{"id":99825,"date":"2026-09-03T11:41:10","date_gmt":"2026-09-03T03:41:10","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/99825.html"},"modified":"2026-09-03T11:41:10","modified_gmt":"2026-09-03T03:41:10","slug":"completefuture-vs-completablefuture%ef%bc%9anetty%e4%b8%ba%e4%bd%95%e8%87%aa%e7%a0%94future","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/99825.html","title":{"rendered":"CompleteFuture VS CompletableFuture\uff1aNetty\u4e3a\u4f55\u81ea\u7814Future"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/09\/20260903034104-6a98ec50d40ca.jpg\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<\/p>\n<h4>\u6587\u7ae0\u76ee\u5f55<\/h4>\n<ul>\n<li>\n<ul>\n<li>\u4e00\u3001\u6982\u5ff5\u6f84\u6e05&#xff1a;CompleteFuture \u2260 CompletableFuture<\/li>\n<li>\u4e8c\u3001\u6838\u5fc3\u7ef4\u5ea6\u5bf9\u6bd4&#xff1a;\u4ece\u8bfb\u5199\u5206\u79bb\u5230\u7ebf\u7a0b\u6a21\u578b<\/li>\n<li>\u4e09\u3001\u539f\u56e0\u4e00&#xff1a;EventLoop \u7ebf\u7a0b\u4eb2\u548c\u6027&#xff08;\u6700\u6838\u5fc3\u539f\u56e0&#xff09;<\/li>\n<li>\u56db\u3001\u539f\u56e0\u4e8c&#xff1a;\u6b7b\u9501\u9632\u62a4\u673a\u5236<\/li>\n<li>\u4e94\u3001\u539f\u56e0\u4e09&#xff1a;\u8bfb\u5199\u5206\u79bb\u7684 API \u8bbe\u8ba1<\/li>\n<li>\u516d\u3001\u539f\u56e0\u56db&#xff1a;\u5386\u53f2\u539f\u56e0\u4e0e\u751f\u6001\u9002\u914d<\/li>\n<li>\u4e03\u3001\u539f\u56e0\u4e94&#xff1a;\u6027\u80fd\u4f18\u5316 &#043; \u8f7b\u91cf\u5316<\/li>\n<li>\u516b\u3001\u539f\u56e0\u516d&#xff1a;ChannelFuture \u7684 I\/O \u4e0a\u4e0b\u6587\u6269\u5c55<\/li>\n<li>\u5168\u6587\u5c0f\u7ed3<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<hr \/>\n<p>Java \u5f00\u53d1\u8005\u5bf9 CompletableFuture \u80af\u5b9a\u4e0d\u964c\u751f&#xff0c;\u5b83\u662f JDK 8 \u5f15\u5165\u7684\u5f02\u6b65\u7f16\u6392\u5229\u5668&#xff0c;\u652f\u6301 thenApply\u3001thenCompose\u3001allOf \u7b49\u4e30\u5bcc\u7684\u94fe\u5f0f\u7ec4\u5408 API\u3002\u800c\u5728 Netty \u7684 io.netty.util.concurrent \u5305\u4e0b&#xff0c;\u4e5f\u6709\u4e00\u5957\u81ea\u7814\u7684 Future\/Promise \u4f53\u7cfb&#xff0c;\u751a\u81f3\u8fd8\u6709\u4e00\u4e2a\u540d\u4e3a CompleteFuture \u7684\u7c7b\u3002\u521d\u5b66\u8005\u5f88\u5bb9\u6613\u5c06 Netty \u7684 CompleteFuture \u4e0e Java \u7684 CompletableFuture \u6df7\u4e3a\u4e00\u8c08&#xff0c;\u4f46\u5b83\u4eec\u5176\u5b9e\u662f\u5728\u5b8c\u5168\u4e0d\u540c\u5c42\u9762\u89e3\u51b3\u4e0d\u540c\u95ee\u9898\u7684\u4e1c\u897f\u3002\u7406\u89e3\u4e24\u8005\u7684\u533a\u522b&#xff0c;\u4ee5\u53ca Netty \u4e3a\u4ec0\u4e48\u8981&#034;\u91cd\u590d\u9020\u8f6e\u5b50&#034;&#xff0c;\u662f\u6df1\u5165 Netty \u5f02\u6b65\u7f16\u7a0b\u6a21\u578b\u7684\u5173\u952e\u4e00\u6b65\u3002<\/p>\n<p>\u4ee5\u4e0b\u95ee\u9898\u6784\u6210\u4e86\u7406\u89e3\u4e24\u8005\u5dee\u5f02\u7684\u6838\u5fc3\u7ebf\u7d22&#xff1a;<\/p>\n<ul>\n<li>\n<p>Netty \u7684 CompleteFuture \u548c Java \u7684 CompletableFuture \u662f\u540c\u4e00\u4e2a\u4e1c\u897f\u5417&#xff1f;\u5982\u679c\u4e0d\u662f&#xff0c;CompleteFuture \u5230\u5e95\u662f\u4ec0\u4e48&#xff1f;<\/p>\n<\/li>\n<li>\n<p>Netty \u7684 Future\/Promise \u4f53\u7cfb\u4e0e Java CompletableFuture \u5728\u7ebf\u7a0b\u6a21\u578b\u3001\u56de\u8c03\u673a\u5236\u3001\u9519\u8bef\u5904\u7406\u4e0a\u6709\u4f55\u672c\u8d28\u533a\u522b&#xff1f;<\/p>\n<\/li>\n<li>\n<p>\u4e3a\u4ec0\u4e48 Netty \u4e0d\u76f4\u63a5\u7528 CompletableFuture&#xff0c;\u800c\u8981\u81ea\u7814\u4e00\u6574\u5957 Future \u4f53\u7cfb&#xff1f;\u80cc\u540e\u7684\u67b6\u6784\u7ea6\u675f\u662f\u4ec0\u4e48&#xff1f;<\/p>\n<\/li>\n<li>\n<p>Netty \u81ea\u7814 Future \u7684\u516d\u4e2a\u539f\u56e0\u4e2d&#xff0c;\u54ea\u4e00\u4e2a\u662f\u6700\u6838\u5fc3\u7684&#xff0c;\u4e3a\u4ec0\u4e48&#xff1f;<\/p>\n<\/li>\n<\/ul>\n<p>\u672c\u6587\u5148\u6f84\u6e05\u6982\u5ff5\u6df7\u6dc6&#xff08;CompleteFuture \u2260 CompletableFuture&#xff09;&#xff0c;\u518d\u4ece\u4e5d\u4e2a\u7ef4\u5ea6\u505a\u6838\u5fc3\u5bf9\u6bd4&#xff0c;\u7136\u540e\u9010\u4e00\u5256\u6790 Netty \u81ea\u7814 Future \u4f53\u7cfb\u7684\u516d\u4e2a\u539f\u56e0&#xff0c;\u6cbf\u7740&#034;\u6982\u5ff5\u6f84\u6e05 \u2192 \u7ef4\u5ea6\u5bf9\u6bd4 \u2192 \u539f\u56e0\u6df1\u6316 \u2192 \u5168\u666f\u603b\u7ed3&#034;\u7684\u9012\u8fdb\u903b\u8f91&#xff0c;\u7528\u6e90\u7801\u5f15\u7528\u548c\u56fe\u793a\u8bb2\u900f\u4e24\u8005\u7684\u5dee\u5f02\u4e0e Netty \u7684\u8bbe\u8ba1\u52a8\u673a\u3002<\/p>\n<h3>\u4e00\u3001\u6982\u5ff5\u6f84\u6e05&#xff1a;CompleteFuture \u2260 CompletableFuture<\/h3>\n<p>\u6700\u5bb9\u6613\u6df7\u6dc6\u7684\u70b9\u5728\u4e8e\u540d\u5b57\u3002Netty \u7684 CompleteFuture \u5e76\u4e0d\u662f Java CompletableFuture \u7684\u5bf9\u6807\u7269&#xff0c;\u4e24\u8005\u7684\u8bbe\u8ba1\u76ee\u6807\u5b8c\u5168\u4e0d\u540c\u3002<\/p>\n<p>Netty \u7684 CompleteFuture \u662f\u4e00\u4e2a\u62bd\u8c61\u9aa8\u67b6\u7c7b&#xff0c;\u8868\u793a&#034;\u5df2\u7ecf\u5b8c\u6210\u7684 Future&#034;\u3002\u5b83\u7684\u6240\u6709\u65b9\u6cd5\u90fd\u662f\u8f7b\u91cf\u77ed\u8def\u5b9e\u73b0&#xff1a;await() \u76f4\u63a5\u8fd4\u56de this \u4e0d\u963b\u585e\u3001isDone() \u6c38\u8fdc\u8fd4\u56de true\u3001cancel() \u6c38\u8fdc\u8fd4\u56de false\u3002\u5b83\u6709\u4e24\u4e2a\u5177\u4f53\u5b50\u7c7b&#xff1a;SucceededFuture&#xff08;\u5df2\u7ecf\u6210\u529f\u7684\u4e0d\u53ef\u53d8 Future&#xff09;\u548c FailedFuture&#xff08;\u5df2\u7ecf\u5931\u8d25\u7684\u4e0d\u53ef\u53d8 Future&#xff09;\u3002<\/p>\n<p>\u5b83\u5b58\u5728\u7684\u76ee\u7684\u5f88\u660e\u786e&#xff1a;\u5f53 I\/O \u64cd\u4f5c&#034;\u7acb\u523b\u5c31\u5df2\u5b8c\u6210&#034;\u65f6&#xff08;\u5982\u5411\u5df2\u5173\u95ed\u7684 Channel \u5199\u6570\u636e&#xff09;&#xff0c;\u4e0d\u9700\u8981\u8d70 DefaultPromise \u90a3\u5957 CAS \u52a0 synchronized \u52a0 wait\/notifyAll \u7684\u91cd\u903b\u8f91&#xff0c;\u7528 SucceededFuture \u6216 FailedFuture \u5373\u53ef\u96f6\u5f00\u9500\u8fd4\u56de\u3002<\/p>\n<p>\u800c Java \u7684 CompletableFuture \u662f JDK 8 \u5f15\u5165\u7684\u901a\u7528\u5f02\u6b65\u7f16\u6392\u539f\u8bed&#xff0c;\u5185\u90e8\u7ef4\u62a4 Completion \u94fe\u8868&#xff0c;\u652f\u6301\u4e30\u5bcc\u7684\u94fe\u5f0f\u7ec4\u5408 API&#xff0c;\u53ef\u4ee5\u5728\u4efb\u610f\u7ebf\u7a0b\u4e0a\u5b8c\u6210\u548c\u6ce8\u518c\u56de\u8c03\u3002<\/p>\n<p>\u4e00\u53e5\u8bdd\u533a\u5206&#xff1a;CompleteFuture \u662f&#034;\u5df2\u5b8c\u6210\u6001\u7684\u8f7b\u91cf\u5feb\u7167&#034;&#xff0c;CompletableFuture \u662f&#034;\u53ef\u7f16\u6392\u7684\u5f02\u6b65\u6d41\u7a0b\u56fe&#034;\u3002<\/p>\n<p>CompleteFuture \u5728 Netty \u7684 Future\/Promise \u7c7b\u7ee7\u627f\u4f53\u7cfb\u4e2d\u7684\u4f4d\u7f6e\u5982\u4e0b\u56fe\u6240\u793a&#xff1a;<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/09\/20260903034106-6a98ec525d2a0.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<p>\u4ece\u56fe\u4e2d\u53ef\u4ee5\u770b\u5230&#xff0c;CompleteFuture \u548c DefaultPromise \u662f AbstractFuture \u7684\u4e24\u6761\u5e76\u884c\u5206\u652f\u3002DefaultPromise \u662f\u53ef\u53d8\u7684\u3001\u5f02\u6b65\u5b8c\u6210\u7684\u5b9e\u73b0&#xff0c;\u627f\u8f7d\u4e86 Netty \u5f02\u6b65 I\/O \u7684\u6838\u5fc3\u903b\u8f91&#xff1b;CompleteFuture \u662f\u4e0d\u53ef\u53d8\u7684\u3001\u5df2\u5b8c\u6210\u7684\u8f7b\u91cf\u5b9e\u73b0&#xff0c;\u4e13\u95e8\u5904\u7406&#034;\u7acb\u523b\u5c31\u5b8c\u6210&#034;\u7684\u573a\u666f\u3002<\/p>\n<p>\u4ee5\u4e0b\u662f CompleteFuture \u7684\u6838\u5fc3\u6e90\u7801&#xff1a;<\/p>\n<p><span class=\"token class-name\"><span class=\"token namespace\">io<span class=\"token punctuation\">.<\/span>netty<span class=\"token punctuation\">.<\/span>util<span class=\"token punctuation\">.<\/span>concurrent<span class=\"token punctuation\">.<\/span><\/span>CompleteFuture<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u62bd\u8c61\u9aa8\u67b6\u7c7b&#xff1a;\u8868\u793a\u5df2\u7ecf\u5b8c\u6210\u7684 Future<\/span><br \/>\n<span class=\"token keyword\">public<\/span> <span class=\"token keyword\">abstract<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">CompleteFuture<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">V<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> <span class=\"token keyword\">extends<\/span> <span class=\"token class-name\">AbstractFuture<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">V<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> <span class=\"token punctuation\">{<\/span><\/p>\n<p>    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">final<\/span> <span class=\"token class-name\">EventExecutor<\/span> executor<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token annotation punctuation\">&#064;Override<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">boolean<\/span> <span class=\"token function\">isDone<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">true<\/span><span class=\"token punctuation\">;<\/span>    <span class=\"token comment\">\/\/ \u6c38\u8fdc\u5df2\u5b8c\u6210<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token annotation punctuation\">&#064;Override<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">boolean<\/span> <span class=\"token function\">isCancellable<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">false<\/span><span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/\/ \u4e0d\u53ef\u53d6\u6d88<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token annotation punctuation\">&#064;Override<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">Future<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">V<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> <span class=\"token function\">await<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">throws<\/span> <span class=\"token class-name\">InterruptedException<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token class-name\">Thread<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">interrupted<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token keyword\">throw<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">InterruptedException<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/\/ \u76f4\u63a5\u8fd4\u56de&#xff0c;\u4e0d\u963b\u585e<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token annotation punctuation\">&#064;Override<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">Future<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">V<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> <span class=\"token function\">sync<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">throws<\/span> <span class=\"token class-name\">InterruptedException<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/\/ \u76f4\u63a5\u8fd4\u56de&#xff0c;\u4e0d\u963b\u585e<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token annotation punctuation\">&#064;Override<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">boolean<\/span> <span class=\"token function\">cancel<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">boolean<\/span> mayInterruptIfRunning<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">false<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u4e0d\u53ef\u53d6\u6d88<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u518d\u770b\u5b83\u7684\u6210\u529f\u5b50\u7c7b SucceededFuture&#xff1a;<\/p>\n<p><span class=\"token class-name\"><span class=\"token namespace\">io<span class=\"token punctuation\">.<\/span>netty<span class=\"token punctuation\">.<\/span>util<span class=\"token punctuation\">.<\/span>concurrent<span class=\"token punctuation\">.<\/span><\/span>SucceededFuture<\/span><\/p>\n<p><span class=\"token comment\">\/\/ CompleteFuture \u7684\u6210\u529f\u5b50\u7c7b&#xff1a;\u4e0d\u53ef\u53d8&#xff0c;\u96f6\u540c\u6b65\u5f00\u9500<\/span><br \/>\n<span class=\"token keyword\">public<\/span> <span class=\"token keyword\">final<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">SucceededFuture<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">V<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> <span class=\"token keyword\">extends<\/span> <span class=\"token class-name\">CompleteFuture<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">V<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">final<\/span> <span class=\"token class-name\">V<\/span> result<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token annotation punctuation\">&#064;Override<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">boolean<\/span> <span class=\"token function\">isSuccess<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">true<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token annotation punctuation\">&#064;Override<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">V<\/span> <span class=\"token function\">getNow<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> result<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u6ca1\u6709 CAS&#xff0c;\u6ca1\u6709 synchronized&#xff0c;\u6ca1\u6709 wait\/notifyAll&#xff0c;\u8fde volatile \u5b57\u6bb5\u90fd\u4e0d\u9700\u8981\u3002\u8fd9\u5c31\u662f&#034;\u5df2\u5b8c\u6210\u6001\u8f7b\u91cf\u5feb\u7167&#034;\u7684\u6781\u81f4\u4f53\u73b0\u3002<\/p>\n<h3>\u4e8c\u3001\u6838\u5fc3\u7ef4\u5ea6\u5bf9\u6bd4&#xff1a;\u4ece\u8bfb\u5199\u5206\u79bb\u5230\u7ebf\u7a0b\u6a21\u578b<\/h3>\n<p>\u7406\u89e3\u4e86 CompleteFuture \u7684\u771f\u5b9e\u5b9a\u4f4d\u540e&#xff0c;\u63a5\u4e0b\u6765\u5c06 Netty \u7684 Future\/Promise \u4f53\u7cfb\u4e0e Java CompletableFuture \u5728\u4e5d\u4e2a\u7ef4\u5ea6\u4e0a\u505a\u7cfb\u7edf\u5bf9\u6bd4\u3002<\/p>\n<table>\n<tr>\u7ef4\u5ea6Java CompletableFutureNetty Future\/Promise<\/tr>\n<tbody>\n<tr>\n<td>\u8bfb\u5199\u5206\u79bb<\/td>\n<td>\u5355\u7c7b\u517c\u987e\u8bfb &#043; \u5199<\/td>\n<td>Future&#xff08;\u53ea\u8bfb&#xff09;&#043; Promise&#xff08;\u53ef\u5199&#xff09;&#xff0c;\u804c\u8d23\u5206\u79bb<\/td>\n<\/tr>\n<tr>\n<td>\u56de\u8c03\u7ebf\u7a0b<\/td>\n<td>\u65e0\u7ebf\u7a0b\u4eb2\u548c\u6027&#xff0c;\u56de\u8c03\u8dd1\u5728\u5b8c\u6210\u7ebf\u7a0b\u6216 ForkJoinPool<\/td>\n<td>\u56de\u8c03\u59cb\u7ec8\u5728\u7ed1\u5b9a\u7684 EventExecutor \u4e0a\u6267\u884c<\/td>\n<\/tr>\n<tr>\n<td>\u6b7b\u9501\u68c0\u6d4b<\/td>\n<td>\u65e0<\/td>\n<td>checkDeadLock()&#xff1a;EventLoop \u5185 await() \u629b BlockingOperationException<\/td>\n<\/tr>\n<tr>\n<td>\u5b8c\u6210\u901a\u77e5<\/td>\n<td>whenComplete \u7b49\u7ec4\u5408 API<\/td>\n<td>addListener(GenericFutureListener) \u4e8b\u4ef6\u76d1\u542c\u5668<\/td>\n<\/tr>\n<tr>\n<td>\u6808\u6ea2\u51fa\u4fdd\u62a4<\/td>\n<td>\u65e0\u663e\u5f0f\u6df1\u5ea6\u9650\u5236<\/td>\n<td>MAX_LISTENER_STACK_DEPTH &#061; 8&#xff0c;\u8d85\u9608\u503c\u8f6c task<\/td>\n<\/tr>\n<tr>\n<td>\u8f7b\u91cf\u5df2\u5b8c\u6210\u6001<\/td>\n<td>\u65e0\u4e13\u95e8\u4f18\u5316<\/td>\n<td>SucceededFuture \/ FailedFuture&#xff08;\u96f6\u540c\u6b65\u5f00\u9500&#xff09;<\/td>\n<\/tr>\n<tr>\n<td>\u5931\u8d25\u8bed\u4e49<\/td>\n<td>CompletionException \u5305\u88c5<\/td>\n<td>cause() \u76f4\u63a5\u8fd4\u56de Throwable&#xff0c;sync() \u91cd\u629b<\/td>\n<\/tr>\n<tr>\n<td>\u7ec4\u5408\u80fd\u529b<\/td>\n<td>\u4e30\u5bcc&#xff08;thenApply\u3001thenCompose \u7b49&#xff09;<\/td>\n<td>\u8f83\u5f31&#xff0c;\u6709 PromiseCombiner \/ PromiseAggregator<\/td>\n<\/tr>\n<tr>\n<td>\u5e95\u5c42\u540c\u6b65<\/td>\n<td>volatile &#043; CAS &#043; Completion \u94fe\u8868<\/td>\n<td>AtomicReferenceFieldUpdater CAS &#043; synchronized &#043; wait\/notifyAll<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u8fd9\u5f20\u8868\u662f\u5168\u6587\u7684&#034;\u5730\u56fe&#034;\u3002\u540e\u7eed\u516d\u4e2a\u7ae0\u8282\u5c06\u9010\u4e00\u5c55\u5f00\u5176\u4e2d\u6700\u5173\u952e\u7684\u5dee\u5f02\u7ef4\u5ea6&#xff0c;\u5256\u6790 Netty \u505a\u51fa\u8fd9\u4e9b\u8bbe\u8ba1\u9009\u62e9\u7684\u539f\u56e0\u3002<\/p>\n<h3>\u4e09\u3001\u539f\u56e0\u4e00&#xff1a;EventLoop \u7ebf\u7a0b\u4eb2\u548c\u6027&#xff08;\u6700\u6838\u5fc3\u539f\u56e0&#xff09;<\/h3>\n<p>\u8fd9\u662f\u516d\u4e2a\u539f\u56e0\u4e2d\u6700\u6838\u5fc3\u7684\u4e00\u4e2a\u3002Netty \u6574\u4e2a I\/O \u67b6\u6784\u5efa\u7acb\u5728\u4e00\u4e2a\u94c1\u5f8b\u4e0a&#xff1a;\u6bcf\u4e2a Channel \u7684\u6240\u6709 I\/O \u64cd\u4f5c\u548c\u56de\u8c03\u90fd\u5fc5\u987b\u5728\u540c\u4e00\u4e2a EventLoop \u7ebf\u7a0b\u4e0a\u6267\u884c\u3002\u8fd9\u662f Netty \u65e0\u9501\u5316\u7684\u57fa\u7840&#xff0c;\u5982\u679c\u56de\u8c03\u8dd1\u5728\u9519\u8bef\u7684\u7ebf\u7a0b\u4e0a&#xff0c;\u6574\u4e2a\u65e0\u9501\u5316\u4f53\u7cfb\u5c31\u4f1a\u5d29\u6e83\u3002<\/p>\n<p>DefaultPromise \u6301\u6709 EventExecutor \u5f15\u7528&#xff0c;\u5728\u76d1\u542c\u5668\u901a\u77e5\u65f6\u5148\u5224\u65ad executor.inEventLoop()&#xff1a;\u5982\u679c\u5f53\u524d\u5c31\u662f EventLoop \u7ebf\u7a0b&#xff0c;\u76f4\u63a5\u540c\u6b65\u56de\u8c03&#xff08;\u4f46\u6709\u6808\u6df1\u5ea6\u4fdd\u62a4&#xff09;&#xff1b;\u5982\u679c\u4e0d\u662f&#xff0c;\u901a\u8fc7 safeExecute(executor, task) \u63d0\u4ea4\u4e3a task \u5f02\u6b65\u6267\u884c\u3002\u65e0\u8bba\u54ea\u4e2a\u7ebf\u7a0b\u8c03\u7528 setSuccess()&#xff0c;\u76d1\u542c\u5668\u6700\u7ec8\u90fd\u8dd1\u5728\u7ed1\u5b9a\u7684 EventLoop \u7ebf\u7a0b\u4e0a\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/09\/20260903034107-6a98ec532673f.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<p>\u65f6\u5e8f\u56fe\u5c55\u793a\u4e86\u5173\u952e\u7684\u8def\u7531\u903b\u8f91&#xff1a;Thread-2 \u8c03\u7528 setSuccess() \u5b8c\u6210 Promise&#xff0c;\u4f46\u76d1\u542c\u5668 L \u7684 operationComplete() \u6700\u7ec8\u5728 EventLoop Thread \u4e0a\u6267\u884c\u3002CompletableFuture \u505a\u4e0d\u5230\u8fd9\u4e00\u70b9&#xff0c;\u5b83\u4e0d\u77e5\u9053 EventLoop \u662f\u4ec0\u4e48&#xff0c;\u56de\u8c03\u53ef\u80fd\u5728\u5b8c\u6210\u64cd\u4f5c\u7684\u4efb\u610f\u7ebf\u7a0b\u4e0a\u6267\u884c\u3002<\/p>\n<p>\u4ee5\u4e0b\u662f notifyListeners() \u7684\u6e90\u7801&#xff1a;<\/p>\n<p><span class=\"token class-name\"><span class=\"token namespace\">io<span class=\"token punctuation\">.<\/span>netty<span class=\"token punctuation\">.<\/span>util<span class=\"token punctuation\">.<\/span>concurrent<span class=\"token punctuation\">.<\/span><\/span>DefaultPromise<\/span>#notifyListeners<\/p>\n<p><span class=\"token keyword\">private<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">notifyListeners<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token class-name\">EventExecutor<\/span> executor <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">executor<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>executor<span class=\"token punctuation\">.<\/span><span class=\"token function\">inEventLoop<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u5f53\u524d\u5c31\u662f EventLoop \u7ebf\u7a0b&#xff1a;\u68c0\u67e5\u6808\u6df1\u5ea6<\/span><br \/>\n        <span class=\"token keyword\">final<\/span> <span class=\"token class-name\">InternalThreadLocalMap<\/span> threadLocals <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">InternalThreadLocalMap<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">final<\/span> <span class=\"token keyword\">int<\/span> stackDepth <span class=\"token operator\">&#061;<\/span> threadLocals<span class=\"token punctuation\">.<\/span><span class=\"token function\">futureListenerStackDepth<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>stackDepth <span class=\"token operator\">&lt;<\/span> <span class=\"token constant\">MAX_LISTENER_STACK_DEPTH<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>    <span class=\"token comment\">\/\/ \u9608\u503c &#061; 8<\/span><br \/>\n            threadLocals<span class=\"token punctuation\">.<\/span><span class=\"token function\">setFutureListenerStackDepth<\/span><span class=\"token punctuation\">(<\/span>stackDepth <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">try<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                <span class=\"token function\">notifyListenersNow<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>    <span class=\"token comment\">\/\/ \u540c\u6b65\u76f4\u63a5\u56de\u8c03<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">finally<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                threadLocals<span class=\"token punctuation\">.<\/span><span class=\"token function\">setFutureListenerStackDepth<\/span><span class=\"token punctuation\">(<\/span>stackDepth<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n            <span class=\"token keyword\">return<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token comment\">\/\/ \u4e0d\u5728 EventLoop \u7ebf\u7a0b \u6216 \u8d85\u8fc7\u6808\u6df1\u5ea6&#xff1a;\u63d0\u4ea4\u4e3a task \u5f02\u6b65\u6267\u884c<\/span><br \/>\n    <span class=\"token function\">safeExecute<\/span><span class=\"token punctuation\">(<\/span>executor<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">Runnable<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token annotation punctuation\">&#064;Override<\/span><br \/>\n        <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">run<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token function\">notifyListenersNow<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u6ce8\u610f\u8fd9\u91cc\u7684\u4e24\u6761\u8def\u5f84&#xff1a;inEventLoop() \u4e3a true \u4e14\u6808\u6df1\u5ea6\u672a\u8d85\u9608\u503c\u65f6&#xff0c;\u76f4\u63a5\u540c\u6b65\u56de\u8c03&#xff1b;\u5426\u5219\u901a\u8fc7 safeExecute \u63d0\u4ea4\u5230 executor \u5f02\u6b65\u6267\u884c\u3002safeExecute \u7684\u5b9e\u73b0\u5f88\u7b80\u5355&#xff1a;<\/p>\n<p><span class=\"token class-name\"><span class=\"token namespace\">io<span class=\"token punctuation\">.<\/span>netty<span class=\"token punctuation\">.<\/span>util<span class=\"token punctuation\">.<\/span>concurrent<span class=\"token punctuation\">.<\/span><\/span>DefaultPromise<\/span>#safeExecute<\/p>\n<p><span class=\"token comment\">\/\/ \u65e0\u8bba\u54ea\u4e2a\u7ebf\u7a0b\u5b8c\u6210 Promise&#xff0c;\u76d1\u542c\u5668\u6700\u7ec8\u90fd\u8dd1\u5728\u7ed1\u5b9a\u7684 EventLoop \u7ebf\u7a0b\u4e0a<\/span><br \/>\n<span class=\"token keyword\">private<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">safeExecute<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">EventExecutor<\/span> executor<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">Runnable<\/span> task<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">try<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        executor<span class=\"token punctuation\">.<\/span><span class=\"token function\">execute<\/span><span class=\"token punctuation\">(<\/span>task<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">catch<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token class-name\">Throwable<\/span> t<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        rejectedExecutionLogger<span class=\"token punctuation\">.<\/span><span class=\"token function\">error<\/span><span class=\"token punctuation\">(<\/span><br \/>\n            <span class=\"token string\">&#034;Failed to submit a listener notification task. Event loop shut down?&#034;<\/span><span class=\"token punctuation\">,<\/span> t<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>executor.execute(task) \u5c06\u4efb\u52a1\u63d0\u4ea4\u5230 EventLoop \u7684\u4efb\u52a1\u961f\u5217&#xff0c;\u7531 EventLoop \u7ebf\u7a0b\u5728\u4e0b\u4e00\u8f6e\u4e8b\u4ef6\u5faa\u73af\u4e2d\u6267\u884c\u3002\u8fd9\u5c31\u662f\u7ebf\u7a0b\u4eb2\u548c\u6027\u7684\u4fdd\u969c\u673a\u5236&#xff1a;\u4e0d\u662f&#034;\u8c01\u5b8c\u6210\u8c01\u56de\u8c03&#034;&#xff0c;\u800c\u662f&#034;\u8c01\u7ed1\u5b9a\u8c01\u56de\u8c03&#034;\u3002<\/p>\n<p>Netty \u7684\u7ebf\u7a0b\u5b89\u5168\u6a21\u578b\u4f9d\u8d56&#034;\u540c\u4e00\u7ebf\u7a0b\u4e32\u884c\u6267\u884c&#034;\u7684\u7ea6\u675f&#xff0c;\u800c\u975e\u9501\u3002\u5982\u679c\u4f7f\u7528 CompletableFuture&#xff0c;\u56de\u8c03\u53ef\u80fd\u8dd1\u5728\u8c03\u7528 complete() \u7684\u7ebf\u7a0b\u4e0a&#xff0c;\u4e5f\u53ef\u80fd\u8dd1\u5728 ForkJoinPool \u4e0a&#xff0c;\u8fd9\u4f1a\u7834\u574f Channel \u64cd\u4f5c\u7684\u5355\u7ebf\u7a0b\u7ea6\u675f&#xff0c;\u5bfc\u81f4\u7ade\u6001\u6761\u4ef6\u3002<\/p>\n<h3>\u56db\u3001\u539f\u56e0\u4e8c&#xff1a;\u6b7b\u9501\u9632\u62a4\u673a\u5236<\/h3>\n<p>\u8003\u8651\u8fd9\u6837\u4e00\u4e2a\u573a\u666f&#xff1a;\u4e1a\u52a1\u4ee3\u7801\u5728 ChannelHandler \u4e2d&#xff08;\u5373 EventLoop \u7ebf\u7a0b\u4e0a&#xff09;\u8c03\u7528\u4e86 future.await() \u963b\u585e\u7b49\u5f85\u4e00\u4e2a I\/O \u64cd\u4f5c\u5b8c\u6210\u3002\u800c\u8fd9\u4e2a I\/O \u64cd\u4f5c\u7684\u5b8c\u6210\u64cd\u4f5c\u6070\u597d\u9700\u8981\u540c\u4e00\u4e2a EventLoop \u7ebf\u7a0b\u6765\u6267\u884c&#xff0c;\u6bd4\u5982 setSuccess() \u9700\u8981\u901a\u8fc7 EventLoop \u7684 execute() \u63d0\u4ea4\u3002\u6b64\u65f6 EventLoop \u7ebf\u7a0b\u88ab await() \u963b\u585e\u4e86&#xff0c;\u65e0\u6cd5\u6267\u884c setSuccess() \u7684 task&#xff0c;\u5f62\u6210\u6c38\u4e45\u6b7b\u9501\u3002<\/p>\n<p>Netty \u5728 await() \u5165\u53e3\u76f4\u63a5\u62e6\u622a\u4e86\u8fd9\u79cd\u60c5\u51b5\u3002checkDeadLock() \u68c0\u6d4b\u5f53\u524d\u7ebf\u7a0b\u662f\u5426\u4e3a\u7ed1\u5b9a\u7684 EventLoop \u7ebf\u7a0b&#xff0c;\u5982\u679c\u662f\u5219\u629b\u51fa BlockingOperationException&#xff1a;<\/p>\n<p><span class=\"token class-name\"><span class=\"token namespace\">io<span class=\"token punctuation\">.<\/span>netty<span class=\"token punctuation\">.<\/span>util<span class=\"token punctuation\">.<\/span>concurrent<span class=\"token punctuation\">.<\/span><\/span>DefaultPromise<\/span>#await<\/p>\n<p><span class=\"token annotation punctuation\">&#064;Override<\/span><br \/>\n<span class=\"token keyword\">public<\/span> <span class=\"token class-name\">Promise<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">V<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> <span class=\"token function\">await<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">throws<\/span> <span class=\"token class-name\">InterruptedException<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token function\">isDone<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token class-name\">Thread<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">interrupted<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">throw<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">InterruptedException<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">toString<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token function\">checkDeadLock<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>    <span class=\"token comment\">\/\/ \u6b7b\u9501\u68c0\u6d4b&#xff1a;EventLoop \u7ebf\u7a0b\u5185\u8c03 await() \u76f4\u63a5\u629b\u5f02\u5e38<\/span><br \/>\n    <span class=\"token keyword\">synchronized<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">this<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span><span class=\"token function\">isDone<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token function\">incWaiters<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">try<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                <span class=\"token function\">wait<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>           <span class=\"token comment\">\/\/ \u5229\u7528 Object.wait() \u963b\u585e\u7b49\u5f85<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">finally<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                <span class=\"token function\">decWaiters<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token class-name\"><span class=\"token namespace\">io<span class=\"token punctuation\">.<\/span>netty<span class=\"token punctuation\">.<\/span>util<span class=\"token punctuation\">.<\/span>concurrent<span class=\"token punctuation\">.<\/span><\/span>DefaultPromise<\/span>#checkDeadLock<\/p>\n<p><span class=\"token keyword\">protected<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">checkDeadLock<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token class-name\">EventExecutor<\/span> e <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">executor<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>e <span class=\"token operator\">!&#061;<\/span> <span class=\"token keyword\">null<\/span> <span class=\"token operator\">&amp;&amp;<\/span> e<span class=\"token punctuation\">.<\/span><span class=\"token function\">inEventLoop<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u5f53\u524d\u7ebf\u7a0b\u5c31\u662f\u7ed1\u5b9a\u7684 EventLoop \u7ebf\u7a0b&#xff0c;\u963b\u585e\u7b49\u5f85\u4f1a\u5bfc\u81f4\u6b7b\u9501<\/span><br \/>\n        <span class=\"token keyword\">throw<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">BlockingOperationException<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">toString<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>awaitUninterruptibly() \u548c await0()&#xff08;\u8d85\u65f6\u7248&#xff09;\u540c\u6837\u8c03\u7528 checkDeadLock()&#xff0c;\u786e\u4fdd\u6240\u6709\u963b\u585e\u8def\u5f84\u90fd\u6709\u6b7b\u9501\u9632\u62a4\u3002<\/p>\n<p>\u503c\u5f97\u6ce8\u610f\u7684\u662f&#xff0c;DefaultChannelPromise \u8fd8\u5bf9 checkDeadLock() \u505a\u4e86\u8fdb\u4e00\u6b65\u5b9a\u5236&#xff1a;<\/p>\n<p><span class=\"token class-name\"><span class=\"token namespace\">io<span class=\"token punctuation\">.<\/span>netty<span class=\"token punctuation\">.<\/span>channel<span class=\"token punctuation\">.<\/span><\/span>DefaultChannelPromise<\/span>#checkDeadLock<\/p>\n<p><span class=\"token annotation punctuation\">&#064;Override<\/span><br \/>\n<span class=\"token keyword\">protected<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">checkDeadLock<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token function\">channel<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">isRegistered<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">super<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">checkDeadLock<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>    <span class=\"token comment\">\/\/ \u53ea\u6709 Channel \u5df2\u6ce8\u518c\u65f6\u624d\u68c0\u6d4b<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>Channel \u672a\u6ce8\u518c\u65f6&#xff0c;EventLoop \u53ef\u80fd\u5c1a\u672a\u5206\u914d&#xff0c;\u6b64\u65f6\u4e0d\u68c0\u6d4b\u6b7b\u9501\u3002\u4e00\u65e6 Channel \u6ce8\u518c\u5230 EventLoop&#xff0c;\u6b7b\u9501\u68c0\u6d4b\u7acb\u5373\u751f\u6548\u3002<\/p>\n<p>\u8fd9\u4e2a\u9632\u62a4\u7684\u672c\u8d28\u5728\u4e8e&#xff1a;Netty \u7684 Future \u4e0e EventLoop \u5f3a\u7ed1\u5b9a&#xff0c;\u77e5\u9053&#034;\u8c01\u5e94\u8be5\u6765\u5b8c\u6210\u81ea\u5df1&#034;&#xff0c;\u56e0\u6b64\u80fd\u9884\u5224\u6b7b\u9501\u3002\u800c CompletableFuture \u4e0d\u77e5\u9053\u5b8c\u6210\u8005\u662f\u8c01&#xff0c;\u65e0\u6cd5\u9884\u5224&#xff0c;\u4f60\u53ef\u4ee5\u5728\u4efb\u610f\u7ebf\u7a0b\u8c03 get()&#xff0c;\u6b7b\u9501\u4e86\u53ea\u80fd\u81ea\u5df1\u6392\u67e5\u3002<\/p>\n<h3>\u4e94\u3001\u539f\u56e0\u4e09&#xff1a;\u8bfb\u5199\u5206\u79bb\u7684 API \u8bbe\u8ba1<\/h3>\n<p>Netty \u628a Future \u62c6\u6210\u4e24\u5c42&#xff1a;Future&lt;V&gt; \u662f\u53ea\u8bfb\u63a5\u53e3&#xff0c;Promise&lt;V&gt; extends Future&lt;V&gt; \u662f\u53ef\u5199\u63a5\u53e3\u3002\u8fd9\u79cd\u8bfb\u5199\u5206\u79bb\u4e0d\u662f\u5076\u7136&#xff0c;\u800c\u662f\u7cbe\u5fc3\u8bbe\u8ba1\u7684 API \u7ea6\u675f\u3002<\/p>\n<p>Future \u7684\u53ea\u8bfb API \u5305\u62ec&#xff1a;isSuccess()\u3001cause()\u3001addListener()\u3001await()\u3001getNow()\u3001sync()\u3002Promise \u5728\u6b64\u57fa\u7840\u4e0a\u6269\u5c55\u4e86\u5199\u64cd\u4f5c&#xff1a;setSuccess(V)\u3001trySuccess(V)\u3001setFailure(Throwable)\u3001tryFailure(Throwable)\u3001setUncancellable()\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/09\/20260903034108-6a98ec5433d4d.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<p>\u4ece\u56fe\u4e2d\u53ef\u4ee5\u770b\u5230&#xff0c;DefaultChannelPromise \u540c\u65f6\u5b9e\u73b0\u4e86 ChannelFuture&#xff08;\u53ea\u8bfb&#xff09;\u548c ChannelPromise&#xff08;\u53ef\u5199&#xff09;\u4e24\u4e2a\u63a5\u53e3\u3002\u4f46\u5728\u5b9e\u9645\u4f7f\u7528\u4e2d&#xff0c;\u4e1a\u52a1\u4ee3\u7801\u62ff\u5230\u7684\u662f ChannelFuture \u63a5\u53e3\u5f15\u7528&#xff0c;\u6ca1\u6709 setSuccess \u65b9\u6cd5&#xff1b;EventLoop \u5185\u90e8\u6301\u6709\u7684\u662f ChannelPromise \u63a5\u53e3\u5f15\u7528&#xff0c;\u53ef\u4ee5\u8bbe\u7f6e\u7ed3\u679c\u3002API \u5c42\u9762\u5c31\u963b\u6b62\u4e86\u4e1a\u52a1\u4ee3\u7801\u8d8a\u6743\u8bbe\u7f6e\u7ed3\u679c\u3002<\/p>\n<p>setSuccess \u548c trySuccess \u7684\u533a\u522b\u4e5f\u5f88\u660e\u786e&#xff1a;<\/p>\n<p><span class=\"token class-name\"><span class=\"token namespace\">io<span class=\"token punctuation\">.<\/span>netty<span class=\"token punctuation\">.<\/span>util<span class=\"token punctuation\">.<\/span>concurrent<span class=\"token punctuation\">.<\/span><\/span>Promise<\/span><\/p>\n<p><span class=\"token comment\">\/\/ Promise \u5728 Future \u57fa\u7840\u4e0a\u6269\u5c55\u4e86\u5199\u64cd\u4f5c<\/span><br \/>\n<span class=\"token keyword\">public<\/span> <span class=\"token keyword\">interface<\/span> <span class=\"token class-name\">Promise<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">V<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> <span class=\"token keyword\">extends<\/span> <span class=\"token class-name\">Future<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">V<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token class-name\">Promise<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">V<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> <span class=\"token function\">setSuccess<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">V<\/span> result<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>       <span class=\"token comment\">\/\/ \u5df2\u5b8c\u6210\u65f6\u629b IllegalStateException<\/span><br \/>\n    <span class=\"token keyword\">boolean<\/span> <span class=\"token function\">trySuccess<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">V<\/span> result<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>          <span class=\"token comment\">\/\/ \u5df2\u5b8c\u6210\u65f6\u8fd4\u56de false<\/span><br \/>\n    <span class=\"token class-name\">Promise<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">V<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> <span class=\"token function\">setFailure<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">Throwable<\/span> cause<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">boolean<\/span> <span class=\"token function\">tryFailure<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">Throwable<\/span> cause<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">boolean<\/span> <span class=\"token function\">setUncancellable<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>setSuccess \u5728 Promise \u5df2\u5b8c\u6210\u65f6\u629b\u51fa IllegalStateException&#xff0c;\u9002\u7528\u4e8e&#034;\u8c03\u7528\u8005\u786e\u4fe1\u81ea\u5df1\u6709\u6743\u5b8c\u6210&#034;\u7684\u573a\u666f&#xff1b;trySuccess \u5728\u5df2\u5b8c\u6210\u65f6\u9759\u9ed8\u8fd4\u56de false&#xff0c;\u9002\u7528\u4e8e&#034;\u7ade\u6001\u6761\u4ef6\u4e0b\u5c1d\u8bd5\u5b8c\u6210&#034;\u7684\u573a\u666f\u3002<\/p>\n<p>\u5bf9\u6bd4\u4e4b\u4e0b&#xff0c;CompletableFuture \u662f\u8bfb\u5199\u4e00\u4f53\u7684&#xff0c;\u4efb\u4f55\u6301\u6709\u5f15\u7528\u7684\u4ee3\u7801\u90fd\u53ef\u4ee5\u8c03\u7528 complete() \u8bbe\u7f6e\u7ed3\u679c&#xff0c;\u6ca1\u6709\u8fd9\u79cd\u7ea6\u675f\u3002\u8fd9\u79cd\u8bbe\u8ba1\u54f2\u5b66\u7c7b\u4f3c Scala \u7684 Future&#xff08;\u53ea\u8bfb&#xff09;\u4e0e Promise&#xff08;\u53ef\u5199&#xff09;\u5206\u79bb\u6a21\u5f0f&#xff0c;\u901a\u8fc7\u7c7b\u578b\u7cfb\u7edf\u5728\u7f16\u8bd1\u671f\u7ea6\u675f\u64cd\u4f5c\u6743\u9650\u3002<\/p>\n<h3>\u516d\u3001\u539f\u56e0\u56db&#xff1a;\u5386\u53f2\u539f\u56e0\u4e0e\u751f\u6001\u9002\u914d<\/h3>\n<p>Netty \u7684 Future\/Promise \u4f53\u7cfb\u4ece Netty 3&#xff08;2008\u5e74&#xff09;\u5c31\u5df2\u5b58\u5728&#xff0c;\u8fdc\u65e9\u4e8e JDK 8&#xff08;2014\u5e74&#xff09;\u5f15\u5165\u7684 CompletableFuture\u3002\u5373\u4f7f\u662f Netty 4.0.0.Final \u4e5f\u5728 2013\u5e747\u670816\u65e5\u53d1\u5e03&#xff0c;\u6bd4 JDK 8 GA&#xff08;2014\u5e743\u670818\u65e5&#xff09;\u65e9\u4e86 8 \u4e2a\u6708\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/09\/20260903034108-6a98ec54c247e.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<p>\u5728 JDK 8 \u4e4b\u524d&#xff0c;JDK \u53ea\u6709 java.util.concurrent.Future&#xff0c;\u5b83\u53ea\u80fd\u963b\u585e\u5f0f get()&#xff0c;\u6ca1\u6709\u56de\u8c03\u3001\u6ca1\u6709\u76d1\u542c\u5668\u3001\u6ca1\u6709\u7ec4\u5408\u80fd\u529b\u3002Netty \u9700\u8981\u975e\u963b\u585e\u7684 I\/O \u5b8c\u6210\u901a\u77e5\u673a\u5236&#xff0c;JDK \u6ca1\u6709\u63d0\u4f9b&#xff0c;\u53ea\u80fd\u81ea\u7814\u3002<\/p>\n<p>\u5373\u4f7f JDK 8 \u5f15\u5165\u4e86 CompletableFuture&#xff0c;Netty \u4e5f\u6ca1\u6709\u5207\u6362&#xff0c;\u56e0\u4e3a\u524d\u9762\u4e09\u4e2a\u539f\u56e0&#xff08;\u7ebf\u7a0b\u4eb2\u548c\u6027\u3001\u6b7b\u9501\u9632\u62a4\u3001\u8bfb\u5199\u5206\u79bb&#xff09;\u662f CompletableFuture \u65e0\u6cd5\u6ee1\u8db3\u7684\u67b6\u6784\u7ea6\u675f\u3002\u8fd9\u662f\u4e00\u4e2a&#034;\u5148\u6709\u9700\u6c42\u81ea\u7814&#xff0c;\u540e\u6709 JDK \u6807\u51c6\u4f46\u65e0\u6cd5\u66ff\u6362&#034;\u7684\u5178\u578b\u6848\u4f8b\u3002\u5386\u53f2\u539f\u56e0\u89e3\u91ca\u4e86 Netty \u4e3a\u4ec0\u4e48\u6700\u521d\u81ea\u7814&#xff0c;\u800c\u67b6\u6784\u7ea6\u675f\u89e3\u91ca\u4e86\u4e3a\u4ec0\u4e48\u81f3\u4eca\u4e0d\u6362\u3002<\/p>\n<h3>\u4e03\u3001\u539f\u56e0\u4e94&#xff1a;\u6027\u80fd\u4f18\u5316 &#043; \u8f7b\u91cf\u5316<\/h3>\n<p>Netty \u5728\u81ea\u7814 Future \u4f53\u7cfb\u4e0a\u505a\u4e86\u591a\u9879\u6027\u80fd\u4f18\u5316&#xff0c;\u8fd9\u4e9b\u662f CompletableFuture \u4e0d\u5177\u5907\u7684\u3002<\/p>\n<p>CAS \u65e0\u9501\u8def\u5f84\u3002DefaultPromise \u4f7f\u7528 AtomicReferenceFieldUpdater CAS \u8bbe\u7f6e volatile Object result \u5b57\u6bb5&#xff0c;\u53ea\u6709\u5199\u7ed3\u679c\u65f6\u624d\u9700\u8981 CAS&#xff0c;\u8bfb\u7ed3\u679c&#xff08;isSuccess\u3001cause\u3001getNow&#xff09;\u76f4\u63a5\u8bfb volatile \u5b57\u6bb5\u3002\u540c\u65f6\u7528\u4e09\u4e2a\u9759\u6001\u6807\u8bb0\u503c\u907f\u514d\u4e3a\u5e38\u89c1\u573a\u666f\u5206\u914d\u65b0\u5bf9\u8c61&#xff1a;<\/p>\n<p><span class=\"token class-name\"><span class=\"token namespace\">io<span class=\"token punctuation\">.<\/span>netty<span class=\"token punctuation\">.<\/span>util<span class=\"token punctuation\">.<\/span>concurrent<span class=\"token punctuation\">.<\/span><\/span>DefaultPromise<\/span><\/p>\n<p><span class=\"token comment\">\/\/ CAS \u66f4\u65b0 result \u5b57\u6bb5&#xff0c;\u65e0\u9501\u7ade\u4e89<\/span><br \/>\n<span class=\"token keyword\">private<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">final<\/span> <span class=\"token class-name\">AtomicReferenceFieldUpdater<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">DefaultPromise<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">Object<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> <span class=\"token constant\">RESULT_UPDATER<\/span> <span class=\"token operator\">&#061;<\/span><br \/>\n        <span class=\"token class-name\">AtomicReferenceFieldUpdater<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">newUpdater<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">DefaultPromise<\/span><span class=\"token punctuation\">.<\/span><span class=\"token keyword\">class<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">Object<\/span><span class=\"token punctuation\">.<\/span><span class=\"token keyword\">class<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;result&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u7279\u6b8a\u6807\u8bb0\u503c&#xff0c;\u907f\u514d\u4e3a\u6210\u529f\/\u4e0d\u53ef\u53d6\u6d88\/\u53d6\u6d88\u5206\u914d\u65b0\u5bf9\u8c61<\/span><br \/>\n<span class=\"token keyword\">private<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">final<\/span> <span class=\"token class-name\">Object<\/span> <span class=\"token constant\">SUCCESS<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">Object<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">private<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">final<\/span> <span class=\"token class-name\">Object<\/span> <span class=\"token constant\">UNCANCELLABLE<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">Object<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">private<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">final<\/span> <span class=\"token class-name\">CauseHolder<\/span> <span class=\"token constant\">CANCELLATION_CAUSE_HOLDER<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">CauseHolder<\/span><span class=\"token punctuation\">(<\/span><br \/>\n        <span class=\"token class-name\">StacklessCancellationException<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">newInstance<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">DefaultPromise<\/span><span class=\"token punctuation\">.<\/span><span class=\"token keyword\">class<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;cancel(&#8230;)&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">private<\/span> <span class=\"token keyword\">volatile<\/span> <span class=\"token class-name\">Object<\/span> result<span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ CAS \u8bbe\u7f6e\u7ed3\u679c&#xff1a;\u53ea\u6709 null\u2192result \u6216 UNCANCELLABLE\u2192result \u4e24\u6761\u8def\u5f84<\/span><br \/>\n<span class=\"token keyword\">private<\/span> <span class=\"token keyword\">boolean<\/span> <span class=\"token function\">setValue0<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">Object<\/span> objResult<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token constant\">RESULT_UPDATER<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">compareAndSet<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">this<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">null<\/span><span class=\"token punctuation\">,<\/span> objResult<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">||<\/span><br \/>\n        <span class=\"token constant\">RESULT_UPDATER<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">compareAndSet<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">this<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token constant\">UNCANCELLABLE<\/span><span class=\"token punctuation\">,<\/span> objResult<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token function\">checkNotifyWaiters<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token function\">notifyListeners<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">true<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">false<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>SUCCESS \u8868\u793a\u6210\u529f\u4f46\u7ed3\u679c\u4e3a null&#xff0c;UNCANCELLABLE \u8868\u793a\u4e0d\u53ef\u53d6\u6d88\u7684\u4e2d\u95f4\u72b6\u6001&#xff0c;CANCELLATION_CAUSE_HOLDER \u662f\u53d6\u6d88\u64cd\u4f5c\u7684\u9759\u6001\u5355\u4f8b\u3002\u8fd9\u4e09\u4e2a\u6807\u8bb0\u503c\u907f\u514d\u4e86\u9ad8\u9891\u573a\u666f\u4e0b\u7684\u5bf9\u8c61\u5206\u914d\u3002<\/p>\n<p>\u6808\u6df1\u5ea6\u4fdd\u62a4\u3002\u5d4c\u5957\u56de\u8c03\u8d85\u8fc7 MAX_LISTENER_STACK_DEPTH&#xff08;\u9ed8\u8ba4 8&#xff09;\u5c42\u5c31\u8f6c\u4e3a executor \u5f02\u6b65\u6267\u884c&#xff0c;\u9632\u6b62 StackOverflowError\u3002\u8fd9\u4e2a\u6df1\u5ea6\u8bb0\u5f55\u5728 InternalThreadLocalMap \u4e2d&#xff0c;\u662f\u7ebf\u7a0b\u672c\u5730\u7684&#xff1a;<\/p>\n<p><span class=\"token class-name\"><span class=\"token namespace\">io<span class=\"token punctuation\">.<\/span>netty<span class=\"token punctuation\">.<\/span>util<span class=\"token punctuation\">.<\/span>concurrent<span class=\"token punctuation\">.<\/span><\/span>DefaultPromise<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u6808\u6df1\u5ea6\u4fdd\u62a4&#xff1a;\u9632\u6b62\u76d1\u542c\u5668\u5d4c\u5957\u56de\u8c03\u5bfc\u81f4 StackOverflowError<\/span><br \/>\n<span class=\"token keyword\">private<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">final<\/span> <span class=\"token keyword\">int<\/span> <span class=\"token constant\">MAX_LISTENER_STACK_DEPTH<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">Math<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">min<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">8<\/span><span class=\"token punctuation\">,<\/span><br \/>\n        <span class=\"token class-name\">SystemPropertyUtil<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">getInt<\/span><span class=\"token punctuation\">(<\/span><span class=\"token constant\">PROPERTY_MAX_LISTENER_STACK_DEPTH<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">8<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u5728 notifyListeners() \u4e2d&#xff0c;\u5f53 executor.inEventLoop() \u4e3a true \u4e14\u6808\u6df1\u5ea6\u5c0f\u4e8e 8 \u65f6&#xff0c;\u76f4\u63a5\u540c\u6b65\u56de\u8c03&#xff1b;\u8d85\u8fc7\u9608\u503c\u5219\u63d0\u4ea4\u4e3a task \u5f02\u6b65\u6267\u884c\u3002finally \u5757\u4e2d\u6062\u590d\u6808\u6df1\u5ea6&#xff0c;\u786e\u4fdd\u5f02\u5e38\u5b89\u5168\u3002<\/p>\n<p>\u96f6\u5f00\u9500\u53d6\u6d88\u5f02\u5e38\u3002StacklessCancellationException \u91cd\u5199\u4e86 fillInStackTrace()&#xff0c;\u76f4\u63a5\u8fd4\u56de this \u4e0d\u586b\u5145\u5806\u6808&#xff0c;\u907f\u514d\u4e86 Throwable \u6784\u9020\u65f6\u7684 native call \u5f00\u9500&#xff1a;<\/p>\n<p><span class=\"token class-name\"><span class=\"token namespace\">io<span class=\"token punctuation\">.<\/span>netty<span class=\"token punctuation\">.<\/span>util<span class=\"token punctuation\">.<\/span>concurrent<span class=\"token punctuation\">.<\/span><\/span>DefaultPromise<\/span><\/p>\n<p><span class=\"token comment\">\/\/ StacklessCancellationException&#xff1a;\u91cd\u5199 fillInStackTrace()&#xff0c;\u4e0d\u751f\u6210\u5806\u6808\u8ffd\u8e2a<\/span><br \/>\n<span class=\"token keyword\">private<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">final<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">StacklessCancellationException<\/span> <span class=\"token keyword\">extends<\/span> <span class=\"token class-name\">CancellationException<\/span> <span class=\"token punctuation\">{<\/span><\/p>\n<p>    <span class=\"token annotation punctuation\">&#064;Override<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">Throwable<\/span> <span class=\"token function\">fillInStackTrace<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">;<\/span>    <span class=\"token comment\">\/\/ \u4e0d\u586b\u5145\u5806\u6808&#xff0c;\u907f\u514d native call \u5f00\u9500<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u8f7b\u91cf\u5df2\u5b8c\u6210\u6001\u3002\u5982\u7b2c\u4e00\u8282\u6240\u8ff0&#xff0c;SucceededFuture \u548c FailedFuture \u8fde\u540c\u6b65\u90fd\u4e0d\u9700\u8981&#xff0c;\u6240\u6709\u65b9\u6cd5\u76f4\u63a5\u77ed\u8def\u8fd4\u56de&#xff0c;\u9002\u7528\u4e8e I\/O \u64cd\u4f5c&#034;\u7acb\u523b\u5c31\u5b8c\u6210&#034;\u7684\u573a\u666f\u3002CompletableFuture \u867d\u7136\u4e5f\u6709 volatile \u52a0 CAS&#xff0c;\u4f46 Completion \u94fe\u8868\u7ef4\u62a4\u5f00\u9500\u66f4\u5927&#xff0c;\u4e14\u6ca1\u6709\u9488\u5bf9&#034;\u5df2\u5b8c\u6210&#034;\u573a\u666f\u7684\u8f7b\u91cf\u5feb\u7167\u3002<\/p>\n<h3>\u516b\u3001\u539f\u56e0\u516d&#xff1a;ChannelFuture \u7684 I\/O \u4e0a\u4e0b\u6587\u6269\u5c55<\/h3>\n<p>Netty \u7684 ChannelFuture \u7ee7\u627f Future&#xff0c;\u989d\u5916\u7ed1\u5b9a\u4e86 Channel \u8bed\u4e49\u3002channel() \u65b9\u6cd5\u76f4\u63a5\u8fd4\u56de\u5173\u8054\u7684 Channel&#xff0c;\u8fd9\u4f7f\u5f97 Future \u5929\u7136\u643a\u5e26 I\/O \u64cd\u4f5c\u7684\u4e0a\u4e0b\u6587\u4fe1\u606f&#xff1a;<\/p>\n<p><span class=\"token class-name\"><span class=\"token namespace\">io<span class=\"token punctuation\">.<\/span>netty<span class=\"token punctuation\">.<\/span>channel<span class=\"token punctuation\">.<\/span><\/span>ChannelFuture<\/span><\/p>\n<p><span class=\"token comment\">\/\/ ChannelFuture \u5728 Future \u57fa\u7840\u4e0a\u6269\u5c55\u4e86 Channel \u4e0a\u4e0b\u6587<\/span><br \/>\n<span class=\"token keyword\">public<\/span> <span class=\"token keyword\">interface<\/span> <span class=\"token class-name\">ChannelFuture<\/span> <span class=\"token keyword\">extends<\/span> <span class=\"token class-name\">Future<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">Void<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> <span class=\"token punctuation\">{<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u8fd4\u56de\u6b64 Future \u5173\u8054\u7684 Channel<\/span><br \/>\n    <span class=\"token class-name\">Channel<\/span> <span class=\"token function\">channel<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token annotation punctuation\">&#064;Override<\/span><br \/>\n    <span class=\"token class-name\">ChannelFuture<\/span> <span class=\"token function\">addListener<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">GenericFutureListener<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token operator\">?<\/span> <span class=\"token keyword\">extends<\/span> <span class=\"token class-name\">Future<\/span><span class=\"token punctuation\">&lt;<\/span><span class=\"token operator\">?<\/span> <span class=\"token keyword\">super<\/span> <span class=\"token class-name\">Void<\/span><span class=\"token punctuation\">&gt;<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> listener<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token annotation punctuation\">&#064;Override<\/span><br \/>\n    <span class=\"token class-name\">ChannelFuture<\/span> <span class=\"token function\">sync<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">throws<\/span> <span class=\"token class-name\">InterruptedException<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>DefaultChannelPromise \u7ee7\u627f DefaultPromise \u5e76\u6301\u6709 Channel \u5f15\u7528&#xff0c;\u662f I\/O \u64cd\u4f5c\u4e0a\u4e0b\u6587\u611f\u77e5\u7684 Future\u3002\u5b83\u7684 executor() \u65b9\u6cd5\u8fd8\u505a\u4e86\u4e00\u4e2a\u91cd\u8981\u7684\u56de\u9000&#xff1a;\u5f53\u6ca1\u6709\u663e\u5f0f\u6307\u5b9a EventExecutor \u65f6&#xff0c;\u56de\u9000\u5230 Channel \u7ed1\u5b9a\u7684 EventLoop&#xff1a;<\/p>\n<p><span class=\"token class-name\"><span class=\"token namespace\">io<span class=\"token punctuation\">.<\/span>netty<span class=\"token punctuation\">.<\/span>channel<span class=\"token punctuation\">.<\/span><\/span>DefaultChannelPromise<\/span><\/p>\n<p><span class=\"token comment\">\/\/ DefaultChannelPromise &#061; DefaultPromise &#043; Channel \u5f15\u7528<\/span><br \/>\n<span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">DefaultChannelPromise<\/span> <span class=\"token keyword\">extends<\/span> <span class=\"token class-name\">DefaultPromise<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">Void<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> <span class=\"token keyword\">implements<\/span> <span class=\"token class-name\">ChannelPromise<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">FlushCheckpoint<\/span> <span class=\"token punctuation\">{<\/span><\/p>\n<p>    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">final<\/span> <span class=\"token class-name\">Channel<\/span> channel<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">DefaultChannelPromise<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">Channel<\/span> channel<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">EventExecutor<\/span> executor<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">super<\/span><span class=\"token punctuation\">(<\/span>executor<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>channel <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">checkNotNull<\/span><span class=\"token punctuation\">(<\/span>channel<span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;channel&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token annotation punctuation\">&#064;Override<\/span><br \/>\n    <span class=\"token keyword\">protected<\/span> <span class=\"token class-name\">EventExecutor<\/span> <span class=\"token function\">executor<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token class-name\">EventExecutor<\/span> e <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">super<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">executor<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>e <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token keyword\">null<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token keyword\">return<\/span> <span class=\"token function\">channel<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">eventLoop<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>    <span class=\"token comment\">\/\/ \u56de\u9000\u5230 Channel \u7ed1\u5b9a\u7684 EventLoop<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">else<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token keyword\">return<\/span> e<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token annotation punctuation\">&#064;Override<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">Channel<\/span> <span class=\"token function\">channel<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> channel<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>CompletableFuture \u65e0\u6cd5\u8868\u8fbe\u8fd9\u5c42\u8bed\u4e49&#xff1a;\u5b83\u4e0d\u77e5\u9053 Channel \u662f\u4ec0\u4e48&#xff0c;\u65e0\u6cd5\u5173\u8054 I\/O \u4e0a\u4e0b\u6587\u3002Netty \u7684\u6574\u4e2a I\/O \u94fe\u8def\u90fd\u4ee5 ChannelFuture \u4e3a\u7ebd\u5e26&#xff1a;connect() \u8fd4\u56de ChannelFuture\u3001write() \u8fd4\u56de ChannelFuture\u3001close() \u8fd4\u56de ChannelFuture&#xff0c;\u4e1a\u52a1\u4ee3\u7801\u901a\u8fc7 addListener \u5728 I\/O \u5b8c\u6210\u540e\u6267\u884c\u540e\u7eed\u903b\u8f91&#xff0c;\u800c\u56de\u8c03\u5728\u7ed1\u5b9a\u7684 EventLoop \u4e0a\u6267\u884c&#xff0c;\u5929\u7136\u4fdd\u8bc1\u4e86 Channel \u64cd\u4f5c\u7684\u7ebf\u7a0b\u5b89\u5168\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/09\/20260903034109-6a98ec55823fc.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<p>\u4e0a\u56fe\u5c55\u793a\u4e86 ChannelFuture \u5728 I\/O \u94fe\u8def\u4e2d\u7684\u5b8c\u6574\u89d2\u8272&#xff1a;\u4e1a\u52a1\u4ee3\u7801\u53d1\u8d77 writeAndFlush() \u62ff\u5230 ChannelFuture&#xff0c;\u6ce8\u518c\u76d1\u542c\u5668\u540e\u7acb\u523b\u8fd4\u56de&#xff1b;EventLoop \u7ebf\u7a0b\u6267\u884c\u5b9e\u9645\u7684 Socket \u5199\u5165\u64cd\u4f5c&#xff0c;\u5b8c\u6210\u540e\u8c03\u7528 setSuccess() \u89e6\u53d1\u76d1\u542c\u5668\u901a\u77e5&#xff0c;\u76d1\u542c\u5668\u56de\u8c03\u5728\u540c\u4e00\u4e2a EventLoop \u7ebf\u7a0b\u4e0a\u6267\u884c\u3002\u6574\u4e2a\u94fe\u8def\u4ece\u53d1\u8d77\u5230\u56de\u8c03&#xff0c;\u59cb\u7ec8\u5728\u540c\u4e00\u4e2a\u7ebf\u7a0b\u4e0a\u5b8c\u6210&#xff0c;\u65e0\u9700\u52a0\u9501\u3002<\/p>\n<p>\u8fd9\u662f Netty Future \u4f53\u7cfb\u4e0e I\/O \u6a21\u578b\u6df1\u5ea6\u7ed1\u5b9a\u7684\u4f53\u73b0&#xff0c;CompletableFuture \u4f5c\u4e3a\u901a\u7528\u539f\u8bed\u65e0\u6cd5\u63d0\u4f9b\u8fd9\u79cd\u9886\u57df\u7279\u5b9a\u7684\u4e0a\u4e0b\u6587\u3002<\/p>\n<h3>\u5168\u6587\u5c0f\u7ed3<\/h3>\n<p>\u672c\u6587\u4ece\u6982\u5ff5\u6f84\u6e05\u51fa\u53d1&#xff0c;\u7cfb\u7edf\u5bf9\u6bd4\u4e86 Java CompletableFuture \u4e0e Netty Future\/Promise \u4f53\u7cfb\u7684\u4e5d\u4e2a\u7ef4\u5ea6\u5dee\u5f02&#xff0c;\u5e76\u6df1\u5165\u5256\u6790\u4e86 Netty \u81ea\u7814 Future \u4f53\u7cfb\u7684\u516d\u4e2a\u539f\u56e0\u3002<\/p>\n<p>\u5728\u6982\u5ff5\u5c42\u9762&#xff0c;Netty \u7684 CompleteFuture \u662f&#034;\u5df2\u5b8c\u6210 Future \u7684\u8f7b\u91cf\u9aa8\u67b6\u7c7b&#034;&#xff0c;\u4e0d\u662f CompletableFuture \u7684\u5bf9\u6807\u7269&#xff0c;\u4e24\u8005\u7684\u8bbe\u8ba1\u76ee\u6807\u5b8c\u5168\u4e0d\u540c\u3002\u5728\u6838\u5fc3\u5dee\u5f02\u5c42\u9762&#xff0c;Netty \u7684 Future\/Promise \u4f53\u7cfb\u5728\u8bfb\u5199\u5206\u79bb\u3001\u56de\u8c03\u7ebf\u7a0b\u4eb2\u548c\u6027\u3001\u6b7b\u9501\u68c0\u6d4b\u3001\u6808\u6ea2\u51fa\u4fdd\u62a4\u3001\u8f7b\u91cf\u5df2\u5b8c\u6210\u6001\u3001I\/O \u4e0a\u4e0b\u6587\u6269\u5c55\u7b49\u65b9\u9762\u5747\u4e0e CompletableFuture \u6709\u672c\u8d28\u533a\u522b\u3002\u5728\u8bbe\u8ba1\u52a8\u56e0\u5c42\u9762&#xff0c;\u6700\u6838\u5fc3\u7684\u539f\u56e0\u662f EventLoop \u7ebf\u7a0b\u4eb2\u548c\u6027&#xff1a;Netty \u7684\u65e0\u9501\u5316\u67b6\u6784\u4f9d\u8d56&#034;\u540c\u4e00\u7ebf\u7a0b\u4e32\u884c\u6267\u884c&#034;\u7684\u7ea6\u675f&#xff0c;\u76d1\u542c\u5668\u56de\u8c03\u5fc5\u987b\u59cb\u7ec8\u5728\u7ed1\u5b9a\u7684 EventLoop \u7ebf\u7a0b\u4e0a\u6267\u884c&#xff0c;CompletableFuture \u65e0\u6cd5\u4fdd\u8bc1\u8fd9\u4e00\u70b9\u3002\u6b7b\u9501\u9632\u62a4\u548c\u8bfb\u5199\u5206\u79bb\u5206\u522b\u4ece\u5b89\u5168\u6027\u548c API \u7ea6\u675f\u89d2\u5ea6\u52a0\u56fa\u4e86\u8fd9\u4e00\u6a21\u578b\u3002\u5386\u53f2\u539f\u56e0\u662f Netty 3&#xff08;2008\u5e74&#xff09;\u65e9\u4e8e JDK 8&#xff08;2014\u5e74&#xff09;\u7684\u5ba2\u89c2\u4e8b\u5b9e&#xff0c;\u4f46\u5373\u4f7f CompletableFuture \u51fa\u73b0\u540e&#xff0c;\u524d\u4e09\u8005\u7684\u67b6\u6784\u7ea6\u675f\u4e5f\u4f7f\u5207\u6362\u4e0d\u53ef\u884c\u3002\u6027\u80fd\u4f18\u5316\u548c ChannelFuture \u7684 I\/O \u4e0a\u4e0b\u6587\u6269\u5c55\u5219\u662f Netty \u5728\u81ea\u6709\u4f53\u7cfb\u4e0a\u989d\u5916\u83b7\u5f97\u7684\u9886\u57df\u7279\u5b9a\u4f18\u52bf\u3002<\/p>\n<p>\u4e00\u53e5\u8bdd\u603b\u7ed3&#xff1a;Netty \u7684 Future\/Promise \u4e0d\u662f CompletableFuture \u7684\u66ff\u4ee3\u54c1&#xff0c;\u800c\u662f\u4e3a EventLoop \u7ebf\u7a0b\u6a21\u578b\u91cf\u8eab\u5b9a\u5236\u7684\u5f02\u6b65\u539f\u8bed&#xff0c;\u7ebf\u7a0b\u4eb2\u548c\u6027\u3001\u6b7b\u9501\u9632\u62a4\u3001\u8bfb\u5199\u5206\u79bb\u4e09\u8005\u7f3a\u4e00\u4e0d\u53ef\u3002<\/p>\n<hr \/>\n<p>\u539f\u521b\u4e0d\u6613&#xff0c;\u5982\u679c\u672c\u6587\u5bf9\u60a8\u6709\u5e2e\u52a9&#xff0c;\u5e26\u6765\u4e86\u4e9b\u8bb8\u7075\u611f\u6216\u542f\u53d1&#xff0c;\u70e6\u8bf7\u52a8\u52a8\u5c0f\u624b\u70b9\u8d5e\u3001\u5173\u6ce8\u3001\u8f6c\u53d1\u3001\u6536\u85cf\u3002\u8fd9\u662f\u4f5c\u8005\u6301\u7eed\u66f4\u65b0\u7684\u52a8\u529b\u6e90\u6cc9&#xff0c;\u8877\u5fc3\u611f\u8c22\u60a8\u7684\u652f\u6301\u3002\u6211\u4f1a\u5c3d\u91cf\u5728\u5de5\u4f5c\u4e4b\u4f59&#xff0c;\u4e3a\u5927\u5bb6\u5e26\u6765\u66f4\u9ad8\u54c1\u8d28\u7684\u5185\u5bb9&#xff0c;\u52aa\u529b\u4fdd\u6301\u5468\u66f4\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6587\u7ae0\u76ee\u5f55\u4e00\u3001\u6982\u5ff5\u6f84\u6e05&#xff1a;CompleteFuture \u2260 CompletableFuture\u4e8c\u3001\u6838\u5fc3\u7ef4\u5ea6\u5bf9\u6bd4&#xff1a;\u4ece\u8bfb\u5199\u5206\u79bb\u5230\u7ebf\u7a0b\u6a21\u578b\u4e09\u3001\u539f\u56e0\u4e00&#xff1a;EventLoop \u7ebf\u7a0b\u4eb2\u548c\u6027&#xff08;\u6700\u6838\u5fc3\u539f\u56e0&#xff09;\u56db\u3001\u539f\u56e0\u4e8c&#xff1a;\u6b7b\u9501\u9632\u62a4\u673a\u5236\u4e94\u3001\u539f\u56e0\u4e09&#xff1a;\u8bfb\u5199\u5206\u79bb\u7684 API \u8bbe\u8ba1\u516d\u3001\u539f\u56e0\u56db&#xff1a;\u5386\u53f2\u539f\u56e0\u4e0e\u751f\u6001\u9002\u914d\u4e03\u3001\u539f\u56e0\u4e94&#xff1a;\u6027\u80fd\u4f18\u5316  \u8f7b\u91cf\u5316\u516b\u3001\u539f\u56e0\u516d&#xff1a;ChannelFutur<\/p>\n","protected":false},"author":2,"featured_media":99819,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[99,1348,188],"topic":[],"class_list":["post-99825","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-java","tag-1348","tag-188"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>CompleteFuture 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