{"id":37384,"date":"2023-12-11T14:41:15","date_gmt":"2023-12-11T06:41:15","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=37384"},"modified":"2023-12-11T14:41:15","modified_gmt":"2023-12-11T06:41:15","slug":"bio-blocking-i-o%ef%bc%9f","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/12\/11\/bio-blocking-i-o%ef%bc%9f\/","title":{"rendered":"BIO (Blocking I\/O)\uff1f"},"content":{"rendered":"

“`”<\/p>\n

\u540c\u6b65\u963b\u585eI\/O\u6a21\u5f0f\uff0c\u6570\u636e\u7684\u8bfb\u53d6\u5199\u5165\u5fc5\u987b\u963b\u585e\u5728\u4e00\u4e2a\u7ebf\u7a0b\u5185\u7b49\u5f85\u5176\u5b8c\u6210\u3002<\/h3>\n

1.1 \u4f20\u7edf BIO<\/h3>\n

BIO\u901a\u4fe1\uff08\u4e00\u8bf7\u6c42\u4e00\u5e94\u7b54\uff09\u6a21\u578b\u56fe\u5982\u4e0b(\u56fe\u6e90\u7f51\u7edc\uff0c\u539f\u51fa\u5904\u4e0d\u660e)\uff1a<\/p>\n

\"\"\u4f20\u7edfBIO\u901a\u4fe1\u6a21\u578b\u56fe\"\"<\/p>\n

\u91c7\u7528 BIO \u901a\u4fe1\u6a21\u578b<\/strong> \u7684\u670d\u52a1\u7aef\uff0c\u901a\u5e38\u7531\u4e00\u4e2a\u72ec\u7acb\u7684 Acceptor \u7ebf\u7a0b\u8d1f\u8d23\u76d1\u542c\u5ba2\u6237\u7aef\u7684\u8fde\u63a5\u3002\u6211\u4eec\u4e00\u822c\u901a\u8fc7\u5728while(true)<\/code> \u5faa\u73af\u4e2d\u670d\u52a1\u7aef\u4f1a\u8c03\u7528 accept()<\/code> \u65b9\u6cd5\u7b49\u5f85\u63a5\u6536\u5ba2\u6237\u7aef\u7684\u8fde\u63a5\u7684\u65b9\u5f0f\u76d1\u542c\u8bf7\u6c42\uff0c\u8bf7\u6c42\u4e00\u65e6\u63a5\u6536\u5230\u4e00\u4e2a\u8fde\u63a5\u8bf7\u6c42\uff0c\u5c31\u53ef\u4ee5\u5efa\u7acb\u901a\u4fe1\u5957\u63a5\u5b57\u5728\u8fd9\u4e2a\u901a\u4fe1\u5957\u63a5\u5b57\u4e0a\u8fdb\u884c\u8bfb\u5199\u64cd\u4f5c\uff0c\u6b64\u65f6\u4e0d\u80fd\u518d\u63a5\u6536\u5176\u4ed6\u5ba2\u6237\u7aef\u8fde\u63a5\u8bf7\u6c42\uff0c\u53ea\u80fd\u7b49\u5f85\u540c\u5f53\u524d\u8fde\u63a5\u7684\u5ba2\u6237\u7aef\u7684\u64cd\u4f5c\u6267\u884c\u5b8c\u6210\uff0c \u4e0d\u8fc7\u53ef\u4ee5\u901a\u8fc7\u591a\u7ebf\u7a0b\u6765\u652f\u6301\u591a\u4e2a\u5ba2\u6237\u7aef\u7684\u8fde\u63a5\uff0c\u5982\u4e0a\u56fe\u6240\u793a\u3002<\/p>\n

\u5982\u679c\u8981\u8ba9 BIO \u901a\u4fe1\u6a21\u578b<\/strong> \u80fd\u591f\u540c\u65f6\u5904\u7406\u591a\u4e2a\u5ba2\u6237\u7aef\u8bf7\u6c42\uff0c\u5c31\u5fc5\u987b\u4f7f\u7528\u591a\u7ebf\u7a0b\uff08\u4e3b\u8981\u539f\u56e0\u662fsocket.accept()<\/code>\u3001socket.read()<\/code>\u3001socket.write()<\/code> \u6d89\u53ca\u7684\u4e09\u4e2a\u4e3b\u8981\u51fd\u6570\u90fd\u662f\u540c\u6b65\u963b\u585e\u7684\uff09\uff0c\u4e5f\u5c31\u662f\u8bf4\u5b83\u5728\u63a5\u6536\u5230\u5ba2\u6237\u7aef\u8fde\u63a5\u8bf7\u6c42\u4e4b\u540e\u4e3a\u6bcf\u4e2a\u5ba2\u6237\u7aef\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u7ebf\u7a0b\u8fdb\u884c\u94fe\u8def\u5904\u7406\uff0c\u5904\u7406\u5b8c\u6210\u4e4b\u540e\uff0c\u901a\u8fc7\u8f93\u51fa\u6d41\u8fd4\u56de\u5e94\u7b54\u7ed9\u5ba2\u6237\u7aef\uff0c\u7ebf\u7a0b\u9500\u6bc1\u3002\u8fd9\u5c31\u662f\u5178\u578b\u7684 \u4e00\u8bf7\u6c42\u4e00\u5e94\u7b54\u901a\u4fe1\u6a21\u578b<\/strong> \u3002\u6211\u4eec\u53ef\u4ee5\u8bbe\u60f3\u4e00\u4e0b\u5982\u679c\u8fd9\u4e2a\u8fde\u63a5\u4e0d\u505a\u4efb\u4f55\u4e8b\u60c5\u7684\u8bdd\u5c31\u4f1a\u9020\u6210\u4e0d\u5fc5\u8981\u7684\u7ebf\u7a0b\u5f00\u9500\uff0c\u4e0d\u8fc7\u53ef\u4ee5\u901a\u8fc7 \u7ebf\u7a0b\u6c60\u673a\u5236<\/strong> \u6539\u5584\uff0c\u7ebf\u7a0b\u6c60\u8fd8\u53ef\u4ee5\u8ba9\u7ebf\u7a0b\u7684\u521b\u5efa\u548c\u56de\u6536\u6210\u672c\u76f8\u5bf9\u8f83\u4f4e\u3002\u4f7f\u7528FixedThreadPool<\/code> \u53ef\u4ee5\u6709\u6548\u7684\u63a7\u5236\u4e86\u7ebf\u7a0b\u7684\u6700\u5927\u6570\u91cf\uff0c\u4fdd\u8bc1\u4e86\u7cfb\u7edf\u6709\u9650\u7684\u8d44\u6e90\u7684\u63a7\u5236\uff0c\u5b9e\u73b0\u4e86N(\u5ba2\u6237\u7aef\u8bf7\u6c42\u6570\u91cf):M(\u5904\u7406\u5ba2\u6237\u7aef\u8bf7\u6c42\u7684\u7ebf\u7a0b\u6570\u91cf)\u7684\u4f2a\u5f02\u6b65I\/O\u6a21\u578b\uff08N \u53ef\u4ee5\u8fdc\u8fdc\u5927\u4e8e M\uff09\uff0c\u4e0b\u9762\u4e00\u8282””\u4f2a\u5f02\u6b65 BIO””\u4e2d\u4f1a\u8be6\u7ec6\u4ecb\u7ecd\u5230\u3002<\/p>\n

\u6211\u4eec\u518d\u8bbe\u60f3\u4e00\u4e0b\u5f53\u5ba2\u6237\u7aef\u5e76\u53d1\u8bbf\u95ee\u91cf\u589e\u52a0\u540e\u8fd9\u79cd\u6a21\u578b\u4f1a\u51fa\u73b0\u4ec0\u4e48\u95ee\u9898\uff1f<\/strong><\/p>\n

\u5728 Java \u865a\u62df\u673a\u4e2d\uff0c\u7ebf\u7a0b\u662f\u5b9d\u8d35\u7684\u8d44\u6e90\uff0c\u7ebf\u7a0b\u7684\u521b\u5efa\u548c\u9500\u6bc1\u6210\u672c\u5f88\u9ad8\uff0c\u9664\u6b64\u4e4b\u5916\uff0c\u7ebf\u7a0b\u7684\u5207\u6362\u6210\u672c\u4e5f\u662f\u5f88\u9ad8\u7684\u3002\u5c24\u5176\u5728 Linux \u8fd9\u6837\u7684\u64cd\u4f5c\u7cfb\u7edf\u4e2d\uff0c\u7ebf\u7a0b\u672c\u8d28\u4e0a\u5c31\u662f\u4e00\u4e2a\u8fdb\u7a0b\uff0c\u521b\u5efa\u548c\u9500\u6bc1\u7ebf\u7a0b\u90fd\u662f\u91cd\u91cf\u7ea7\u7684\u7cfb\u7edf\u51fd\u6570\u3002\u5982\u679c\u5e76\u53d1\u8bbf\u95ee\u91cf\u589e\u52a0\u4f1a\u5bfc\u81f4\u7ebf\u7a0b\u6570\u6025\u5267\u81a8\u80c0\u53ef\u80fd\u4f1a\u5bfc\u81f4\u7ebf\u7a0b\u5806\u6808\u6ea2\u51fa\u3001\u521b\u5efa\u65b0\u7ebf\u7a0b\u5931\u8d25\u7b49\u95ee\u9898\uff0c\u6700\u7ec8\u5bfc\u81f4\u8fdb\u7a0b\u5b95\u673a\u6216\u8005\u50f5\u6b7b\uff0c\u4e0d\u80fd\u5bf9\u5916\u63d0\u4f9b\u670d\u52a1\u3002<\/p>\n

1.2 \u4f2a\u5f02\u6b65 IO<\/h3>\n

\u4e3a\u4e86\u89e3\u51b3\u540c\u6b65\u963b\u585eI\/O\u9762\u4e34\u7684\u4e00\u4e2a\u94fe\u8def\u9700\u8981\u4e00\u4e2a\u7ebf\u7a0b\u5904\u7406\u7684\u95ee\u9898\uff0c\u540e\u6765\u6709\u4eba\u5bf9\u5b83\u7684\u7ebf\u7a0b\u6a21\u578b\u8fdb\u884c\u4e86\u4f18\u5316\u4e00\u4e00\u4e00\u540e\u7aef\u901a\u8fc7\u4e00\u4e2a\u7ebf\u7a0b\u6c60\u6765\u5904\u7406\u591a\u4e2a\u5ba2\u6237\u7aef\u7684\u8bf7\u6c42\u63a5\u5165\uff0c\u5f62\u6210\u5ba2\u6237\u7aef\u4e2a\u6570M\uff1a\u7ebf\u7a0b\u6c60\u6700\u5927\u7ebf\u7a0b\u6570N\u7684\u6bd4\u4f8b\u5173\u7cfb\uff0c\u5176\u4e2dM\u53ef\u4ee5\u8fdc\u8fdc\u5927\u4e8eN.\u901a\u8fc7\u7ebf\u7a0b\u6c60\u53ef\u4ee5\u7075\u6d3b\u5730\u8c03\u914d\u7ebf\u7a0b\u8d44\u6e90\uff0c\u8bbe\u7f6e\u7ebf\u7a0b\u7684\u6700\u5927\u503c\uff0c\u9632\u6b62\u7531\u4e8e\u6d77\u91cf\u5e76\u53d1\u63a5\u5165\u5bfc\u81f4\u7ebf\u7a0b\u8017\u5c3d\u3002<\/p>\n

\u4f2a\u5f02\u6b65IO\u6a21\u578b\u56fe(\u56fe\u6e90\u7f51\u7edc\uff0c\u539f\u51fa\u5904\u4e0d\u660e)\uff1a<\/p>\n

\"\"\u4f2a\u5f02\u6b65IO\u6a21\u578b\u56fe\"\"<\/p>\n

\u91c7\u7528\u7ebf\u7a0b\u6c60\u548c\u4efb\u52a1\u961f\u5217\u53ef\u4ee5\u5b9e\u73b0\u4e00\u79cd\u53eb\u505a\u4f2a\u5f02\u6b65\u7684 I\/O \u901a\u4fe1\u6846\u67b6\uff0c\u5b83\u7684\u6a21\u578b\u56fe\u5982\u4e0a\u56fe\u6240\u793a\u3002\u5f53\u6709\u65b0\u7684\u5ba2\u6237\u7aef\u63a5\u5165\u65f6\uff0c\u5c06\u5ba2\u6237\u7aef\u7684 Socket \u5c01\u88c5\u6210\u4e00\u4e2aTask\uff08\u8be5\u4efb\u52a1\u5b9e\u73b0java.lang.Runnable\u63a5\u53e3\uff09\u6295\u9012\u5230\u540e\u7aef\u7684\u7ebf\u7a0b\u6c60\u4e2d\u8fdb\u884c\u5904\u7406\uff0cJDK \u7684\u7ebf\u7a0b\u6c60\u7ef4\u62a4\u4e00\u4e2a\u6d88\u606f\u961f\u5217\u548c N \u4e2a\u6d3b\u8dc3\u7ebf\u7a0b\uff0c\u5bf9\u6d88\u606f\u961f\u5217\u4e2d\u7684\u4efb\u52a1\u8fdb\u884c\u5904\u7406\u3002\u7531\u4e8e\u7ebf\u7a0b\u6c60\u53ef\u4ee5\u8bbe\u7f6e\u6d88\u606f\u961f\u5217\u7684\u5927\u5c0f\u548c\u6700\u5927\u7ebf\u7a0b\u6570\uff0c\u56e0\u6b64\uff0c\u5b83\u7684\u8d44\u6e90\u5360\u7528\u662f\u53ef\u63a7\u7684\uff0c\u65e0\u8bba\u591a\u5c11\u4e2a\u5ba2\u6237\u7aef\u5e76\u53d1\u8bbf\u95ee\uff0c\u90fd\u4e0d\u4f1a\u5bfc\u81f4\u8d44\u6e90\u7684\u8017\u5c3d\u548c\u5b95\u673a\u3002<\/p>\n

\u4f2a\u5f02\u6b65I\/O\u901a\u4fe1\u6846\u67b6\u91c7\u7528\u4e86\u7ebf\u7a0b\u6c60\u5b9e\u73b0\uff0c\u56e0\u6b64\u907f\u514d\u4e86\u4e3a\u6bcf\u4e2a\u8bf7\u6c42\u90fd\u521b\u5efa\u4e00\u4e2a\u72ec\u7acb\u7ebf\u7a0b\u9020\u6210\u7684\u7ebf\u7a0b\u8d44\u6e90\u8017\u5c3d\u95ee\u9898\u3002\u4e0d\u8fc7\u56e0\u4e3a\u5b83\u7684\u5e95\u5c42\u4ecd\u7136\u662f\u540c\u6b65\u963b\u585e\u7684BIO\u6a21\u578b\uff0c\u56e0\u6b64\u65e0\u6cd5\u4ece\u6839\u672c\u4e0a\u89e3\u51b3\u95ee\u9898\u3002<\/p>\n

1.3 \u4ee3\u7801\u793a\u4f8b<\/h3>\n

\u4e0b\u9762\u4ee3\u7801\u4e2d\u6f14\u793a\u4e86BIO\u901a\u4fe1\uff08\u4e00\u8bf7\u6c42\u4e00\u5e94\u7b54\uff09\u6a21\u578b\u3002\u6211\u4eec\u4f1a\u5728\u5ba2\u6237\u7aef\u521b\u5efa\u591a\u4e2a\u7ebf\u7a0b\u4f9d\u6b21\u8fde\u63a5\u670d\u52a1\u7aef\u5e76\u5411\u5176\u53d1\u9001””\u5f53\u524d\u65f6\u95f4+:hello world””\uff0c\u670d\u52a1\u7aef\u4f1a\u4e3a\u6bcf\u4e2a\u5ba2\u6237\u7aef\u7ebf\u7a0b\u521b\u5efa\u4e00\u4e2a\u7ebf\u7a0b\u6765\u5904\u7406\u3002\u4ee3\u7801\u793a\u4f8b\u51fa\u81ea\u95ea\u7535\u4fa0\u7684\u535a\u5ba2\uff0c\u539f\u5730\u5740\u5982\u4e0b\uff1a <\/p>\n

https:\/\/www.jianshu.com\/p\/a4e03835921a<\/a><\/p>\n

\u5ba2\u6237\u7aef<\/strong><\/p>\n

`java\/**   <\/em> @author \u95ea\u7535\u4fa0  @date 2018\u5e7410\u670814\u65e5 <\/em> @Description:\u5ba2\u6237\u7aef *\/public class IOClient {
  public static void main(String[] args) {    \/\/ TODO \u521b\u5efa\u591a\u4e2a\u7ebf\u7a0b\uff0c\u6a21\u62df\u591a\u4e2a\u5ba2\u6237\u7aef\u8fde\u63a5\u670d\u52a1\u7aef    new Thread(() -> {      try {        Socket socket = new Socket(\"\"127.0.0.1\"\", 3333);        while (true) {          try {            socket.getOutputStream().write((new Date() + \"\": hello world\"\").getBytes());            Thread.sleep(2000);          } catch (Exception e) {          }        }      } catch (IOException e) {      }    }).start();
  }
}
`<\/pre>\n
<\/code><\/p>\n
<\/code><\/p>\n
\u670d\u52a1\u7aef<\/strong><\/p>\n
`java\/**  @author \u95ea\u7535\u4fa0 <\/em> @date 2018\u5e7410\u670814\u65e5  @Description: \u670d\u52a1\u7aef <\/em>\/public class IOServer {
  public static void main(String[] args) throws IOException {    \/\/ TODO \u670d\u52a1\u7aef\u5904\u7406\u5ba2\u6237\u7aef\u8fde\u63a5\u8bf7\u6c42    ServerSocket serverSocket = new ServerSocket(3333);
new Thread(() -> {<\/code>
  while (true) {<\/code>
    try {<\/code>
      \/\/ \u963b\u585e\u65b9\u6cd5\u83b7\u53d6\u65b0\u7684\u8fde\u63a5<\/code>
      Socket socket = serverSocket.accept();<\/code><\/code>      \/\/ \u6bcf\u4e00\u4e2a\u65b0\u7684\u8fde\u63a5\u90fd\u521b\u5efa\u4e00\u4e2a\u7ebf\u7a0b\uff0c\u8d1f\u8d23\u8bfb\u53d6\u6570\u636e<\/code>
      new Thread(() -> {<\/code>
        try {<\/code>
          int len;<\/code>
          byte[] data = new byte[1024];<\/code>
          InputStream inputStream = socket.getInputStream();<\/code>
          \/\/ \u6309\u5b57\u8282\u6d41\u65b9\u5f0f\u8bfb\u53d6\u6570\u636e<\/code>
          while ((len = inputStream.read(data)) != -1) {<\/code>
            System.out.println(new String(data, 0, len));<\/code>
          }<\/code>
        } catch (IOException e) {<\/code>
        }<\/code>
      }).start();<\/code><\/code>    } catch (IOException e) {<\/code>
    }<\/code><\/code>  }<\/code>
}).start();<\/code>
  }
}\/\/ \u63a5\u6536\u5230\u5ba2\u6237\u7aef\u8fde\u63a5\u8bf7\u6c42\u4e4b\u540e\u4e3a\u6bcf\u4e2a\u5ba2\u6237\u7aef\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u7ebf\u7a0b\u8fdb\u884c\u94fe\u8def\u5904\u7406
<\/code>`<\/pre>\n
1.4 \u603b\u7ed3<\/h3>\n
\u5728\u6d3b\u52a8\u8fde\u63a5\u6570\u4e0d\u662f\u7279\u522b\u9ad8\uff08\u5c0f\u4e8e\u5355\u673a1000\uff09\u7684\u60c5\u51b5\u4e0b\uff0c\u8fd9\u79cd\u6a21\u578b\u662f\u6bd4\u8f83\u4e0d\u9519\u7684\uff0c\u53ef\u4ee5\u8ba9\u6bcf\u4e00\u4e2a\u8fde\u63a5\u4e13\u6ce8\u4e8e\u81ea\u5df1\u7684 I\/O \u5e76\u4e14\u7f16\u7a0b\u6a21\u578b\u7b80\u5355\uff0c\u4e5f\u4e0d\u7528\u8fc7\u591a\u8003\u8651\u7cfb\u7edf\u7684\u8fc7\u8f7d\u3001\u9650\u6d41\u7b49\u95ee\u9898\u3002\u7ebf\u7a0b\u6c60\u672c\u8eab\u5c31\u662f\u4e00\u4e2a\u5929\u7136\u7684\u6f0f\u6597\uff0c\u53ef\u4ee5\u7f13\u51b2\u4e00\u4e9b\u7cfb\u7edf\u5904\u7406\u4e0d\u4e86\u7684\u8fde\u63a5\u6216\u8bf7\u6c42\u3002\u4f46\u662f\uff0c\u5f53\u9762\u5bf9\u5341\u4e07\u751a\u81f3\u767e\u4e07\u7ea7\u8fde\u63a5\u7684\u65f6\u5019\uff0c\u4f20\u7edf\u7684 BIO \u6a21\u578b\u662f\u65e0\u80fd\u4e3a\u529b\u7684\u3002\u56e0\u6b64\uff0c\u6211\u4eec\u9700\u8981\u4e00\u79cd\u66f4\u9ad8\u6548\u7684 I\/O \u5904\u7406\u6a21\u578b\u6765\u5e94\u5bf9\u66f4\u9ad8\u7684\u5e76\u53d1\u91cf\u3002<\/p>\n
            \"```\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
“`” \u540c\u6b65\u963b\u585eI\/O\u6a21\u5f0f\uff0c\u6570\u636e\u7684\u8bfb\u53d6\u5199\u5165\u5fc5\u987b\u963b\u585e\u5728\u4e00\u4e2a\u7ebf\u7a0b\u5185\u7b49\u5f85\u5176\u5b8c\u6210\u3002 1.1 \u4f20 […]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-37384","post","type-post","status-publish","format-standard","hentry","category-c"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/37384","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=37384"}],"version-history":[{"count":1,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/37384\/revisions"}],"predecessor-version":[{"id":37385,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/37384\/revisions\/37385"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=37384"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=37384"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=37384"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}