{"id":1729,"date":"2020-06-23T17:13:25","date_gmt":"2020-06-23T09:13:25","guid":{"rendered":"http:\/\/39.97.231.10\/?p=1729"},"modified":"2020-06-23T17:13:25","modified_gmt":"2020-06-23T09:13:25","slug":"%e5%88%86%e5%b8%83%e5%bc%8f%e9%94%81%e5%ae%9e%e7%8e%b0%e6%96%b9%e5%bc%8f","status":"publish","type":"post","link":"http:\/\/www.weijing.co\/?p=1729","title":{"rendered":"\u5206\u5e03\u5f0f\u9501\u5b9e\u73b0\u65b9\u5f0f"},"content":{"rendered":"<div>\n<div>\n<div>\u4e00\u3001\u6982\u5ff5<\/div>\n<\/div>\n<\/div>\n<article>\n<blockquote><p>\u5728\u5355\u673a\u73af\u5883\u4e2d\uff0cJava\u63d0\u4f9b\u4e86\u5f88\u591aAPI\u6765\u89e3\u51b3\u5e76\u53d1\u95ee\u9898\uff0c\u5982java.util.concurrent\u5305\u4e0b\uff08\u7b80\u79f0JUC\uff09\u7684\u5de5\u5177\u7c7b\uff0c\u8fd9\u4e9b\u5de5\u5177\u7c7b\u5e95\u5c42\u4e0d\u5916\u4e4e\u4f7f\u7528synchronized\u3001lock\u3001CAS\u3001volatile\u3001AQS\u7b49\u5b9e\u73b0\uff0c\u53ea\u80fd\u7528\u6765\u89e3\u51b3\u540c\u4e00\u8fdb\u7a0b\u4e2d\uff0c\u4e0d\u540c\u7ebf\u7a0b\u5bf9\u540c\u4e00\u8d44\u6e90\u4f7f\u7528\u7684\u5e76\u53d1\u95ee\u9898\uff0c\u800c\u5728\u5206\u5e03\u5f0f\u7684\u90e8\u7f72\u73af\u5883\u4e0b\uff0c\u662f\u591a\u8fdb\u7a0b\u4e4b\u95f4\u8d44\u6e90\u7684\u7ade\u4e89\uff0c\u6240\u4ee5\uff0cJava\u63d0\u4f9b\u7684API\u5728\u5206\u5e03\u5f0f\u573a\u666f\u4e2d\u5c31\u65e0\u80fd\u4e3a\u529b\u4e86\u3002\u9700\u8981\u901a\u8fc7\u5176\u4ed6\u624b\u6bb5\uff0c\u6765\u4fdd\u8bc1\u540c\u4e00\u65f6\u523b\u64cd\u4f5c\u6570\u636e\u7684\u5355\u4e00\u6027\u3002<\/p><\/blockquote>\n<h3>\u4e8c\u3001\u5206\u5e03\u5f0f\u9501\u8981\u6ee1\u8db3\u7684\u51e0\u4e2a\u6761\u4ef6<\/h3>\n<p>1. \u9501\u6392\u4ed6\u6027\uff1a\u540c\u4e00\u65f6\u95f4\uff0c\u53ea\u6709\u4e00\u4e2a\u5ba2\u6237\u7aef\u80fd\u83b7\u5f97\u9501\uff0c\u5176\u4ed6\u5ba2\u6237\u7aef\u65e0\u6cd5\u540c\u65f6\u83b7\u53d6\u5230\u9501<br \/>\n2. \u9ad8\u53ef\u7528\u6027\uff1a\u83b7\u53d6\u6216\u91ca\u653e\u9501\u7684\u673a\u5236\u5fc5\u987b\u662f\u9ad8\u53ef\u7528\u4e14\u6027\u80fd\u4f73<br \/>\n3.\u907f\u514d\u6b7b\u9501\uff1a\u9501\u5728\u4e00\u5b9a\u65f6\u9650\u4e4b\u540e\uff0c\u4e00\u5b9a\u4f1a\u88ab\u91ca\u653e\uff08\u65e0\u8bba\u662f\u6b63\u5e38\u91ca\u653e\u6216\u8005\u5f02\u5e38\u91ca\u653e\uff09<\/p>\n<h3>\u4e09\u3001\u76ee\u524d\u9488\u5bf9\u5206\u5e03\u5f0f\u9501\u5b9e\u73b0\u7684\u51e0\u79cd\u65b9\u6848<\/h3>\n<ul>\n<li>\u57fa\u4e8e\u6570\u636e\u5e93\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501<\/li>\n<li>\u57fa\u4e8e\u7f13\u5b58\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501<\/li>\n<li>\u57fa\u4e8eZookeeper\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501<\/li>\n<\/ul>\n<h4>3.1\u3001\u57fa\u4e8e\u6570\u636e\u5e93\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501<\/h4>\n<h5>3.1.1 \u901a\u8fc7\u65b0\u5efa\u9501\u8868\u6765\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\uff1a<\/h5>\n<ol>\n<li>\u521b\u5efa\u4e00\u5f20\u9501\u8868\uff0c\u8bb0\u5f55\u9501\u5b9a\u7684\u65b9\u6cd5\u540d\u548c\u65f6\u95f4\uff0c\u5e76\u5bf9\u9501\u7684key\u6dfb\u52a0\u552f\u4e00\u6027\u7ea6\u675f\uff0c\u6b64\u5904\u662f\u65b9\u6cd5\u540d\uff0c\u5efa\u8868\u8bed\u53e5\u5982\u4e0b:<\/li>\n<\/ol>\n<div>\n<pre>CREATE TABLE `methodLock` (\n  `id` int(11) NOT NULL AUTO_INCREMENT COMMENT \\'\u4e3b\u952e\\',\n  `method_name` varchar(64) NOT NULL DEFAULT \\'\\' COMMENT \\'\u9501\u5b9a\u7684\u65b9\u6cd5\u540d\\',\n  `desc` varchar(1024) NOT NULL DEFAULT \\'\u5907\u6ce8\u4fe1\u606f\\',\n  `update_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT \\'\u4fdd\u5b58\u6570\u636e\u65f6\u95f4\uff0c\u81ea\u52a8\u751f\u6210\\',\n  PRIMARY KEY (`id`),\n  UNIQUE KEY `uidx_method_name` (`method_name `) USING BTREE\n) ENGINE=InnoDB DEFAULT CHARSET=utf8 COMMENT=\\'\u9501\u5b9a\u4e2d\u7684\u65b9\u6cd5\\';\n<\/pre>\n<\/div>\n<ol start=\\\"2\\\">\n<li>\u60f3\u8981\u9501\u4f4f\u67d0\u4e2a\u65b9\u6cd5\u65f6\uff0c\u5728\u8868\u4e2d\u63d2\u5165\u4e00\u6761\u8bb0\u5f55\uff0c\u6267\u884c\u4ee5\u4e0bSQL\uff1a<\/li>\n<\/ol>\n<div>\n<pre>insert into methodLock(method_name,desc) values (\u2018method_name\u2019,\u2018desc\u2019);\n<\/pre>\n<\/div>\n<p>\u56e0\u4e3a\u6211\u4eec\u5bf9method_name\u505a\u4e86\u552f\u4e00\u6027\u7ea6\u675f\uff0c\u5982\u679c\u540c\u65f6\u6709\u591a\u4e2a\u8bf7\u6c42\u63d0\u4ea4\u5230\u6570\u636e\u5e93\u7684\u8bdd\uff0c\u6570\u636e\u5e93\u4f1a\u4fdd\u8bc1\u53ea\u6709\u4e00\u4e2a\u53ef\u4ee5\u63d2\u5165\u6210\u529f\uff0c\u5176\u4ed6\u7684\u8bf7\u6c42\u5219\u4f1a\u629b\u51fa\u5f02\u5e38\uff0c\u5bf9\u4e8e\u63d2\u5165\u6570\u636e\u6210\u529f\u7684\u7ebf\u7a0b\uff0c\u6211\u8ba4\u4e3a\u4ed6\u83b7\u5f97\u4e86\u540e\u9762\u65b9\u6cd5\u7684\u9501\uff0c\u53ef\u4ee5\u6267\u884c\u4e4b\u540e\u7684\u65b9\u6cd5\u3002<\/p>\n<ol start=\\\"3\\\">\n<li>\u65b9\u6cd5\u6267\u884c\u5b8c\u6bd5\u9700\u8981\u91ca\u653e\u9501\uff0c\u9700\u8981\u6267\u884c\u4ee5\u4e0bSql:<\/li>\n<\/ol>\n<div>\n<pre>delete from methodLock where method_name = \\'method_name\\';\n<\/pre>\n<\/div>\n<h5>3.1.1.2 \u4f18\u7f3a\u70b9\uff1a<\/h5>\n<p>\u4f18\u70b9\uff1a<\/p>\n<ol>\n<li>\u76f4\u63a5\u4f9d\u8d56\u6570\u636e\u5e93\uff0c\u6613\u4e8e\u7406\u89e3<\/li>\n<\/ol>\n<p>\u7f3a\u70b9\uff1a<\/p>\n<ol>\n<li>\u5355\u70b9\u95ee\u9898\uff1a\u9501\u5f3a\u4f9d\u8d56\u6570\u636e\u5e93\u7684\u53ef\u7528\u6027\uff0c\u5982\u679c\u662f\u5355\u70b9\u6570\u636e\u5e93\uff0c\u4e00\u65e6\u6570\u636e\u5e93\u6302\u6389\uff0c\u4f1a\u5bfc\u81f4\u4e1a\u52a1\u7cfb\u7edf\u4e0d\u53ef\u7528\uff0c\u89e3\u51b3\u65b9\u6cd5\uff1a\u642d\u5efa\u6570\u636e\u5e93\u96c6\u7fa4<\/li>\n<li>\u9501\u91ca\u653e\u95ee\u9898\uff1a\u9501\u6ca1\u6709\u5931\u6548\u65f6\u95f4\uff0c\u5f53\u89e3\u9501\u64cd\u4f5c\u5931\u8d25\u6216\u53d1\u751f\u5f02\u5e38\u65f6\uff0c\u9501\u8bb0\u5f55\u5c31\u4f1a\u4e00\u76f4\u5b58\u5728\u8868\u4e2d\uff0c\u5176\u4ed6\u7ebf\u7a0b\u65e0\u6cd5\u518d\u83b7\u5f97\u5230\u9501\uff0c\u89e3\u51b3\u65b9\u6cd5\uff1a\u542f\u52a8\u4e00\u4e2a\u5b9a\u65f6\u4efb\u52a1\uff0c\u5b9a\u65f6\u6e05\u7406\u8fc7\u671f\u6570\u636e\u3002<\/li>\n<\/ol>\n<h5>3.1.1.3 \u9501\u7279\u70b9\uff1a<\/h5>\n<ol>\n<li>\u9501\u662f\u975e\u963b\u585e\u7684\uff1a\u4e0a\u9762\u8bf4\u5230\uff0c\u56e0\u4e3amethod_name\u505a\u4e86\u552f\u4e00\u6027\u7ea6\u675f\uff0c\u540c\u4e00\u65f6\u95f4\u6570\u636e\u5e93\u4f1a\u4fdd\u8bc1\u4e00\u4e2a\u63d2\u5165\u6570\u636e\u6210\u529f\uff0c\u5176\u4ed6\u8bf7\u6c42\u7684\u7ebf\u7a0b\u5219\u4f1a\u629b\u51fa\u5f02\u5e38\uff0c\u5e76\u4e0d\u4f1a\u8fdb\u5165\u7b49\u5f85\u961f\u5217\uff0c\u8981\u60f3\u518d\u6b21\u83b7\u5f97\u9501\u5c31\u8981\u91cd\u65b0\u89e6\u53d1\u83b7\u5f97\u9501\u64cd\u4f5c\u3002\u89e3\u51b3\u65b9\u6cd5\uff1a\u6839\u636e\u5b9e\u9645\u9700\u8981\uff0c\u5982\u679c\u9700\u8981\u83b7\u5f97\u9501\uff0c\u53ef\u4ee5\u5b9e\u73b0while\u5faa\u73af\uff0c\u5c1d\u8bd5\u83b7\u53d6\u9501\uff0c\u76f4\u5230\u6210\u529f\u3002<\/li>\n<li>\u9501\u662f\u975e\u91cd\u5165\u9501\uff1a\u540c\u4e00\u4e2a\u7ebf\u7a0b\u5728\u6ca1\u6709\u91ca\u653e\u9501\u4e4b\u524d\u65e0\u6cd5\u518d\u6b21\u83b7\u5f97\u8be5\u9501\u3002\u56e0\u4e3a\u9501\u8868\u4e2d\u8be5\u6570\u636e\u5df2\u7ecf\u5b58\u5728\u4e86\u3002\u89e3\u51b3\u65b9\u6cd5\uff1a\u5728\u6570\u636e\u5e93\u8868\u4e2d\u52a0\u4e2a\u5b57\u6bb5\uff0c\u8bb0\u5f55\u5f53\u524d\u83b7\u5f97\u9501\u7684\u673a\u5668\u7684\u4e3b\u673a\u4fe1\u606f\u548c\u7ebf\u7a0b\u4fe1\u606f\uff0c\u90a3\u4e48\u4e0b\u6b21\u518d\u83b7\u53d6\u9501\u7684\u65f6\u5019\u5148\u67e5\u8be2\u6570\u636e\u5e93\uff0c\u5982\u679c\u5f53\u524d\u673a\u5668\u7684\u4e3b\u673a\u4fe1\u606f\u548c\u7ebf\u7a0b\u4fe1\u606f\u5728\u6570\u636e\u5e93\u53ef\u4ee5\u67e5\u5230\u7684\u8bdd\uff0c\u76f4\u63a5\u628a\u9501\u5206\u914d\u7ed9\u4ed6\u5c31\u53ef\u4ee5\u4e86\u3002<\/li>\n<\/ol>\n<h5>3.1.2 \u5229\u7528\u6570\u636e\u5e93\u7684\u6392\u4ed6\u9501\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\uff1a<\/h5>\n<p>\u57fa\u4e8eMySql\u7684InnoDB\u5f15\u64ce\uff0c\u53ef\u4ee5\u5728\u67e5\u8be2\u8bed\u53e5\u540e\u9762\u589e\u52a0for update\uff0c\u6570\u636e\u5e93\u4f1a\u5bf9\u67e5\u8be2\u7ed3\u679c\u4e2d\u7684\u6bcf\u884c\u90fd\u52a0\u6392\u4ed6\u9501\uff0c\u5982\u4e0bSQL\uff1a<\/p>\n<div>\n<pre>select * from user_info where user_id = xx for update;\n<\/pre>\n<\/div>\n<p>\u6ce8\u610f\uff1a<br \/>\n\u4f7f\u7528\u6392\u4ed6\u9501\u7684\u65f6\u5019\uff0c\u4e00\u5b9a\u8981\u6709where\u6761\u4ef6\u4fdd\u8bc1\u68c0\u7d22\u7684\u6570\u636e\u8303\u56f4\u6700\u5c0f\uff0c\u901a\u5e38\u9700\u8981\u7ed9user_id\u5217\u6dfb\u52a0\u7d22\u5f15\uff0c\u4fdd\u8bc1InnoDB\u5f15\u64ce\u5728\u52a0\u9501\u7684\u65f6\u5019\u4e0d\u7528\u5168\u8868\u626b\u63cf\uff0c\u56e0\u4e3a\u53ea\u6709\u901a\u8fc7\u7d22\u5f15\u8fdb\u884c\u68c0\u7d22\u7684\u65f6\u5019\u624d\u4f1a\u4f7f\u7528\u884c\u7ea7\u9501\uff0c\u5426\u5219\u4f1a\u4f7f\u7528\u8868\u7ea7\u9501\u3002<br \/>\n\u83b7\u5f97\u6392\u5b83\u9501\u7684\u7ebf\u7a0b\u5373\u53ef\u83b7\u5f97\u5206\u5e03\u5f0f\u9501\uff0c\u4f7f\u7528\u5b8c\u6210\u4e4b\u540e\u518d\u901a\u8fc7connection.commit()\u64cd\u4f5c\u6765\u91ca\u653e\u9501\u3002<\/p>\n<h6>3.1.2.1 \u6392\u4ed6\u9501\u95ee\u9898\uff1a<\/h6>\n<ol>\n<li>MySql\u4f1a\u5bf9\u67e5\u8be2\u8fdb\u884c\u4f18\u5316\uff0c\u662f\u5426\u4f7f\u7528\u7d22\u5f15\u662f\u901a\u8fc7\u5224\u65ad\u4e0d\u540c\u6267\u884c\u8ba1\u5212\u7684\u4ee3\u4ef7\u6765\u51b3\u5b9a\u7684\uff0c\u5982\u679c MySQL \u8ba4\u4e3a\u5168\u8868\u626b\u6548\u7387\u66f4\u9ad8\uff0c\u6bd4\u5982\u5bf9\u4e00\u4e9b\u5f88\u5c0f\u7684\u8868\uff0c\u5b83\u5c31\u4e0d\u4f1a\u4f7f\u7528\u7d22\u5f15\uff0c\u8fd9\u79cd\u60c5\u51b5\u4e0b InnoDB \u5c06\u4f7f\u7528\u8868\u9501\uff0c\u800c\u4e0d\u662f\u884c\u9501\u3002<\/li>\n<li>\u4e00\u4e2a\u6392\u4ed6\u9501\u957f\u65f6\u95f4\u4e0d\u63d0\u4ea4\uff0c\u5c31\u4f1a\u5360\u7528\u6570\u636e\u5e93\u8fde\u63a5\uff0c\u4e00\u65e6\u7c7b\u4f3c\u7684\u8fde\u63a5\u53d8\u5f97\u591a\u4e86\uff0c\u5c31\u53ef\u80fd\u628a\u6570\u636e\u5e93\u8fde\u63a5\u6c60\u6491\u7206\u3002<\/li>\n<\/ol>\n<h5>3.1.3 \u901a\u8fc7\u4e50\u89c2\u9501\u6765\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\uff1a<\/h5>\n<p>\u57fa\u4e8eInnoDB\u5b58\u50a8\u5f15\u64ce\u7684\u8868\uff0c\u901a\u8fc7\u7ed9\u8868\u4e2d\u8ffd\u52a0\u4e00\u4e2a\u7248\u672c\u5b57\u6bb5\u6765\u5b9e\u73b0\uff0c\u6bcf\u6b21\u66f4\u65b0\u6570\u636e\u65f6\uff0c\u628a\u7248\u672c\u4f5c\u4e3a\u6761\u4ef6\u3002\u56e0\u4e3aInnoDB\u9ed8\u8ba4\u4f1a\u4e3ainsert\u3001delete\u3001update\u52a0\u4e0a\u6392\u4ed6\u9501\uff0c\u6240\u4ee5\uff0c\u53ef\u4ee5\u5728\u66f4\u65b0\u6570\u636e\u65f6\uff0c\u4f7f\u7528\u5982\u4e0bSQL\uff1a<\/p>\n<div>\n<pre>update user_info set value = 100 where id = 1 and version = #{version}\n<\/pre>\n<\/div>\n<h5>3.1.3.1 \u4f18\u7f3a\u70b9<\/h5>\n<p>\u4f18\u70b9\uff1a\u6027\u80fd\u6bd4\u60b2\u89c2\u9501\u9ad8<br \/>\n\u7f3a\u70b9\uff1a\u4f1a\u5b58\u5728\u5927\u91cf\u66f4\u65b0\u5931\u8d25\u5f02\u5e38<\/p>\n<h4>3.2\u3001\u57fa\u4e8e\u7f13\u5b58\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501<\/h4>\n<p>\u4ee5Redis\u4e3a\u4f8b\uff0c\u5b9e\u73b0\u7684\u9501\u673a\u5236\uff0c\u4e3b\u8981\u662f\u4f9d\u8d56redis\u81ea\u8eab\u7684\u539f\u5b50\u64cd\u4f5c<\/p>\n<h5>3.2.1 \u7f13\u5b58\u57fa\u4e8eJedis\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501<\/h5>\n<p>\u5355\u70b9\u5b9e\u73b0\uff0c\u901a\u8fc7\u5982\u4e0b\u547d\u4ee4\uff1a<\/p>\n<blockquote><p>SET key value [EX seconds] [PX milliseconds] [NX|XX] \uff08\u6ce8\u610f\uff1aredis\u7248\u672c&gt;=2.6.12\uff09<br \/>\nNX\uff1a\u5f53\u952e\u4e0d\u5b58\u5728\u65f6\uff0c\u624d\u5bf9\u952e\u8fdb\u884c\u8bbe\u7f6e\u64cd\u4f5c\uff0cSET key value NX \u6548\u679c\u7b49\u540c\u4e8e SETNX key value<br \/>\nPX millisecond\uff1a\u8bbe\u7f6e\u952e\u7684\u8fc7\u671f\u65f6\u95f4\u4e3amillisecond\u6beb\u79d2\uff0c\u5f53\u8d85\u8fc7\u8fd9\u4e2a\u65f6\u95f4\u540e\uff0c\u8bbe\u7f6e\u7684\u952e\u4f1a\u81ea\u52a8\u5931\u6548<\/p><\/blockquote>\n<p>\u5bf9\u5e94java\u5b9e\u73b0\uff1a<\/p>\n<ol>\n<li>\u5f15\u5165maven\u7684pom\u4f9d\u8d56\uff1a<\/li>\n<\/ol>\n<div>\n<pre>&lt;dependency&gt;\n    &lt;groupId&gt;redis.clients&lt;\/groupId&gt;\n    &lt;artifactId&gt;jedis&lt;\/artifactId&gt;\n    &lt;version&gt;2.9.0&lt;\/version&gt;\n&lt;\/dependency&gt;\n<\/pre>\n<\/div>\n<ol start=\\\"2\\\">\n<li>\u5177\u4f53\u5b9e\u73b0\uff1a<\/li>\n<\/ol>\n<div>\n<pre>public class RedisTool {\n    private static final String LOCK_SUCCESS = \\\"OK\\\";\n    private static final String SET_IF_NOT_EXIST = \\\"NX\\\";\n    private static final String SET_WITH_EXPIRE_TIME = \\\"PX\\\";\n    \/**\n     * \u5c1d\u8bd5\u83b7\u53d6\u5206\u5e03\u5f0f\u9501\n     * @param jedis Redis\u5ba2\u6237\u7aef\n     * @param lockKey \u9501\n     * @param requestId \u8bf7\u6c42\u6807\u8bc6\n     * @param expireTime \u8d85\u671f\u65f6\u95f4\n     * @return \u662f\u5426\u83b7\u53d6\u6210\u529f\n     *\/\n    public static boolean tryGetDistributedLock(Jedis jedis, String lockKey, String requestId, int expireTime) {\n        String result = jedis.set(lockKey, requestId, SET_IF_NOT_EXIST, SET_WITH_EXPIRE_TIME, expireTime);\n       return LOCK_SUCCESS.equals(result);\n    }\n}\n<\/pre>\n<\/div>\n<p>Java\u4ee3\u7801\uff1ajedis.set(String key, String value, String nxxx, String expx, int time)<br \/>\n\u53c2\u6570\u8bf4\u660e\uff1a<\/p>\n<ul>\n<li>\u7b2c\u4e00\u4e2a\u4e3akey\uff0c\u6211\u4eec\u4f7f\u7528key\u6765\u5f53\u9501\uff0c\u56e0\u4e3akey\u662f\u552f\u4e00\u7684\u3002<\/li>\n<li>\u7b2c\u4e8c\u4e2a\u4e3avalue\uff0c\u6211\u4eec\u4f20\u7684\u662frequestId\uff0c\u5f88\u591a\u7ae5\u978b\u53ef\u80fd\u4e0d\u660e\u767d\uff0c\u6709key\u4f5c\u4e3a\u9501\u4e0d\u5c31\u591f\u4e86\u5417\uff0c\u4e3a\u4ec0\u4e48\u8fd8\u8981\u7528\u5230value\uff1f\u539f\u56e0\u5c31\u662f\u6211\u4eec\u5728\u4e0a\u9762\u8bb2\u5230\u53ef\u9760\u6027\u65f6\uff0c\u5206\u5e03\u5f0f\u9501\u8981\u6ee1\u8db3\u7b2c\u56db\u4e2a\u6761\u4ef6\u89e3\u94c3\u8fd8\u987b\u7cfb\u94c3\u4eba\uff0c\u901a\u8fc7\u7ed9value\u8d4b\u503c\u4e3arequestId\uff0c\u6211\u4eec\u5c31\u77e5\u9053\u8fd9\u628a\u9501\u662f\u54ea\u4e2a\u8bf7\u6c42\u52a0\u7684\u4e86\uff0c\u5728\u89e3\u9501\u7684\u65f6\u5019\u5c31\u53ef\u4ee5\u6709\u4f9d\u636e\u3002requestId\u53ef\u4ee5\u4f7f\u7528UUID.randomUUID().toString()\u65b9\u6cd5\u751f\u6210\u3002<\/li>\n<li>\u7b2c\u4e09\u4e2a\u4e3anxxx\uff0c\u8fd9\u4e2a\u53c2\u6570\u6211\u4eec\u586b\u7684\u662fNX\uff0c\u610f\u601d\u662fSET IF NOT EXIST\uff0c\u5373\u5f53key\u4e0d\u5b58\u5728\u65f6\uff0c\u6211\u4eec\u8fdb\u884cset\u64cd\u4f5c\uff1b\u82e5key\u5df2\u7ecf\u5b58\u5728\uff0c\u5219\u4e0d\u505a\u4efb\u4f55\u64cd\u4f5c\uff1b<\/li>\n<li>\u7b2c\u56db\u4e2a\u4e3aexpx\uff0c\u8fd9\u4e2a\u53c2\u6570\u6211\u4eec\u4f20\u7684\u662fPX\uff0c\u610f\u601d\u662f\u6211\u4eec\u8981\u7ed9\u8fd9\u4e2akey\u52a0\u4e00\u4e2a\u8fc7\u671f\u7684\u8bbe\u7f6e\uff0c\u5177\u4f53\u65f6\u95f4\u7531\u7b2c\u4e94\u4e2a\u53c2\u6570\u51b3\u5b9a\u3002<\/li>\n<li>\u7b2c\u4e94\u4e2a\u4e3atime\uff0c\u4e0e\u7b2c\u56db\u4e2a\u53c2\u6570\u76f8\u547c\u5e94\uff0c\u4ee3\u8868key\u7684\u8fc7\u671f\u65f6\u95f4<\/li>\n<\/ul>\n<p>\u6267\u884c\u4e0a\u9762\u7684set()\u65b9\u6cd5\u5c31\u4f1a\u5bfc\u81f4\u4e24\u79cd\u7ed3\u679c\uff1a<br \/>\n1.\u5f53\u524d\u6ca1\u6709\u9501\uff08key\u4e0d\u5b58\u5728\uff09\uff0c\u90a3\u4e48\u5c31\u8fdb\u884c\u52a0\u9501\u64cd\u4f5c\uff0c\u5e76\u5bf9\u9501\u8bbe\u7f6e\u4e2a\u6709\u6548\u671f\uff0c\u540c\u65f6value\u8868\u793a\u52a0\u9501\u7684\u5ba2\u6237\u7aef<br \/>\n2.\u5df2\u6709\u9501\u5b58\u5728\uff0c\u4e0d\u505a\u4efb\u4f55\u64cd\u4f5c<\/p>\n<h5>3.2.2 \u4f7f\u7528jedis\u6dfb\u52a0\u9501\u7684\u9519\u8bef\u4f7f\u7528<\/h5>\n<h6>\u9519\u8bef\u793a\u4f8b1<\/h6>\n<p>\u6bd4\u8f83\u5e38\u89c1\u7684\u9519\u8bef\u793a\u4f8b\u5c31\u662f\u4f7f\u7528jedis.setnx()\u548cjedis.expire()\u7ec4\u5408\u5b9e\u73b0\u52a0\u9501\uff0c\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n<div>\n<pre>public static void wrongGetLock1(Jedis jedis, String lockKey, String requestId, int expireTime) {\n    Long result = jedis.setnx(lockKey, requestId);\n    if (result == 1) {\n        \/\/ \u82e5\u5728\u8fd9\u91cc\u7a0b\u5e8f\u7a81\u7136\u5d29\u6e83\uff0c\u5219\u65e0\u6cd5\u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4\uff0c\u5c06\u53d1\u751f\u6b7b\u9501\n        jedis.expire(lockKey, expireTime);\n    }\n}\n<\/pre>\n<\/div>\n<p>setnx()\u65b9\u6cd5\u4f5c\u7528\u5c31\u662fSET IF NOT EXIST\uff0cexpire()\u65b9\u6cd5\u5c31\u662f\u7ed9\u9501\u52a0\u4e00\u4e2a\u8fc7\u671f\u65f6\u95f4\u3002\u4e4d\u4e00\u770b\u597d\u50cf\u548c\u524d\u9762\u7684set()\u65b9\u6cd5\u7ed3\u679c\u4e00\u6837\uff0c\u7136\u800c\u7531\u4e8e\u8fd9\u662f\u4e24\u6761Redis\u547d\u4ee4\uff0c\u4e0d\u5177\u6709\u539f\u5b50\u6027\uff0c\u5982\u679c\u7a0b\u5e8f\u5728\u6267\u884c\u5b8csetnx()\u4e4b\u540e\u7a81\u7136\u5d29\u6e83\uff0c\u5bfc\u81f4\u9501\u6ca1\u6709\u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4\uff0c\u90a3\u4e48\u5c06\u4f1a\u53d1\u751f\u6b7b\u9501\u3002\u7f51\u4e0a\u4e4b\u6240\u4ee5\u6709\u4eba\u8fd9\u6837\u5b9e\u73b0\uff0c\u662f\u56e0\u4e3a\u4f4e\u7248\u672c\u7684jedis\u5e76\u4e0d\u652f\u6301\u591a\u53c2\u6570\u7684set()\u65b9\u6cd5\u3002<\/p>\n<h6>\u9519\u8bef\u793a\u4f8b2<\/h6>\n<p>\u8fd9\u4e00\u79cd\u9519\u8bef\u793a\u4f8b\u5c31\u6bd4\u8f83\u96be\u4ee5\u53d1\u73b0\u95ee\u9898\uff0c\u800c\u4e14\u5b9e\u73b0\u4e5f\u6bd4\u8f83\u590d\u6742\u3002<br \/>\n\u5b9e\u73b0\u601d\u8def\uff1a<br \/>\n\u4f7f\u7528jedis.setnx()\u547d\u4ee4\u5b9e\u73b0\u52a0\u9501\uff0c\u5176\u4e2dkey\u662f\u9501\uff0cvalue\u662f\u9501\u7684\u8fc7\u671f\u65f6\u95f4\u3002<br \/>\n\u6267\u884c\u8fc7\u7a0b\uff1a<\/p>\n<ol>\n<li>\u901a\u8fc7setnx()\u65b9\u6cd5\u5c1d\u8bd5\u52a0\u9501\uff0c\u5982\u679c\u5f53\u524d\u9501\u4e0d\u5b58\u5728\uff0c\u8fd4\u56de\u52a0\u9501\u6210\u529f\u3002<\/li>\n<li>\u5982\u679c\u9501\u5df2\u7ecf\u5b58\u5728\u5219\u83b7\u53d6\u9501\u7684\u8fc7\u671f\u65f6\u95f4\uff0c\u548c\u5f53\u524d\u65f6\u95f4\u6bd4\u8f83\uff0c\u5982\u679c\u9501\u5df2\u7ecf\u8fc7\u671f\uff0c\u5219\u8bbe\u7f6e\u65b0\u7684\u8fc7\u671f\u65f6\u95f4\uff0c\u8fd4\u56de\u52a0\u9501\u6210\u529f\u3002\u4ee3\u7801\u5982\u4e0b\uff1a<\/li>\n<\/ol>\n<div>\n<pre>public static boolean wrongGetLock2(Jedis jedis, String lockKey, int expireTime) {\n    long expires = System.currentTimeMillis() + expireTime;\n    String expiresStr = String.valueOf(expires);\n    \/\/ \u5982\u679c\u5f53\u524d\u9501\u4e0d\u5b58\u5728\uff0c\u8fd4\u56de\u52a0\u9501\u6210\u529f\n    if (jedis.setnx(lockKey, expiresStr) == 1) {\n        return true;\n    }\n    \/\/ \u5982\u679c\u9501\u5b58\u5728\uff0c\u83b7\u53d6\u9501\u7684\u8fc7\u671f\u65f6\u95f4\n    String currentValueStr = jedis.get(lockKey);\n    if (currentValueStr != null &amp;&amp; (Long.parseLong(currentValueStr) &lt; System.currentTimeMillis())) {\n        \/\/ \u9501\u5df2\u8fc7\u671f\uff0c\u83b7\u53d6\u4e0a\u4e00\u4e2a\u9501\u7684\u8fc7\u671f\u65f6\u95f4\uff0c\u5e76\u8bbe\u7f6e\u73b0\u5728\u9501\u7684\u8fc7\u671f\u65f6\u95f4\n        String oldValueStr = jedis.getSet(lockKey, expiresStr);\n        if (oldValueStr != null &amp;&amp; oldValueStr.equals(currentValueStr)) {\n            \/\/ \u8003\u8651\u591a\u7ebf\u7a0b\u5e76\u53d1\u7684\u60c5\u51b5\uff0c\u53ea\u6709\u4e00\u4e2a\u7ebf\u7a0b\u7684\u8bbe\u7f6e\u503c\u548c\u5f53\u524d\u503c\u76f8\u540c\uff0c\u5b83\u624d\u6709\u6743\u5229\u52a0\u9501\n            return true;\n        }\n    }\n    \/\/ \u5176\u4ed6\u60c5\u51b5\uff0c\u4e00\u5f8b\u8fd4\u56de\u52a0\u9501\u5931\u8d25\n    return false;\n}\n<\/pre>\n<\/div>\n<p>\u90a3\u4e48\u8fd9\u6bb5\u4ee3\u7801\u95ee\u9898\u5728\u54ea\u91cc\uff1f<\/p>\n<ol>\n<li>\u7531\u4e8e\u662f\u5ba2\u6237\u7aef\u81ea\u5df1\u751f\u6210\u8fc7\u671f\u65f6\u95f4\uff0c\u6240\u4ee5\u9700\u8981\u5f3a\u5236\u8981\u6c42\u5206\u5e03\u5f0f\u4e0b\u6bcf\u4e2a\u5ba2\u6237\u7aef\u7684\u65f6\u95f4\u5fc5\u987b\u540c\u6b65\u3002<\/li>\n<li>\u5f53\u9501\u8fc7\u671f\u7684\u65f6\u5019\uff0c\u5982\u679c\u591a\u4e2a\u5ba2\u6237\u7aef\u540c\u65f6\u6267\u884cjedis.getSet()\u65b9\u6cd5\uff0c\u90a3\u4e48\u867d\u7136\u6700\u7ec8\u53ea\u6709\u4e00\u4e2a\u5ba2\u6237\u7aef\u53ef\u4ee5\u52a0\u9501\uff0c\u4f46\u662f\u8fd9\u4e2a\u5ba2\u6237\u7aef\u7684\u9501\u7684\u8fc7\u671f\u65f6\u95f4\u53ef\u80fd\u88ab\u5176\u4ed6\u5ba2\u6237\u7aef\u8986\u76d6\u3002<\/li>\n<li>\u9501\u4e0d\u5177\u5907\u62e5\u6709\u8005\u6807\u8bc6\uff0c\u5373\u4efb\u4f55\u5ba2\u6237\u7aef\u90fd\u53ef\u4ee5\u89e3\u9501\u3002<\/li>\n<\/ol>\n<h5>\u6b63\u786e\u52a0\u9501\u4ee3\u7801<\/h5>\n<div>\n<pre>public class RedisTool {\n    private static final Long RELEASE_SUCCESS = 1L;\n    \/**\n     * \u91ca\u653e\u5206\u5e03\u5f0f\u9501\n     * @param jedis Redis\u5ba2\u6237\u7aef\n     * @param lockKey \u9501\n     * @param requestId \u8bf7\u6c42\u6807\u8bc6\n     * @return \u662f\u5426\u91ca\u653e\u6210\u529f\n     *\/\n    public static boolean releaseDistributedLock(Jedis jedis, String lockKey, String requestId) {\n        String script = \\\"if redis.call(\\'get\\', KEYS[1]) == ARGV[1] then return redis.call(\\'del\\', KEYS[1]) else return 0 end\\\";\n        Object result = jedis.eval(script, Collections.singletonList(lockKey), Collections.singletonList(requestId));\n       return RELEASE_SUCCESS.equals(result);\n    }\n}\n<\/pre>\n<\/div>\n<p>\u53ef\u4ee5\u770b\u5230\uff0c\u6211\u4eec\u89e3\u9501\u53ea\u9700\u8981\u4e24\u884c\u4ee3\u7801\u5c31\u641e\u5b9a\u4e86\uff01\u7b2c\u4e00\u884c\u4ee3\u7801\uff0c\u6211\u4eec\u5199\u4e86\u4e00\u4e2a\u7b80\u5355\u7684Lua\u811a\u672c\u4ee3\u7801\u3002\u7b2c\u4e8c\u884c\u4ee3\u7801\uff0c\u6211\u4eec\u5c06Lua\u4ee3\u7801\u4f20\u5230jedis.eval()\u65b9\u6cd5\u91cc\uff0c\u5e76\u4f7f\u53c2\u6570KEYS[1]\u8d4b\u503c\u4e3alockKey\uff0cARGV[1]\u8d4b\u503c\u4e3arequestId\u3002eval()\u65b9\u6cd5\u662f\u5c06Lua\u4ee3\u7801\u4ea4\u7ed9Redis\u670d\u52a1\u7aef\u6267\u884c\u3002<br \/>\n\u90a3\u4e48\u8fd9\u6bb5Lua\u4ee3\u7801\u7684\u529f\u80fd\u662f\u4ec0\u4e48\u5462\uff1f<br \/>\n\u5176\u5b9e\u5f88\u7b80\u5355\uff0c\u9996\u5148\u83b7\u53d6\u9501\u5bf9\u5e94\u7684value\u503c\uff0c\u68c0\u67e5\u662f\u5426\u4e0erequestId\u76f8\u7b49\uff0c\u5982\u679c\u76f8\u7b49\u5219\u5220\u9664\u9501\uff08\u89e3\u9501\uff09\u3002<br \/>\n\u90a3\u4e48\u4e3a\u4ec0\u4e48\u8981\u4f7f\u7528Lua\u8bed\u8a00\u6765\u5b9e\u73b0\u5462\uff1f<br \/>\n\u56e0\u4e3a\u8981\u786e\u4fdd\u4e0a\u8ff0\u64cd\u4f5c\u662f\u539f\u5b50\u6027\u7684\u3002\u5173\u4e8e\u975e\u539f\u5b50\u6027\u4f1a\u5e26\u6765\u4ec0\u4e48\u95ee\u9898\uff0c\u53ef\u4ee5\u9605\u8bfb<a href=\\\"https:\/\/links.jianshu.com\/go?to=https%3A%2F%2Fwudashan.cn%2F2017%2F10%2F23%2FRedis-Distributed-Lock-Implement%2F%23releaseLock-wrongDemo2\\\" target=\\\"_blank\\\" rel=\\\"noopener noreferrer\\\">\u3010\u89e3\u9501\u4ee3\u7801-\u9519\u8bef\u793a\u4f8b2\u3011<\/a>\u00a0\u3002\u90a3\u4e48\u4e3a\u4ec0\u4e48\u6267\u884ceval()\u65b9\u6cd5\u53ef\u4ee5\u786e\u4fdd\u539f\u5b50\u6027\uff0c\u6e90\u4e8eRedis\u7684\u7279\u6027\uff0c\u4e0b\u9762\u662f\u5b98\u7f51\u5bf9eval\u547d\u4ee4\u7684\u90e8\u5206\u89e3\u91ca\uff1a<br \/>\n\u7b80\u5355\u6765\u8bf4\uff0c\u5c31\u662f\u5728eval\u547d\u4ee4\u6267\u884cLua\u4ee3\u7801\u7684\u65f6\u5019\uff0cLua\u4ee3\u7801\u5c06\u88ab\u5f53\u6210\u4e00\u4e2a\u547d\u4ee4\u53bb\u6267\u884c\uff0c\u5e76\u4e14\u76f4\u5230eval\u547d\u4ee4\u6267\u884c\u5b8c\u6210\uff0cRedis\u624d\u4f1a\u6267\u884c\u5176\u4ed6\u547d\u4ee4\u3002<\/p>\n<h5>\u89e3\u9501\u9519\u8bef\u793a\u4f8b1<\/h5>\n<p>\u6700\u5e38\u89c1\u7684\u89e3\u9501\u4ee3\u7801\u5c31\u662f\u76f4\u63a5\u4f7f\u7528jedis.del()\u65b9\u6cd5\u5220\u9664\u9501\uff0c\u8fd9\u79cd\u4e0d\u5148\u5224\u65ad\u9501\u7684\u62e5\u6709\u8005\u800c\u76f4\u63a5\u89e3\u9501\u7684\u65b9\u5f0f\uff0c\u4f1a\u5bfc\u81f4\u4efb\u4f55\u5ba2\u6237\u7aef\u90fd\u53ef\u4ee5\u968f\u65f6\u8fdb\u884c\u89e3\u9501\uff0c\u5373\u4f7f\u8fd9\u628a\u9501\u4e0d\u662f\u5b83\u7684\u3002<\/p>\n<div>\n<pre>public static void wrongReleaseLock1(Jedis jedis, String lockKey) {\n    jedis.del(lockKey);\n}\n<\/pre>\n<\/div>\n<h5>\u89e3\u9501\u9519\u8bef\u793a\u4f8b2<\/h5>\n<p>\u8fd9\u79cd\u89e3\u9501\u4ee3\u7801\u4e4d\u4e00\u770b\u4e5f\u662f\u6ca1\u95ee\u9898\uff0c\u751a\u81f3\u6211\u4e4b\u524d\u4e5f\u5dee\u70b9\u8fd9\u6837\u5b9e\u73b0\uff0c\u4e0e\u6b63\u786e\u59ff\u52bf\u5dee\u4e0d\u591a\uff0c\u552f\u4e00\u533a\u522b\u7684\u662f\u5206\u6210\u4e24\u6761\u547d\u4ee4\u53bb\u6267\u884c\uff0c\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n<div>\n<pre>public static void wrongReleaseLock2(Jedis jedis, String lockKey, String requestId) {\n    \/\/ \u5224\u65ad\u52a0\u9501\u4e0e\u89e3\u9501\u662f\u4e0d\u662f\u540c\u4e00\u4e2a\u5ba2\u6237\u7aef\n    if (requestId.equals(jedis.get(lockKey))) {\n        \/\/ \u82e5\u5728\u6b64\u65f6\uff0c\u8fd9\u628a\u9501\u7a81\u7136\u4e0d\u662f\u8fd9\u4e2a\u5ba2\u6237\u7aef\u7684\uff0c\u5219\u4f1a\u8bef\u89e3\u9501\n        jedis.del(lockKey);\n    }\n}\n<\/pre>\n<\/div>\n<p>\u5982\u4ee3\u7801\u6ce8\u91ca\uff0c\u95ee\u9898\u5728\u4e8e\u5982\u679c\u8c03\u7528jedis.del()\u65b9\u6cd5\u7684\u65f6\u5019\uff0c\u8fd9\u628a\u9501\u5df2\u7ecf\u4e0d\u5c5e\u4e8e\u5f53\u524d\u5ba2\u6237\u7aef\u7684\u65f6\u5019\u4f1a\u89e3\u9664\u4ed6\u4eba\u52a0\u7684\u9501\u3002\u90a3\u4e48\u662f\u5426\u771f\u7684\u6709\u8fd9\u79cd\u573a\u666f\uff1f\u7b54\u6848\u662f\u80af\u5b9a\u7684\uff0c\u6bd4\u5982\u5ba2\u6237\u7aefA\u52a0\u9501\uff0c\u4e00\u6bb5\u65f6\u95f4\u4e4b\u540e\u5ba2\u6237\u7aefA\u89e3\u9501\uff0c\u5728\u6267\u884cjedis.del()\u4e4b\u524d\uff0c\u9501\u7a81\u7136\u8fc7\u671f\u4e86\uff0c\u6b64\u65f6\u5ba2\u6237\u7aefB\u5c1d\u8bd5\u52a0\u9501\u6210\u529f\uff0c\u7136\u540e\u5ba2\u6237\u7aefA\u518d\u6267\u884cdel()\u65b9\u6cd5\uff0c\u5219\u5c06\u5ba2\u6237\u7aefB\u7684\u9501\u7ed9\u89e3\u9664\u4e86\u3002<\/p>\n<h5>3.2.3 \u7f13\u5b58\u57fa\u4e8eRedisson\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\uff08\u63a8\u8350\uff09<\/h5>\n<p>Redission<br \/>\nRedission\u7684Wiki<\/p>\n<h5>3.2.4 \u57fa\u4e8e\u7f13\u5b58\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u5b58\u5728\u7684\u95ee\u9898<\/h5>\n<ol>\n<li>\u5355\u70b9\u95ee\u9898\uff1a\u5982\u679c\u5355\u673aredis\u6302\u6389\u4e86\uff0c\u90a3\u4e48\u7a0b\u5e8f\u4f1a\u8ddf\u7740\u51fa\u9519<\/li>\n<li>\u540c\u6b65\u95ee\u9898\uff1a\u5982\u679c\u8f6c\u79fb\u4f7f\u7528 slave\u8282\u70b9\uff0c\u590d\u5236\u4e0d\u662f\u540c\u6b65\u590d\u5236\uff0c\u4f1a\u51fa\u73b0\u591a\u4e2a\u7a0b\u5e8f\u83b7\u53d6\u9501\u7684\u60c5\u51b5<\/li>\n<\/ol>\n<h4>3.3\u3001\u57fa\u4e8eZookeeper\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501<\/h4>\n<h5>3.3.1 zookeeper\u7b80\u4ecb<\/h5>\n<p>zookeeper\uff08\u7b80\u79f0zk\uff09\uff1a\u662f\u4e00\u79cd\u63d0\u4f9b\u914d\u7f6e\u7ba1\u7406\u3001\u5206\u5e03\u5f0f\u534f\u540c\u4ee5\u53ca\u547d\u540d\u7684\u4e2d\u5fc3\u5316\u670d\u52a1<br \/>\n\u62bd\u8c61\u6a21\u578b\uff1a\u00a0zk\u63d0\u4f9b\u4e00\u4e2a\u591a\u5c42\u7ea7\u7684\u8282\u70b9\u547d\u540d\u7a7a\u95f4\uff08znode\uff09\uff0c\u6bcf\u4e2a\u8282\u70b9\u90fd\u7528\u4e00\u4e2a\u4ee5\u659c\u6760\uff08\/\uff09\u5206\u9694\u7684\u8def\u5f84\u8868\u793a\uff0c\u800c\u4e14\u6bcf\u4e2a\u8282\u70b9\u90fd\u6709\u7236\u8282\u70b9\uff08\u6839\u8282\u70b9\u9664\u5916\uff09\uff0c\u7c7b\u4f3c\u6587\u4ef6\u7cfb\u7edf\u3002\u4f8b\u5982\uff0c\/f1\/d2\u8fd9\u4e2a\u8868\u793a\u4e00\u4e2aznode\uff0c\u5b83\u7684\u7236\u8282\u70b9\u4e3a\/f1\uff0c\u7236\u7236\u8282\u70b9\u4e3a\/\uff0c\u800c\/\u4e3a\u6839\u8282\u70b9\u6ca1\u6709\u7236\u8282\u70b9\u3002\u8fd9\u4e9b\u8282\u70b9\u90fd\u53ef\u4ee5\u8bbe\u7f6e\u5173\u8054\u7684\u6570\u636e\uff0c\u4e3a\u4e86\u4fdd\u8bc1\u9ad8\u541e\u5410\u548c\u4f4e\u5ef6\u8fdf\uff0c\u5728\u5185\u5b58\u4e2d\u7ef4\u62a4\u4e86\u8fd9\u4e2a\u6811\u72b6\u7684\u76ee\u5f55\u7ed3\u6784\uff0c\u8fd9\u79cd\u7279\u6027\u4f7f\u5f97ZK\u4e0d\u80fd\u7528\u4e8e\u5b58\u653e\u5927\u91cf\u7684\u6570\u636e\uff0c\u6bcf\u4e2a\u8282\u70b9\u7684\u5b58\u653e\u6570\u636e\u4e0a\u9650\u4e3a1M<br \/>\n\u6709\u5e8f\u8282\u70b9\uff1azk\u5728\u751f\u6210\u5b50\u8282\u70b9\u65f6\u4f1a\u6839\u636e\u5f53\u524d\u5b50\u8282\u70b9\u7684\u6570\u91cf\u81ea\u52a8\u6dfb\u52a0\u6574\u6570\u5e8f\u53f7\uff0c\u4f8b\u5982\uff1a node-0000000000\u3001 node-0000000001**<br \/>\n\u4e34\u65f6\u8282\u70b9\uff1a\u5ba2\u6237\u7aef\u53ef\u4ee5\u5efa\u7acb\u4e00\u4e2a\u4e34\u65f6\u8282\u70b9\uff0c\u5728\u4f1a\u8bdd\u7ed3\u675f\u6216\u8005\u4f1a\u8bdd\u8d85\u65f6\u540e\uff0czk\u4f1a\u81ea\u52a8\u5220\u9664\u8be5\u8282\u70b9**<br \/>\n\u4e8b\u4ef6\u76d1\u542c\uff1a\u521b\u5efa\u8282\u70b9\u3001\u5220\u9664\u8282\u70b9\u3001\u8282\u70b9\u6570\u636e\u4fee\u6539\u3001\u8282\u70b9\u53d8\u66f4 **<\/p>\n<h5>3.3.2 \u5efa\u9501\u8fc7\u7a0b\uff1a<\/h5>\n<p>\u501f\u52a9zookeeper\u00a0\u4e34\u65f6\u6709\u5e8f\u8282\u70b9\u00a0\u6765\u5b9e\u73b0\u7684\u5206\u5e03\u5f0f\u9501\u7684\u8fc7\u7a0b\u5982\u4e0b\uff1a<br \/>\n\u5f53\u6bcf\u4e2a\u5ba2\u6237\u7aef\u5bf9\u67d0\u4e2a\u65b9\u6cd5\u52a0\u9501\u65f6\uff0c\u5728zookeeper\u4e0a\u4e0e\u8be5\u65b9\u6cd5\u5bf9\u5e94\u7684\u6307\u5b9a\u8282\u70b9\u7684\u76ee\u5f55\u4e0b\uff0c\u751f\u6210\u4e00\u4e2a\u552f\u4e00\u7684\u77ac\u65f6\u6709\u5e8f\u8282\u70b9\u3002<br \/>\n\u5224\u65ad\u662f\u5426\u83b7\u53d6\u9501\u7684\u65b9\u5f0f\u5f88\u7b80\u5355\uff0c\u53ea\u9700\u8981\u5224\u65ad\u6709\u5e8f\u8282\u70b9\u4e2d\u5e8f\u53f7\u6700\u5c0f\u7684\u4e00\u4e2a\u3002<br \/>\n\u5f53\u91ca\u653e\u9501\u7684\u65f6\u5019\uff0c\u53ea\u9700\u5c06\u8fd9\u4e2a\u77ac\u65f6\u8282\u70b9\u5220\u9664\u5373\u53ef\u3002\u540c\u65f6\uff0c\u5176\u53ef\u4ee5\u907f\u514d\u670d\u52a1\u5b95\u673a\u5bfc\u81f4\u7684\u9501\u65e0\u6cd5\u91ca\u653e\uff0c\u800c\u4ea7\u751f\u7684\u6b7b\u9501\u95ee\u9898\u3002<br \/>\n\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528zookeeper\u7b2c\u4e09\u65b9\u5e93Curator\u5ba2\u6237\u7aef\uff0c\u8fd9\u4e2a\u5ba2\u6237\u7aef\u4e2d\u5c01\u88c5\u4e86\u4e00\u4e2a\u53ef\u91cd\u5165\u7684\u9501\u670d\u52a1\u3002<\/p>\n<h5>3.3.3 \u4f18\u7f3a\u70b9\uff1a<\/h5>\n<p>\u4f18\u70b9\uff1a<br \/>\n\u81ea\u52a8\u91ca\u653e\u9501\uff1a\u5728\u521b\u5efa\u9501\u7684\u65f6\u5019\uff0c\u5ba2\u6237\u7aef\u4f1a\u5728ZK\u4e2d\u521b\u5efa\u4e00\u4e2a\u4e34\u65f6\u8282\u70b9\uff0c\u4e00\u65e6\u5ba2\u6237\u7aef\u83b7\u53d6\u5230\u9501\u4e4b\u540e\u7a81\u7136\u6302\u6389\uff08Session\u8fde\u63a5\u65ad\u5f00\uff09\uff0c\u90a3\u4e48\u8fd9\u4e2a\u4e34\u65f6\u8282\u70b9\u5c31\u4f1a\u81ea\u52a8\u5220\u9664\u6389<br \/>\n\u53ef\u963b\u585e\uff1a\u5ba2\u6237\u7aef\u53ef\u4ee5\u901a\u8fc7\u5728ZK\u4e2d\u521b\u5efa\u987a\u5e8f\u8282\u70b9\uff0c\u5e76\u4e14\u5728\u8282\u70b9\u4e0a\u7ed1\u5b9a\u76d1\u542c\u5668\uff0c\u4e00\u65e6\u8282\u70b9\u6709\u53d8\u5316\uff0cZK\u4f1a\u901a\u77e5\u5ba2\u6237\u7aef\uff0c\u5ba2\u6237\u7aef\u53ef\u4ee5\u68c0\u67e5\u81ea\u5df1\u521b\u5efa\u7684\u8282\u70b9\u662f\u4e0d\u662f\u5f53\u524d\u6240\u6709\u8282\u70b9\u4e2d\u5e8f\u53f7\u6700\u5c0f\u7684\uff0c\u5982\u679c\u662f\uff0c\u90a3\u4e48\u81ea\u5df1\u5c31\u83b7\u53d6\u5230\u9501\uff0c\u4fbf\u53ef\u4ee5\u6267\u884c\u4e1a\u52a1\u903b\u8f91\u4e86\u3002<br \/>\n\u53ef\u91cd\u5165\uff1a\u5ba2\u6237\u7aef\u5728\u521b\u5efa\u8282\u70b9\u7684\u65f6\u5019\uff0c\u628a\u5f53\u524d\u5ba2\u6237\u7aef\u7684\u4e3b\u673a\u4fe1\u606f\u548c\u7ebf\u7a0b\u4fe1\u606f\u76f4\u63a5\u5199\u5165\u5230\u8282\u70b9\u4e2d\uff0c\u4e0b\u6b21\u60f3\u8981\u83b7\u53d6\u9501\u7684\u65f6\u5019\u548c\u5f53\u524d\u6700\u5c0f\u7684\u8282\u70b9\u4e2d\u7684\u6570\u636e\u6bd4\u5bf9\u4e00\u4e0b\u5c31\u53ef\u4ee5\u4e86\u3002\u5982\u679c\u548c\u81ea\u5df1\u7684\u4fe1\u606f\u4e00\u6837\uff0c\u90a3\u4e48\u81ea\u5df1\u76f4\u63a5\u83b7\u53d6\u5230\u9501\uff0c\u5982\u679c\u4e0d\u4e00\u6837\u5c31\u518d\u521b\u5efa\u4e00\u4e2a\u4e34\u65f6\u7684\u987a\u5e8f\u8282\u70b9\uff0c\u53c2\u4e0e\u6392\u961f\u3002<br \/>\n\u9ad8\u53ef\u7528\uff1aZK\u662f\u96c6\u7fa4\u90e8\u7f72\u7684\uff0c\u53ea\u8981\u96c6\u7fa4\u4e2d\u6709\u534a\u6570\u4ee5\u4e0a\u7684\u673a\u5668\u5b58\u6d3b\uff0c\u5c31\u53ef\u4ee5\u5bf9\u5916\u63d0\u4f9b\u670d\u52a1\u3002<br \/>\n\u7f3a\u70b9 :<br \/>\n\u6027\u80fd\u4e0a\u4e0d\u5982\u4f7f\u7528\u7f13\u5b58\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u3002 \u9700\u8981\u5bf9ZK\u7684\u539f\u7406\u6709\u6240\u4e86\u89e3\u3002<\/p>\n<h3>\u56db\u3001\u4e09\u79cd\u65b9\u6848\u7684\u6bd4\u8f83\uff1a<\/h3>\n<p>\u4ece\u7406\u89e3\u7684\u96be\u6613\u7a0b\u5ea6\u89d2\u5ea6\uff08\u4ece\u4f4e\u5230\u9ad8\uff09:\u6570\u636e\u5e93 &gt; \u7f13\u5b58 &gt; Zookeeper<br \/>\n\u4ece\u5b9e\u73b0\u7684\u590d\u6742\u6027\u89d2\u5ea6\uff08\u4ece\u4f4e\u5230\u9ad8\uff09: Zookeeper &gt;= \u7f13\u5b58 &gt; \u6570\u636e\u5e93<br \/>\n\u4ece\u6027\u80fd\u89d2\u5ea6\uff08\u4ece\u9ad8\u5230\u4f4e\uff09: \u7f13\u5b58 &gt; Zookeeper &gt;= \u6570\u636e\u5e93<br \/>\n\u4ece\u53ef\u9760\u6027\u89d2\u5ea6\uff08\u4ece\u9ad8\u5230\u4f4e\uff09: Zookeeper &gt; \u7f13\u5b58 &gt; \u6570\u636e\u5e93<br \/>\n<\/article>\n","protected":false},"excerpt":{"rendered":"<p>\u4e00\u3001\u6982\u5ff5 \u5728\u5355\u673a\u73af\u5883\u4e2d\uff0cJava\u63d0\u4f9b\u4e86\u5f88\u591aAPI\u6765\u89e3\u51b3\u5e76\u53d1\u95ee\u9898\uff0c\u5982java.util.concurrent\u5305\u4e0b &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"http:\/\/www.weijing.co\/?p=1729\"> <span class=\"screen-reader-text\">\u5206\u5e03\u5f0f\u9501\u5b9e\u73b0\u65b9\u5f0f<\/span> \u67e5\u770b\u5168\u6587 &raquo;<\/a><\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"default","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":""},"categories":[90,88],"tags":[],"uagb_featured_image_src":{"full":false,"thumbnail":false,"medium":false,"medium_large":false,"large":false,"1536x1536":false,"2048x2048":false,"mailpoet_newsletter_max":false,"woocommerce_thumbnail":false,"woocommerce_single":false,"woocommerce_gallery_thumbnail":false,"shop_catalog":false,"shop_single":false,"shop_thumbnail":false},"uagb_author_info":{"display_name":"weijing","author_link":"http:\/\/www.weijing.co\/?author=4"},"uagb_comment_info":0,"uagb_excerpt":"\u4e00\u3001\u6982\u5ff5 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