6570\u7684\u7ebf\u7a0b\u6570\uff0c\u56e0\u4e3a\u6b64\u7c7b\u4efb\u52a1 CPU \u6bd4\u8f83\u7a7a\u95f2\uff0c\u53ef\u4ee5\u591a\u5206\u914d\u70b9\u7ebf\u7a0b\u5145\u5206\u5229\u7528 CPU \u8d44\u6e90\u6765\u63d0\u9ad8\u6548\u7387\u3002<\/p>\n<\/li>\n<\/ul>\n
          \u901a\u8fc7Runtime.getRuntime().availableProcessors()<\/code>\u53ef\u4ee5\u83b7\u53d6\u6838\u5fc3\u7ebf\u7a0b\u6570\u3002<\/p>\n
          \u53e6\u5916\u8fd8\u6709\u4e00\u4e2a\u516c\u5f0f\u53ef\u4ee5\u501f\u9274<\/p>\n
            \n
          • \n
            \u2022\u7ebf\u7a0b\u6838\u5fc3\u6570 = cpu \u6838\u5fc3\u6570 \/ \uff081-\u963b\u585e\u7cfb\u6570\uff09<\/p>\n<\/li>\n
          • \n
            \u2022\u963b\u585e\u7cfb\u6570 = \u963b\u585e\u65f6\u95f4\uff0f\uff08\u963b\u585e\u65f6\u95f4+\u4f7f\u7528 CPU \u7684\u65f6\u95f4\uff09<\/p>\n<\/li>\n<\/ul>\n
            \u5b9e\u9645\u4e0a\u5927\u591a\u6570\u7ebf\u4e0a\u4e1a\u52a1\u6240\u6d88\u8017\u7684\u65f6\u95f4\u4e3b\u8981\u5c31\u662f I\/O \u7b49\u5f85\uff0c\u56e0\u6b64\u4e00\u822c\u7ebf\u7a0b\u6570\u90fd\u53ef\u4ee5\u8bbe\u7f6e\u7684\u591a\u4e00\u70b9\uff0c\u6bd4\u5982 tomcat \u4e2d\u9ed8\u8ba4\u7684\u7ebf\u7a0b\u6570\u5c31\u662f 200\uff0c\u6240\u4ee5\u6700\u4f73\u7684\u6838\u5fc3\u7ebf\u7a0b\u6570\u662f\u9700\u8981\u6839\u636e\u7279\u5b9a\u573a\u666f\uff0c\u7136\u540e\u901a\u8fc7\u5b9e\u9645\u4e0a\u7ebf\u4e0a\u5141\u8bb8\u7ed3\u679c\u5206\u6790\u540e\uff0c\u518d\u4e0d\u65ad\u7684\u8fdb\u884c\u8c03\u6574\u3002<\/p>\n
            MaximumPoolSize<\/h4>\n
            maximumPoolSize<\/code>\u7684\u8bbe\u7f6e\u4e5f\u662f\u770b\u5b9e\u9645\u5e94\u7528\u573a\u666f\uff0c\u5982\u679c\u8bbe\u7f6e\u7684\u548ccorePoolSize<\/code>\u4e00\u6837\uff0c\u90a3\u5c31\u5b8c\u5168\u4f9d\u9760\u963b\u585e\u961f\u5217\u548c\u62d2\u7edd\u7b56\u7565\u6765\u63a7\u5236\u4efb\u52a1\u7684\u5904\u7406\u60c5\u51b5\uff0c\u5982\u679c\u8bbe\u7f6e\u7684\u6bd4corePoolSize<\/code>\u7a0d\u5fae\u5927\u4e00\u70b9\uff0c\u90a3\u5c31\u53ef\u4ee5\u66f4\u597d\u7684\u5e94\u5bf9\u4e00\u4e9b\u6709\u7a81\u53d1\u6d41\u91cf\u4ea7\u751f\u7684\u573a\u666f\u3002<\/p>\n
            KeepAliveTime<\/h4>\n
            \u7531maximumPoolSize<\/code>\u521b\u5efa\u51fa\u6765\u7684\u7ebf\u7a0b\uff0c\u5728\u7ecf\u8fc7keepAliveTime<\/code>\u65f6\u95f4\u540e\u8fdb\u884c\u9500\u6bc1\uff0c\u4f9d\u636e\u7a81\u53d1\u6d41\u91cf\u6301\u7eed\u7684\u65f6\u95f4\u6765\u51b3\u5b9a\u3002<\/p>\n
            WorkQueue<\/h4>\n
            \u90a3\u4e48\u963b\u585e\u961f\u5217\u5e94\u8be5\u8bbe\u7f6e\u591a\u5927\u5462\uff1f\u6211\u4eec\u77e5\u9053\u5f53\u7ebf\u7a0b\u6c60\u4e2d\u6240\u6709\u7684\u7ebf\u7a0b\u90fd\u5728\u5de5\u4f5c\u65f6\uff0c\u5982\u679c\u518d\u6709\u4efb\u52a1\u8fdb\u6765\uff0c\u5c31\u4f1a\u88ab\u653e\u5230\u963b\u585e\u961f\u5217\u4e2d\u7b49\u5f85\uff0c\u5982\u679c\u963b\u585e\u961f\u5217\u8bbe\u7f6e\u7684\u592a\u5c0f\uff0c\u53ef\u80fd\u5f88\u5feb\u961f\u5217\u5c31\u6ee1\u4e86\uff0c\u5bfc\u81f4\u4efb\u52a1\u88ab\u4e22\u5f03\u6216\u8005\u5f02\u5e38\uff08\u7531\u62d2\u7edd\u7b56\u7565\u51b3\u5b9a\uff09\uff0c\u5982\u679c\u961f\u5217\u8bbe\u7f6e\u7684\u592a\u5927\uff0c\u53c8\u53ef\u80fd\u4f1a\u5e26\u6765\u5185\u5b58\u8d44\u6e90\u7684\u7d27\u5f20\uff0c\u751a\u81f3 OOM\uff0c\u4ee5\u53ca\u4efb\u52a1\u5ef6\u8fdf\u65f6\u95f4\u8fc7\u957f\u3002<\/p>\n
            \u6240\u4ee5\u963b\u585e\u961f\u5217\u7684\u5927\u5c0f\uff0c\u53c8\u662f\u8981\u7ed3\u5408\u5b9e\u9645\u573a\u666f\u6765\u8bbe\u7f6e\u7684\u3002<\/p>\n
            \u4e00\u822c\u4f1a\u6839\u636e\u5904\u7406\u4efb\u52a1\u7684\u901f\u5ea6\u4e0e\u4efb\u52a1\u4ea7\u751f\u7684\u901f\u5ea6\u8fdb\u884c\u8ba1\u7b97\u5f97\u5230\u4e00\u4e2a\u5927\u6982\u7684\u6570\u503c\u3002<\/p>\n
            \u5047\u8bbe\u73b0\u5728\u6709 1 \u4e2a\u7ebf\u7a0b\uff0c\u6bcf\u79d2\u949f\u53ef\u4ee5\u5904\u7406 10 \u4e2a\u4efb\u52a1\uff0c\u6b63\u5e38\u60c5\u51b5\u4e0b\u6bcf\u79d2\u949f\u4ea7\u751f\u7684\u4efb\u52a1\u6570\u5c0f\u4e8e 10\uff0c\u90a3\u4e48\u6b64\u65f6\u961f\u5217\u957f\u5ea6\u4e3a 10 \u5c31\u8db3\u4ee5\u3002<\/p>\n
            \u4f46\u662f\u5982\u679c\u9ad8\u5cf0\u65f6\u671f\uff0c\u6bcf\u79d2\u4ea7\u751f\u7684\u4efb\u52a1\u6570\u4f1a\u8fbe\u5230 20\uff0c\u4f1a\u6301\u7eed 10 \u79d2\uff0c\u4e14\u4efb\u52a1\u53c8\u4e0d\u5e0c\u671b\u4e22\u5f03\uff0c\u90a3\u4e48\u6b64\u65f6\u961f\u5217\u7684\u957f\u5ea6\u5c31\u9700\u8981\u8bbe\u7f6e\u5230 100\u3002<\/p>\n
            \n
            \u76d1\u63a7 workQueue \u4e2d\u7b49\u5f85\u4efb\u52a1\u7684\u6570\u91cf\u662f\u975e\u5e38\u91cd\u8981\u7684\uff0c\u53ea\u6709\u4e86\u89e3\u5b9e\u9645\u7684\u60c5\u51b5\uff0c\u624d\u80fd\u505a\u51fa\u6b63\u786e\u7684\u51b3\u5b9a\u3002<\/p>\n<\/blockquote>\n
            \n
            \u5728\u6709\u4e9b\u573a\u666f\u4e2d\uff0c\u53ef\u80fd\u5e76\u4e0d\u5e0c\u671b\u56e0\u4e3a\u4efb\u52a1\u88ab\u4e22\u8fdb\u963b\u585e\u961f\u5217\u800c\u7b49\u5f85\u592a\u957f\u7684\u65f6\u95f4\uff0c\u800c\u662f\u5e0c\u671b\u76f4\u63a5\u5f00\u542f\u8bbe\u7f6e\u7684MaximumPoolSize<\/code>\u7ebf\u7a0b\u6c60\u6570\u6765\u6267\u884c\u4efb\u52a1\uff0c\u8fd9\u79cd\u60c5\u51b5\u4e0b\u4e00\u822c\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528SynchronousQueue<\/code>\u961f\u5217\u6765\u5b9e\u73b0<\/p>\n<\/blockquote>\n
            ThreadFactory<\/h4>\n
            \u901a\u8fc7 threadFactory \u6211\u4eec\u53ef\u4ee5\u81ea\u5b9a\u4e49\u7ebf\u7a0b\u7ec4\u7684\u540d\u5b57\uff0c\u8bbe\u7f6e\u5408\u7406\u7684\u540d\u79f0\u5c06\u6709\u5229\u4e8e\u4f60\u7ebf\u4e0a\u8fdb\u884c\u95ee\u9898\u6392\u67e5\u3002<\/p>\n
            Handler<\/h4>\n
            \u6700\u540e\u62d2\u7edd\u7b56\u7565\uff0c\u8fd9\u4e5f\u662f\u8981\u7ed3\u5408\u5b9e\u9645\u7684\u4e1a\u52a1\u573a\u666f\u6765\u51b3\u5b9a\u91c7\u7528\u4ec0\u4e48\u6837\u7684\u62d2\u7edd\u65b9\u5f0f\uff0c\u4f8b\u5982\u50cf\u8fc7\u7a0b\u7c7b\u7684\u6570\u636e\uff0c\u53ef\u4ee5\u76f4\u63a5\u91c7\u7528DiscardOldestPolicy<\/code>\u7b56\u7565\u3002<\/p>\n
            \u7ebf\u7a0b\u6c60\u7684\u76d1\u63a7<\/h3>\n
            \u7ebf\u4e0a\u4f7f\u7528\u7ebf\u7a0b\u6c60\u65f6\uff0c\u4e00\u5b9a\u8981\u505a\u597d\u76d1\u63a7\uff0c\u4ee5\u4fbf\u6839\u636e\u5b9e\u9645\u8fd0\u884c\u60c5\u51b5\u8fdb\u884c\u8c03\u6574\uff0c\u5e38\u89c1\u7684\u76d1\u63a7\u65b9\u5f0f\u53ef\u4ee5\u901a\u8fc7\u7ebf\u7a0b\u6c60\u63d0\u4f9b\u7684 API\uff0c\u7136\u540e\u66b4\u9732\u7ed9 Metrics \u6765\u5b8c\u6210\u5b9e\u65f6\u6570\u636e\u7edf\u8ba1\u3002<\/p>\n
            \u76d1\u63a7\u793a\u4f8b<\/h4>\n
            \u7ebf\u7a0b\u6c60\u81ea\u8eab\u63d0\u4f9b\u7684\u7edf\u8ba1\u6570\u636e<\/p>\n
            <\/span>public<\/span>class<\/span>ThreadPoolMonitor<\/span>{private<\/span>final<\/span>static<\/span>Logger<\/span>log<\/span>=LoggerFactory.getLogger(ThreadPoolMonitor.class);private<\/span>static<\/span>final<\/span>ThreadPoolExecutor<\/span>threadPool<\/span>=new<\/span>ThreadPoolExecutor<\/span>(2<\/span>,4<\/span>,0<\/span>,TimeUnit.SECONDS,new<\/span>LinkedBlockingQueue<\/span><>(100<\/span>),new<\/span>ThreadFactoryBuilder<\/span>().setNameFormat(\"my_thread_pool_%d\"<\/span>).build());public<\/span>static<\/span>void<\/span>main<\/span>(String[]args){log.info(\"PoolSize:\"<\/span>+threadPool.getPoolSize());log.info(\"ActiveThreadCount:\"<\/span>+threadPool.getActiveCount());log.info(\"TaskQueueSize:\"<\/span>+threadPool.getQueue().size());log.info(\"CompletedTaskCount:\"<\/span>+threadPool.getCompletedTaskCount());}}<\/code><\/pre>\n
            \u901a\u8fc7 micrometer API \u5b8c\u6210\u7edf\u8ba1\uff0c\u8fd9\u6837\u5c31\u53ef\u4ee5\u63a5\u5165Prometheus<\/code>\u4e86<\/p>\n
            <\/span>package<\/span>com.springboot.micrometer.monitor;import<\/span>com.google.common.util.concurrent.ThreadFactoryBuilder;import<\/span>io.micrometer.core.instrument.Metrics;import<\/span>org.springframework.stereotype.Component;import<\/span>javax.annotation.PostConstruct;import<\/span>java.util.concurrent.Executors;import<\/span>java.util.concurrent.LinkedBlockingQueue;import<\/span>java.util.concurrent.ThreadPoolExecutor;import<\/span>java.util.concurrent.TimeUnit;import<\/span>java.util.concurrent.atomic.AtomicLong;import<\/span>java.util.stream.IntStream;@Component<\/span>public<\/span>class<\/span>ThreadPoolMonitor<\/span>{private<\/span>static<\/span>final<\/span>ThreadPoolExecutor<\/span>threadPool<\/span>=new<\/span>ThreadPoolExecutor<\/span>(4<\/span>,8<\/span>,0<\/span>,TimeUnit.SECONDS,new<\/span>LinkedBlockingQueue<\/span><>(100<\/span>),new<\/span>ThreadFactoryBuilder<\/span>().setNameFormat(\"my_thread_pool_%d\"<\/span>).build(),new<\/span>ThreadPoolExecutor<\/span>.DiscardOldestPolicy());\/***\u6d3b\u8dc3\u7ebf\u7a0b\u6570*\/<\/span>private<\/span>AtomicLong<\/span>activeThreadCount<\/span>=new<\/span>AtomicLong<\/span>(0<\/span>);\/***\u961f\u5217\u4efb\u52a1\u6570*\/<\/span>private<\/span>AtomicLong<\/span>taskQueueSize<\/span>=new<\/span>AtomicLong<\/span>(0<\/span>);\/***\u5b8c\u6210\u4efb\u52a1\u6570*\/<\/span>private<\/span>AtomicLong<\/span>completedTaskCount<\/span>=new<\/span>AtomicLong<\/span>(0<\/span>);\/***\u7ebf\u7a0b\u6c60\u4e2d\u5f53\u524d\u7ebf\u7a0b\u7684\u6570\u91cf*\/<\/span>private<\/span>AtomicLong<\/span>poolSize<\/span>=new<\/span>AtomicLong<\/span>(0<\/span>);@PostConstruct<\/span>private<\/span>void<\/span>init<\/span>(){\/***\u901a\u8fc7micrometerAPI\u5b8c\u6210\u7edf\u8ba1** gauge\u6700\u5178\u578b\u7684\u4f7f\u7528\u573a\u666f\u5c31\u662f\u7edf\u8ba1\uff1alist\u3001Map\u3001\u7ebf\u7a0b\u6c60\u3001\u8fde\u63a5\u6c60\u7b49\u96c6\u5408\u7c7b\u578b\u7684\u6570\u636e*\/<\/span>Metrics.gauge(\"my_thread_pool_active_thread_count\"<\/span>,activeThreadCount);Metrics.gauge(\"my_thread_pool_task_queue_size\"<\/span>,taskQueueSize);Metrics.gauge(\"my_thread_pool_completed_task_count\"<\/span>,completedTaskCount);Metrics.gauge(\"my_thread_pool_size\"<\/span>,poolSize);\/\/\u6a21\u62df\u7ebf\u7a0b\u6c60\u7684\u4f7f\u7528<\/span>new<\/span>Thread<\/span>(this<\/span>::runTask).start();}private<\/span>void<\/span>runTask<\/span>(){\/\/\u6bcf5\u79d2\u76d1\u63a7\u4e00\u6b21\u7ebf\u7a0b\u6c60\u7684\u4f7f\u7528\u60c5\u51b5<\/span>monitorThreadPoolState();\/\/\u6a21\u62df\u4efb\u52a1\u6267\u884c<\/span>IntStream.rangeClosed(0<\/span>,500<\/span>).forEach(i->{\/\/\u6bcf500\u6beb\u79d2\uff0c\u6267\u884c\u4e00\u4e2a\u4efb\u52a1<\/span>try<\/span>{TimeUnit.MILLISECONDS.sleep(500<\/span>);}catch<\/span>(InterruptedExceptione){e.printStackTrace();}\/\/\u6bcf\u4e2a\u5904\u7406\u4e00\u4e2a\u4efb\u52a1\u8017\u65f65\u79d2<\/span>threadPool.submit(()->{try<\/span>{TimeUnit.MILLISECONDS.sleep(5000<\/span>);}catch<\/span>(InterruptedExceptione){e.printStackTrace();}});});}private<\/span>void<\/span>monitorThreadPoolState<\/span>(){Executors.newSingleThreadScheduledExecutor().scheduleAtFixedRate(()->{activeThreadCount.set(threadPool.getActiveCount());taskQueueSize.set(threadPool.getQueue().size());poolSize.set(threadPool.getPoolSize());completedTaskCount.set(threadPool.getCompletedTaskCount());},0<\/span>,5<\/span>,TimeUnit.SECONDS);}}<\/code><\/pre>\n
            \u7ebf\u7a0b\u6c60\u7684\u8d44\u6e90\u9694\u79bb<\/h3>\n
            \u5728\u751f\u4ea7\u73af\u5883\u4e2d\uff0c\u4e00\u5b9a\u8981\u6ce8\u610f\u597d\u8d44\u6e90\u9694\u79bb\u7684\u95ee\u9898\uff0c\u5c3d\u91cf\u4e0d\u8981\u5c06\u4e0d\u540c\u7c7b\u578b\uff0c\u4e0d\u540c\u91cd\u8981\u7b49\u7ea7\u7684\u4efb\u52a1\u653e\u5165\u4e00\u4e2a\u7ebf\u7a0b\u6c60\u4e2d\uff0c\u4ee5\u514d\u56e0\u4e3a\u7ebf\u7a0b\u8d44\u6e90\u4e89\u62a2\u800c\u4e92\u76f8\u5f71\u54cd\u3002<\/p>\n
            5. \u670d\u52a1\u9884\u70ed<\/h1>\n
            \u670d\u52a1\u9884\u70ed\u4e5f\u662f\u5f88\u5e38\u89c1\u7684\u4e00\u79cd\u4f18\u5316\u624b\u6bb5\uff0c\u4f8b\u5982\u6570\u636e\u5e93\u8fde\u63a5\u3001\u7ebf\u7a0b\u6c60\u4e2d\u7684\u6838\u5fc3\u7ebf\u7a0b\uff0c\u7f13\u5b58\u7b49\u4fe1\u606f\u53ef\u4ee5\u5229\u7528\u670d\u52a1\u542f\u52a8\u9636\u6bb5\u9884\u5148\u52a0\u8f7d\uff0c\u4ece\u800c\u907f\u514d\u8bf7\u6c42\u5230\u6765\u540e\u4e34\u65f6\u6784\u5efa\u7684\u8017\u65f6\u3002<\/p>\n
            \u4e0b\u9762\u63d0\u4f9b\u4e00\u4e9b\u9884\u52a0\u8f7d\u7684\u65b9\u5f0f<\/p>\n
            \u7ebf\u7a0b\u6c60<\/h3>\n
            \u7ebf\u7a0b\u6c60\u672c\u8eab\u63d0\u4f9b\u4e86\u76f8\u5173\u7684 API\uff1aprestartAllCoreThreads()<\/code>\u901a\u8fc7\u8be5\u65b9\u6cd5\u53ef\u4ee5\u63d0\u524d\u5c06\u6838\u5fc3\u7ebf\u7a0b\u521b\u5efa\u597d\uff0c\u975e\u5e38\u65b9\u4fbf\u3002<\/p>\n
            Web \u670d\u52a1<\/h3>\n
            \u5e38\u89c1\u7684\u5982 Tomcat\uff0c\u5176\u672c\u8eab\u4e5f\u7528\u5230\u4e86\u7ebf\u7a0b\u6c60\uff0c\u53ea\u662f\u5176\u81ea\u8eab\u5df2\u7ecf\u8003\u8651\u5230\u4e86\u9884\u52a0\u8f7d\u7684\u95ee\u9898\uff0c\u4e0d\u9700\u8981\u6211\u4eec\u989d\u5916\u5904\u7406\u4e86\u3002<\/p>\n