{"id":853,"date":"2020-09-09T10:48:27","date_gmt":"2020-09-09T02:48:27","guid":{"rendered":"http:\/\/prayerlaputa.com\/?p=853"},"modified":"2020-09-09T10:51:50","modified_gmt":"2020-09-09T02:51:50","slug":"%e6%ba%90%e7%a0%81%e5%88%86%e6%9e%90%e4%b9%8bnetty%e7%ba%bf%e7%a8%8b%e6%a8%a1%e5%9e%8b","status":"publish","type":"post","link":"http:\/\/prayerlaputa.com\/?p=853","title":{"rendered":"\u6e90\u7801\u5206\u6790\u4e4bNetty\u7ebf\u7a0b\u6a21\u578b"},"content":{"rendered":"<h2 class=\"md-end-block md-heading\"><span class=\"md-plain\">\u4e0d\u5f97\u4e0d\u8bf4\u7684Reactor\u6a21\u5f0f<\/span><\/h2>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">\u63d0\u5230Netty\uff0c\u5c31\u5fc5\u987b\u5148\u8bf4\u4e00\u4e0bReactor\u6a21\u5f0f\uff0c\u6e90\u5934\u5e94\u8be5\u662fDoug Lea\u5927\u795e\uff08\u5b66java\u7684\u5982\u679c\u4e0d\u77e5\u9053\u8fd9\u4f4d\u795e\u7684\u8bf7\u81ea\u5df1\u53cd\u601d\u4e00\u4e0b\u2026\u2026\uff09\u7684<\/span><span class=\"md-pair-s\" spellcheck=\"false\"><code>Scalable IO in Java<\/code><\/span><span class=\"md-plain\">\u6240\u63d0\u51fa\u7684<\/span><span class=\"md-pair-s\" spellcheck=\"false\"><code>Multiple Reactors<\/code><\/span><span class=\"md-plain\">\u6a21\u5f0f\uff0c\u53c2\u89c1\u4e0b\u56fe<\/span><\/p>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\"><img loading=\"lazy\" class=\" wp-image-854 aligncenter\" src=\"http:\/\/prayerlaputa.com\/wp-content\/uploads\/2020\/09\/multiple-reactors-pattern-300x234.jpg\" alt=\"\" width=\"401\" height=\"313\" srcset=\"http:\/\/prayerlaputa.com\/wp-content\/uploads\/2020\/09\/multiple-reactors-pattern-300x234.jpg 300w, http:\/\/prayerlaputa.com\/wp-content\/uploads\/2020\/09\/multiple-reactors-pattern-1024x797.jpg 1024w, http:\/\/prayerlaputa.com\/wp-content\/uploads\/2020\/09\/multiple-reactors-pattern-768x598.jpg 768w, http:\/\/prayerlaputa.com\/wp-content\/uploads\/2020\/09\/multiple-reactors-pattern.jpg 1287w\" sizes=\"(max-width: 401px) 100vw, 401px\" \/><\/span><\/p>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">\u5982\u679c\u60f3\u77e5\u9053\u4e3a\u4f55\u51fa\u73b0Reactor\u6a21\u5f0f\uff0c\u9700\u8981\u5c06IO\u53d1\u5c55\u8fc7\u7a0b\uff0c\u90fd\u8bf4\u4e00\u4e0b\u53ef\u80fd\u624d\u4f1a\u6bd4\u8f83\u6e05\u6670\uff0c\u6b64\u5904\u5c31\u4e0d\u4e00\u4e00\u5c55\u5f00\uff0c\u6709\u5174\u8da3\u7684\u7ae5\u978b\u53ef\u4ee5\u53c2\u8003\u8fd9\u7bc7\u5e16\u5b50\uff1a<\/span><span class=\"md-meta-i-c md-link\"><a spellcheck=\"false\" href=\"https:\/\/www.cnblogs.com\/crazymakercircle\/p\/9833847.html\"><span class=\"md-plain\">Reactor\u6a21\u5f0f<\/span><\/a><\/span><!--more--><\/p>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">\u90a3\u4e48\uff0c<\/span><span class=\"md-pair-s \"><strong><span class=\"md-plain\">\u4ec0\u4e48\u662fReactor\u6a21\u5f0f\u5462\uff1f<\/span><\/strong><\/span><\/p>\n<blockquote>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">Reactor\u6a21\u5f0f\u662f\u4e8b\u4ef6\u9a71\u52a8\u6a21\u578b\uff0c\u6709\u4e00\u4e2a\u6216\u591a\u4e2a\u5e76\u53d1\u8f93\u5165\u6e90\uff0c\u6709\u4e00\u4e2aService Handler\uff0c\u6709\u591a\u4e2aRequest Handlers\uff1b\u8fd9\u4e2aService Handler\u4f1a\u540c\u6b65\u7684\u5c06\u8f93\u5165\u7684\u8bf7\u6c42\uff08Event\uff09\u591a\u8def\u590d\u7528\u7684\u5206\u53d1\u7ed9\u76f8\u5e94\u7684Request Handler\u3002\u4ece\u7ed3\u6784\u4e0a\uff0c\u8fd9\u6709\u70b9\u7c7b\u4f3c\u751f\u4ea7\u8005\u6d88\u8d39\u8005\u6a21\u5f0f\uff0c\u5373\u6709\u4e00\u4e2a\u6216\u591a\u4e2a\u751f\u4ea7\u8005\u5c06\u4e8b\u4ef6\u653e\u5165\u4e00\u4e2aQueue\u4e2d\uff0c\u800c\u4e00\u4e2a\u6216\u591a\u4e2a\u6d88\u8d39\u8005\u4e3b\u52a8\u7684\u4ece\u8fd9\u4e2aQueue\u4e2dPoll\u4e8b\u4ef6\u6765\u5904\u7406\uff1b\u800cReactor\u6a21\u5f0f\u5219\u5e76\u6ca1\u6709Queue\u6765\u505a\u7f13\u51b2\uff0c\u6bcf\u5f53\u4e00\u4e2aEvent\u8f93\u5165\u5230Service Handler\u4e4b\u540e\uff0c\u8be5Service Handler\u4f1a\u4e3b\u52a8\u7684\u6839\u636e\u4e0d\u540c\u7684Event\u7c7b\u578b\u5c06\u5176\u5206\u53d1\u7ed9\u5bf9\u5e94\u7684Request Handler\u6765\u5904\u7406\u3002<\/span><\/p>\n<p class=\"md-end-block md-p\"><span class=\"md-image md-img-loaded\" data-src=\"images\/reactor-class-diagram.webp\"><img loading=\"lazy\" class=\" wp-image-855 aligncenter\" src=\"http:\/\/prayerlaputa.com\/wp-content\/uploads\/2020\/09\/reactor-class-diagram-300x194.jpg\" alt=\"\" width=\"337\" height=\"218\" srcset=\"http:\/\/prayerlaputa.com\/wp-content\/uploads\/2020\/09\/reactor-class-diagram-300x194.jpg 300w, http:\/\/prayerlaputa.com\/wp-content\/uploads\/2020\/09\/reactor-class-diagram.jpg 527w\" sizes=\"(max-width: 337px) 100vw, 337px\" \/><\/span><\/p>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">\u8be5\u56fe\u4e3aReactor\u6a21\u578b\u7c7b\u56fe\uff0c\u5b9e\u73b0Reactor\u6a21\u5f0f\u9700\u8981\u5b9e\u73b0\u4ee5\u4e0b\u51e0\u4e2a\u7c7b\uff1a<\/span><\/p>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">1\uff09EventHandler\uff1a\u4e8b\u4ef6\u5904\u7406\u5668\uff0c\u53ef\u4ee5\u6839\u636e\u4e8b\u4ef6\u7684\u4e0d\u540c\u72b6\u6001\u521b\u5efa\u5904\u7406\u4e0d\u540c\u72b6\u6001\u7684\u5904\u7406\u5668\uff1b<\/span><\/p>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">2\uff09Handle\uff1a\u53ef\u4ee5\u7406\u89e3\u4e3a\u4e8b\u4ef6\uff0c\u5728\u7f51\u7edc\u7f16\u7a0b\u4e2d\u5c31\u662f\u4e00\u4e2aSocket\uff0c\u5728\u6570\u636e\u5e93\u64cd\u4f5c\u4e2d\u5c31\u662f\u4e00\u4e2aDBConnection\uff1b<\/span><\/p>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">3\uff09InitiationDispatcher\uff1a\u7528\u4e8e\u7ba1\u7406EventHandler\uff0c\u5206\u53d1event\u7684\u5bb9\u5668\uff0c\u4e5f\u662f\u4e00\u4e2a\u4e8b\u4ef6\u5904\u7406\u8c03\u5ea6\u5668\uff0cTomcat\u7684Dispatcher\u5c31\u662f\u4e00\u4e2a\u5f88\u597d\u7684\u5b9e\u73b0\uff0c\u7528\u4e8e\u63a5\u6536\u5230\u7f51\u7edc\u8bf7\u6c42\u540e\u8fdb\u884c\u7b2c\u4e00\u6b65\u7684\u4efb\u52a1\u5206\u53d1\uff0c\u5206\u53d1\u7ed9\u76f8\u5e94\u7684\u5904\u7406\u5668\u53bb\u5f02\u6b65\u5904\u7406\uff0c\u6765\u4fdd\u8bc1\u541e\u5410\u91cf\uff1b<\/span><\/p>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">4\uff09Demultiplexer\uff1a\u963b\u585e\u7b49\u5f85\u4e00\u7cfb\u5217\u7684Handle\u4e2d\u7684\u4e8b\u4ef6\u5230\u6765\uff0c\u5982\u679c\u963b\u585e\u7b49\u5f85\u8fd4\u56de\uff0c\u5373\u8868\u793a\u5728\u8fd4\u56de\u7684Handle\u4e2d\u53ef\u4ee5\u4e0d\u963b\u585e\u7684\u6267\u884c\u8fd4\u56de\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u8fd9\u4e2a\u6a21\u5757\u4e00\u822c\u4f7f\u7528\u64cd\u4f5c\u7cfb\u7edf\u7684select\u6765\u5b9e\u73b0\u3002\u5728Java NIO\u4e2d\u7528Selector\u6765\u5c01\u88c5\uff0c\u5f53Selector.select()\u8fd4\u56de\u65f6\uff0c\u53ef\u4ee5\u8c03\u7528Selector\u7684selectedKeys()\u65b9\u6cd5\u83b7\u53d6Set<\/span><span class=\"md-tag md-raw-inline\" spellcheck=\"false\">&lt;SelectionKey&gt;<\/span><span class=\"md-plain\">\uff0c\u4e00\u4e2aSelectionKey\u8868\u8fbe\u4e00\u4e2a\u6709\u4e8b\u4ef6\u53d1\u751f\u7684Channel\u4ee5\u53ca\u8be5Channel\u4e0a\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002<\/span><\/p>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">Reactor\u65f6\u5e8f\u56fe \u5982\u4e0b\uff1a<\/span><\/p>\n<p class=\"md-end-block md-p\"><img loading=\"lazy\" class=\" wp-image-856 aligncenter\" src=\"http:\/\/prayerlaputa.com\/wp-content\/uploads\/2020\/09\/reactor-sequence-diagram-300x174.jpg\" alt=\"\" width=\"379\" height=\"220\" srcset=\"http:\/\/prayerlaputa.com\/wp-content\/uploads\/2020\/09\/reactor-sequence-diagram-300x174.jpg 300w, http:\/\/prayerlaputa.com\/wp-content\/uploads\/2020\/09\/reactor-sequence-diagram.jpg 546w\" sizes=\"(max-width: 379px) 100vw, 379px\" \/><\/p>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">1\uff09\u521d\u59cb\u5316InitiationDispatcher\uff0c\u5e76\u521d\u59cb\u5316\u4e00\u4e2aHandle\u5230EventHandler\u7684Map\u3002<\/span><\/p>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">2\uff09\u6ce8\u518cEventHandler\u5230InitiationDispatcher\u4e2d\uff0c\u6bcf\u4e2aEventHandler\u5305\u542b\u5bf9\u76f8\u5e94Handle\u7684\u5f15\u7528\uff0c\u4ece\u800c\u5efa\u7acbHandle\u5230EventHandler\u7684\u6620\u5c04\uff08Map\uff09\u3002<\/span><\/p>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">3\uff09\u8c03\u7528InitiationDispatcher\u7684handle_events()\u65b9\u6cd5\u4ee5\u542f\u52a8Event Loop\u3002\u5728Event Loop\u4e2d\uff0c\u8c03\u7528select()\u65b9\u6cd5\uff08Synchronous Event Demultiplexer\uff09\u963b\u585e\u7b49\u5f85Event\u53d1\u751f\u3002<\/span><\/p>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">4\uff09\u5f53\u67d0\u4e2a\u6216\u67d0\u4e9bHandle\u7684Event\u53d1\u751f\u540e\uff0cselect()\u65b9\u6cd5\u8fd4\u56de\uff0cInitiationDispatcher\u6839\u636e\u8fd4\u56de\u7684Handle\u627e\u5230\u6ce8\u518c\u7684EventHandler\uff0c\u5e76\u56de\u8c03\u8be5EventHandler\u7684handle_events()\u65b9\u6cd5\u3002<\/span><\/p>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">5\uff09\u5728EventHandler\u7684handle_events()\u65b9\u6cd5\u4e2d\u8fd8\u53ef\u4ee5\u5411InitiationDispatcher\u4e2d\u6ce8\u518c\u65b0\u7684Eventhandler\uff0c\u6bd4\u5982\u5bf9AcceptorEventHandler\u6765\uff0c\u5f53\u6709\u65b0\u7684client\u8fde\u63a5\u65f6\uff0c\u5b83\u4f1a\u4ea7\u751f\u65b0\u7684EventHandler\u4ee5\u5904\u7406\u65b0\u7684\u8fde\u63a5\uff0c\u5e76\u6ce8\u518c\u5230InitiationDispatcher\u4e2d\u3002<\/span><\/p>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">\u5f15\u81ea\uff1a<\/span><span class=\"md-link md-pair-s\" spellcheck=\"false\"><a href=\"https:\/\/www.jianshu.com\/p\/188ef8462100\">https:\/\/www.jianshu.com\/p\/188ef8462100<\/a><\/span><\/p>\n<\/blockquote>\n<h2 class=\"md-end-block md-heading\"><span class=\"md-plain\">Reactor\u7684\u7a0b\u5e8f\u5b9e\u73b0<\/span><\/h2>\n<pre class=\"md-fences md-end-block ty-contain-cm modeLoaded\" lang=\"\" spellcheck=\"false\"><span role=\"presentation\">\u200b<\/span>\r\n<span role=\"presentation\">void Reactor::handle_events(){<\/span>\r\n<span role=\"presentation\">  \/\/\u901a\u8fc7\u540c\u6b65\u4e8b\u4ef6\u591a\u8def\u9009\u62e9\u5668\u63d0\u4f9b\u7684<\/span>\r\n<span role=\"presentation\">  \/\/select()\u65b9\u6cd5\u76d1\u542c\u7f51\u7edc\u4e8b\u4ef6<\/span>\r\n<span role=\"presentation\">  select(handlers);<\/span>\r\n<span role=\"presentation\">  \/\/\u5904\u7406\u7f51\u7edc\u4e8b\u4ef6<\/span>\r\n<span role=\"presentation\">  for(h in handlers){<\/span>\r\n<span role=\"presentation\"> \u00a0  h.handle_event();<\/span>\r\n<span role=\"presentation\">  }<\/span>\r\n<span role=\"presentation\">}<\/span>\r\n<span role=\"presentation\">\/\/ \u5728\u4e3b\u7a0b\u5e8f\u4e2d\u542f\u52a8\u4e8b\u4ef6\u5faa\u73af<\/span>\r\n<span role=\"presentation\">while (true) {<\/span>\r\n<span role=\"presentation\">  handle_events();<\/span><\/pre>\n<h2 class=\"md-end-block md-heading\"><span class=\"md-plain\">Netty\u4e2d\u7684\u7ebf\u7a0b\u6a21\u578b<\/span><\/h2>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">\u4e3a\u4e86\u5b9e\u73b0\u9ad8\u6027\u80fd\u7684IO\uff0cNetty\u7684\u7ebf\u7a0b\u6a21\u578b\u53c2\u8003\u4e86Reactor\u6a21\u5f0f\uff0c\u4f46\u6ca1\u6709\u5b8c\u5168\u7167\u642c\u3002<\/span><\/p>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">Netty \u4e2d\u6700\u6838\u5fc3\u7684\u6982\u5ff5\u662f\u4e8b\u4ef6\u5faa\u73af\uff08EventLoop\uff09\uff0c\u5176\u5b9e\u4e5f\u5c31\u662f Reactor \u6a21\u5f0f\u4e2d\u7684 Reactor\uff0c\u8d1f\u8d23\u76d1\u542c\u7f51\u7edc\u4e8b\u4ef6\u5e76\u8c03\u7528\u4e8b\u4ef6\u5904\u7406\u5668\u8fdb\u884c\u5904\u7406\u3002\u7a0b\u5e8f\u5b9e\u73b0\u4e0a\uff0cEventLoop\u5176\u5b9e\u5c31\u662f\u6307\u4e0a\u4e00\u5c0f\u8282\u4e2d\u7684\u6574\u4e2awhile(true)\u5faa\u73af<\/span><\/p>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">\u57284.x\u7248\u672cNetty\u4e2d\uff1a<\/span><\/p>\n<ul class=\"ul-list\" data-mark=\"-\">\n<li class=\"md-list-item\">\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">\u7f51\u7edc\u8fde\u63a5 &#8211;&gt; EventLoop \uff1a\u7a33\u5b9a\u7684 n:1\u5173\u7cfb\uff0c\u8fd9\u91cc\u7684\u7a33\u5b9a\u6307\u7684\u662f\u5173\u7cfb\u4e00\u65e6\u786e\u5b9a\u5c31\u4e0d\u518d\u53d1\u751f\u53d8\u5316\u3002<\/span><\/p>\n<\/li>\n<li class=\"md-list-item\">\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">EventLoop &#8211;&gt; Java\u7ebf\u7a0b \uff1a 1:1\u5173\u7cfb<\/span><\/p>\n<\/li>\n<li class=\"md-list-item\">\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">\u6240\u4ee5<\/span><span class=\"md-pair-s \"><strong><span class=\"md-plain\">\u4e00\u4e2a\u7f51\u7edc\u8fde\u63a5\u53ea\u4f1a\u5bf9\u5e94\u4e00\u4e2aJava\u7ebf\u7a0b<\/span><\/strong><\/span><\/p>\n<ul class=\"ul-list\" data-mark=\"-\">\n<li class=\"md-list-item\">\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">\u6700\u5927\u7684\u597d\u5904\u5c31\u662f\u5bf9\u4e8e\u4e00\u4e2a\u7f51\u7edc\u8fde\u63a5\u7684\u4e8b\u4ef6\u5904\u7406\u662f\u5355\u7ebf\u7a0b\u7684\uff0c\u8fd9\u6837\u5c31\u907f\u514d\u4e86\u5404\u79cd\u5e76\u53d1\u95ee\u9898\u3002<\/span><\/p>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">\u987a\u4fbf\u63d0\u4e00\u53e5\uff0c<\/span><span class=\"md-pair-s\"><strong><span class=\"md-plain\">Java\u7ebf\u7a0b\u4e0elinux\u64cd\u4f5c\u7cfb\u7edf\u7684\u7ebf\u7a0b\u662f1:1\u5173\u7cfb<\/span><\/strong><\/span><span class=\"md-plain\">\uff0c\u8fd9\u4e2a\u53ef\u4ee5\u53c2\u8003\u7ecf\u5178\u7684 The C10K Problem\u90a3\u7bc7\u6587\u7ae0\u3002<\/span><\/p>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">Netty\u7ebf\u7a0b\u6a21\u578b\u53ef\u4ee5\u53c2\u8003\u8fd9\u5f20\u56fe<\/span><\/p>\n<p class=\"md-end-block md-p\"><span class=\"md-image md-img-loaded\" data-src=\"images\/netty-io-thread-model.png\"><img loading=\"lazy\" class=\" wp-image-857 aligncenter\" src=\"http:\/\/prayerlaputa.com\/wp-content\/uploads\/2020\/09\/netty-io-thread-model-300x149.png\" alt=\"\" width=\"427\" height=\"212\" srcset=\"http:\/\/prayerlaputa.com\/wp-content\/uploads\/2020\/09\/netty-io-thread-model-300x149.png 300w, http:\/\/prayerlaputa.com\/wp-content\/uploads\/2020\/09\/netty-io-thread-model-1024x507.png 1024w, http:\/\/prayerlaputa.com\/wp-content\/uploads\/2020\/09\/netty-io-thread-model-768x380.png 768w, http:\/\/prayerlaputa.com\/wp-content\/uploads\/2020\/09\/netty-io-thread-model.png 1137w\" sizes=\"(max-width: 427px) 100vw, 427px\" \/><\/span><\/p>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">\u5f15\u81ea\uff1a\u6781\u5ba2\u65f6\u95f4-\u300aJava\u5e76\u53d1\u7f16\u7a0b\u5b9e\u6218\u300b<\/span><\/p>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">\u5982\u56fe\uff0cNetty\u4e2d\uff0cEventLoopGroup\u7531\u4e00\u7ec4 EventLoop \u7ec4\u6210\u3002\u5b9e\u9645\u4f7f\u7528\u4e2d\uff0c\u4e00\u822c\u90fd\u4f1a\u521b\u5efa\u4e24\u4e2a EventLoopGroup\uff0c\u4e00\u4e2a\u79f0\u4e3a bossGroup\uff0c\u4e00\u4e2a\u79f0\u4e3a workerGroup\u3002<\/span><\/p>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">\u4e4b\u6240\u4ee5\u4f1a\u67092\u4e2aEventLoopGroup\uff0c\u539f\u56e0\u5728\u4e8esocket\u5904\u7406\u7f51\u7edc\u8bf7\u6c42\u7684\u673a\u5236\u3002socket \u5904\u7406 TCP \u7f51\u7edc\u8fde\u63a5\u8bf7\u6c42\uff0c\u662f\u5728\u4e00\u4e2a\u72ec\u7acb\u7684 socket \u4e2d\uff0c\u6bcf\u5f53\u6709\u4e00\u4e2a TCP \u8fde\u63a5\u6210\u529f\u5efa\u7acb\uff0c\u90fd\u4f1a\u521b\u5efa\u4e00\u4e2a\u65b0\u7684 socket\uff0c\u4e4b\u540e\u5bf9 TCP \u8fde\u63a5\u7684\u8bfb\u5199\u90fd\u662f\u7531\u65b0\u521b\u5efa\u5904\u7406\u7684 socket \u5b8c\u6210\u7684\u3002\u4e5f\u5c31\u662f\u8bf4<\/span><span class=\"md-pair-s\"><strong><span class=\"md-plain\">\u5904\u7406 TCP \u8fde\u63a5\u8bf7\u6c42\u548c\u8bfb\u5199\u8bf7\u6c42\u662f\u901a\u8fc7\u4e24\u4e2a\u4e0d\u540c\u7684 socket \u5b8c\u6210\u7684\u3002<\/span><\/strong><\/span><\/p>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">\u5728 Netty \u4e2d\uff0cbossGroup \u5c31\u7528\u6765\u5904\u7406\u8fde\u63a5\u8bf7\u6c42\u7684\uff0c\u800c workerGroup \u662f\u7528\u6765\u5904\u7406\u8bfb\u5199\u8bf7\u6c42\u7684\u3002bossGroup \u5904\u7406\u5b8c\u8fde\u63a5\u8bf7\u6c42\u540e\uff0c\u4f1a\u5c06\u8fd9\u4e2a\u8fde\u63a5\u63d0\u4ea4\u7ed9 workerGroup \u6765\u5904\u7406\uff0c workerGroup \u91cc\u9762\u6709\u591a\u4e2a EventLoop\uff0c\u65b0\u7684\u8fde\u63a5\u4f1a\u4ea4\u7ed9\u54ea\u4e2a EventLoop \u6765\u5904\u7406\u7531\u8d1f\u8f7d\u5747\u8861\u7b97\u6cd5\u51b3\u5b9a\uff0c\u76ee\u524dNetty\u4f7f\u7528\u7684\u662f<\/span><span class=\"md-pair-s \"><strong><span class=\"md-plain\">\u8f6e\u8be2\u7b97\u6cd5<\/span><\/strong><\/span><span class=\"md-plain\">\u3002<\/span><\/p>\n<h3 class=\"md-end-block md-heading\"><span class=\"md-plain\">\u9898\u5916\u8bdd<\/span><\/h3>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">Netty 3.x\u4e0eNetty 4.x \u533a\u522b\u8f83\u5927\uff0c\u6709\u5174\u8da3\u53ef\u4ee5\u53c2\u8003\u8fd9\u7bc7\u6587\u7ae0\uff1a<\/span><span class=\"md-meta-i-c md-link\"><a spellcheck=\"false\" href=\"https:\/\/cloud.tencent.com\/developer\/article\/1120234\"><span class=\"md-plain\">netty3\u4e0enetty4\u7684\u533a\u522b<\/span><\/a><\/span><\/p>\n<h2 class=\"md-end-block md-heading\"><span class=\"md-plain\">\u4f7f\u7528Netty\u5b9e\u73b0Echo\u670d\u52a1<\/span><\/h2>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">\u4e0b\u9762\u7ed9\u51fa\u4e00\u4e2a\u5177\u4f53\u4f8b\u5b50\uff0c\u6765\u770b\u770b\u5b9e\u9645\u7f16\u7801\u662f\u600e\u4e48\u7528Netty\u7684\u3002<\/span><\/p>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">\u5b66\u4e60\u7f16\u7a0b\u8bed\u8a00\u65f6\uff0c\u6211\u4eec\u5f80\u5f80\u4f1a\u5148\u5199\u4e2aHelloWorld\uff0c\u800c\u5728\u7f51\u7edc\u901a\u4fe1\u91cc\uff0c\u8fd9\u4e2a\u201cHelloWorld\u201d\u7a0b\u5e8f\u5c31\u662fEcho\u670d\u52a1\uff0c\u4e5f\u5c31\u662fA\u53d1\u9001\u4efb\u610f\u4e00\u4e2a\u6d88\u606f\u7ed9B\uff0cB\u5c06\u539f\u5c01\u4e0d\u52a8\u7684\u628a\u8fd9\u6761\u6d88\u606f\u8fd4\u56de\u7ed9A\u3002<\/span><\/p>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">\u5b66\u4e60\u5982\u4f55\u4f7f\u7528Netty\uff0c\u6700\u5178\u578b\u3001\u6700\u6743\u5a01\u7684\u5f53\u5c5eNetty\u81ea\u5df1\u63d0\u4f9b\u7684\u8303\u4f8b\uff0c\u6211\u4eec\u53ef\u4ee5\u5728Netty\u6e90\u7801\u4e2d\u627e\u5230\u8fd9\u4e9b\u4f8b\u5b50\uff0c\u53c2\u89c1<\/span><span class=\"md-link md-pair-s\" spellcheck=\"false\"><a href=\"https:\/\/github.com\/netty\/netty\">https:\/\/github.com\/netty\/netty<\/a><\/span><span class=\"md-plain\">\u9879\u76ee\u4e2d\u7684example\u6587\u4ef6\u5939\u3002<\/span><\/p>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">\u6ce8\uff1a\u4e00\u822c\u6bd4\u8f83\u5b8c\u5907\u7684\u5f00\u6e90\u9879\u76ee\uff0c\u90fd\u4f1a\u5728\u4ee3\u7801\u4e2d\u7ed9\u51fa\u4f7f\u7528\u8303\u4f8b\uff0c\u81f3\u5c11\u6709\u5355\u5143\u6d4b\u8bd5\u4f9b\u5927\u5bb6\u5b66\u4e60\u53c2\u8003\u3002<\/span><\/p>\n<h3 class=\"md-end-block md-heading\"><span class=\"md-plain\">\u5173\u952e\u70b9<\/span><\/h3>\n<ul class=\"ul-list\" data-mark=\"-\">\n<li class=\"md-list-item\">\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">\u5982\u679c NettybossGroup \u53ea\u76d1\u542c\u4e00\u4e2a\u7aef\u53e3\uff0c\u90a3 bossGroup \u53ea\u9700\u8981 1 \u4e2a EventLoop \u5c31\u53ef\u4ee5\u4e86\uff0c\u591a\u4e86\u7eaf\u5c5e\u6d6a\u8d39\u3002<\/span><\/p>\n<\/li>\n<li class=\"md-list-item\">\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0cNetty \u4f1a\u521b\u5efa\u201c2*CPU \u6838\u6570\u201d\u4e2a EventLoop\uff0c\u7531\u4e8e\u7f51\u7edc\u8fde\u63a5\u4e0e EventLoop \u6709\u7a33\u5b9a\u7684\u5173\u7cfb\uff0c\u6240\u4ee5\u4e8b\u4ef6\u5904\u7406\u5668\u5728\u5904\u7406\u7f51\u7edc\u4e8b\u4ef6\u7684\u65f6\u5019\u662f\u4e0d\u80fd\u6709\u963b\u585e\u64cd\u4f5c\u7684\uff0c\u5426\u5219\u5f88\u5bb9\u6613\u5bfc\u81f4\u8bf7\u6c42\u5927\u9762\u79ef\u8d85\u65f6\u3002\u5982\u679c\u5b9e\u5728\u65e0\u6cd5\u907f\u514d\u4f7f\u7528\u963b\u585e\u64cd\u4f5c\uff0c\u90a3\u53ef\u4ee5\u901a\u8fc7\u7ebf\u7a0b\u6c60\u6765\u5f02\u6b65\u5904\u7406\u3002<\/span><\/p>\n<\/li>\n<\/ul>\n<h3 class=\"md-end-block md-heading\"><span class=\"md-plain\">Server\u7aef<\/span><\/h3>\n<pre class=\"md-fences md-end-block ty-contain-cm modeLoaded\" lang=\"java\" spellcheck=\"false\"><span role=\"presentation\"><span class=\"cm-keyword\">public<\/span> <span class=\"cm-keyword\">final<\/span> <span class=\"cm-keyword\">class<\/span> <span class=\"cm-def\">EchoServer<\/span> {<\/span>\r\n<span role=\"presentation\">\u200b<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0<span class=\"cm-keyword\">static<\/span> <span class=\"cm-keyword\">final<\/span> <span class=\"cm-variable-3\">boolean<\/span> <span class=\"cm-variable\">SSL<\/span> <span class=\"cm-operator\">=<\/span> <span class=\"cm-variable\">System<\/span>.<span class=\"cm-variable\">getProperty<\/span>(<span class=\"cm-string\">\"ssl\"<\/span>) <span class=\"cm-operator\">!=<\/span> <span class=\"cm-atom\">null<\/span>;<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0<span class=\"cm-keyword\">static<\/span> <span class=\"cm-keyword\">final<\/span> <span class=\"cm-variable-3\">int<\/span> <span class=\"cm-variable\">PORT<\/span> <span class=\"cm-operator\">=<\/span> <span class=\"cm-variable-3\">Integer<\/span>.<span class=\"cm-variable\">parseInt<\/span>(<span class=\"cm-variable\">System<\/span>.<span class=\"cm-variable\">getProperty<\/span>(<span class=\"cm-string\">\"port\"<\/span>, <span class=\"cm-string\">\"8007\"<\/span>));<\/span>\r\n<span role=\"presentation\">\u200b<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0<span class=\"cm-keyword\">public<\/span> <span class=\"cm-keyword\">static<\/span> <span class=\"cm-variable-3\">void<\/span> <span class=\"cm-variable\">main<\/span>(<span class=\"cm-variable-3\">String<\/span>[] <span class=\"cm-variable\">args<\/span>) <span class=\"cm-keyword\">throws<\/span> <span class=\"cm-variable\">Exception<\/span> {<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-comment\">\/\/ Configure SSL.<\/span><\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-keyword\">final<\/span> <span class=\"cm-variable\">SslContext<\/span> <span class=\"cm-variable\">sslCtx<\/span>;<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-keyword\">if<\/span> (<span class=\"cm-variable\">SSL<\/span>) {<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-variable\">SelfSignedCertificate<\/span> <span class=\"cm-variable\">ssc<\/span> <span class=\"cm-operator\">=<\/span> <span class=\"cm-keyword\">new<\/span> <span class=\"cm-variable\">SelfSignedCertificate<\/span>();<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-variable\">sslCtx<\/span> <span class=\"cm-operator\">=<\/span> <span class=\"cm-variable\">SslContextBuilder<\/span>.<span class=\"cm-variable\">forServer<\/span>(<span class=\"cm-variable\">ssc<\/span>.<span class=\"cm-variable\">certificate<\/span>(), <span class=\"cm-variable\">ssc<\/span>.<span class=\"cm-variable\">privateKey<\/span>()).<span class=\"cm-variable\">build<\/span>();<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0  } <span class=\"cm-keyword\">else<\/span> {<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-variable\">sslCtx<\/span> <span class=\"cm-operator\">=<\/span> <span class=\"cm-atom\">null<\/span>;<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0  }<\/span>\r\n<span role=\"presentation\">\u200b<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-comment\">\/\/ Configure the server.<\/span><\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-variable\">EventLoopGroup<\/span> <span class=\"cm-variable\">bossGroup<\/span> <span class=\"cm-operator\">=<\/span> <span class=\"cm-keyword\">new<\/span> <span class=\"cm-variable\">NioEventLoopGroup<\/span>(<span class=\"cm-number\">1<\/span>);<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-variable\">EventLoopGroup<\/span> <span class=\"cm-variable\">workerGroup<\/span> <span class=\"cm-operator\">=<\/span> <span class=\"cm-keyword\">new<\/span> <span class=\"cm-variable\">NioEventLoopGroup<\/span>();<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-keyword\">final<\/span> <span class=\"cm-variable\">EchoServerHandler<\/span> <span class=\"cm-variable\">serverHandler<\/span> <span class=\"cm-operator\">=<\/span> <span class=\"cm-keyword\">new<\/span> <span class=\"cm-variable\">EchoServerHandler<\/span>();<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-keyword\">try<\/span> {<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-variable\">ServerBootstrap<\/span> <span class=\"cm-variable\">b<\/span> <span class=\"cm-operator\">=<\/span> <span class=\"cm-keyword\">new<\/span> <span class=\"cm-variable\">ServerBootstrap<\/span>();<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-variable\">b<\/span>.<span class=\"cm-variable\">group<\/span>(<span class=\"cm-variable\">bossGroup<\/span>, <span class=\"cm-variable\">workerGroup<\/span>)<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 .<span class=\"cm-variable\">channel<\/span>(<span class=\"cm-variable\">NioServerSocketChannel<\/span>.<span class=\"cm-keyword\">class<\/span>)<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 .<span class=\"cm-variable\">option<\/span>(<span class=\"cm-variable\">ChannelOption<\/span>.<span class=\"cm-variable\">SO_BACKLOG<\/span>, <span class=\"cm-number\">100<\/span>)<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 .<span class=\"cm-variable\">handler<\/span>(<span class=\"cm-keyword\">new<\/span> <span class=\"cm-variable\">LoggingHandler<\/span>(<span class=\"cm-variable\">LogLevel<\/span>.<span class=\"cm-variable\">INFO<\/span>))<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 .<span class=\"cm-variable\">childHandler<\/span>(<span class=\"cm-keyword\">new<\/span> <span class=\"cm-variable\">ChannelInitializer<\/span><span class=\"cm-operator\">&lt;<\/span><span class=\"cm-variable\">SocketChannel<\/span><span class=\"cm-operator\">&gt;<\/span>() {<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 <span class=\"cm-meta\">@Override<\/span><\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 <span class=\"cm-keyword\">public<\/span> <span class=\"cm-variable-3\">void<\/span> <span class=\"cm-variable\">initChannel<\/span>(<span class=\"cm-variable\">SocketChannel<\/span> <span class=\"cm-variable\">ch<\/span>) <span class=\"cm-keyword\">throws<\/span> <span class=\"cm-variable\">Exception<\/span> {<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 <span class=\"cm-variable\">ChannelPipeline<\/span> <span class=\"cm-variable\">p<\/span> <span class=\"cm-operator\">=<\/span> <span class=\"cm-variable\">ch<\/span>.<span class=\"cm-variable\">pipeline<\/span>();<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 <span class=\"cm-keyword\">if<\/span> (<span class=\"cm-variable\">sslCtx<\/span> <span class=\"cm-operator\">!=<\/span> <span class=\"cm-atom\">null<\/span>) {<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 <span class=\"cm-variable\">p<\/span>.<span class=\"cm-variable\">addLast<\/span>(<span class=\"cm-variable\">sslCtx<\/span>.<span class=\"cm-variable\">newHandler<\/span>(<span class=\"cm-variable\">ch<\/span>.<span class=\"cm-variable\">alloc<\/span>()));<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 <span class=\"cm-comment\">\/\/p.addLast(new LoggingHandler(LogLevel.INFO));<\/span><\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 <span class=\"cm-variable\">p<\/span>.<span class=\"cm-variable\">addLast<\/span>(<span class=\"cm-variable\">serverHandler<\/span>);<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 });<\/span>\r\n<span role=\"presentation\">\u200b<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-comment\">\/\/ Start the server.<\/span><\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-variable\">ChannelFuture<\/span> <span class=\"cm-variable\">f<\/span> <span class=\"cm-operator\">=<\/span> <span class=\"cm-variable\">b<\/span>.<span class=\"cm-variable\">bind<\/span>(<span class=\"cm-variable\">PORT<\/span>).<span class=\"cm-variable\">sync<\/span>();<\/span>\r\n<span role=\"presentation\">\u200b<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-comment\">\/\/ Wait until the server socket is closed.<\/span><\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-variable\">f<\/span>.<span class=\"cm-variable\">channel<\/span>().<span class=\"cm-variable\">closeFuture<\/span>().<span class=\"cm-variable\">sync<\/span>();<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0  } <span class=\"cm-keyword\">finally<\/span> {<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-comment\">\/\/ Shut down all event loops to terminate all threads.<\/span><\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-variable\">bossGroup<\/span>.<span class=\"cm-variable\">shutdownGracefully<\/span>();<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-variable\">workerGroup<\/span>.<span class=\"cm-variable\">shutdownGracefully<\/span>();<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0  }<\/span>\r\n<span role=\"presentation\"> \u00a0  }<\/span>\r\n<span role=\"presentation\">}<\/span>\r\n<span role=\"presentation\">\u200b<\/span>\r\n<span role=\"presentation\"><span class=\"cm-meta\">@Sharable<\/span><\/span>\r\n<span role=\"presentation\"><span class=\"cm-keyword\">public<\/span> <span class=\"cm-keyword\">class<\/span> <span class=\"cm-def\">EchoServerHandler<\/span> <span class=\"cm-keyword\">extends<\/span> <span class=\"cm-variable\">ChannelInboundHandlerAdapter<\/span> {<\/span>\r\n<span role=\"presentation\">\u200b<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0<span class=\"cm-meta\">@Override<\/span><\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0<span class=\"cm-keyword\">public<\/span> <span class=\"cm-variable-3\">void<\/span> <span class=\"cm-variable\">channelRead<\/span>(<span class=\"cm-variable\">ChannelHandlerContext<\/span> <span class=\"cm-variable\">ctx<\/span>, <span class=\"cm-variable-3\">Object<\/span> <span class=\"cm-variable\">msg<\/span>) {<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-variable\">ctx<\/span>.<span class=\"cm-variable\">write<\/span>(<span class=\"cm-variable\">msg<\/span>);<\/span>\r\n<span role=\"presentation\"> \u00a0  }<\/span>\r\n<span role=\"presentation\">\u200b<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0<span class=\"cm-meta\">@Override<\/span><\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0<span class=\"cm-keyword\">public<\/span> <span class=\"cm-variable-3\">void<\/span> <span class=\"cm-variable\">channelReadComplete<\/span>(<span class=\"cm-variable\">ChannelHandlerContext<\/span> <span class=\"cm-variable\">ctx<\/span>) {<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-variable\">ctx<\/span>.<span class=\"cm-variable\">flush<\/span>();<\/span>\r\n<span role=\"presentation\"> \u00a0  }<\/span>\r\n<span role=\"presentation\">\u200b<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0<span class=\"cm-meta\">@Override<\/span><\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0<span class=\"cm-keyword\">public<\/span> <span class=\"cm-variable-3\">void<\/span> <span class=\"cm-variable\">exceptionCaught<\/span>(<span class=\"cm-variable\">ChannelHandlerContext<\/span> <span class=\"cm-variable\">ctx<\/span>, <span class=\"cm-variable\">Throwable<\/span> <span class=\"cm-variable\">cause<\/span>) {<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-comment\">\/\/ Close the connection when an exception is raised.<\/span><\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-variable\">cause<\/span>.<span class=\"cm-variable\">printStackTrace<\/span>();<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-variable\">ctx<\/span>.<span class=\"cm-variable\">close<\/span>();<\/span>\r\n<span role=\"presentation\"> \u00a0  }<\/span>\r\n<span role=\"presentation\">}<\/span>\r\n<span role=\"presentation\">\u200b<\/span><\/pre>\n<pre class=\"md-fences md-end-block ty-contain-cm modeLoaded\" lang=\"java\" spellcheck=\"false\"><span role=\"presentation\"><span class=\"cm-comment\">\/**<\/span><\/span>\r\n<span role=\"presentation\"><span class=\"cm-comment\">\u6b63\u5e38\u60c5\u51b5\u4e0b\u6bcf\u4e2a Channel\u81ea\u5df1\u7684 ChannelPipeline\u7ba1\u7406\u7684\u540c\u4e00\u4e2aChannelHandler Class\u5bf9\u8c61\u7684\u5b9e\u4f8b\u90fd\u662f\u76f4\u63a5new\u7684\u4e00\u4e2a\u65b0\u5b9e\u4f8b\uff0c\u4e5f\u5c31\u662f\u539f\u578b\u6a21\u5f0f\uff0c\u800c\u4e0d\u662f\u5355\u4f8b\u6a21\u5f0f\u3002<\/span><\/span>\r\n<span role=\"presentation\"><span class=\"cm-comment\">@Sharable \u8868\u793a\u5f53\u524dhandler\u5c06\u88ab\u7528\u4e8e\u591a\u4e2aChannelPipeline\uff08\u5355\u4f8b\u6a21\u5f0f\uff09<\/span><\/span>\r\n<span role=\"presentation\"><span class=\"cm-comment\">*\/<\/span><\/span>\r\n<span role=\"presentation\"><span class=\"cm-meta\">@Sharable<\/span><\/span>\r\n<span role=\"presentation\"><span class=\"cm-keyword\">public<\/span> <span class=\"cm-keyword\">class<\/span> <span class=\"cm-def\">EchoServerHandler<\/span> <span class=\"cm-keyword\">extends<\/span> <span class=\"cm-variable\">ChannelInboundHandlerAdapter<\/span> {<\/span>\r\n<span role=\"presentation\">\u200b<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0<span class=\"cm-meta\">@Override<\/span><\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0<span class=\"cm-keyword\">public<\/span> <span class=\"cm-variable-3\">void<\/span> <span class=\"cm-variable\">channelRead<\/span>(<span class=\"cm-variable\">ChannelHandlerContext<\/span> <span class=\"cm-variable\">ctx<\/span>, <span class=\"cm-variable-3\">Object<\/span> <span class=\"cm-variable\">msg<\/span>) {<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-variable\">ctx<\/span>.<span class=\"cm-variable\">write<\/span>(<span class=\"cm-variable\">msg<\/span>);<\/span>\r\n<span role=\"presentation\"> \u00a0  }<\/span>\r\n<span role=\"presentation\">\u200b<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0<span class=\"cm-meta\">@Override<\/span><\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0<span class=\"cm-keyword\">public<\/span> <span class=\"cm-variable-3\">void<\/span> <span class=\"cm-variable\">channelReadComplete<\/span>(<span class=\"cm-variable\">ChannelHandlerContext<\/span> <span class=\"cm-variable\">ctx<\/span>) {<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-variable\">ctx<\/span>.<span class=\"cm-variable\">flush<\/span>();<\/span>\r\n<span role=\"presentation\"> \u00a0  }<\/span>\r\n<span role=\"presentation\">\u200b<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0<span class=\"cm-meta\">@Override<\/span><\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0<span class=\"cm-keyword\">public<\/span> <span class=\"cm-variable-3\">void<\/span> <span class=\"cm-variable\">exceptionCaught<\/span>(<span class=\"cm-variable\">ChannelHandlerContext<\/span> <span class=\"cm-variable\">ctx<\/span>, <span class=\"cm-variable\">Throwable<\/span> <span class=\"cm-variable\">cause<\/span>) {<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-comment\">\/\/ Close the connection when an exception is raised.<\/span><\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-variable\">cause<\/span>.<span class=\"cm-variable\">printStackTrace<\/span>();<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-variable\">ctx<\/span>.<span class=\"cm-variable\">close<\/span>();<\/span>\r\n<span role=\"presentation\"> \u00a0  }<\/span>\r\n<span role=\"presentation\">}<\/span><\/pre>\n<h3 class=\"md-end-block md-heading\"><span class=\"md-plain\">Client\u7aef<\/span><\/h3>\n<pre class=\"md-fences md-end-block ty-contain-cm modeLoaded\" lang=\"java \" spellcheck=\"false\"><span role=\"presentation\"><span class=\"cm-keyword\">public<\/span> <span class=\"cm-keyword\">final<\/span> <span class=\"cm-keyword\">class<\/span> <span class=\"cm-def\">EchoClient<\/span> {<\/span>\r\n<span role=\"presentation\">\u200b<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0<span class=\"cm-keyword\">static<\/span> <span class=\"cm-keyword\">final<\/span> <span class=\"cm-variable-3\">boolean<\/span> <span class=\"cm-variable\">SSL<\/span> <span class=\"cm-operator\">=<\/span> <span class=\"cm-variable\">System<\/span>.<span class=\"cm-variable\">getProperty<\/span>(<span class=\"cm-string\">\"ssl\"<\/span>) <span class=\"cm-operator\">!=<\/span> <span class=\"cm-atom\">null<\/span>;<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0<span class=\"cm-keyword\">static<\/span> <span class=\"cm-keyword\">final<\/span> <span class=\"cm-variable-3\">String<\/span> <span class=\"cm-variable\">HOST<\/span> <span class=\"cm-operator\">=<\/span> <span class=\"cm-variable\">System<\/span>.<span class=\"cm-variable\">getProperty<\/span>(<span class=\"cm-string\">\"host\"<\/span>, <span class=\"cm-string\">\"127.0.0.1\"<\/span>);<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0<span class=\"cm-keyword\">static<\/span> <span class=\"cm-keyword\">final<\/span> <span class=\"cm-variable-3\">int<\/span> <span class=\"cm-variable\">PORT<\/span> <span class=\"cm-operator\">=<\/span> <span class=\"cm-variable-3\">Integer<\/span>.<span class=\"cm-variable\">parseInt<\/span>(<span class=\"cm-variable\">System<\/span>.<span class=\"cm-variable\">getProperty<\/span>(<span class=\"cm-string\">\"port\"<\/span>, <span class=\"cm-string\">\"8007\"<\/span>));<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0<span class=\"cm-keyword\">static<\/span> <span class=\"cm-keyword\">final<\/span> <span class=\"cm-variable-3\">int<\/span> <span class=\"cm-variable\">SIZE<\/span> <span class=\"cm-operator\">=<\/span> <span class=\"cm-variable-3\">Integer<\/span>.<span class=\"cm-variable\">parseInt<\/span>(<span class=\"cm-variable\">System<\/span>.<span class=\"cm-variable\">getProperty<\/span>(<span class=\"cm-string\">\"size\"<\/span>, <span class=\"cm-string\">\"256\"<\/span>));<\/span>\r\n<span role=\"presentation\">\u200b<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0<span class=\"cm-keyword\">public<\/span> <span class=\"cm-keyword\">static<\/span> <span class=\"cm-variable-3\">void<\/span> <span class=\"cm-variable\">main<\/span>(<span class=\"cm-variable-3\">String<\/span>[] <span class=\"cm-variable\">args<\/span>) <span class=\"cm-keyword\">throws<\/span> <span class=\"cm-variable\">Exception<\/span> {<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-comment\">\/\/ Configure SSL.git<\/span><\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-keyword\">final<\/span> <span class=\"cm-variable\">SslContext<\/span> <span class=\"cm-variable\">sslCtx<\/span>;<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-keyword\">if<\/span> (<span class=\"cm-variable\">SSL<\/span>) {<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-variable\">sslCtx<\/span> <span class=\"cm-operator\">=<\/span> <span class=\"cm-variable\">SslContextBuilder<\/span>.<span class=\"cm-variable\">forClient<\/span>()<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0  .<span class=\"cm-variable\">trustManager<\/span>(<span class=\"cm-variable\">InsecureTrustManagerFactory<\/span>.<span class=\"cm-variable\">INSTANCE<\/span>).<span class=\"cm-variable\">build<\/span>();<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0  } <span class=\"cm-keyword\">else<\/span> {<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-variable\">sslCtx<\/span> <span class=\"cm-operator\">=<\/span> <span class=\"cm-atom\">null<\/span>;<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0  }<\/span>\r\n<span role=\"presentation\">\u200b<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-comment\">\/\/ Configure the client.<\/span><\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-variable\">EventLoopGroup<\/span> <span class=\"cm-variable\">group<\/span> <span class=\"cm-operator\">=<\/span> <span class=\"cm-keyword\">new<\/span> <span class=\"cm-variable\">NioEventLoopGroup<\/span>();<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-keyword\">try<\/span> {<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-variable\">Bootstrap<\/span> <span class=\"cm-variable\">b<\/span> <span class=\"cm-operator\">=<\/span> <span class=\"cm-keyword\">new<\/span> <span class=\"cm-variable\">Bootstrap<\/span>();<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-variable\">b<\/span>.<span class=\"cm-variable\">group<\/span>(<span class=\"cm-variable\">group<\/span>)<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 .<span class=\"cm-variable\">channel<\/span>(<span class=\"cm-variable\">NioSocketChannel<\/span>.<span class=\"cm-keyword\">class<\/span>)<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 .<span class=\"cm-variable\">option<\/span>(<span class=\"cm-variable\">ChannelOption<\/span>.<span class=\"cm-variable\">TCP_NODELAY<\/span>, <span class=\"cm-atom\">true<\/span>)<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 .<span class=\"cm-variable\">handler<\/span>(<span class=\"cm-keyword\">new<\/span> <span class=\"cm-variable\">ChannelInitializer<\/span><span class=\"cm-operator\">&lt;<\/span><span class=\"cm-variable\">SocketChannel<\/span><span class=\"cm-operator\">&gt;<\/span>() {<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 <span class=\"cm-meta\">@Override<\/span><\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 <span class=\"cm-keyword\">public<\/span> <span class=\"cm-variable-3\">void<\/span> <span class=\"cm-variable\">initChannel<\/span>(<span class=\"cm-variable\">SocketChannel<\/span> <span class=\"cm-variable\">ch<\/span>) <span class=\"cm-keyword\">throws<\/span> <span class=\"cm-variable\">Exception<\/span> {<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 <span class=\"cm-variable\">ChannelPipeline<\/span> <span class=\"cm-variable\">p<\/span> <span class=\"cm-operator\">=<\/span> <span class=\"cm-variable\">ch<\/span>.<span class=\"cm-variable\">pipeline<\/span>();<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 <span class=\"cm-keyword\">if<\/span> (<span class=\"cm-variable\">sslCtx<\/span> <span class=\"cm-operator\">!=<\/span> <span class=\"cm-atom\">null<\/span>) {<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 <span class=\"cm-variable\">p<\/span>.<span class=\"cm-variable\">addLast<\/span>(<span class=\"cm-variable\">sslCtx<\/span>.<span class=\"cm-variable\">newHandler<\/span>(<span class=\"cm-variable\">ch<\/span>.<span class=\"cm-variable\">alloc<\/span>(), <span class=\"cm-variable\">HOST<\/span>, <span class=\"cm-variable\">PORT<\/span>));<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 <span class=\"cm-comment\">\/\/p.addLast(new LoggingHandler(LogLevel.INFO));<\/span><\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 <span class=\"cm-variable\">p<\/span>.<span class=\"cm-variable\">addLast<\/span>(<span class=\"cm-keyword\">new<\/span> <span class=\"cm-variable\">EchoClientHandler<\/span>());<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 });<\/span>\r\n<span role=\"presentation\">\u200b<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-comment\">\/\/ Start the client.<\/span><\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-variable\">ChannelFuture<\/span> <span class=\"cm-variable\">f<\/span> <span class=\"cm-operator\">=<\/span> <span class=\"cm-variable\">b<\/span>.<span class=\"cm-variable\">connect<\/span>(<span class=\"cm-variable\">HOST<\/span>, <span class=\"cm-variable\">PORT<\/span>).<span class=\"cm-variable\">sync<\/span>();<\/span>\r\n<span role=\"presentation\">\u200b<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-comment\">\/\/ Wait until the connection is closed.<\/span><\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-variable\">f<\/span>.<span class=\"cm-variable\">channel<\/span>().<span class=\"cm-variable\">closeFuture<\/span>().<span class=\"cm-variable\">sync<\/span>();<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0  } <span class=\"cm-keyword\">finally<\/span> {<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-comment\">\/\/ Shut down the event loop to terminate all threads.<\/span><\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-variable\">group<\/span>.<span class=\"cm-variable\">shutdownGracefully<\/span>();<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0  }<\/span>\r\n<span role=\"presentation\"> \u00a0  }<\/span>\r\n<span role=\"presentation\">}<\/span><\/pre>\n<pre class=\"md-fences md-end-block ty-contain-cm modeLoaded\" lang=\"java\" spellcheck=\"false\"><span role=\"presentation\"><span class=\"cm-keyword\">public<\/span> <span class=\"cm-keyword\">class<\/span> <span class=\"cm-def\">EchoClientHandler<\/span> <span class=\"cm-keyword\">extends<\/span> <span class=\"cm-variable\">ChannelInboundHandlerAdapter<\/span> {<\/span>\r\n<span role=\"presentation\">\u200b<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0<span class=\"cm-keyword\">private<\/span> <span class=\"cm-keyword\">final<\/span> <span class=\"cm-variable\">ByteBuf<\/span> <span class=\"cm-variable\">firstMessage<\/span>;<\/span>\r\n<span role=\"presentation\">\u200b<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0<span class=\"cm-comment\">\/**<\/span><\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 <span class=\"cm-comment\">* Creates a client-side handler.<\/span><\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 <span class=\"cm-comment\">*\/<\/span><\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0<span class=\"cm-keyword\">public<\/span> <span class=\"cm-variable\">EchoClientHandler<\/span>() {<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-variable\">firstMessage<\/span> <span class=\"cm-operator\">=<\/span> <span class=\"cm-variable\">Unpooled<\/span>.<span class=\"cm-variable\">buffer<\/span>(<span class=\"cm-variable\">EchoClient<\/span>.<span class=\"cm-variable\">SIZE<\/span>);<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-keyword\">for<\/span> (<span class=\"cm-variable-3\">int<\/span> <span class=\"cm-variable\">i<\/span> <span class=\"cm-operator\">=<\/span> <span class=\"cm-number\">0<\/span>; <span class=\"cm-variable\">i<\/span> <span class=\"cm-operator\">&lt;<\/span> <span class=\"cm-variable\">firstMessage<\/span>.<span class=\"cm-variable\">capacity<\/span>(); <span class=\"cm-variable\">i<\/span> <span class=\"cm-operator\">++<\/span>) {<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-variable\">firstMessage<\/span>.<span class=\"cm-variable\">writeByte<\/span>((<span class=\"cm-variable-3\">byte<\/span>) <span class=\"cm-variable\">i<\/span>);<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0  }<\/span>\r\n<span role=\"presentation\"> \u00a0  }<\/span>\r\n<span role=\"presentation\">\u200b<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0<span class=\"cm-meta\">@Override<\/span><\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0<span class=\"cm-keyword\">public<\/span> <span class=\"cm-variable-3\">void<\/span> <span class=\"cm-variable\">channelActive<\/span>(<span class=\"cm-variable\">ChannelHandlerContext<\/span> <span class=\"cm-variable\">ctx<\/span>) {<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-variable\">ctx<\/span>.<span class=\"cm-variable\">writeAndFlush<\/span>(<span class=\"cm-variable\">firstMessage<\/span>);<\/span>\r\n<span role=\"presentation\"> \u00a0  }<\/span>\r\n<span role=\"presentation\">\u200b<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0<span class=\"cm-meta\">@Override<\/span><\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0<span class=\"cm-keyword\">public<\/span> <span class=\"cm-variable-3\">void<\/span> <span class=\"cm-variable\">channelRead<\/span>(<span class=\"cm-variable\">ChannelHandlerContext<\/span> <span class=\"cm-variable\">ctx<\/span>, <span class=\"cm-variable-3\">Object<\/span> <span class=\"cm-variable\">msg<\/span>) {<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-variable\">ctx<\/span>.<span class=\"cm-variable\">write<\/span>(<span class=\"cm-variable\">msg<\/span>);<\/span>\r\n<span role=\"presentation\"> \u00a0  }<\/span>\r\n<span role=\"presentation\">\u200b<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0<span class=\"cm-meta\">@Override<\/span><\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0<span class=\"cm-keyword\">public<\/span> <span class=\"cm-variable-3\">void<\/span> <span class=\"cm-variable\">channelReadComplete<\/span>(<span class=\"cm-variable\">ChannelHandlerContext<\/span> <span class=\"cm-variable\">ctx<\/span>) {<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 <span class=\"cm-variable\">ctx<\/span>.<span class=\"cm-variable\">flush<\/span>();<\/span>\r\n<span role=\"presentation\"> \u00a0  }<\/span>\r\n<span role=\"presentation\">\u200b<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0<span class=\"cm-meta\">@Override<\/span><\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0<span class=\"cm-keyword\">public<\/span> <span class=\"cm-variable-3\">void<\/span> <span class=\"cm-variable\">exceptionCaught<\/span>(<span class=\"cm-variable\">ChannelHandlerContext<\/span> <span class=\"cm-variable\">ctx<\/span>, <span class=\"cm-variable\">Throwable<\/span> <span class=\"cm-variable\">cause<\/span>) {<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-comment\">\/\/ Close the connection when an exception is raised.<\/span><\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-variable\">cause<\/span>.<span class=\"cm-variable\">printStackTrace<\/span>();<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-variable\">ctx<\/span>.<span class=\"cm-variable\">close<\/span>();<\/span>\r\n<span role=\"presentation\"> \u00a0  }<\/span>\r\n<span role=\"presentation\">}<\/span><\/pre>\n<h2 class=\"md-end-block md-heading\"><span class=\"md-plain\">\u53c2\u8003\u8d44\u6599<\/span><\/h2>\n<ul class=\"ul-list\" data-mark=\"-\">\n<li class=\"md-list-item\">\n<p class=\"md-end-block md-p\"><span class=\"md-meta-i-c md-link\"><a spellcheck=\"false\" href=\"https:\/\/www.jianshu.com\/p\/5e90e0a70446\"><span class=\"md-plain\">\u4f60\u771f\u7684\u4e86\u89e3Netty\u4e2d@Sharable\uff1f<\/span><\/a><\/span><\/p>\n<\/li>\n<li class=\"md-list-item\">\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">\u6781\u5ba2\u65f6\u95f4-java\u5e76\u53d1\u7f16\u7a0b\u5b9e\u6218<\/span><\/p>\n<\/li>\n<li class=\"md-list-item\">\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">Scalable IO in Java, Doug Lea<\/span><\/p>\n<\/li>\n<li class=\"md-list-item\">\n<p class=\"md-end-block md-p\"><span class=\"md-meta-i-c md-link\"><a spellcheck=\"false\" href=\"https:\/\/www.jianshu.com\/p\/188ef8462100\"><span class=\"md-plain\">Reactor\u6a21\u5f0f\u8be6\u89e3\uff0b\u6e90\u7801\u5b9e\u73b0<\/span><\/a><\/span><\/p>\n<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u4e0d\u5f97\u4e0d\u8bf4\u7684Reactor\u6a21\u5f0f \u63d0\u5230Netty\uff0c\u5c31\u5fc5\u987b\u5148\u8bf4\u4e00\u4e0bReactor\u6a21\u5f0f\uff0c\u6e90\u5934\u5e94\u8be5\u662fDoug Lea\u5927\u795e <a href='http:\/\/prayerlaputa.com\/?p=853' class='excerpt-more'>[&#8230;]<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0},"categories":[96,102,18],"tags":[31,103,50],"_links":{"self":[{"href":"http:\/\/prayerlaputa.com\/index.php?rest_route=\/wp\/v2\/posts\/853"}],"collection":[{"href":"http:\/\/prayerlaputa.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/prayerlaputa.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/prayerlaputa.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/prayerlaputa.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=853"}],"version-history":[{"count":3,"href":"http:\/\/prayerlaputa.com\/index.php?rest_route=\/wp\/v2\/posts\/853\/revisions"}],"predecessor-version":[{"id":860,"href":"http:\/\/prayerlaputa.com\/index.php?rest_route=\/wp\/v2\/posts\/853\/revisions\/860"}],"wp:attachment":[{"href":"http:\/\/prayerlaputa.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=853"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/prayerlaputa.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=853"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/prayerlaputa.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=853"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}