{"id":1497,"date":"2017-04-17T22:34:01","date_gmt":"2017-04-17T14:34:01","guid":{"rendered":"http:\/\/coderbee.net\/?p=1497"},"modified":"2017-04-17T22:34:01","modified_gmt":"2017-04-17T14:34:01","slug":"%e3%80%8anetty-in-action%e3%80%8b-%e7%ac%ac%e4%b8%89%e7%ab%a0-netty-%e7%bb%84%e4%bb%b6%e5%92%8c%e8%ae%be%e8%ae%a1","status":"publish","type":"post","link":"https:\/\/coderbee.net\/index.php\/framework\/20170417\/1497","title":{"rendered":"\u300aNetty in action\u300b \u7b2c\u4e09\u7ae0 Netty \u7ec4\u4ef6\u548c\u8bbe\u8ba1"},"content":{"rendered":"<h1>\u7b2c\u4e09\u7ae0 Netty \u7ec4\u4ef6\u548c\u8bbe\u8ba1<\/h1>\n<p>\u4ece\u9ad8\u5c42\u89c6\u89d2\uff0cNetty address \u4e24\u4e2a\u7b49\u4ef7\u7684\u5173\u6ce8\u57df\uff1a\u6280\u672f\u548c\u67b6\u6784<br \/>\n* \u9996\u5148\uff0c\u5b83\u662f\u6784\u5efa\u4e8e Java NIO \u4e0a\u7684\u5f02\u6b65\u3001\u4e8b\u4ef6\u9a71\u52a8\u7684\u5b9e\u73b0\uff0c\u4fdd\u8bc1\u4e86\u5728\u9ad8\u8d1f\u8f7d\u4e0b\u6700\u5927\u7684\u5e94\u7528\u6027\u80fd\u548c\u4f38\u7f29\u6027\uff1b<br \/>\n* Netty \u4f53\u73b0\u4e86\u4e00\u7ec4\u8bbe\u8ba1\u6a21\u5f0f\uff0c\u4ece\u7f51\u7edc\u5c42\u89e3\u8026\u5e94\u7528\u903b\u8f91\uff0c\u7b80\u5316\u5f00\u53d1\uff0c\u6700\u5927\u5316\u53ef\u6d4b\u8bd5\u6027\u3001\u6a21\u5757\u5316\u3001\u4ee3\u7801\u91cd\u7528\u3002<\/p>\n<p>\u5f53\u6211\u4eec\u66f4\u7ec6\u5fae\u5730\u5b66\u4e60 Netty \u7684\u72ec\u7acb\u7ec4\u4ef6\u65f6\uff0c\u6211\u4eec\u5c06\u805a\u7126\u4e8e\u5b83\u4eec\u662f\u5982\u4f55\u534f\u4f5c\u6765\u652f\u6301\u8fd9\u4e9b\u67b6\u6784\u6700\u4f73\u5b9e\u8df5\u3002\u901a\u8fc7\u9075\u5faa\u540c\u6837\u7684\u539f\u5219\uff0c\u6211\u4eec\u5c06\u83b7\u5f97 Netty \u80fd\u63d0\u4f9b\u7684\u6240\u6709\u597d\u5904\u3002<\/p>\n<h2>3.1 Channel, EventLoop, ChannelFuture<\/h2>\n<p>Channel, EventLoop, ChannelFuture \u653e\u5230\u4e00\u8d77\uff0c\u53ef\u4ee5\u4ee3\u8868\u4e86 Netty \u7684\u7f51\u7edc\u5c42\u62bd\u8c61\uff1a<\/p>\n<ul>\n<li>Channel: Sockets<\/li>\n<li>EventLoop: \u63a7\u5236\u6d41\uff0c\u591a\u7ebf\u7a0b\uff0c\u5e76\u53d1<\/li>\n<li>ChannelFuture: \u5f02\u6b65\u901a\u77e5<\/li>\n<\/ul>\n<h3>3.1.1 Channel \u63a5\u53e3<\/h3>\n<p>\u57fa\u672c\u7684 I\/O \u64cd\u4f5c\uff08bind(), connect(), read(), write()\uff09 \u4f9d\u8d56\u4e8e\u5e95\u5c42\u7f51\u7edc\u4f20\u8f93\u7684\u63d0\u4f9b\u7684\u539f\u5b50\u64cd\u4f5c\u3002\u5728\u57fa\u4e8e Java \u7684\u7f51\u7edc\u91cc\uff0c\u57fa\u7840\u7ed3\u6784\u662f <code>Socket<\/code> \u7c7b\u3002Netty \u7684 Channel \u63a5\u53e3\u63d0\u4f9b\u7684 API \u6781\u5927\u7b80\u5316\u4e86\u76f4\u63a5\u64cd\u4f5c Sockets \u7684\u590d\u6742\u5de5\u4f5c\u3002<\/p>\n<h3>3.1.2 EventLoop \u63a5\u53e3<\/h3>\n<p>EventLoop \u5b9a\u4e49\u4e86 Netty \u5904\u7406\u4e00\u4e2a\u8fde\u63a5\u751f\u547d\u5468\u671f\u91cc\u53d1\u751f\u7684\u4e8b\u4ef6\u7684\u6838\u5fc3\u62bd\u8c61\u3002Channel\u3001EventLoop\u3001EventLoopGroup \u4e4b\u95f4\u7684\u5173\u7cfb\u5982\u4e0b\uff1a<\/p>\n<ul>\n<li>\u4e00\u4e2a EventLoopGroup \u5305\u542b\u4e00\u4e2a\u6216\u591a\u4e2a EventLoop\uff1b<\/li>\n<li>\u4e00\u4e2a EventLoop \u5728\u5b83\u7684\u751f\u547d\u5468\u671f\u91cc\u662f\u7ed1\u5b9a\u5230\u5355\u4e00\u7ebf\u7a0b\u7684\uff1b<\/li>\n<li>\u4e00\u4e2a EventLoop \u5904\u7406\u7684\u6240\u6709 I\/O \u4e8b\u4ef6\u90fd\u662f\u5728\u5b83\u7684\u4e13\u7528\u7ebf\u7a0b\u4e0a\u8fdb\u884c\u7684\uff1b<\/li>\n<li>\u4e00\u4e2a Channel \u5728\u5b83\u7684\u751f\u547d\u5468\u671f\u91cc\u662f\u6ce8\u518c\u5230\u5230\u5355\u4e00\u7684 EventLoop\uff1b<\/li>\n<li>\u5355\u4e00\u7684 EventLoop \u53ef\u80fd\u88ab\u8d4b\u7ed9\u4e00\u4e2a\u6216\u591a\u4e2a Channel\u3002<\/li>\n<\/ul>\n<p>\u6ce8\u610f\uff0c\u5728\u8fd9\u79cd\u8bbe\u8ba1\u91cc\uff0c\u7ed9\u5b9a Channel \u7684 I\/O \u4e8b\u4ef6\u90fd\u7531\u540c\u4e00\u4e2a\u7ebf\u7a0b\u6765\u6267\u884c\uff0c\u4e8b\u5b9e\u4e0a\u6d88\u9664\u4e86\u5bf9\u540c\u6b65\u7684\u9700\u8981\u3002<\/p>\n<p><!--more--><\/p>\n<h3>3.1.3 <code>ChannelFuture<\/code> \u63a5\u53e3<\/h3>\n<p>Netty \u91cc\u7684\u6240\u6709 I\/O \u64cd\u4f5c\u90fd\u662f\u5f02\u6b65\u7684\u3002\u56e0\u4e3a\u4e00\u4e2a\u64cd\u4f5c\u53ef\u80fd\u6ca1\u6cd5\u7acb\u5373\u8fd4\u56de\uff0c\u6211\u4eec\u9700\u8981\u4e00\u79cd\u65b9\u6cd5\u6765\u7a0d\u540e\u786e\u5b9a\u5b83\u7684\u7ed3\u679c\u3002\u5904\u4e8e\u8fd9\u79cd\u76ee\u7684\uff0cNetty \u63d0\u4f9b\u4e86 <code>ChannelFuture<\/code> \uff0c\u5b83\u7684 <code>addListener()<\/code> \u65b9\u6cd5\u53ef\u4ee5\u6ce8\u518c <code>ChannelFutureListener<\/code> \u6765\u5728\u64cd\u4f5c\u5b8c\u6210\uff08\u4e0d\u7ba1\u662f\u5426\u6210\u529f\uff09\u65f6\u83b7\u5f97\u901a\u77e5\u3002<\/p>\n<p>\u53ef\u4ee5\u628a <code>ChannelFuture<\/code> \u770b\u4f5c\u662f\u4e00\u4e2a\u5728\u672a\u6765\u6267\u884c\u7684\u64cd\u4f5c\u7684\u7ed3\u679c\u5360\u4f4d\u7b26\u3002\u5b83\u4ec0\u4e48\u65f6\u5019\u6267\u884c\u53d6\u51b3\u4e8e\u591a\u4e2a\u56e0\u7d20\uff0c\u56e0\u6b64\u6ca1\u6cd5\u7cbe\u786e\u9884\u6d4b\uff0c\u4f46\u5b83\u80af\u5b9a\u4f1a\u88ab\u6267\u884c\u3002\u66f4\u8fdb\u4e00\u6b65\uff0c\u5c5e\u4e8e\u540c\u4e00\u4e2a <code>Channel<\/code> \u7684\u6240\u6709\u64cd\u4f5c\u4fdd\u8bc1\u6309\u5b83\u4eec\u53d1\u8d77\u7684\u987a\u5e8f\u6267\u884c\u3002<\/p>\n<h2>3.2 ChannelHandler \u548c ChannelPipeline<\/h2>\n<p>\u8fd9\u4e24\u4e2a\u7ec4\u4ef6\u7528\u4e8e\u7ba1\u7406\u6570\u636e\u6d41\u52a8\u548c\u6267\u884c\u5e94\u7528\u7a0b\u5e8f\u7684\u5904\u7406\u903b\u8f91\u3002<\/p>\n<h3>3.2.1 ChannelHanlder \u63a5\u53e3<\/h3>\n<p>\u4ece\u5e94\u7528\u5f00\u53d1\u8005\u7684\u89d2\u5ea6\uff0cNetty \u7684\u9996\u8981\u7ec4\u4ef6\u662f ChannelHandler\uff0c\u5b83\u4f5c\u4e3a\u6240\u6709\u7528\u4e8e\u5904\u7406\u5165\u7ad9\u3001\u51fa\u7ad9\u6570\u636e\u7684\u5e94\u7528\u7a0b\u5e8f\u903b\u8f91\u7684\u5bb9\u5668\u3002\u4e8b\u5b9e\u4e0a\uff0cChannelHandler \u53ef\u7528\u4e8e\u5904\u7406\u51e0\u4e4e\u6240\u6709\u7684\u64cd\u4f5c\uff0c\u4f8b\u5982\u8fdb\u884c\u6570\u636e\u683c\u5f0f\u8f6c\u6362\u3001\u5904\u7406\u5f02\u5e38\u3002<\/p>\n<p>\u4f8b\u5982\uff0c<code>ChannelInboundHandler<\/code> \u63a5\u6536\u5165\u7ad9\u4e8b\u4ef6\u548c\u88ab\u5e94\u7528\u7a0b\u5e8f\u4e1a\u52a1\u903b\u8f91\u5904\u7406\u7684\u6570\u636e\u3002\u5f53\u4f60\u8981\u53d1\u9001\u54cd\u5e94\u7ed9\u5ba2\u6237\u7aef\u8fde\u63a5\u65f6\uff0c\u4f60\u4e5f\u53ef\u4ee5\u5728 <code>ChannelInboundHandler<\/code> \u4e0a flush \u6570\u636e\u3002\u4f60\u7684\u5e94\u7528\u7684\u4e1a\u52a1\u903b\u8f91\u901a\u5e38\u5b58\u5728\u4e8e\u4e00\u4e2a\u6216\u591a\u4e2a <code>ChannelInboundHandler<\/code> \u3002<\/p>\n<h3>3.2.2 ChannelPipeline \u63a5\u53e3<\/h3>\n<p>ChannelPipeline \u63d0\u4f9b\u4e86\u4e00\u4e2a ChannelHandler \u94fe\u7684\u5bb9\u5668\uff0c\u5b9a\u4e49\u4e86\u4e00\u7ec4 API \u7528\u4e8e\u6cbf\u7740\u8fd9\u4e2a\u94fe\u4f20\u9012\u5165\u7ad9\u548c\u51fa\u7ad9\u4e8b\u4ef6\u3002\u5f53\u4e00\u4e2a Channel \u88ab\u521b\u5efa\u540e\uff0c\u5b83\u81ea\u52a8\u88ab\u8d4b\u4e88\u5b83\u81ea\u5df1\u7684 ChannelPipeline \u3002<\/p>\n<p>ChannelHandler \u6309\u5982\u4e0b\u65b9\u5f0f\u5b89\u88c5\u5230 ChannelPipeline \uff1a<\/p>\n<ul>\n<li>\u4e00\u4e2a ChannelInitializer \u5b9e\u73b0\u88ab\u6ce8\u518c\u5230 ServerBootstrap \u3002<\/li>\n<li><code>ChannelInitializer.initChannel()<\/code> \u88ab\u8c03\u7528\uff0cChannelInitializer \u5b89\u88c5\u4e00\u7ec4 ChannelHandler \u5230 pipeline\u3002<\/li>\n<li>ChannelInitializer \u4ece ChannelPipeline \u79fb\u9664\u5b83\u81ea\u8eab\u3002<\/li>\n<\/ul>\n<p>ChannelHandler \u7279\u610f\u8bbe\u8ba1\u4e3a\u652f\u6301\u5e7f\u6cdb\u7684\u4f7f\u7528\uff0c\u4f60\u53ef\u4ee5\u8ba4\u4e3a\u5b83\u662f\u5904\u7406 \u8fdb\u5165\u3001\u79bb\u5f00 ChannelPipeline \u7684\u4e8b\u4ef6\uff08\u5305\u62ec\u6570\u636e\uff09\u7684\u4efb\u610f\u4ee3\u7801\u7684\u5bb9\u5668\u3002<\/p>\n<p>\u5728 pipeline \u4e2d\u79fb\u52a8\u4e8b\u4ef6\u662f ChannelHandlers \u7684\u5de5\u4f5c\u3002\u8fd9\u4e9b\u5bf9\u8c61\u63a5\u6536\u4e8b\u4ef6\u3001\u6267\u884c\u5b83\u4eec\u5b9e\u73b0\u7684\u5904\u7406\u903b\u8f91\uff0c\u4f20\u9012\u6570\u636e\u7ed9\u94fe\u6761\u7684\u4e0b\u4e00\u4e2a handler \u3002\u5b83\u4eec\u6267\u884c\u7684\u987a\u5e8f\u53d6\u51b3\u4e8e\u5b83\u4eec\u88ab\u6dfb\u52a0\u7684\u987a\u5e8f\u3002<\/p>\n<p>\u56fe 3.3 \u663e\u793a\u4e86\u5165\u7ad9\u548c\u51fa\u7ad9\u5904\u7406\u5668\u88ab\u5b89\u88c5\u5230\u540c\u4e00\u4e2a pipeline\u3002\u5982\u679c\u4e00\u4e2a\u6d88\u606f\u6216\u4efb\u610f\u51c4\u7136\u5165\u7ad9\u4e8b\u4ef6\u88ab\u8bfb\u53d6\uff0c\u5b83\u5c06\u4ece pipeline \u7684\u5934\u90e8\u5f00\u59cb\uff0c\u4f20\u9012\u7ed9\u7b2c\u4e00\u4e2a ChannelInboundHandler \u3002\u8fd9\u4e2a\u5904\u7406\u5668\u53ef\u80fd\u3001\u4e5f\u53ef\u80fd\u4e0d\u5b9e\u9645\u4fee\u6539\u6570\u636e\uff0c\u53d6\u51b3\u4e8e\u5b83\u7684\u5177\u4f53\u529f\u80fd\uff0c\u7136\u540e\u6570\u636e\u88ab\u4f20\u9012\u7ed9\u94fe\u6761\u91cc\u7684\u4e0b\u4e00\u4e2a ChannelInboundHandler \u3002\u6700\u7ec8\uff0c\u6570\u636e\u5c06\u5230\u8fbe pipeline \u7684\u5c3e\u90e8\uff0c\u5728\u8fd9\u91cc\uff0c\u6240\u6709\u7684\u5904\u7406\u90fd\u7ed3\u675f\u4e86\u3002<\/p>\n<p>\u6570\u636e\u7684\u51fa\u7ad9\u8fd0\u52a8\u5728\u6982\u5ff5\u4e0a\u662f\u5b8c\u5168\u4e00\u6837\u7684\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u6570\u636e\u4ece ChannelOutboundHandler \u94fe\u7684\u5c3e\u90e8\u6d41\u8fc7\u94fe\u6761\u76f4\u5230\u5934\u90e8\u3002\u8d85\u51fa\u8fd9\u4e2a\u70b9\u540e\uff0c\u51fa\u7ad9\u6570\u636e\u5c06\u5230\u8fbe\u7f51\u7edc\u4f20\u8f93\uff0c\u8fd9\u91cc\u7684\u662f Socket\u3002\u5178\u578b\u5730\uff0c\u8fd9\u5c06\u89e6\u53d1\u4e00\u4e2a\u5199\u64cd\u4f5c\u3002<\/p>\n<blockquote>\n<p>\u4e00\u4e2a\u4e8b\u4ef6\u5c06\u5411\u524d\u8f6c\u53d1\u7ed9\u5f53\u524d\u94fe\u6761\u91cc\u7684\u4e0b\u4e00\u4e2a handler\uff0c\u901a\u8fc7\u4f7f\u7528 ChannelHandlerContext \u5bf9\u8c61\u3002\u56e0\u4e3a\u6709\u65f6\u5019\u9700\u8981\u5ffd\u7565\u4e00\u4e9b\u4e0d\u6562\u5174\u8da3\u7684\u4e8b\u4ef6\uff0cNetty \u63d0\u4f9b\u4e86\u62bd\u8c61\u57fa\u7c7b ChannelInboundHandlerAdapter \u548c ChannelOutboundHandlerAdapter \u3002\u6bcf\u4e2a\u7c7b\u63d0\u4f9b\u7684\u65b9\u6cd5\u90fd\u7b80\u5355\u5730\u7528 ChannelHandlerContext \u5bf9\u8c61\u7b80\u5355\u5730\u628a\u4e8b\u4ef6\u4f20\u9012\u7ed9\u94fe\u6761\u4e2d\u7684\u4e0b\u4e00\u4e2a handler\u3002<\/p>\n<\/blockquote>\n<p>\u7ed9\u5b9a\u7684\u51fa\u7ad9\u548c\u5165\u7ad9\u64cd\u4f5c\u662f\u4e0d\u540c\u7684\u3002\u867d\u7136\u5165\u7ad9\u548c\u51fa\u7ad9\u7684 handler \u90fd\u6269\u5c55\u81ea ChannelHandler\uff0cNetty \u533a\u5206 ChannelInboundHandler \u548c ChannelOutboundHandler \u7684\u5b9e\u73b0\uff0c\u4fdd\u8bc1\u6570\u636e\u53ea\u5728\u540c\u4e00\u65b9\u5411\u7684 handler \u7c7b\u578b\u4e4b\u95f4\u4f20\u9012\u3002<\/p>\n<p>\u5f53 ChannelHandler \u88ab\u6dfb\u52a0\u5230 ChannelPipeline \uff0c\u5b83\u88ab\u8d4b\u4e88\u4e00\u4e2a ChannelHandlerContext\uff0c\u8868\u793a ChannelHandler \u548c ChannelPipeline \u4e4b\u95f4\u7684\u7ed1\u5b9a\u3002\u867d\u7136\u8fd9\u4e2a\u5bf9\u8c61\u53ef\u7528\u4e8e\u83b7\u53d6\u5e95\u5c42\u7684 Channel\uff0c\u5b83\u901a\u5e38\u7528\u4e8e\u5199\u51fa\u7ad9\u6570\u636e\u3002<\/p>\n<p>\u5728 Netty \u53d1\u9001\u6d88\u606f\u7684\u4e24\u79cd\u65b9\u5f0f\uff1a<br \/>\n*  \u76f4\u63a5\u5199\u5165 Channel \uff1a\u4ece ChannelPipeline \u7684\u5c3e\u90e8\u5f00\u59cb\uff08\u4e5f\u5c31\u662f\u6240\u6709 Handler \u90fd\u6709\u673a\u4f1a\u8fdb\u884c\u5904\u7406\uff09\uff1b<br \/>\n*  \u5199\u5165 ChannelHandlerContext \uff1a\u6d88\u606f\u4ece ChannelPipeline \u4e0b\u4e00\u4e2a\u5904\u7406\u5668\u5f00\u59cb\uff1b<\/p>\n<h3>3.2.3 \u8fd1\u770b ChannelHandler<\/h3>\n<p>\u6709\u5f88\u591a\u79cd\u7c7b\u578b\u7684 ChannelHandler\uff0c\u6bcf\u4e2a\u7684\u529f\u80fd\u5927\u591a\u7531\u5b83\u7684\u7236\u7c7b\u51b3\u5b9a\u3002Netty \u4ee5\u9002\u914d\u5668\u7c7b\u7684\u5f62\u5f0f\u63d0\u4f9b\u4e86\u5f88\u591a\u9ed8\u8ba4\u5904\u7406\u5668\u7684\u5b9e\u73b0\uff0c\u7528\u4e8e\u7b80\u5316\u5e94\u7528\u7a0b\u5e8f\u5904\u7406\u903b\u8f91\u7684\u5f00\u53d1\u3002pipeline \u91cc\u7684\u6bcf\u4e2a ChannelHandler \u8d1f\u8d23\u628a\u4e8b\u4ef6\u6b63\u5411\u4f20\u9012\u5230\u94fe\u91cc\u7684\u4e0b\u4e00\u4e2a\u5904\u7406\u5668\u3002\u9002\u914d\u5668\u7c7b\u548c\u5b83\u7684\u5b50\u7c7b\u81ea\u52a8\u5b8c\u6210\u8fd9\u4e9b\uff0c\u4f60\u53ea\u9700\u8981\u8986\u5199\u5e0c\u671b\u5b9a\u5236\u5316\u4f20\u9012\u65b9\u6cd5\u548c\u4e8b\u4ef6\u3002<\/p>\n<blockquote>\n<p>\u6700\u5e38\u7528\u7684\u7684\u9002\u914d\u5668\uff1a<\/p>\n<ul>\n<li>ChannelHandlerAdapter<\/li>\n<li>ChannelInboundHandlerAdapter<\/li>\n<li>ChannelOutboundHandlerAdapter<\/li>\n<li>ChannelDuplexHandlerAdapter<\/li>\n<\/ul>\n<\/blockquote>\n<h3>3.2.4 Encoder \u548c Decoder<\/h3>\n<p>\u5f53\u4f60\u7528 Netty \u53d1\u9001\u6216\u63a5\u6536\u6d88\u606f\u65f6\uff0c\u6570\u636e\u8f6c\u6362\u53d1\u751f\u4e86\u3002\u5165\u7ad9\u6d88\u606f\u5c06\u88ab \u89e3\u7801\uff1a\u4ece\u5b57\u8282\u8f6c\u6362\u5230\u53e6\u4e00\u4e2a\u683c\u5f0f\uff0c\u901a\u5e38\u662f Java \u5bf9\u8c61\u3002\u5982\u679c\u6d88\u606f\u51fa\u7ad9\uff0c\u5c06\u53d1\u751f\u53d1\u8f6c\uff1a\u6d88\u606f\u5c06\u4ece\u5f53\u524d\u683c\u5f0f\u7f16\u7801\u4e3a\u5b57\u8282\u3002\u8fd9\u4e24\u79cd\u8f6c\u6362\u7684\u7406\u7531\u5f88\u7b80\u5355\uff1a\u7f51\u7edc\u6570\u636e\u603b\u662f\u4e00\u5e8f\u5217\u7684\u5b57\u8282\u3002<\/p>\n<p>\u5404\u79cd\u4e0d\u540c\u7684\u62bd\u8c61\u7c7b\u88ab\u63d0\u4f9b\u7528\u4e8e\u7f16\u7801\u548c\u89e3\u7801\uff0c\u5bf9\u5e94\u4e8e\u5177\u4f53\u7684\u9700\u8981\u3002\u4f8b\u5982\uff0c\u5e94\u7528\u7a0b\u5e8f\u53ef\u80fd\u7528\u4e00\u79cd\u4e2d\u95f4\u683c\u5f0f\uff0c\u4e0d\u8981\u6c42\u6d88\u606f\u7acb\u5373\u8f6c\u6362\u5230\u5b57\u8282\u3002\u4f60\u4ecd\u7136\u9700\u8981\u4e00\u4e2a\u7f16\u7801\u5668\uff0c\u5b83\u5c06\u7ee7\u627f\u81ea\u4e0d\u540c\u7684\u7236\u7c7b\u3002<\/p>\n<p>\u4e25\u683c\u5730\u8bb2\uff0c\u5176\u4ed6\u7684\u5904\u7406\u5668\u4e5f\u53ef\u4ee5\u505a\u7f16\u7801\u5668\u548c\u89e3\u7801\u5668\u7684\u5de5\u4f5c\u3002\u4f46\u6b63\u5982\u5b58\u5728\u90a3\u4e9b\u9002\u914d\u5668\u7528\u4e8e\u7b80\u5316 channel \u5904\u7406\u5668\u7684\u521b\u5efa\uff0cNetty \u63d0\u4f9b\u7684\u6240\u6709\u7f16\u7801\u5668\/\u89e3\u7801\u5668\u8981\u4e48\u662f ChannelInboundHandler \u8981\u4e48\u662f ChannelOutboundHandler \u7684\u5b9e\u73b0\u3002<\/p>\n<p>\u4f60\u5c06\u53d1\u73b0\uff0c\u5bf9\u4e8e\u5165\u7ad9\u6570\u636e\uff0c <code>channelRead<\/code> \u65b9\u6cd5\/\u4e8b\u4ef6\u88ab\u8986\u5199\u3002\u5bf9\u4e8e\u4ece\u5165\u7ad9\u7ba1\u9053\u8bfb\u53d6\u7684\u6bcf\u4e2a\u6d88\u606f\uff0c\u8fd9\u4e2a\u65b9\u6cd5\u5c06\u88ab\u8c03\u7528\u3002\u7136\u540e\u8c03\u7528\u89e3\u7801\u5668\u63d0\u4f9b\u7684 <code>decode()<\/code> \u65b9\u6cd5\uff0c\u7136\u540e\u628a\u89e3\u7801\u5f97\u5230\u7684\u5b57\u8282\u4f20\u9012\u7ed9 pipeline \u91cc\u7684\u4e0b\u4e00\u4e2a ChannelInboundHandler \u3002<\/p>\n<p>\u5bf9\u4e8e\u51fa\u7ad9\u6d88\u606f\u7684\u6a21\u5f0f\u662f\u76f8\u53cd\u7684\uff1a\u4e00\u4e2a\u7f16\u7801\u5668\u628a\u6d88\u606f\u8f6c\u6362\u4e3a\u5b57\u8282\uff0c\u6b63\u5411\u4f20\u9012\u7ed9\u4e0b\u4e00\u4e2a ChannelOutboundHandler \u3002<\/p>\n<h3>3.2.5 SimpleChannelInboundHandler \u62bd\u8c61\u7c7b<\/h3>\n<p>\u901a\u5e38\uff0c\u4f60\u7684\u5e94\u7528\u7a0b\u5e8f\u91c7\u7528\u4e00\u4e2a\u5904\u7406\u5668\u6765\u63a5\u6536\u89e3\u7801\u540e\u7684\u6d88\u606f\uff0c\u5bf9\u6570\u636e\u5e94\u7528\u4e1a\u52a1\u903b\u8f91\u3002\u4e3a\u521b\u5efa\u8fd9\u6837\u4e00\u4e2a ChannelHandler \uff0c\u4f60\u53ea\u9700\u8981\u7ee7\u627f\u81ea\u57fa\u7c7b <code>SimpleChannelInboundHandler&lt;T&gt;<\/code> \uff0c<code>T<\/code> \u662f\u4f60\u60f3\u5904\u7406\u7684 Java \u6d88\u606f\u7c7b\u578b\u3002<\/p>\n<p>\u8fd9\u79cd\u7c7b\u578b\u7684\u5904\u7406\u5668\u6700\u91cd\u8981\u7684\u65b9\u6cd5<\/p>\n<h2>3.3 Boostrapping<\/h2>\n<p>Netty \u7684 bootstrap \u7c7b\u63d0\u4f9b\u4e86\u5e94\u7528\u7684\u7f51\u7edc\u5c42\u914d\u7f6e\u7684\u5bb9\u5668\uff0c\u5b83\u8981\u4e48\u7ed1\u5b9a\u4e00\u4e2a\u8fdb\u7a0b\u5230\u7ed9\u5b9a\u7aef\u53e3\uff0c\u8981\u4e48\u8fde\u63a5\u4e00\u4e2a\u8fdb\u7a0b\u5230\u53e6\u4e00\u4e2a\u8fd0\u884c\u5728\u6307\u5b9a\u4e3b\u673a\u548c\u7aef\u53e3\u7684\u8fdb\u7a0b\u3002<\/p>\n<p>\u201c\u670d\u52a1\u5668\u201d\u662f\u76d1\u542c\u4e00\u4e2a\u6216\u591a\u4e2a\u5165\u7ad9\u7684\u8fdb\u7a0b\uff0c\u7528 <code>ServerBootstrap<\/code>\uff1b\u201c\u5ba2\u6237\u7aef\u201d\u662f\u5efa\u7acb\u8fde\u63a5\uff0c\u7528 <code>Bootstrap<\/code>\u3002<\/p>\n<blockquote>\n<p>\u9762\u5411\u8fde\u63a5\u7684\u534f\u8bae\uff1a\u201c\u8fde\u63a5\u201d\u8fd9\u4e2a\u672f\u8bed\u53ea\u5e94\u7528\u4e8e\u9762\u5411\u8fde\u63a5\u7684\u534f\u8bae\uff0c\u4f8b\u5982 TCP\uff0c\u5b83\u4fdd\u8bc1\u8fde\u63a5\u4e24\u7aef\u4f20\u9012\u7684\u6d88\u606f\u7684\u987a\u5e8f\u3002<\/p>\n<\/blockquote>\n<table>\n<thead>\n<tr>\n<th>Category<\/th>\n<th align=\"right\">Bootstrap<\/th>\n<th align=\"center\">ServerBootstrap<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u7f51\u7edc\u529f\u80fd<\/td>\n<td align=\"right\">\u8fde\u63a5\u5230\u4e00\u4e2a\u8fdc\u7a0b\u4e3b\u673a\u548c\u7aef\u53e3<\/td>\n<td align=\"center\">\u7ed1\u5b9a\u5230\u672c\u5730\u7aef\u53e3<\/td>\n<\/tr>\n<tr>\n<td>EventLoopGroup \u6570\u91cf<\/td>\n<td align=\"right\">1<\/td>\n<td align=\"center\">2<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u4e00\u4e2a\u670d\u52a1\u5668\u9700\u8981\u533a\u5206\u4e24\u7ec4 <code>Channel<\/code>\u3002\u7b2c\u4e00\u7ec4\u5305\u542b\u5355\u4e00\u7684 <code>ServerChannel<\/code>\uff0c\u8868\u793a\u670d\u52a1\u5668\u81ea\u8eab\u6b63\u5728\u76d1\u542c\u7684\u5957\u63a5\u5b57\uff0c\u7ed1\u5b9a\u5230\u4e00\u4e2a\u672c\u5730\u7aef\u53e3\u3002\u7b2c\u4e8c\u7ec4\u5305\u542b\u6240\u6709\u5df2\u7ecf\u521b\u5efa\u7684\u7528\u4e8e\u5904\u7406\u5230\u6765\u7684\u5ba2\u6237\u7aef\u8fde\u63a5\u7684 <code>Channel<\/code> &#8212; \u6bcf\u4e2a\u670d\u52a1\u5668\u5df2\u63a5\u53d7\u7684\u8fde\u63a5\u5bf9\u5e94\u4e00\u4e2a channel\u3002<\/p>\n<h2>3.4 \u603b\u7ed3<\/h2>\n<hr\/>\n<p>\u6b22\u8fce\u5173\u6ce8\u6211\u7684\u5fae\u4fe1\u516c\u4f17\u53f7: <strong>coderbee\u7b14\u8bb0<\/strong>\uff0c\u53ef\u4ee5\u66f4\u53ca\u65f6\u56de\u590d\u4f60\u7684\u8ba8\u8bba\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"258\" height=\"258\" src=\"https:\/\/coderbee.net\/wp-content\/uploads\/2019\/01\/coderbee-note.jpg\" class=\"alignnone size-full wp-image-1707\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u7b2c\u4e09\u7ae0 Netty \u7ec4\u4ef6\u548c\u8bbe\u8ba1 \u4ece\u9ad8\u5c42\u89c6\u89d2\uff0cNetty address \u4e24\u4e2a\u7b49\u4ef7 &hellip; <a href=\"https:\/\/coderbee.net\/index.php\/framework\/20170417\/1497\">\u7ee7\u7eed\u9605\u8bfb <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[255],"tags":[267],"_links":{"self":[{"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/posts\/1497"}],"collection":[{"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/comments?post=1497"}],"version-history":[{"count":2,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/posts\/1497\/revisions"}],"predecessor-version":[{"id":1499,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/posts\/1497\/revisions\/1499"}],"wp:attachment":[{"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/media?parent=1497"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/categories?post=1497"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/tags?post=1497"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}