{"id":59145,"date":"2026-01-13T12:40:51","date_gmt":"2026-01-13T04:40:51","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/59145.html"},"modified":"2026-01-13T12:40:51","modified_gmt":"2026-01-13T04:40:51","slug":"zookeeper%e5%85%a5%e9%97%a8%e5%ae%9e%e6%88%98%ef%bc%9a%e4%bb%8e%e9%9b%b6%e5%bc%80%e5%a7%8b%e6%8e%8c%e6%8f%a1%e5%88%86%e5%b8%83%e5%bc%8f%e5%8d%8f%e8%b0%83%e6%9c%8d%e5%8a%a1","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/59145.html","title":{"rendered":"ZooKeeper\u5165\u95e8\u5b9e\u6218\uff1a\u4ece\u96f6\u5f00\u59cb\u638c\u63e1\u5206\u5e03\u5f0f\u534f\u8c03\u670d\u52a1"},"content":{"rendered":"<h2>ZooKeeper\u5165\u95e8\u5b9e\u6218&#xff1a;\u4ece\u96f6\u5f00\u59cb\u638c\u63e1\u5206\u5e03\u5f0f\u534f\u8c03\u670d\u52a1<\/h2>\n<p>\u5728\u5206\u5e03\u5f0f\u7cfb\u7edf\u4e2d&#xff0c;\u5982\u4f55\u8ba9\u591a\u4e2a\u670d\u52a1\u8282\u70b9\u534f\u540c\u5de5\u4f5c&#xff1f;\u5982\u4f55\u5b9e\u73b0\u670d\u52a1\u6ce8\u518c\u4e0e\u53d1\u73b0&#xff1f;\u5982\u4f55\u4fdd\u8bc1\u914d\u7f6e\u7684\u4e00\u81f4\u6027&#xff1f;\u7b54\u6848\u90fd\u5728ZooKeeper\u8fd9\u4e2a\u5f3a\u5927\u7684\u5206\u5e03\u5f0f\u534f\u8c03\u670d\u52a1\u4e2d\u3002<\/p>\n<h3>\u4e00\u3001\u4ec0\u4e48\u662fZooKeeper&#xff1f;<\/h3>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/01\/20260113044042-6965cccaa0b59.png\" alt=\"\" \/><\/p>\n<p>ZooKeeper\u662f\u4e00\u4e2a\u5f00\u6e90\u7684\u5206\u5e03\u5f0f\u534f\u8c03\u670d\u52a1&#xff0c;\u7531Apache\u57fa\u91d1\u4f1a\u7ef4\u62a4\u3002\u5b83\u6700\u521d\u662f\u96c5\u864e\u516c\u53f8\u4e3a\u4e86\u89e3\u51b3\u5206\u5e03\u5f0f\u7cfb\u7edf\u4e2d\u7684\u534f\u8c03\u95ee\u9898\u800c\u5f00\u53d1\u7684&#xff0c;\u73b0\u5728\u5df2\u7ecf\u6210\u4e3aHadoop\u3001HBase\u3001Kafka\u7b49\u4f17\u591a\u5206\u5e03\u5f0f\u7cfb\u7edf\u7684\u57fa\u7840\u8bbe\u65bd\u3002<\/p>\n<h4>1.1 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decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/01\/20260113044043-6965cccb34ce0.png\" alt=\"\" \/><\/p>\n<p>ZooKeeper\u7684\u6570\u636e\u6a21\u578b\u7c7b\u4f3c\u4e8eUnix\u6587\u4ef6\u7cfb\u7edf&#xff0c;\u91c7\u7528\u5c42\u7ea7\u5316\u7684\u6811\u72b6\u7ed3\u6784\u3002\u6811\u4e2d\u7684\u8282\u70b9\u88ab\u79f0\u4e3a&#034;Znode&#034;\u3002<\/p>\n<h4>2.1 Znode\u7684\u7c7b\u578b<\/h4>\n<p>\u6839\u636e\u8282\u70b9\u7684\u751f\u547d\u5468\u671f\u548c\u7279\u6027&#xff0c;Znode\u53ef\u4ee5\u5206\u4e3a\u56db\u79cd\u7c7b\u578b&#xff1a;<\/p>\n<h5>1. \u6301\u4e45\u8282\u70b9&#xff08;PERSISTENT&#xff09;<\/h5>\n<ul>\n<li>\u8282\u70b9\u521b\u5efa\u540e\u4f1a\u4e00\u76f4\u5b58\u5728&#xff0c;\u76f4\u5230\u663e\u5f0f\u5220\u9664<\/li>\n<li>\u9002\u7528\u4e8e\u5b58\u50a8\u914d\u7f6e\u4fe1\u606f\u3001\u670d\u52a1\u5217\u8868\u7b49\u6570\u636e<\/li>\n<li>\u793a\u4f8b&#xff1a;\/config\/database<\/li>\n<\/ul>\n<h5>2. \u4e34\u65f6\u8282\u70b9&#xff08;EPHEMERAL&#xff09;<\/h5>\n<ul>\n<li>\u8282\u70b9\u7684\u751f\u547d\u5468\u671f\u4e0e\u5ba2\u6237\u7aef\u4f1a\u8bdd\u7ed1\u5b9a<\/li>\n<li>\u5ba2\u6237\u7aef\u4f1a\u8bdd\u7ed3\u675f\u540e&#xff0c;\u8282\u70b9\u81ea\u52a8\u5220\u9664<\/li>\n<li>\u9002\u7528\u4e8e\u670d\u52a1\u6ce8\u518c\u3001\u5fc3\u8df3\u68c0\u6d4b\u7b49\u573a\u666f<\/li>\n<li>\u793a\u4f8b&#xff1a;\/services\/provider-001<\/li>\n<\/ul>\n<h5>3. \u6301\u4e45\u987a\u5e8f\u8282\u70b9&#xff08;PERSISTENT_SEQUENTIAL&#xff09;<\/h5>\n<ul>\n<li>\u57fa\u672c\u7279\u6027\u4e0e\u6301\u4e45\u8282\u70b9\u76f8\u540c<\/li>\n<li>\u521b\u5efa\u65f6\u81ea\u52a8\u5728\u8282\u70b9\u540d\u540e\u8ffd\u52a010\u4f4d\u6570\u5b57\u5e8f\u53f7<\/li>\n<li>\u9002\u7528\u4e8e\u5206\u5e03\u5f0f\u961f\u5217\u3001\u5168\u5c40ID\u751f\u6210\u7b49\u573a\u666f<\/li>\n<li>\u793a\u4f8b&#xff1a;\/tasks\/seq-0000000001<\/li>\n<\/ul>\n<h5>4. \u4e34\u65f6\u987a\u5e8f\u8282\u70b9&#xff08;EPHEMERAL_SEQUENTIAL&#xff09;<\/h5>\n<ul>\n<li>\u57fa\u672c\u7279\u6027\u4e0e\u4e34\u65f6\u8282\u70b9\u76f8\u540c<\/li>\n<li>\u521b\u5efa\u65f6\u81ea\u52a8\u8ffd\u52a0\u5e8f\u53f7<\/li>\n<li>\u9002\u7528\u4e8e\u5206\u5e03\u5f0f\u9501\u3001Leader\u9009\u4e3e\u7b49\u573a\u666f<\/li>\n<li>\u793a\u4f8b&#xff1a;\/locks\/resource-0000000001<\/li>\n<\/ul>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/01\/20260113044043-6965cccb90f50.png\" alt=\"\" \/><\/p>\n<h4>2.2 Znode\u7684\u7ed3\u6784<\/h4>\n<p>\u6bcf\u4e2aZnode\u5305\u542b\u4ee5\u4e0b\u4fe1\u606f&#xff1a;<\/p>\n<p><span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">ZnodeData<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token class-name\">String<\/span> path<span class=\"token punctuation\">;<\/span>           <span class=\"token comment\">\/\/ \u8282\u70b9\u8def\u5f84<\/span><br \/>\n    <span class=\"token keyword\">byte<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> data<span class=\"token punctuation\">;<\/span>           <span class=\"token comment\">\/\/ \u8282\u70b9\u6570\u636e&#xff08;\u6700\u59271MB&#xff09;<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> version<span class=\"token punctuation\">;<\/span>           <span class=\"token comment\">\/\/ \u6570\u636e\u7248\u672c\u53f7<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> cversion<span class=\"token punctuation\">;<\/span>          <span class=\"token comment\">\/\/ \u5b50\u8282\u70b9\u7248\u672c\u53f7<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> aversion<span class=\"token punctuation\">;<\/span>          <span class=\"token comment\">\/\/ ACL\u7248\u672c\u53f7<\/span><br \/>\n    <span class=\"token keyword\">long<\/span> ephemeralOwner<span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/\/ \u4e34\u65f6\u8282\u70b9\u6240\u5c5e\u4f1a\u8bddID<\/span><br \/>\n    <span class=\"token keyword\">long<\/span> dataLength<span class=\"token punctuation\">;<\/span>       <span class=\"token comment\">\/\/ \u6570\u636e\u957f\u5ea6<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> numChildren<span class=\"token punctuation\">;<\/span>       <span class=\"token comment\">\/\/ \u5b50\u8282\u70b9\u6570\u91cf<\/span><br \/>\n    <span class=\"token keyword\">long<\/span> pzxid<span class=\"token punctuation\">;<\/span>            <span class=\"token comment\">\/\/ \u6700\u540e\u4fee\u6539\u5b50\u8282\u70b9\u7684\u4e8b\u52a1ID<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h3>\u4e09\u3001ZooKeeper\u7684\u57fa\u672c\u64cd\u4f5c<\/h3>\n<p>ZooKeeper\u63d0\u4f9b\u4e86\u4e30\u5bcc\u7684API\u6765\u8fdb\u884c\u8282\u70b9\u64cd\u4f5c&#xff0c;\u4e3b\u8981\u5305\u62ec\u4ee5\u4e0b\u51e0\u7c7b&#xff1a;<\/p>\n<h4>3.1 \u521b\u5efa\u8fde\u63a5<\/h4>\n<p>\u9996\u5148\u9700\u8981\u521b\u5efaZooKeeper\u5ba2\u6237\u7aef\u8fde\u63a5&#xff1a;<\/p>\n<p><span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">ZooKeeperConnection<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">final<\/span> <span class=\"token keyword\">int<\/span> SESSION_TIMEOUT <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">30000<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ 30\u79d2\u4f1a\u8bdd\u8d85\u65f6<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">final<\/span> <span class=\"token class-name\">String<\/span> CONNECTION_STRING <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;localhost:2181&#034;<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">private<\/span> <span class=\"token class-name\">ZooKeeper<\/span> zooKeeper<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token class-name\">CountDownLatch<\/span> connectedLatch <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">CountDownLatch<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">ZooKeeper<\/span> <span class=\"token function\">connectSync<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">throws<\/span> <span class=\"token class-name\">IOException<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">InterruptedException<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        zooKeeper <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">ZooKeeper<\/span><span class=\"token punctuation\">(<\/span>CONNECTION_STRING<span class=\"token punctuation\">,<\/span> SESSION_TIMEOUT<span class=\"token punctuation\">,<\/span> event <span class=\"token operator\">-&gt;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>event<span class=\"token punctuation\">.<\/span><span class=\"token function\">getState<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token class-name\">Event<span class=\"token punctuation\">.<\/span>KeeperState<span class=\"token punctuation\">.<\/span>SyncConnected<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                connectedLatch<span class=\"token punctuation\">.<\/span><span class=\"token function\">countDown<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        connectedLatch<span class=\"token punctuation\">.<\/span><span class=\"token function\">await<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">10<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">TimeUnit<\/span><span class=\"token punctuation\">.<\/span>SECONDS<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> zooKeeper<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u5173\u952e\u53c2\u6570\u8bf4\u660e&#xff1a;<\/p>\n<ul>\n<li>connectionString&#xff1a;\u670d\u52a1\u5668\u5730\u5740&#xff0c;\u683c\u5f0f\u4e3ahost:port&#xff0c;\u591a\u4e2a\u670d\u52a1\u5668\u7528\u9017\u53f7\u5206\u9694<\/li>\n<li>sessionTimeout&#xff1a;\u4f1a\u8bdd\u8d85\u65f6\u65f6\u95f4&#xff0c;\u5355\u4f4d\u6beb\u79d2<\/li>\n<li>watcher&#xff1a;\u76d1\u542c\u5668&#xff0c;\u7528\u4e8e\u63a5\u6536ZooKeeper\u7684\u4e8b\u4ef6\u901a\u77e5<\/li>\n<\/ul>\n<h4>3.2 \u521b\u5efa\u8282\u70b9<\/h4>\n<p><span class=\"token comment\">\/\/ \u521b\u5efa\u6301\u4e45\u8282\u70b9<\/span><br \/>\n<span class=\"token class-name\">String<\/span> path <span class=\"token operator\">&#061;<\/span> zooKeeper<span class=\"token punctuation\">.<\/span><span class=\"token function\">create<\/span><span class=\"token punctuation\">(<\/span><br \/>\n    <span class=\"token string\">&#034;\/config\/database&#034;<\/span><span class=\"token punctuation\">,<\/span>                    <span class=\"token comment\">\/\/ \u8282\u70b9\u8def\u5f84<\/span><br \/>\n    <span class=\"token string\">&#034;mysql:\/\/localhost:3306\/db&#034;<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">getBytes<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token comment\">\/\/ \u6570\u636e<\/span><br \/>\n    <span class=\"token class-name\">ZooDefs<span class=\"token punctuation\">.<\/span>Ids<\/span><span class=\"token punctuation\">.<\/span>OPEN_ACL_UNSAFE<span class=\"token punctuation\">,<\/span>          <span class=\"token comment\">\/\/ \u6743\u9650&#xff08;\u5f00\u653e&#xff09;<\/span><br \/>\n    <span class=\"token class-name\">CreateMode<\/span><span class=\"token punctuation\">.<\/span>PERSISTENT                 <span class=\"token comment\">\/\/ \u8282\u70b9\u7c7b\u578b<\/span><br \/>\n<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u521b\u5efa\u4e34\u65f6\u8282\u70b9<\/span><br \/>\n<span class=\"token class-name\">String<\/span> tempPath <span class=\"token operator\">&#061;<\/span> zooKeeper<span class=\"token punctuation\">.<\/span><span class=\"token function\">create<\/span><span class=\"token punctuation\">(<\/span><br \/>\n    <span class=\"token string\">&#034;\/services\/provider-001&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token string\">&#034;192.168.1.100:8080&#034;<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">getBytes<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token class-name\">ZooDefs<span class=\"token punctuation\">.<\/span>Ids<\/span><span class=\"token punctuation\">.<\/span>OPEN_ACL_UNSAFE<span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token class-name\">CreateMode<\/span><span class=\"token punctuation\">.<\/span>EPHEMERAL<br \/>\n<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u521b\u5efa\u987a\u5e8f\u8282\u70b9<\/span><br \/>\n<span class=\"token class-name\">String<\/span> seqPath <span class=\"token operator\">&#061;<\/span> zooKeeper<span class=\"token punctuation\">.<\/span><span class=\"token function\">create<\/span><span class=\"token punctuation\">(<\/span><br \/>\n    <span class=\"token string\">&#034;\/tasks\/task-&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token string\">&#034;task data&#034;<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">getBytes<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token class-name\">ZooDefs<span class=\"token punctuation\">.<\/span>Ids<\/span><span class=\"token punctuation\">.<\/span>OPEN_ACL_UNSAFE<span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token class-name\">CreateMode<\/span><span class=\"token punctuation\">.<\/span>PERSISTENT_SEQUENTIAL<br \/>\n<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token comment\">\/\/ \u8fd4\u56de\u8def\u5f84\u5982&#xff1a;\/tasks\/task-0000000001<\/span><\/p>\n<p>\u751f\u4ea7\u73af\u5883\u6700\u4f73\u5b9e\u8df5&#xff1a;<\/p>\n<li>\u521b\u5efa\u8282\u70b9\u524d\u5148\u68c0\u67e5\u7236\u8def\u5f84\u662f\u5426\u5b58\u5728<\/li>\n<li>\u5f02\u5e38\u5904\u7406\u8981\u5b8c\u5584&#xff0c;\u7279\u522b\u662fNodeExistsException<\/li>\n<li>\u987a\u5e8f\u8282\u70b9\u7684\u5e8f\u53f7\u662f\u5355\u8c03\u9012\u589e\u7684&#xff0c;\u53ef\u7528\u4e8e\u751f\u6210\u5168\u5c40\u552f\u4e00ID<\/li>\n<h4>3.3 \u8bfb\u53d6\u8282\u70b9\u6570\u636e<\/h4>\n<p><span class=\"token comment\">\/\/ \u8bfb\u53d6\u6570\u636e<\/span><br \/>\n<span class=\"token keyword\">byte<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> data <span class=\"token operator\">&#061;<\/span> zooKeeper<span class=\"token punctuation\">.<\/span><span class=\"token function\">getData<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\/config\/database&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token boolean\">false<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">null<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token class-name\">String<\/span> config <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">String<\/span><span class=\"token punctuation\">(<\/span>data<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u8bfb\u53d6\u6570\u636e\u5e76\u76d1\u542c\u53d8\u5316<\/span><br \/>\n<span class=\"token class-name\">Stat<\/span> stat <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">Stat<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">byte<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> data <span class=\"token operator\">&#061;<\/span> zooKeeper<span class=\"token punctuation\">.<\/span><span class=\"token function\">getData<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\/config\/database&#034;<\/span><span class=\"token punctuation\">,<\/span> watcher<span class=\"token punctuation\">,<\/span> stat<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u7248\u672c\u53f7&#xff1a;&#034;<\/span> <span class=\"token operator\">&#043;<\/span> stat<span class=\"token punctuation\">.<\/span><span class=\"token function\">getVersion<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u6570\u636e\u5927\u5c0f&#xff1a;&#034;<\/span> <span class=\"token operator\">&#043;<\/span> stat<span class=\"token punctuation\">.<\/span><span class=\"token function\">getDataLength<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u6570\u636e\u7248\u672c\u63a7\u5236&#xff1a;<\/p>\n<ul>\n<li>\u6bcf\u6b21\u6570\u636e\u66f4\u65b0\u90fd\u4f1a\u589e\u52a0\u7248\u672c\u53f7<\/li>\n<li>\u53ef\u4ee5\u4f7f\u7528CAS&#xff08;Compare-And-Swap&#xff09;\u673a\u5236\u8fdb\u884c\u4e50\u89c2\u9501\u66f4\u65b0<\/li>\n<li>Stat\u5bf9\u8c61\u5305\u542b\u8282\u70b9\u7684\u8be6\u7ec6\u5143\u4fe1\u606f<\/li>\n<\/ul>\n<h4>3.4 \u66f4\u65b0\u8282\u70b9\u6570\u636e<\/h4>\n<p><span class=\"token comment\">\/\/ \u83b7\u53d6\u5f53\u524d\u72b6\u6001<\/span><br \/>\n<span class=\"token class-name\">Stat<\/span> stat <span class=\"token operator\">&#061;<\/span> zooKeeper<span class=\"token punctuation\">.<\/span><span class=\"token function\">exists<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\/config\/database&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token boolean\">false<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u4f7f\u7528\u7248\u672c\u53f7\u66f4\u65b0&#xff08;\u4e50\u89c2\u9501&#xff09;<\/span><br \/>\n<span class=\"token class-name\">Stat<\/span> newStat <span class=\"token operator\">&#061;<\/span> zooKeeper<span class=\"token punctuation\">.<\/span><span class=\"token function\">setData<\/span><span class=\"token punctuation\">(<\/span><br \/>\n    <span class=\"token string\">&#034;\/config\/database&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token string\">&#034;mysql:\/\/prod-db:3306\/appdb&#034;<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">getBytes<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    stat<span class=\"token punctuation\">.<\/span><span class=\"token function\">getVersion<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>  <span class=\"token comment\">\/\/ \u6307\u5b9a\u7248\u672c\u53f7<\/span><br \/>\n<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u6ce8\u610f\u4e8b\u9879&#xff1a;<\/p>\n<li>\u7248\u672c\u53f7\u4e0d\u5339\u914d\u4f1a\u629b\u51faBadVersionException<\/li>\n<li>\u5982\u679c\u7248\u672c\u53f7\u4e3a-1&#xff0c;\u5219\u4e0d\u68c0\u67e5\u7248\u672c&#xff08;\u5f3a\u5236\u66f4\u65b0&#xff09;<\/li>\n<li>\u6570\u636e\u5927\u5c0f\u4e0d\u80fd\u8d85\u8fc71MB<\/li>\n<h4>3.5 \u5220\u9664\u8282\u70b9<\/h4>\n<p><span class=\"token comment\">\/\/ \u5220\u9664\u8282\u70b9&#xff08;\u9700\u8981\u6307\u5b9a\u7248\u672c\u53f7&#xff09;<\/span><br \/>\n<span class=\"token class-name\">Stat<\/span> stat <span class=\"token operator\">&#061;<\/span> zooKeeper<span class=\"token punctuation\">.<\/span><span class=\"token function\">exists<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\/config\/old&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token boolean\">false<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>stat <span class=\"token operator\">!&#061;<\/span> <span class=\"token keyword\">null<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    zooKeeper<span class=\"token punctuation\">.<\/span><span class=\"token function\">delete<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\/config\/old&#034;<\/span><span class=\"token punctuation\">,<\/span> stat<span class=\"token punctuation\">.<\/span><span class=\"token function\">getVersion<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u9012\u5f52\u5220\u9664\u8282\u70b9\u53ca\u5176\u5b50\u8282\u70b9<\/span><br \/>\n<span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">deleteRecursive<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span> path<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">throws<\/span> <span class=\"token class-name\">Exception<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token class-name\">List<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">String<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> children <span class=\"token operator\">&#061;<\/span> zooKeeper<span class=\"token punctuation\">.<\/span><span class=\"token function\">getChildren<\/span><span class=\"token punctuation\">(<\/span>path<span class=\"token punctuation\">,<\/span> <span class=\"token boolean\">false<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span> child <span class=\"token operator\">:<\/span> children<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">deleteRecursive<\/span><span class=\"token punctuation\">(<\/span>path <span class=\"token operator\">&#043;<\/span> <span class=\"token string\">&#034;\/&#034;<\/span> <span class=\"token operator\">&#043;<\/span> child<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    zooKeeper<span class=\"token punctuation\">.<\/span><span class=\"token function\">delete<\/span><span class=\"token punctuation\">(<\/span>path<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h4>3.6 \u83b7\u53d6\u5b50\u8282\u70b9\u5217\u8868<\/h4>\n<p><span class=\"token comment\">\/\/ \u83b7\u53d6\u5b50\u8282\u70b9\u5217\u8868<\/span><br \/>\n<span class=\"token class-name\">List<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">String<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> children <span class=\"token operator\">&#061;<\/span> zooKeeper<span class=\"token punctuation\">.<\/span><span class=\"token function\">getChildren<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\/services&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token boolean\">false<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u904d\u5386\u5b50\u8282\u70b9<\/span><br \/>\n<span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span> child <span class=\"token operator\">:<\/span> children<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token class-name\">String<\/span> childPath <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;\/services\/&#034;<\/span> <span class=\"token operator\">&#043;<\/span> child<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">byte<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> data <span class=\"token operator\">&#061;<\/span> zooKeeper<span class=\"token punctuation\">.<\/span><span class=\"token function\">getData<\/span><span class=\"token punctuation\">(<\/span>childPath<span class=\"token punctuation\">,<\/span> <span class=\"token boolean\">false<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">null<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span>child <span class=\"token operator\">&#043;<\/span> <span class=\"token string\">&#034; -&gt; &#034;<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">String<\/span><span class=\"token punctuation\">(<\/span>data<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h3>\u56db\u3001Watcher\u76d1\u542c\u673a\u5236<\/h3>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/01\/20260113044045-6965cccd3f3d1.png\" alt=\"\" \/><\/p>\n<p>Watcher\u662fZooKeeper\u7684\u6838\u5fc3\u7279\u6027\u4e4b\u4e00&#xff0c;\u5141\u8bb8\u5ba2\u6237\u7aef\u76d1\u542c\u8282\u70b9\u53d8\u5316\u5e76\u63a5\u6536\u5b9e\u65f6\u901a\u77e5\u3002<\/p>\n<h4>4.1 Watcher\u7684\u5de5\u4f5c\u539f\u7406<\/h4>\n<p>\u91cd\u8981\u7279\u6027&#xff1a;<\/p>\n<li>\u4e00\u6b21\u6027\u89e6\u53d1&#xff1a;Watcher\u89e6\u53d1\u540e\u81ea\u52a8\u5931\u6548&#xff0c;\u9700\u8981\u91cd\u65b0\u6ce8\u518c<\/li>\n<li>\u987a\u5e8f\u4fdd\u8bc1&#xff1a;\u5ba2\u6237\u7aef\u4f1a\u6309\u987a\u5e8f\u6536\u5230Watcher\u4e8b\u4ef6<\/li>\n<li>\u8f7b\u91cf\u7ea7&#xff1a;Watcher\u53ea\u901a\u77e5\u4e8b\u4ef6\u7c7b\u578b&#xff0c;\u4e0d\u4f20\u9012\u5177\u4f53\u6570\u636e<\/li>\n<h4>4.2 \u53ef\u76d1\u542c\u7684\u4e8b\u4ef6\u7c7b\u578b<\/h4>\n<p><span class=\"token keyword\">public<\/span> <span class=\"token keyword\">enum<\/span> <span class=\"token class-name\">EventType<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token class-name\">None<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span>              <span class=\"token comment\">\/\/ \u8fde\u63a5\u72b6\u6001\u53d8\u5316<\/span><br \/>\n    <span class=\"token class-name\">NodeCreated<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span>        <span class=\"token comment\">\/\/ \u8282\u70b9\u88ab\u521b\u5efa<\/span><br \/>\n    <span class=\"token class-name\">NodeDeleted<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span>        <span class=\"token comment\">\/\/ \u8282\u70b9\u88ab\u5220\u9664<\/span><br \/>\n    <span class=\"token class-name\">NodeDataChanged<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">3<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span>    <span class=\"token comment\">\/\/ \u8282\u70b9\u6570\u636e\u88ab\u4fee\u6539<\/span><br \/>\n    <span class=\"token class-name\">NodeChildrenChanged<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">4<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><span class=\"token comment\">\/\/ \u5b50\u8282\u70b9\u5217\u8868\u53d8\u5316<\/span><br \/>\n    <span class=\"token class-name\">DataWatchRemoved<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">5<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span>   <span class=\"token comment\">\/\/ Watcher\u88ab\u79fb\u9664<\/span><br \/>\n    <span class=\"token class-name\">ChildWatchRemoved<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">6<\/span><span class=\"token punctuation\">)<\/span>   <span class=\"token comment\">\/\/ \u5b50\u8282\u70b9Watcher\u88ab\u79fb\u9664<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h4>4.3 Watcher\u4f7f\u7528\u793a\u4f8b<\/h4>\n<p><span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">ConfigWatcher<\/span> <span class=\"token keyword\">implements<\/span> <span class=\"token class-name\">Watcher<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token class-name\">ZooKeeper<\/span> zooKeeper<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token annotation punctuation\">&#064;Override<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">process<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">WatchedEvent<\/span> event<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">switch<\/span> <span class=\"token punctuation\">(<\/span>event<span class=\"token punctuation\">.<\/span><span class=\"token function\">getType<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token keyword\">case<\/span> <span class=\"token class-name\">NodeDataChanged<\/span><span class=\"token operator\">:<\/span><br \/>\n                <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u914d\u7f6e\u6570\u636e\u5df2\u53d8\u66f4&#xff1a;&#034;<\/span> <span class=\"token operator\">&#043;<\/span> event<span class=\"token punctuation\">.<\/span><span class=\"token function\">getPath<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token comment\">\/\/ \u8bfb\u53d6\u65b0\u914d\u7f6e<\/span><br \/>\n                <span class=\"token keyword\">try<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                    <span class=\"token keyword\">byte<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> data <span class=\"token operator\">&#061;<\/span> zooKeeper<span class=\"token punctuation\">.<\/span><span class=\"token function\">getData<\/span><span class=\"token punctuation\">(<\/span>event<span class=\"token punctuation\">.<\/span><span class=\"token function\">getPath<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">null<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                    <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u65b0\u914d\u7f6e&#xff1a;&#034;<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">String<\/span><span class=\"token punctuation\">(<\/span>data<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">catch<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token class-name\">Exception<\/span> e<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                    e<span class=\"token punctuation\">.<\/span><span class=\"token function\">printStackTrace<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token punctuation\">}<\/span><br \/>\n                <span class=\"token keyword\">break<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>            <span class=\"token keyword\">case<\/span> <span class=\"token class-name\">NodeDeleted<\/span><span class=\"token operator\">:<\/span><br \/>\n                <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u914d\u7f6e\u8282\u70b9\u5df2\u5220\u9664&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token keyword\">break<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>            <span class=\"token keyword\">default<\/span><span class=\"token operator\">:<\/span><br \/>\n                <span class=\"token keyword\">break<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h4>4.4 Watcher\u7684\u6700\u4f73\u5b9e\u8df5<\/h4>\n<li>\u6301\u7eed\u76d1\u542c&#xff1a;\u5728Watcher\u56de\u8c03\u4e2d\u91cd\u65b0\u6ce8\u518cWatcher<\/li>\n<li>\u5f02\u5e38\u5904\u7406&#xff1a;\u5904\u7406ConnectionLoss\u3001SessionExpired\u7b49\u5f02\u5e38<\/li>\n<li>\u6027\u80fd\u4f18\u5316&#xff1a;\u907f\u514d\u8fc7\u5ea6\u4f7f\u7528Watcher&#xff0c;\u5408\u7406\u8bbe\u7f6e\u76d1\u542c\u7c92\u5ea6<\/li>\n<h3>\u4e94\u3001\u5b9e\u6218\u5e94\u7528<\/h3>\n<h4>5.1 \u670d\u52a1\u6ce8\u518c\u4e0e\u53d1\u73b0<\/h4>\n<p>\u573a\u666f\u63cf\u8ff0&#xff1a;<br \/>\n\u5fae\u670d\u52a1\u67b6\u6784\u4e2d&#xff0c;\u670d\u52a1\u63d0\u4f9b\u8005\u542f\u52a8\u65f6\u5c06\u81ea\u5df1\u7684\u5730\u5740\u6ce8\u518c\u5230ZooKeeper&#xff0c;\u670d\u52a1\u6d88\u8d39\u8005\u4eceZooKeeper\u83b7\u53d6\u670d\u52a1\u63d0\u4f9b\u8005\u5217\u8868\u3002<br \/>\n<img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/01\/20260113044047-6965cccf0ea23.png\" alt=\"\" \/><\/p>\n<p>\u5b9e\u73b0\u65b9\u6848&#xff1a;<\/p>\n<p><span class=\"token comment\">\/\/ \u670d\u52a1\u63d0\u4f9b\u8005\u6ce8\u518c<\/span><br \/>\n<span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">ServiceProvider<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token class-name\">ZooKeeper<\/span> zooKeeper<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token class-name\">String<\/span> servicePath <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;\/services\/user-service&#034;<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">register<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span> address<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">throws<\/span> <span class=\"token class-name\">Exception<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u521b\u5efa\u4e34\u65f6\u8282\u70b9&#xff0c;\u4f1a\u8bdd\u65ad\u5f00\u540e\u81ea\u52a8\u5220\u9664<\/span><br \/>\n        <span class=\"token class-name\">String<\/span> path <span class=\"token operator\">&#061;<\/span> zooKeeper<span class=\"token punctuation\">.<\/span><span class=\"token function\">create<\/span><span class=\"token punctuation\">(<\/span><br \/>\n            servicePath <span class=\"token operator\">&#043;<\/span> <span class=\"token string\">&#034;\/provider-&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n            address<span class=\"token punctuation\">.<\/span><span class=\"token function\">getBytes<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token class-name\">ZooDefs<span class=\"token punctuation\">.<\/span>Ids<\/span><span class=\"token punctuation\">.<\/span>OPEN_ACL_UNSAFE<span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token class-name\">CreateMode<\/span><span class=\"token punctuation\">.<\/span>EPHEMERAL_SEQUENTIAL<br \/>\n        <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u670d\u52a1\u6ce8\u518c\u6210\u529f&#xff1a;&#034;<\/span> <span class=\"token operator\">&#043;<\/span> path<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u670d\u52a1\u6d88\u8d39\u8005\u53d1\u73b0<\/span><br \/>\n<span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">ServiceConsumer<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token class-name\">ZooKeeper<\/span> zooKeeper<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">List<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">String<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> <span class=\"token function\">discover<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span> serviceName<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">throws<\/span> <span class=\"token class-name\">Exception<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token class-name\">String<\/span> path <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;\/services\/&#034;<\/span> <span class=\"token operator\">&#043;<\/span> serviceName<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token class-name\">List<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">String<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> providers <span class=\"token operator\">&#061;<\/span> zooKeeper<span class=\"token punctuation\">.<\/span><span class=\"token function\">getChildren<\/span><span class=\"token punctuation\">(<\/span>path<span class=\"token punctuation\">,<\/span> <span class=\"token boolean\">false<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token class-name\">List<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">String<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> addresses <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">ArrayList<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span> provider <span class=\"token operator\">:<\/span> providers<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token keyword\">byte<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> data <span class=\"token operator\">&#061;<\/span> zooKeeper<span class=\"token punctuation\">.<\/span><span class=\"token function\">getData<\/span><span class=\"token punctuation\">(<\/span>path <span class=\"token operator\">&#043;<\/span> <span class=\"token string\">&#034;\/&#034;<\/span> <span class=\"token operator\">&#043;<\/span> provider<span class=\"token punctuation\">,<\/span> <span class=\"token boolean\">false<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">null<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            addresses<span class=\"token punctuation\">.<\/span><span class=\"token function\">add<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">new<\/span> <span class=\"token class-name\">String<\/span><span class=\"token punctuation\">(<\/span>data<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><\/p>\n<p>        <span class=\"token keyword\">return<\/span> addresses<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u751f\u4ea7\u73af\u5883\u589e\u5f3a&#xff1a;<\/p>\n<li>\u6dfb\u52a0\u8d1f\u8f7d\u5747\u8861\u7b56\u7565&#xff08;\u968f\u673a\u3001\u8f6e\u8be2\u3001\u6700\u5c11\u8fde\u63a5\u7b49&#xff09;<\/li>\n<li>\u5b9e\u73b0\u5065\u5eb7\u68c0\u67e5\u673a\u5236<\/li>\n<li>\u652f\u6301\u591a\u7248\u672c\u670d\u52a1\u5171\u5b58<\/li>\n<h4>5.2 \u5206\u5e03\u5f0f\u914d\u7f6e\u4e2d\u5fc3<\/h4>\n<p>\u573a\u666f\u63cf\u8ff0&#xff1a;<br \/>\n\u591a\u4e2a\u5fae\u670d\u52a1\u5b9e\u4f8b\u9700\u8981\u5171\u4eab\u914d\u7f6e&#xff0c;\u914d\u7f6e\u53d8\u66f4\u540e\u9700\u8981\u5b9e\u65f6\u63a8\u9001\u5230\u6240\u6709\u5b9e\u4f8b\u3002<\/p>\n<p>\u5b9e\u73b0\u65b9\u6848&#xff1a;<\/p>\n<p><span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">ConfigCenter<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token class-name\">ZooKeeper<\/span> zooKeeper<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">volatile<\/span> <span class=\"token class-name\">ConfigData<\/span> currentConfig<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">init<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span> configPath<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">throws<\/span> <span class=\"token class-name\">Exception<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u76d1\u542c\u914d\u7f6e\u53d8\u5316<\/span><br \/>\n        <span class=\"token function\">watchConfig<\/span><span class=\"token punctuation\">(<\/span>configPath<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ \u52a0\u8f7d\u521d\u59cb\u914d\u7f6e<\/span><br \/>\n        <span class=\"token function\">loadConfig<\/span><span class=\"token punctuation\">(<\/span>configPath<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">watchConfig<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span> path<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">throws<\/span> <span class=\"token class-name\">Exception<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        zooKeeper<span class=\"token punctuation\">.<\/span><span class=\"token function\">exists<\/span><span class=\"token punctuation\">(<\/span>path<span class=\"token punctuation\">,<\/span> event <span class=\"token operator\">-&gt;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>event<span class=\"token punctuation\">.<\/span><span class=\"token function\">getType<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token class-name\">Event<span class=\"token punctuation\">.<\/span>EventType<span class=\"token punctuation\">.<\/span>NodeDataChanged<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                <span class=\"token keyword\">try<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                    <span class=\"token function\">loadConfig<\/span><span class=\"token punctuation\">(<\/span>path<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                    <span class=\"token function\">watchConfig<\/span><span class=\"token punctuation\">(<\/span>path<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u91cd\u65b0\u6ce8\u518cWatcher<\/span><br \/>\n                <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">catch<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token class-name\">Exception<\/span> e<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                    e<span class=\"token punctuation\">.<\/span><span class=\"token function\">printStackTrace<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token punctuation\">}<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">loadConfig<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span> path<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">throws<\/span> <span class=\"token class-name\">Exception<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">byte<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> data <span class=\"token operator\">&#061;<\/span> zooKeeper<span class=\"token punctuation\">.<\/span><span class=\"token function\">getData<\/span><span class=\"token punctuation\">(<\/span>path<span class=\"token punctuation\">,<\/span> <span class=\"token boolean\">false<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">null<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token class-name\">ConfigData<\/span> newConfig <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">parseConfig<\/span><span class=\"token punctuation\">(<\/span>data<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>currentConfig <span class=\"token operator\">&#061;<\/span> newConfig<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u914d\u7f6e\u5df2\u66f4\u65b0&#xff1a;&#034;<\/span> <span class=\"token operator\">&#043;<\/span> newConfig<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">ConfigData<\/span> <span class=\"token function\">getConfig<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> currentConfig<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u914d\u7f6e\u683c\u5f0f\u793a\u4f8b&#xff1a;<\/p>\n<p><span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token string-property property\">&#034;database&#034;<\/span><span class=\"token operator\">:<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token string-property property\">&#034;url&#034;<\/span><span class=\"token operator\">:<\/span> <span class=\"token string\">&#034;jdbc:mysql:\/\/localhost:3306\/appdb&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n        <span class=\"token string-property property\">&#034;username&#034;<\/span><span class=\"token operator\">:<\/span> <span class=\"token string\">&#034;admin&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n        <span class=\"token string-property property\">&#034;password&#034;<\/span><span class=\"token operator\">:<\/span> <span class=\"token string\">&#034;password&#034;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token string-property property\">&#034;redis&#034;<\/span><span class=\"token operator\">:<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token string-property property\">&#034;host&#034;<\/span><span class=\"token operator\">:<\/span> <span class=\"token string\">&#034;localhost&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n        <span class=\"token string-property property\">&#034;port&#034;<\/span><span class=\"token operator\">:<\/span> <span class=\"token number\">6379<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h4>5.3 \u5206\u5e03\u5f0f\u9501<\/h4>\n<p>\u573a\u666f\u63cf\u8ff0&#xff1a;<br \/>\n\u591a\u4e2a\u670d\u52a1\u5b9e\u4f8b\u540c\u65f6\u64cd\u4f5c\u540c\u4e00\u8d44\u6e90\u65f6&#xff0c;\u9700\u8981\u4f7f\u7528\u5206\u5e03\u5f0f\u9501\u4fdd\u8bc1\u4e92\u65a5\u8bbf\u95ee\u3002<\/p>\n<p>\u5b9e\u73b0\u65b9\u6848&#xff1a;<br \/>\n<img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/01\/20260113044048-6965ccd0e7474.png\" alt=\"\" \/><\/p>\n<p>\u4f7f\u7528\u4e34\u65f6\u987a\u5e8f\u8282\u70b9\u5b9e\u73b0\u516c\u5e73\u9501&#xff1a;<\/p>\n<p><span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">DistributedLock<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token class-name\">ZooKeeper<\/span> zooKeeper<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token class-name\">String<\/span> lockPath<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token class-name\">String<\/span> currentLock<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">boolean<\/span> <span class=\"token function\">lock<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">long<\/span> timeout<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">TimeUnit<\/span> unit<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">throws<\/span> <span class=\"token class-name\">Exception<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u521b\u5efa\u4e34\u65f6\u987a\u5e8f\u8282\u70b9<\/span><br \/>\n        currentLock <span class=\"token operator\">&#061;<\/span> zooKeeper<span class=\"token punctuation\">.<\/span><span class=\"token function\">create<\/span><span class=\"token punctuation\">(<\/span><br \/>\n            lockPath <span class=\"token operator\">&#043;<\/span> <span class=\"token string\">&#034;\/lock-&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token keyword\">null<\/span><span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token class-name\">ZooDefs<span class=\"token punctuation\">.<\/span>Ids<\/span><span class=\"token punctuation\">.<\/span>OPEN_ACL_UNSAFE<span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token class-name\">CreateMode<\/span><span class=\"token punctuation\">.<\/span>EPHEMERAL_SEQUENTIAL<br \/>\n        <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ \u68c0\u67e5\u662f\u5426\u662f\u6700\u5c0f\u7684\u8282\u70b9<\/span><br \/>\n        <span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token boolean\">true<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token class-name\">List<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">String<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> locks <span class=\"token operator\">&#061;<\/span> zooKeeper<span class=\"token punctuation\">.<\/span><span class=\"token function\">getChildren<\/span><span class=\"token punctuation\">(<\/span>lockPath<span class=\"token punctuation\">,<\/span> <span class=\"token boolean\">false<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token class-name\">Collections<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">sort<\/span><span class=\"token punctuation\">(<\/span>locks<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>            <span class=\"token class-name\">String<\/span> current <span class=\"token operator\">&#061;<\/span> currentLock<span class=\"token punctuation\">.<\/span><span class=\"token function\">substring<\/span><span class=\"token punctuation\">(<\/span>currentLock<span class=\"token punctuation\">.<\/span><span class=\"token function\">lastIndexOf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token char\">&#039;\/&#039;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">int<\/span> index <span class=\"token operator\">&#061;<\/span> locks<span class=\"token punctuation\">.<\/span><span class=\"token function\">indexOf<\/span><span class=\"token punctuation\">(<\/span>current<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>            <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>index <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">true<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u83b7\u5f97\u9501<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><\/p>\n<p>            <span class=\"token comment\">\/\/ \u76d1\u542c\u524d\u4e00\u4e2a\u8282\u70b9<\/span><br \/>\n            <span class=\"token class-name\">String<\/span> previousLock <span class=\"token operator\">&#061;<\/span> locks<span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span>index <span class=\"token operator\">&#8211;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">final<\/span> <span class=\"token class-name\">CountDownLatch<\/span> latch <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">CountDownLatch<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>            <span class=\"token class-name\">Stat<\/span> stat <span class=\"token operator\">&#061;<\/span> zooKeeper<span class=\"token punctuation\">.<\/span><span class=\"token function\">exists<\/span><span class=\"token punctuation\">(<\/span><br \/>\n                lockPath <span class=\"token operator\">&#043;<\/span> <span class=\"token string\">&#034;\/&#034;<\/span> <span class=\"token operator\">&#043;<\/span> previousLock<span class=\"token punctuation\">,<\/span><br \/>\n                event <span class=\"token operator\">-&gt;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>event<span class=\"token punctuation\">.<\/span><span class=\"token function\">getType<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token class-name\">Event<span class=\"token punctuation\">.<\/span>EventType<span class=\"token punctuation\">.<\/span>NodeDeleted<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                        latch<span class=\"token punctuation\">.<\/span><span class=\"token function\">countDown<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                    <span class=\"token punctuation\">}<\/span><br \/>\n                <span class=\"token punctuation\">}<\/span><br \/>\n            <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>            <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>stat <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token keyword\">null<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                <span class=\"token keyword\">continue<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u524d\u4e00\u4e2a\u8282\u70b9\u5df2\u4e0d\u5b58\u5728&#xff0c;\u91cd\u65b0\u68c0\u67e5<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><\/p>\n<p>            <span class=\"token comment\">\/\/ \u7b49\u5f85\u524d\u4e00\u4e2a\u8282\u70b9\u91ca\u653e<\/span><br \/>\n            latch<span class=\"token punctuation\">.<\/span><span class=\"token function\">await<\/span><span class=\"token punctuation\">(<\/span>timeout<span class=\"token punctuation\">,<\/span> unit<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">unlock<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">throws<\/span> <span class=\"token class-name\">Exception<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        zooKeeper<span class=\"token punctuation\">.<\/span><span class=\"token function\">delete<\/span><span class=\"token punctuation\">(<\/span>currentLock<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u4f7f\u7528\u793a\u4f8b&#xff1a;<\/p>\n<p><span class=\"token class-name\">DistributedLock<\/span> lock <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">DistributedLock<\/span><span class=\"token punctuation\">(<\/span>zk<span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;\/locks\/order-resource&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">try<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>lock<span class=\"token punctuation\">.<\/span><span class=\"token function\">lock<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">10<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">TimeUnit<\/span><span class=\"token punctuation\">.<\/span>SECONDS<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u6267\u884c\u4e1a\u52a1\u903b\u8f91<\/span><br \/>\n        <span class=\"token function\">processOrder<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">finally<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    lock<span class=\"token punctuation\">.<\/span><span class=\"token function\">unlock<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u9501\u7684\u5b9e\u73b0\u8981\u70b9&#xff1a;<\/p>\n<li>\u4f7f\u7528\u4e34\u65f6\u987a\u5e8f\u8282\u70b9\u907f\u514d\u7f8a\u7fa4\u6548\u5e94<\/li>\n<li>\u53ea\u76d1\u542c\u524d\u4e00\u4e2a\u8282\u70b9&#xff0c;\u800c\u975e\u6240\u6709\u8282\u70b9<\/li>\n<li>\u5ba2\u6237\u7aef\u5f02\u5e38\u65ad\u5f00\u65f6&#xff0c;\u9501\u4f1a\u81ea\u52a8\u91ca\u653e<\/li>\n<li>\u4f7f\u7528Curator\u6846\u67b6\u53ef\u4ee5\u7b80\u5316\u5b9e\u73b0<\/li>\n<h4>5.4 Leader\u9009\u4e3e<\/h4>\n<p>\u573a\u666f\u63cf\u8ff0&#xff1a;<br \/>\n\u5728\u96c6\u7fa4\u73af\u5883\u4e2d&#xff0c;\u9700\u8981\u4ece\u591a\u4e2a\u8282\u70b9\u4e2d\u9009\u51fa\u4e00\u4e2aLeader\u8282\u70b9\u8d1f\u8d23\u6267\u884c\u7279\u5b9a\u4efb\u52a1\u3002<br \/>\n<img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/01\/20260113044049-6965ccd193479.png\" alt=\"\" \/><\/p>\n<p>\u5b9e\u73b0\u65b9\u6848&#xff1a;<\/p>\n<p><span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">LeaderElection<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token class-name\">ZooKeeper<\/span> zooKeeper<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token class-name\">String<\/span> electionPath<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token class-name\">String<\/span> currentNode<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">elect<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">throws<\/span> <span class=\"token class-name\">Exception<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u521b\u5efa\u4e34\u65f6\u987a\u5e8f\u8282\u70b9<\/span><br \/>\n        currentNode <span class=\"token operator\">&#061;<\/span> zooKeeper<span class=\"token punctuation\">.<\/span><span class=\"token function\">create<\/span><span class=\"token punctuation\">(<\/span><br \/>\n            electionPath <span class=\"token operator\">&#043;<\/span> <span class=\"token string\">&#034;\/node_&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token keyword\">null<\/span><span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token class-name\">ZooDefs<span class=\"token punctuation\">.<\/span>Ids<\/span><span class=\"token punctuation\">.<\/span>OPEN_ACL_UNSAFE<span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token class-name\">CreateMode<\/span><span class=\"token punctuation\">.<\/span>EPHEMERAL_SEQUENTIAL<br \/>\n        <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ \u68c0\u67e5\u662f\u5426\u662fLeader<\/span><br \/>\n        <span class=\"token function\">checkLeader<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ \u76d1\u542c\u524d\u4e00\u4e2a\u8282\u70b9<\/span><br \/>\n        <span class=\"token function\">watchPreviousNode<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">checkLeader<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">throws<\/span> <span class=\"token class-name\">Exception<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token class-name\">List<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">String<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> nodes <span class=\"token operator\">&#061;<\/span> zooKeeper<span class=\"token punctuation\">.<\/span><span class=\"token function\">getChildren<\/span><span class=\"token punctuation\">(<\/span>electionPath<span class=\"token punctuation\">,<\/span> <span class=\"token boolean\">false<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token class-name\">Collections<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">sort<\/span><span class=\"token punctuation\">(<\/span>nodes<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token class-name\">String<\/span> current <span class=\"token operator\">&#061;<\/span> currentNode<span class=\"token punctuation\">.<\/span><span class=\"token function\">substring<\/span><span class=\"token punctuation\">(<\/span>currentNode<span class=\"token punctuation\">.<\/span><span class=\"token function\">lastIndexOf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token char\">&#039;\/&#039;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">int<\/span> index <span class=\"token operator\">&#061;<\/span> nodes<span class=\"token punctuation\">.<\/span><span class=\"token function\">indexOf<\/span><span class=\"token punctuation\">(<\/span>current<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>index <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token function\">onBecomeLeader<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">else<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token function\">onBecomeFollower<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">onBecomeLeader<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u6210\u4e3aLeader\u8282\u70b9&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u5f00\u59cb\u6267\u884cLeader\u4efb\u52a1<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">onBecomeFollower<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u6210\u4e3aFollower\u8282\u70b9&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u7b49\u5f85Leader\u53d8\u66f4<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h3>\u516d\u3001\u6700\u4f73\u5b9e\u8df5<\/h3>\n<h4>6.1 \u90e8\u7f72\u67b6\u6784<\/h4>\n<p>\u96c6\u7fa4\u89c4\u6a21&#xff1a;<\/p>\n<ul>\n<li>\u5f00\u53d1\u73af\u5883&#xff1a;3\u8282\u70b9&#xff08;\u5141\u8bb81\u4e2a\u8282\u70b9\u6545\u969c&#xff09;<\/li>\n<li>\u751f\u4ea7\u73af\u5883&#xff1a;5-7\u8282\u70b9&#xff08;\u5141\u8bb82-3\u4e2a\u8282\u70b9\u6545\u969c&#xff09;<\/li>\n<li>\u907f\u514d\u4f7f\u7528\u5076\u6570\u4e2a\u8282\u70b9<\/li>\n<\/ul>\n<p>\u670d\u52a1\u5668\u914d\u7f6e&#xff1a;<\/p>\n<ul>\n<li>CPU&#xff1a;4\u6838\u4ee5\u4e0a<\/li>\n<li>\u5185\u5b58&#xff1a;4GB\u4ee5\u4e0a<\/li>\n<li>\u78c1\u76d8&#xff1a;\u4f7f\u7528SSD&#xff0c;\u6570\u636e\u76ee\u5f55\u72ec\u7acb<\/li>\n<li>\u7f51\u7edc&#xff1a;\u4f4e\u5ef6\u8fdf\u3001\u9ad8\u5e26\u5bbd<\/li>\n<\/ul>\n<h4>6.2 \u914d\u7f6e\u4f18\u5316<\/h4>\n<p>zoo.cfg\u5173\u952e\u914d\u7f6e&#xff1a;<\/p>\n<p># \u57fa\u672c\u914d\u7f6e<br \/>\ntickTime&#061;2000                              # \u5fc3\u8df3\u65f6\u95f4\u95f4\u9694&#xff08;\u6beb\u79d2&#xff09;<br \/>\ninitLimit&#061;10                               # \u521d\u59cb\u540c\u6b65\u65f6\u9650&#xff08;tickTime\u500d\u6570&#xff09;<br \/>\nsyncLimit&#061;5                                # \u6570\u636e\u540c\u6b65\u65f6\u9650&#xff08;tickTime\u500d\u6570&#xff09;<br \/>\ndataDir&#061;\/var\/lib\/zookeeper                 # \u6570\u636e\u76ee\u5f55<br \/>\nclientPort&#061;2181                            # \u5ba2\u6237\u7aef\u8fde\u63a5\u7aef\u53e3<\/p>\n<p># \u96c6\u7fa4\u914d\u7f6e<br \/>\nserver.1&#061;zk1:2888:3888                     # \u8282\u70b91\u914d\u7f6e<br \/>\nserver.2&#061;zk2:2888:3888                     # \u8282\u70b92\u914d\u7f6e<br \/>\nserver.3&#061;zk3:2888:3888                     # \u8282\u70b93\u914d\u7f6e<\/p>\n<p># \u6027\u80fd\u4f18\u5316<br \/>\nmaxClientCnxns&#061;60                          # \u6700\u5927\u5ba2\u6237\u7aef\u8fde\u63a5\u6570<br \/>\nautopurge.snapRetainCount&#061;3                # \u4fdd\u7559\u5feb\u7167\u6570\u91cf<br \/>\nautopurge.purgeInterval&#061;1                  # \u6e05\u7406\u95f4\u9694&#xff08;\u5c0f\u65f6&#xff09;<br \/>\npreAllocSize&#061;64M                           # \u9884\u5206\u914d\u4e8b\u52a1\u65e5\u5fd7\u5927\u5c0f<\/p>\n<p># \u96c6\u7fa4\u914d\u7f6e&#xff08;3\u8282\u70b9\u96c6\u7fa4\u793a\u4f8b&#xff09;<br \/>\nserver.1&#061;192.168.1.101:2888:3888<br \/>\nserver.2&#061;192.168.1.102:2888:3888<br \/>\nserver.3&#061;192.168.1.103:2888:3888<\/p>\n<h4>6.3 \u5ba2\u6237\u7aef\u914d\u7f6e<\/h4>\n<p><span class=\"token comment\">\/\/ \u751f\u4ea7\u73af\u5883\u63a8\u8350\u7684\u5ba2\u6237\u7aef\u914d\u7f6e<\/span><br \/>\n<span class=\"token keyword\">public<\/span> <span class=\"token class-name\">ZooKeeper<\/span> <span class=\"token function\">createProductionClient<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">throws<\/span> <span class=\"token class-name\">IOException<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token comment\">\/\/ \u8fde\u63a5\u5b57\u7b26\u4e32&#xff1a;\u6240\u6709\u96c6\u7fa4\u8282\u70b9<\/span><br \/>\n    <span class=\"token class-name\">String<\/span> connectionString <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;zk1:2181,zk2:2181,zk3:2181&#034;<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u4f1a\u8bdd\u8d85\u65f6&#xff1a;\u6839\u636e\u4e1a\u52a1\u573a\u666f\u8bbe\u7f6e<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> sessionTimeout <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">30000<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ 30\u79d2<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u8fde\u63a5\u8d85\u65f6<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> connectionTimeout <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">10000<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ 10\u79d2<\/span><\/p>\n<p>    <span class=\"token class-name\">ZooKeeper<\/span> zk <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">ZooKeeper<\/span><span class=\"token punctuation\">(<\/span><br \/>\n        connectionString<span class=\"token punctuation\">,<\/span><br \/>\n        sessionTimeout<span class=\"token punctuation\">,<\/span><br \/>\n        event <span class=\"token operator\">-&gt;<\/span> <span class=\"token function\">handleEvent<\/span><span class=\"token punctuation\">(<\/span>event<span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">return<\/span> zk<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h3>\u4e03\u3001\u603b\u7ed3<\/h3>\n<p>ZooKeeper\u4f5c\u4e3a\u5206\u5e03\u5f0f\u534f\u8c03\u670d\u52a1&#xff0c;\u5728\u5fae\u670d\u52a1\u3001\u5927\u6570\u636e\u3001\u5206\u5e03\u5f0f\u7cfb\u7edf\u4e2d\u626e\u6f14\u7740\u91cd\u8981\u89d2\u8272\u3002\u4e3b\u8981\u529f\u80fd\u70b9&#xff1a;<\/p>\n<li>\u6838\u5fc3\u6982\u5ff5&#xff1a;\u6570\u636e\u6a21\u578b\u3001\u8282\u70b9\u7c7b\u578b\u3001Watcher\u673a\u5236<\/li>\n<li>\u57fa\u672c\u64cd\u4f5c&#xff1a;\u589e\u5220\u6539\u67e5\u3001\u6743\u9650\u63a7\u5236<\/li>\n<li>\u5b9e\u6218\u5e94\u7528&#xff1a;\u670d\u52a1\u53d1\u73b0\u3001\u914d\u7f6e\u4e2d\u5fc3\u3001\u5206\u5e03\u5f0f\u9501\u3001Leader\u9009\u4e3e<\/li>\n","protected":false},"excerpt":{"rendered":"<p>\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb80\u6b21\u3002ZooKeeper\u4f5c\u4e3a\u5206\u5e03\u5f0f\u534f\u8c03\u670d\u52a1\uff0c\u901a\u8fc7\u6811\u72b6\u8282\u70b9\u7ed3\u6784(Znode)\u5b9e\u73b0\u6570\u636e\u5b58\u50a8\u4e0e\u534f\u8c03\u529f\u80fd\u3002\u672c\u6587\u4ecb\u7ecd\u4e86ZooKeeper\u7684\u6838\u5fc3\u7279\u6027\u3001\u6570\u636e\u6a21\u578b\u548c\u57fa\u672c\u64cd\u4f5c\uff0c\u5305\u62ec\u56db\u79cd\u8282\u70b9\u7c7b\u578b\uff08\u6301\u4e45\/\u4e34\u65f6\/\u987a\u5e8f\u8282\u70b9\uff09\u53ca\u5176\u9002\u7528\u573a\u666f\u3002\u8be6\u7ec6\u8bb2\u89e3\u4e86\u521b\u5efa\u8fde\u63a5\u3001\u589e\u5220\u6539\u67e5\u8282\u70b9\u7b49API\u4f7f\u7528\u65b9\u6cd5\uff0c\u5e76\u5f3a\u8c03Watcher\u76d1\u542c\u673a\u5236\u5728\u5b9e\u65f6\u6570\u636e\u53d8\u66f4\u901a\u77e5\u4e2d\u7684\u91cd\u8981\u6027\u3002ZooKeeper\u89e3\u51b3\u4e86\u5206\u5e03\u5f0f\u7cfb\u7edf\u4e2d\u7684\u670d\u52a1\u6ce8\u518c\u3001\u914d\u7f6e\u7ba1\u7406\u3001\u5206\u5e03\u5f0f\u9501\u7b49\u5173\u952e\u95ee\u9898\uff0c\u662f\u6784\u5efa\u53ef\u9760\u5206\u5e03\u5f0f\u7cfb\u7edf\u7684\u57fa\u7840\u7ec4\u4ef6\u3002<\/p>\n","protected":false},"author":2,"featured_media":59138,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"topic":[],"class_list":["post-59145","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server"],"yoast_head":"<!-- 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content=\"\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb80\u6b21\u3002ZooKeeper\u4f5c\u4e3a\u5206\u5e03\u5f0f\u534f\u8c03\u670d\u52a1\uff0c\u901a\u8fc7\u6811\u72b6\u8282\u70b9\u7ed3\u6784(Znode)\u5b9e\u73b0\u6570\u636e\u5b58\u50a8\u4e0e\u534f\u8c03\u529f\u80fd\u3002\u672c\u6587\u4ecb\u7ecd\u4e86ZooKeeper\u7684\u6838\u5fc3\u7279\u6027\u3001\u6570\u636e\u6a21\u578b\u548c\u57fa\u672c\u64cd\u4f5c\uff0c\u5305\u62ec\u56db\u79cd\u8282\u70b9\u7c7b\u578b\uff08\u6301\u4e45\/\u4e34\u65f6\/\u987a\u5e8f\u8282\u70b9\uff09\u53ca\u5176\u9002\u7528\u573a\u666f\u3002\u8be6\u7ec6\u8bb2\u89e3\u4e86\u521b\u5efa\u8fde\u63a5\u3001\u589e\u5220\u6539\u67e5\u8282\u70b9\u7b49API\u4f7f\u7528\u65b9\u6cd5\uff0c\u5e76\u5f3a\u8c03Watcher\u76d1\u542c\u673a\u5236\u5728\u5b9e\u65f6\u6570\u636e\u53d8\u66f4\u901a\u77e5\u4e2d\u7684\u91cd\u8981\u6027\u3002ZooKeeper\u89e3\u51b3\u4e86\u5206\u5e03\u5f0f\u7cfb\u7edf\u4e2d\u7684\u670d\u52a1\u6ce8\u518c\u3001\u914d\u7f6e\u7ba1\u7406\u3001\u5206\u5e03\u5f0f\u9501\u7b49\u5173\u952e\u95ee\u9898\uff0c\u662f\u6784\u5efa\u53ef\u9760\u5206\u5e03\u5f0f\u7cfb\u7edf\u7684\u57fa\u7840\u7ec4\u4ef6\u3002\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.wsisp.com\/helps\/59145.html\" \/>\n<meta property=\"og:site_name\" content=\"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"article:published_time\" content=\"2026-01-13T04:40:51+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/01\/20260113044042-6965cccaa0b59.png\" \/>\n<meta name=\"author\" content=\"admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"6 \u5206\" \/>\n<script type=\"application\/ld+json\" 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