{"id":381,"date":"2024-10-16T21:16:53","date_gmt":"2024-10-16T13:16:53","guid":{"rendered":"https:\/\/www.zackzzp.top\/?p=381"},"modified":"2024-10-21T16:14:28","modified_gmt":"2024-10-21T08:14:28","slug":"%e4%b8%80%e6%96%87%e4%ba%86%e8%a7%a3%e5%88%86%e5%b8%83%e5%bc%8f%e9%94%81","status":"publish","type":"post","link":"http:\/\/www.zackzzp.top\/index.php\/2024\/10\/16\/%e4%b8%80%e6%96%87%e4%ba%86%e8%a7%a3%e5%88%86%e5%b8%83%e5%bc%8f%e9%94%81\/","title":{"rendered":"\u4e00\u6587\u4e86\u89e3\u5206\u5e03\u5f0f\u9501"},"content":{"rendered":"<h2>\u6982\u8ff0<\/h2>\n<h3>\u5206\u5e03\u5f0f\u9501\u7684CAP\u7406\u8bba<\/h3>\n<p>\u5728\u4e00\u4e2a\u5206\u5e03\u5f0f\u7cfb\u7edf\uff0c\u6700\u591a\u53ea\u80fd\u6ee1\u8db3\u4e00\u4e0b\u4e09\u9879\u4e2d\u7684\u4e24\u9879<\/p>\n<ul>\n<li>\u4e00\u81f4\u6027\uff08Consistency\uff09\uff1a\u5728\u5206\u5e03\u5f0f\u7cfb\u7edf\u4e2d\u7684\u6240\u6709\u6570\u636e\u5907\u4efd\uff0c\u5728\u540c\u4e00\u65f6\u523b\u662f\u5426\u540c\u6837\u7684\u503c\uff08\u7b49\u540c\u4e8e\u6240\u6709\u8282\u70b9\u8bbf\u95ee\u540c\u4e00\u4efd\u6700\u65b0\u7684\u6570\u636e\u526f\u672c\uff09<\/li>\n<li>\u53ef\u7528\u6027\uff08Availability\uff09\uff1a\u4fdd\u8bc1\u6bcf\u4e2a\u8bf7\u6c42\u4e0d\u7ba1\u6210\u529f\u6216\u8005\u5931\u8d25\u90fd\u6709\u54cd\u5e94<\/li>\n<li>\u5206\u533a\u5bb9\u9519\u6027\uff08Partition tolerance\uff09\uff1a\u7cfb\u7edf\u4e2d\u4efb\u610f\u4fe1\u606f\u7684\u4e22\u5931\u6216\u5931\u8d25\u4e0d\u4f1a\u5f71\u54cd\u7cfb\u7edf\u7684\u7ee7\u7eed\u8fd0\u4f5c<\/li>\n<\/ul>\n<h3>\u5206\u5e03\u5f0f\u9501\u7684\u4ea7\u751f<\/h3>\n<p>\u5f53\u5728\u5206\u5e03\u5f0f\u6a21\u578b\u4e0b\uff0c\u6570\u636e\u53ea\u6709\u4e00\u4efd\uff08\u6216\u6709\u9650\u5236\uff09\uff0c\u6b64\u65f6\u9700\u8981\u5229\u7528\u9501\u6280\u672f\u6765\u63a7\u5236\u67d0\u4e00\u65f6\u523b\u4fee\u6539\u6570\u636e\u7684\u8fdb\u7a0b\u6570\u3002\u8fd9\u79cd\u9501\u5373\u4e3a\u5206\u5e03\u5f0f\u9501\u3002<\/p>\n<p>\u4e3a\u4e86\u4fdd\u8bc1\u4e00\u4e2a\u65b9\u6cd5\u6216\u5c5e\u6027\u5728\u9ad8\u5e76\u53d1\u60c5\u51b5\u4e0b\u7684\u540c\u4e00\u65f6\u95f4\u53ea\u80fd\u88ab\u540c\u4e00\u4e2a\u7ebf\u7a0b\u6267\u884c\uff0c\u5728\u4f20\u7edf\u5355\u4f53\u5e94\u7528\u5355\u673a\u90e8\u7f72\u7684\u60c5\u51b5\u4e0b\uff0c\u53ef\u4ee5\u4f7f\u7528\u5e76\u53d1\u5904\u7406\u76f8\u5173\u7684\u529f\u80fd\u8fdb\u884c\u4e92\u65a5\u63a7\u5236\u3002\u4f46\u662f\uff0c\u968f\u7740\u4e1a\u52a1\u53d1\u5c55\u7684\u9700\u8981\uff0c\u539f\u5355\u4f53\u5355\u673a\u90e8\u7f72\u7684\u7cfb\u7edf\u88ab\u6f14\u5316\u6210\u5206\u5e03\u5f0f\u96c6\u7fa4\u7cfb\u7edf\u540e\uff0c\u7531\u4e8e\u5206\u5e03\u5f0f\u7cfb\u7edf\u591a\u7ebf\u7a0b\u3001\u591a\u8fdb\u7a0b\u5e76\u4e14\u5206\u5e03\u5728\u4e0d\u540c\u673a\u5668\u4e0a\uff0c\u8fd9\u5c06\u4f7f\u539f\u5355\u673a\u90e8\u7f72\u60c5\u51b5\u4e0b\u7684\u5e76\u53d1\u63a7\u5236\u9501\u7b56\u7565\u5931\u6548\uff0c\u5355\u7eaf\u7684\u5e94\u7528\u5e76\u4e0d\u80fd\u63d0\u4f9b\u5206\u5e03\u5f0f\u9501\u7684\u80fd\u529b\u3002\u4e3a\u4e86\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\u5c31\u9700\u8981\u4e00\u79cd\u8de8\u673a\u5668\u7684\u4e92\u65a5\u673a\u5236\u6765\u63a7\u5236\u5171\u4eab\u8d44\u6e90\u7684\u8bbf\u95ee\uff0c\u8fd9\u5c31\u662f\u5206\u5e03\u5f0f\u9501\u8981\u89e3\u51b3\u7684\u95ee\u9898\uff01<\/p>\n<\/p>\n<h3>\u5206\u5e03\u5f0f\u9501\u5e94\u8be5\u5177\u5907\u7684\u6761\u4ef6<\/h3>\n<ul>\n<li>\u4e92\u65a5\u6027\uff1a\u5728\u5206\u5e03\u5f0f\u7cfb\u7edf\u73af\u5883\u4e0b\uff0c\u4e00\u4e2a\u65b9\u6cd5\u5728\u540c\u4e00\u65f6\u95f4\u53ea\u80fd\u88ab\u4e00\u4e2a\u673a\u5668\u7684\u4e00\u4e2a\u7ebf\u7a0b\u6267\u884c\uff1b<\/li>\n<li>\u9ad8\u53ef\u7528\u7684\u83b7\u53d6\u9501\u4e0e\u91ca\u653e\u9501\uff1b<\/li>\n<li>\u9ad8\u6027\u80fd\u7684\u83b7\u53d6\u9501\u4e0e\u91ca\u653e\u9501\uff1b<\/li>\n<li>\u53ef\u91cd\u5165\u6027\uff1a\u5177\u5907\u53ef\u91cd\u5165\u7279\u6027\uff0c\u5177\u5907\u9501\u5931\u6548\u673a\u5236\uff0c\u9632\u6b62\u6b7b\u9501\uff0c\u5373\u5c31\u7b97\u4e00\u4e2a\u5ba2\u6237\u7aef\u6301\u6709\u9501\u7684\u671f\u95f4\u5d29\u6e83\u800c\u6ca1<\/li>\n<li>\u6709\u4e3b\u52a8\u91ca\u653e\u9501\uff0c\u4e5f\u9700\u8981\u4fdd\u8bc1\u540e\u7eed\u5176\u4ed6\u5ba2\u6237\u7aef\u80fd\u591f\u52a0\u9501\u6210\u529f<\/li>\n<li>\u975e\u963b\u585e\uff1a\u5177\u5907\u975e\u963b\u585e\u9501\u7279\u6027\uff0c\u5373\u6ca1\u6709\u83b7\u53d6\u5230\u9501\u5c06\u76f4\u63a5\u8fd4\u56de\u83b7\u53d6\u9501\u5931\u8d25<\/li>\n<\/ul>\n<h3>\u5206\u5e03\u5f0f\u9501\u7684\u5e94\u7528\u573a\u666f<\/h3>\n<ul>\n<li>\u5546\u54c1\u79d2\u6740<\/li>\n<li>\u62a2\u4f18\u60e0\u5238<\/li>\n<\/ul>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n<h2>\u5b9e\u73b0\u65b9\u5f0f<\/h2>\n<\/p>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/img.picgo.net\/2024\/10\/16\/imagefc0e0784963f1606.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/img.picgo.net\/2024\/10\/16\/imagefc0e0784963f1606.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"image\" border=\"0\" \/><\/div><\/p>\n<h3>\u57fa\u4e8e\u6570\u636e\u5e93<\/h3>\n<h4>\u60b2\u89c2\u9501<\/h4>\n<p>\u521b\u5efa\u8d44\u6e90\u9501\u8868<\/p>\n<pre class=\"code\"> CREATE TABLE `resource_lock` (<br \/>`id` int(4) NOT NULL AUTO_INCREMENT COMMENT '\u4e3b\u952e',<br \/>`resource_name` varchar(64) NOT NULL DEFAULT '' COMMENT '\u9501\u5b9a\u7684\u8d44\u6e90\u540d',<br \/>`owner` varchar(64) NOT NULL DEFAULT '' COMMENT '\u9501\u62e5\u6709\u8005',<br \/>`desc` varchar(1024) NOT NULL DEFAULT '\u5907\u6ce8\u4fe1\u606f',<br \/>`update_time` timestamp NOT NULL DEFAULT '' COMMENT '\u4fdd\u5b58\u6570\u636e\u65f6\u95f4\uff0c\u81ea\u52a8\u751f\u6210',<br \/>PRIMARY KEY (`id`),<br \/>UNIQUE KEY `uidx_resource_name` (`resource_name `) USING BTREE<br \/>) ENGINE=InnoDB DEFAULT CHARSET=utf8 COMMENT='\u9501\u5b9a\u4e2d\u7684\u8d44\u6e90';<\/pre>\n<p>resource_name\u5fc5\u987b\u6709\u552f\u4e00\u7d22\u5f15<\/p>\n<\/p>\n<p>\u4f7f\u7528\u4e8b\u52a1\u67e5\u8be2\u66f4\u65b0<\/p>\n<pre class=\"code\"> @Transaction<br \/>public void lock(String name) {<br \/>ResourceLock rlock = exeSql(\"select * from resource_lock where resource_name = name for update\");<br \/>if (rlock == null) {<br \/>exeSql(\"insert into resource_lock(reosurce_name,owner,count) values (name, 'ip',0)\");<br \/>}<br \/>}<\/pre>\n<p>\u4f7f\u7528 for update \u9501\u5b9a\u7684\u8d44\u6e90\u3002\u5982\u679c\u6267\u884c\u6210\u529f\uff0c\u4f1a\u7acb\u5373\u8fd4\u56de\uff0c\u6267\u884c\u63d2\u5165\u6570\u636e\u5e93\uff0c\u540e\u7eed\u518d\u6267\u884c\u4e00\u4e9b\u5176\u4ed6\u4e1a\u52a1\u903b\u8f91\uff0c\u76f4\u5230\u4e8b\u52a1\u63d0\u4ea4\uff0c\u6267\u884c\u7ed3\u675f\uff1b\u5982\u679c\u6267\u884c\u5931\u8d25\uff0c\u5c31\u4f1a\u4e00\u76f4\u963b\u585e\u7740\u3002<\/p>\n<p>\u53ef\u4ee5\u5728\u6570\u636e\u5e93\u5ba2\u6237\u7aef\u5de5\u5177\u4e0a\u6d4b\u8bd5\u51fa\u6765\u8fd9\u4e2a\u6548\u679c\uff0c\u5f53\u5728\u4e00\u4e2a\u7ec8\u7aef\u6267\u884c\u4e86 for update\uff0c\u4e0d\u63d0\u4ea4\u4e8b\u52a1\u3002\u5728\u53e6\u5916\u7684\u7ec8\u7aef\u4e0a\u6267\u884c\u76f8\u540c\u6761\u4ef6\u7684 for update\uff0c\u4f1a\u4e00\u76f4\u5361\u7740<\/p>\n<p>\u867d\u7136\u4e5f\u80fd\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u7684\u6548\u679c\uff0c\u4f46\u662f\u4f1a\u5b58\u5728\u6027\u80fd\u74f6\u9888\u3002<\/p>\n<p>\u4f18\u70b9\uff1a<\/p>\n<p>\u7b80\u5355\u6613\u7528\uff0c\u597d\u7406\u89e3\uff0c\u4fdd\u969c\u6570\u636e\u5f3a\u4e00\u81f4\u6027\u3002<\/p>\n<p>\u7f3a\u70b9\uff1a<\/p>\n<p>1\uff09\u5728 RR \u4e8b\u52a1\u7ea7\u522b\uff0cselect \u7684 for update \u64cd\u4f5c\u662f\u57fa\u4e8e\u95f4\u9699\u9501\uff08gap lock\uff09 \u5b9e\u73b0\u7684\uff0c\u662f\u4e00\u79cd\u60b2\u89c2\u9501\u7684\u5b9e\u73b0\u65b9\u5f0f\uff0c\u6240\u4ee5\u5b58\u5728<strong>\u963b\u585e\u95ee\u9898<\/strong>\u3002<\/p>\n<p>2\uff09\u9ad8\u5e76\u53d1\u60c5\u51b5\u4e0b\uff0c\u5927\u91cf\u8bf7\u6c42\u8fdb\u6765\uff0c\u4f1a\u5bfc\u81f4\u5927\u90e8\u5206\u8bf7\u6c42\u8fdb\u884c\u6392\u961f\uff0c\u5f71\u54cd\u6570\u636e\u5e93\u7a33\u5b9a\u6027\uff0c\u4e5f\u4f1a<strong>\u8017\u8d39\u670d\u52a1\u7684CPU\u7b49\u8d44\u6e90<\/strong>\u3002<\/p>\n<p>\u5f53\u83b7\u5f97\u9501\u7684\u5ba2\u6237\u7aef\u7b49\u5f85\u65f6\u95f4\u8fc7\u957f\u65f6\uff0c\u4f1a\u63d0\u793a\uff1a<\/p>\n<pre class=\"code\">[40001][1205] Lock wait timeout exceeded; try restarting transaction<br \/>1<\/pre>\n<p>\u9ad8\u5e76\u53d1\u60c5\u51b5\u4e0b\uff0c\u4e5f\u4f1a\u9020\u6210\u5360\u7528\u8fc7\u591a\u7684\u5e94\u7528\u7ebf\u7a0b\uff0c\u5bfc\u81f4\u4e1a\u52a1\u65e0\u6cd5\u6b63\u5e38\u54cd\u5e94\u3002<\/p>\n<\/p>\n<p>3\uff09\u5982\u679c\u4f18\u5148\u83b7\u5f97\u9501\u7684\u7ebf\u7a0b\u56e0\u4e3a\u67d0\u4e9b\u539f\u56e0\uff0c\u4e00\u76f4\u6ca1\u6709\u91ca\u653e\u6389\u9501\uff0c\u53ef\u80fd\u4f1a\u5bfc\u81f4<strong>\u6b7b\u9501<\/strong>\u7684\u53d1\u751f\u3002<\/p>\n<p>4\uff09\u9501\u7684\u957f\u65f6\u95f4\u4e0d\u91ca\u653e\uff0c\u4f1a\u4e00\u76f4\u5360\u7528\u6570\u636e\u5e93\u8fde\u63a5\uff0c\u53ef\u80fd\u4f1a\u5c06<strong>\u6570\u636e\u5e93\u8fde\u63a5\u6c60\u6491\u7206<\/strong>\uff0c\u5f71\u54cd\u5176\u4ed6\u670d\u52a1\u3002<\/p>\n<p>5\uff09MySql\u6570\u636e\u5e93\u4f1a\u505a\u67e5\u8be2\u4f18\u5316\uff0c\u5373\u4fbf\u4f7f\u7528\u4e86\u7d22\u5f15\uff0c\u4f18\u5316\u65f6\u53d1\u73b0\u5168\u8868\u626b\u6548\u7387\u66f4\u9ad8\uff0c\u5219\u53ef\u80fd\u4f1a<strong>\u5c06\u884c\u9501\u5347\u7ea7\u4e3a\u8868\u9501\uff0c\u6b64\u65f6\u53ef\u80fd\u5c31\u66f4\u60b2\u5267\u4e86\u3002<\/strong><\/p>\n<p>6\uff09<strong>\u4e0d\u652f\u6301\u53ef\u91cd\u5165\u7279\u6027<\/strong>\uff0c\u5e76\u4e14\u8d85\u65f6\u7b49\u5f85\u65f6\u95f4\u662f\u5168\u5c40\u7684\uff0c\u4e0d\u80fd\u968f\u4fbf\u6539\u52a8\u3002<\/p>\n<\/p>\n<h4>\u4e50\u89c2\u9501<\/h4>\n<p>\u57fa\u4e8eCAS\uff0c\u6dfb\u52a0\u65f6\u95f4\u6233\u6216\u7248\u672c\u53f7<\/p>\n<p>update xx set version=new_version where xx=yy and version=Old_version\uff0c\u901a\u8fc7\u589e\u52a0\u9012\u589e\u7684\u7248\u672c\u53f7\u5b57\u6bb5\u5b9e\u73b0\u4e50\u89c2\u9501\u3002<\/p>\n<p>\u4e0d\u5177\u6709\u4e92\u65a5\u6027\uff0c\u4e0d\u4f1a\u4ea7\u751f\u9501\u7b49\u5f85\u800c\u6d88\u8017\u8d44\u6e90\uff0c\u64cd\u4f5c\u8fc7\u7a0b\u4e2d\u8ba4\u4e3a\u4e0d\u5b58\u5728\u5e76\u53d1\u51b2\u7a81\uff0c\u53ea\u6709update version\u5931\u8d25\u540e\u624d\u80fd\u89c9\u5bdf\u5230\u3002<\/p>\n<p>\u62a2\u8d2d\u3001\u79d2\u6740\u5c31\u662f\u7528\u4e86\u8fd9\u79cd\u5b9e\u73b0\u4ee5\u9632\u6b62\u8d85\u5356\u3002<\/p>\n<p>\u521b\u5efa\u8d44\u6e90\u9501\u8868<\/p>\n<pre class=\"code\">CREATE TABLE `resource` (<br \/>`id` int(4) NOT NULL AUTO_INCREMENT COMMENT '\u4e3b\u952e',<br \/>`resource_name` varchar(64) NOT NULL DEFAULT '' COMMENT '\u8d44\u6e90\u540d',<br \/>`share` varchar(64) NOT NULL DEFAULT '' COMMENT '\u72b6\u6001',<br \/>`version` int(4) NOT NULL DEFAULT '' COMMENT '\u7248\u672c\u53f7',<br \/>`desc` varchar(1024) NOT NULL DEFAULT '\u5907\u6ce8\u4fe1\u606f',<br \/>`update_time` timestamp NOT NULL DEFAULT '' COMMENT '\u4fdd\u5b58\u6570\u636e\u65f6\u95f4\uff0c\u81ea\u52a8\u751f\u6210',<br \/>PRIMARY KEY (`id`),<br \/>UNIQUE KEY `uidx_resource_name` (`resource_name `) USING BTREE<br \/>) ENGINE=InnoDB DEFAULT CHARSET=utf8 COMMENT='\u8d44\u6e90';<\/pre>\n<\/p>\n<p>\u6dfb\u52a0\u65f6\u95f4\u6233\u4f2a\u4ee3\u7801\u5b9e\u73b0<\/p>\n<pre class=\"code\">\u00a0Resrouce resource = exeSql(\"select * from resource where resource_name = xxx\");\nboolean succ = exeSql(\"update resource set version= 'newVersion' ... where resource_name = xxx and version = 'oldVersion'\");\n\nif (!succ) {\n    \/\/ \u53d1\u8d77\u91cd\u8bd5\n}<\/pre>\n<p>\u4f18\u70b9\uff1a<\/p>\n<ul>\n<li>\u5b9e\u73b0\u7b80\u5355\uff0c\u590d\u6742\u5ea6\u4f4e<\/li>\n<li>\u4fdd\u969c\u6570\u636e\u4e00\u81f4\u6027<\/li>\n<\/ul>\n<p>\u7f3a\u70b9\uff1a<\/p>\n<ul>\n<li>\u6027\u80fd\u4f4e\uff0c\u5e76\u4e14\u6709\u9501\u8868\u7684\u98ce\u9669<\/li>\n<li>\u53ef\u9760\u6027\u5dee<\/li>\n<li>\u975e\u963b\u585e\u64cd\u4f5c\u5931\u8d25\u540e\uff0c\u9700\u8981\u8f6e\u8be2\uff0c\u5360\u7528CPU\u8d44\u6e90<\/li>\n<li>\u957f\u65f6\u95f4\u4e0dcommit\u6216\u8005\u662f\u957f\u65f6\u95f4\u8f6e\u8be2\uff0c\u53ef\u80fd\u4f1a\u5360\u7528\u8f83\u591a\u7684\u8fde\u63a5\u8d44\u6e90<\/li>\n<\/ul>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n<h3>\u57fa\u4e8eZookeeper\u5b9e\u73b0<\/h3>\n<h4>\u5b9e\u73b0\u601d\u60f3<\/h4>\n<ol>\n<li>\u521b\u5efa\u4e00\u4e2a\u76ee\u5f55mylock<\/li>\n<li>\u7ebf\u7a0bA\u83b7\u53d6\u9501\u5c31\u5728mylock\u91cc\u521b\u5efa\u4e00\u4e2a\u987a\u5e8f\u4e34\u65f6\u8282\u70b9<\/li>\n<li>\u67e5\u770b\u6240\u6709\u5b50\u8282\u70b9\uff0c\u67e5\u770b\u662f\u5426\u6709\u6bd4\u81ea\u5df1\u5c0f\u7684\u5144\u5f1f\u8282\u70b9\uff0c\u5982\u679c\u6ca1\u6709\uff0c\u5c31\u8bc1\u660e\u81ea\u5df1\u662f\u6700\u5c0f\u7684\u7ebf\u7a0b\uff0c<br \/>\u53ef\u4ee5\u83b7\u53d6\u9501<\/li>\n<li>\u7ebf\u7a0bB\u83b7\u53d6\u6240\u6709\u5b50\u8282\u70b9\uff0c\u5224\u65ad\u81ea\u5df1\u662f\u4e0d\u662f\u6700\u5c0f\u7684\uff0c\u76d1\u542c\u6bd4\u81ea\u5df1\u6b21\u5c0f\u7684\u5b50\u8282\u70b9<\/li>\n<li>\u7ebf\u7a0bA\u5904\u7406\u5b8c\uff0cB\u76d1\u542c\u5230A\u7ed3\u675f\uff0c\u5224\u65ad\u81ea\u5df1\u662f\u4e0d\u662f\u6700\u5c0f\u7684\uff0c\u662f\u83b7\u53d6\u9501<\/li>\n<\/ol>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/img.picgo.net\/2024\/10\/16\/image6cbae2614f3e0732.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/img.picgo.net\/2024\/10\/16\/image6cbae2614f3e0732.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"image\" border=\"0\" \/><\/div><\/p>\n<p>\u5b9e\u73b0\u4f7f\u7528\u76f4\u63a5\u4f7f\u7528Apache\u7684\u5f00\u6e90\u5e93Curator\uff0c\u5b83\u662f\u4e00\u4e2aZooKeeper\u5ba2\u6237\u7aef\uff0cCurator\u63d0\u4f9b\u7684InterProcessMutex\u662f\u5206\u5e03\u5f0f\u9501\u7684\u5b9e\u73b0\uff0cacquire\u65b9\u6cd5\u7528\u4e8e\u83b7\u53d6\u9501\uff0crelease\u65b9\u6cd5\u7528\u4e8e\u91ca\u653e\u9501\u3002<\/p>\n<pre class=\"code\"> InterProcessMutex interProcessMutex = new InterProcessMutex(client,\"\/anyLock\"); <br \/>interProcessMutex.acquire(); <br \/>interProcessMutex.release(); <\/pre>\n<p>\u5206\u5e03\u5f0f\u9501\u6838\u5fc3\u6e90\u7801<\/p>\n<pre class=\"code\"> private boolean internalLockLoop(long startMillis, Long millisToWait, String ourPath) throws Exception <br \/>{ <br \/>boolean haveTheLock = false; <br \/>boolean doDelete = false; <br \/>try { <br \/>if ( revocable.get() != null ) { <br \/>client.getData().usingWatcher(revocableWatcher).forPath(ourPath); <br \/>} <br \/><br \/>while ( (client.getState() == CuratorFrameworkState.STARTED) &amp;&amp; !haveTheLock ) { <br \/>\/\/ \u83b7\u53d6\u5f53\u524d\u6240\u6709\u8282\u70b9\u6392\u5e8f\u540e\u7684\u96c6\u5408 <br \/>List&lt;String&gt; children = getSortedChildren(); <br \/>\/\/ \u83b7\u53d6\u5f53\u524d\u8282\u70b9\u7684\u540d\u79f0 <br \/>String sequenceNodeName = ourPath.substring(basePath.length() + 1); \/\/ +1 to include the slash <br \/>\/\/ \u5224\u65ad\u5f53\u524d\u8282\u70b9\u662f\u5426\u662f\u6700\u5c0f\u7684\u8282\u70b9 <br \/>PredicateResults predicateResults = driver.getsTheLock(client, children, sequenceNodeName, maxLeases); <br \/>if ( predicateResults.getsTheLock() ) { <br \/>\/\/ \u83b7\u53d6\u5230\u9501 <br \/>haveTheLock = true; <br \/>} else { <br \/>\/\/ \u6ca1\u83b7\u53d6\u5230\u9501\uff0c\u5bf9\u5f53\u524d\u8282\u70b9\u7684\u4e0a\u4e00\u4e2a\u8282\u70b9\u6ce8\u518c\u4e00\u4e2a\u76d1\u542c\u5668 <br \/>String previousSequencePath = basePath + \"\/\" + predicateResults.getPathToWatch(); <br \/>synchronized(this){ <br \/>Stat stat = client.checkExists().usingWatcher(watcher).forPath(previousSequencePath); <br \/>if ( stat != null ){ <br \/>if ( millisToWait != null ){ <br \/>millisToWait -= (System.currentTimeMillis() - startMillis); <br \/>startMillis = System.currentTimeMillis(); <br \/>if ( millisToWait &lt;= 0 ){ <br \/>doDelete = true; \/\/ timed out - delete our node <br \/>break; <br \/>} <br \/>wait(millisToWait); <br \/>}else{ <br \/>wait(); <br \/>} <br \/>} <br \/>} <br \/>\/\/ else it may have been deleted (i.e. lock released). Try to acquire again <br \/>} <br \/>} <br \/>} <br \/>catch ( Exception e ) { <br \/>doDelete = true; <br \/>throw e; <br \/>} finally{ <br \/>if ( doDelete ){ <br \/>deleteOurPath(ourPath); <br \/>} <br \/>} <br \/>return haveTheLock; <br \/>} <\/pre>\n<p>Curator\u5b9e\u73b0\u539f\u7406<\/p>\n<\/p>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/img.picgo.net\/2024\/10\/16\/imagecc3d097d288381a2.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/img.picgo.net\/2024\/10\/16\/imagecc3d097d288381a2.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"image\" border=\"0\" \/><\/div><\/p>\n<p>\u4f18\u70b9\uff1a<\/p>\n<ul>\n<li>\u53ef\u9760\u6027\u975e\u5e38\u9ad8<\/li>\n<li>\u6027\u80fd\u8f83\u597d<\/li>\n<li>CAP\u6a21\u578b\u5c5e\u4e8eCP\uff0c\u57fa\u4e8eZAB\u4e00\u81f4\u6027\u7b97\u6cd5\u5b9e\u73b0<\/li>\n<\/ul>\n<p>\u7f3a\u70b9\uff1a<\/p>\n<ul>\n<li>\u6027\u80fd\u5e76\u4e0d\u5982Redis\uff08\u4e3b\u8981\u539f\u56e0\u662f\u5728\u5199\u64cd\u4f5c\uff0c\u5373\u83b7\u53d6\u9501\u91ca\u653e\u9501\u90fd\u9700\u8981\u5728Leader\u4e0a\u6267\u884c\uff0c\u7136\u540e\u540c\u6b65\u5230follower\uff09<\/li>\n<li>\u5b9e\u73b0\u590d\u6742\u5ea6\u9ad8<\/li>\n<\/ul>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n<h3>\u57fa\u4e8eRedis<\/h3>\n<h4>\u5b9e\u73b0\u601d\u60f3<\/h4>\n<p>\u4e3b\u8981\u662f\u57fa\u4e8e\u547d\u4ee4\uff1a<code>SETNX key value<\/code><\/p>\n<p>\u547d\u4ee4\u5b98\u65b9\u6587\u6863\uff1a<a href=\"https:\/\/redis.io\/commands\/setnx\" rel=\"nofollow\">https:\/\/redis.io\/commands\/setnx<\/a><\/p>\n<p>\u7528\u6cd5\u53ef\u53c2\u8003\uff1a<a href=\"http:\/\/redisdoc.com\/string\/setnx.html\" rel=\"nofollow\">Redis\u547d\u4ee4\u53c2\u8003<\/a><\/p>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/img.picgo.net\/2024\/10\/16\/image53aa2fed0f15ddf6.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/img.picgo.net\/2024\/10\/16\/image53aa2fed0f15ddf6.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"image\" border=\"0\" \/><\/div><\/p>\n<p>\u5177\u4f53\u6b65\u9aa4<\/p>\n<ol>\n<li>\u83b7\u53d6\u9501\u7684\u65f6\u5019\uff0c\u4f7f\u7528sentx\u52a0\u9501\uff0c\u5e76\u7528expire\u547d\u4ee4\u8bbe\u7f6e\u8d85\u65f6\u65f6\u95f4\uff0cvalue\u8bbe\u4e3a\u4e00\u4e2a\u968f\u673a\u751f\u6210\u7684uuid\uff0c\u91ca\u653e\u9501\u7684\u65f6\u5019\u68c0\u67e5\u662f\u5426\u4e00\u81f4<\/li>\n<li>\u83b7\u53d6\u9501\u7684\u65f6\u5019\uff0c\u8bbe\u7f6e\u4e00\u4e2a\u83b7\u53d6\u9501\u7684\u6700\u5927\u65f6\u95f4\uff0c\u8d85\u8fc7\u8fd9\u4e2a\u65f6\u95f4\u83b7\u53d6\u9501\u5931\u8d25<\/li>\n<li>\u91ca\u653e\u9501\u7684\u65f6\u5019\u901a\u8fc7uuid\u5224\u65ad\u662f\u4e0d\u662f\u8be5\u9501\uff0c\u82e5\u662f\u8be5\u9501\uff0c\u6267\u884cdelete\u91ca\u653e<\/li>\n<\/ol>\n<p>\u4f18\u70b9\uff1a<\/p>\n<ul>\n<li>\u6027\u80fd\u975e\u5e38\u9ad8<\/li>\n<li>\u53ef\u9760\u6027\u8f83\u9ad8<\/li>\n<li>CAP\u6a21\u578b\u5c5e\u4e8eAP<\/li>\n<\/ul>\n<p>\u7f3a\u70b9\uff1a<\/p>\n<ul>\n<li>\u590d\u6742\u5ea6\u8f83\u9ad8<\/li>\n<li>\u65e0\u4e00\u81f4\u6027\u7b97\u6cd5\uff0c\u53ef\u9760\u6027\u5e76\u4e0d\u5982Zookeeper<\/li>\n<li>\u9501\u5220\u9664\u5931\u8d25 \u8fc7\u671f\u65f6\u95f4\u4e0d\u597d\u63a7\u5236<\/li>\n<li>\u975e\u963b\u585e\uff0c\u83b7\u53d6\u5931\u8d25\u540e\uff0c\u9700\u8981\u8f6e\u8be2\u4e0d\u65ad\u5c1d\u8bd5\u83b7\u53d6\u9501\uff0c\u6bd4\u8f83\u6d88\u8017\u6027\u80fd\uff0c\u5360\u7528cpu\u8d44\u6e90<\/li>\n<\/ul>\n<hr \/>\n<h3>\u5206\u5e03\u5f0f\u9501\u5bf9\u6bd4<\/h3>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n<h2>Redis\u5206\u5e03\u5f0f\u9501\u5b9e\u73b0<\/h2>\n<p>\u4ee5\u51cf\u5e93\u5b58\u4f8b\u5b50\u4e3a\u4f8b\uff0c\u8bbf\u95ee\u63a5\u53e3\u65f6\u81ea\u52a8\u51cf\u63a5\u53e3\u5e93\u5b58<\/p>\n<h3>\u65b9\u6848\u4e00<\/h3>\n<pre class=\"code\">@Service\npublic class RedisLockDemo {\n\n    @Autowired\n    private StringRedisTemplate redisTemplate;\n\n    public String deduceStock() {\n        ValueOperations&lt;String, String&gt; valueOperations = redisTemplate.opsForValue();\n\n        \/\/\u83b7\u53d6redis\u4e2d\u7684\u5e93\u5b58\n        int stock = Integer.valueOf(valueOperations.get(\"stock\"));\n        if (stock &gt; 0) {\n            int newStock = stock - 1;\n            valueOperations.set(\"stock\", newStock + \"\");\n            System.out.println(\"\u6263\u51cf\u5e93\u5b58\u6210\u529f, \u5269\u4f59\u5e93\u5b58:\" + newStock);\n        } else {\n            System.out.println(\"\u5e93\u5b58\u5df2\u7ecf\u4e3a0\uff0c\u4e0d\u80fd\u7ee7\u7eed\u6263\u51cf\");\n        }\n\n        return \"success\";\n    }\n}\n\u00a0<\/pre>\n<ul>\n<li>\u5148\u4eceRedis\u4e2d\u8bfb\u53d6stock\u7684\u503c\uff0c\u8868\u793a\u5546\u54c1\u7684\u5e93\u5b58<\/li>\n<li>\u5224\u65ad\u5546\u54c1\u5e93\u5b58\u662f\u5426\u5927\u4e8e0\uff0c\u5982\u679c\u5927\u4e8e0\uff0c\u5219\u5e93\u5b58\u51cf1\uff0c\u7136\u540e\u518d\u4fdd\u5b58\u5230Redis\u91cc\u9762\u53bb\uff0c\u5426\u5219\u5c31\u62a5\u9519<\/li>\n<\/ul>\n<p>\u6539\u8fdb\uff1a<\/p>\n<p>\u4e0a\u8ff0\u4ee3\u7801\u6ca1\u6709\u52a0\u9501\uff0c\u4f1a\u5bfc\u81f4\u5546\u54c1\u8d85\u5356\uff0c\u5728\u540c\u4e00\u65f6\u523b\u591a\u4e2a\u8fdb\u7a0b\u90fd\u5bf9\u5e93\u5b58\u8fdb\u884c\u64cd\u4f5c\uff0c\u6700\u540e\u7ed3\u679c\u4e0a\u53ea\u4f1a\u6267\u884c\u4e00\u6b21\u51cf\u5e93\u5b58<\/p>\n<pre class=\"code\">@Service\npublic class RedisLockDemo {\n\n    @Autowired\n    private StringRedisTemplate redisTemplate;\n\n    public String deduceStock() {\n        ValueOperations&lt;String, String&gt; valueOperations = redisTemplate.opsForValue();\n\n        synchronized (this) {\n            \/\/\u83b7\u53d6redis\u4e2d\u7684\u5e93\u5b58\n            int stock = Integer.valueOf(valueOperations.get(\"stock\"));\n            if (stock &gt; 0) {\n                int newStock = stock - 1;\n                valueOperations.set(\"stock\", newStock + \"\");\n                System.out.println(\"\u6263\u51cf\u5e93\u5b58\u6210\u529f, \u5269\u4f59\u5e93\u5b58:\" + newStock);\n            } else {\n                System.out.println(\"\u5e93\u5b58\u5df2\u7ecf\u4e3a0\uff0c\u4e0d\u80fd\u7ee7\u7eed\u6263\u51cf\");\n            }\n        }\n\n        return \"success\";\n    }\n}<\/pre>\n<p>\u518d\u6539\u8fdb\uff1a<\/p>\n<p>\u7ecf\u8fc7\u4e0a\u8ff0\u6539\u8fdb\u540e\uff0c\u5728\u5355\u4f53\u73af\u5883\u4e0b\u8fd0\u884c\u6ca1\u6709\u95ee\u9898\u4e86\uff0c\u4f46\u662f\u5f53\u4e0d\u540c\u4e3b\u673a\u6765\u8bbf\u95ee\u65f6\uff0c\u4ecd\u4f1a\u53d1\u751f\u8d85\u5356\u95ee\u9898\uff0c<\/p>\n<p>\u6240\u4ee5\u5c31\u9700\u8981\u5206\u5e03\u5f0f\u9501<\/p>\n<hr \/>\n<h3>\u65b9\u6848\u4e8c<\/h3>\n<p>\u5206\u5e03\u5f0f\u9501\u7b80\u5355\u5b9e\u73b0<\/p>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/img.picgo.net\/2024\/10\/16\/image0361d8229f7b5573.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/img.picgo.net\/2024\/10\/16\/image0361d8229f7b5573.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"image\" border=\"0\" \/><\/div><\/p>\n<p>\u4ee3\u7801\u5b9e\u73b0\uff1a<\/p>\n<pre class=\"code\">@Service\npublic class RedisLockDemo {\n    @Autowired\n    private StringRedisTemplate redisTemplate;\n\n    public String deduceStock() {\n        ValueOperations&lt;String, String&gt; valueOperations = redisTemplate.opsForValue();\n        String lockKey = \"product_001\";\n\n        \/\/\u52a0\u9501: setnx\n        Boolean isSuccess = valueOperations.setIfAbsent(lockKey, \"1\");\n        if(null == isSuccess || isSuccess) {\n            System.out.println(\"\u670d\u52a1\u5668\u7e41\u5fd9, \u8bf7\u7a0d\u540e\u91cd\u8bd5\");\n            return \"error\";\n        }\n\n        \/\/------ \u6267\u884c\u4e1a\u52a1\u903b\u8f91 ----start------\n        int stock = Integer.valueOf(valueOperations.get(\"stock\"));\n        if (stock &gt; 0) {\n            int newStock = stock - 1;\n            \/\/\u6267\u884c\u4e1a\u52a1\u64cd\u4f5c\u51cf\u5e93\u5b58\n            valueOperations.set(\"stock\", newStock + \"\");\n            System.out.println(\"\u6263\u51cf\u5e93\u5b58\u6210\u529f, \u5269\u4f59\u5e93\u5b58:\" + newStock);\n        } else {\n            System.out.println(\"\u5e93\u5b58\u5df2\u7ecf\u4e3a0\uff0c\u4e0d\u80fd\u7ee7\u7eed\u6263\u51cf\");\n        }\n        \/\/------ \u6267\u884c\u4e1a\u52a1\u903b\u8f91 ----end------\n\n        \/\/\u91ca\u653e\u9501\n        redisTemplate.delete(lockKey);\n        return \"success\";\n    }\n}\n\u00a0<\/pre>\n<p>\u5176\u5b9e\u5c31\u662f\u5bf9\u6bcf\u4e00\u4e2a\u5546\u54c1\u52a0\u4e00\u628a\u9501\uff0c\u4ee3\u7801\u91cc\u9762\u662fproduct_001<\/p>\n<ul>\n<li>\u4f7f\u7528setnx\u5bf9\u5546\u54c1\u8fdb\u884c\u52a0\u9501<\/li>\n<li>\u5982\u6210\u529f\u8bf4\u660e\u52a0\u9501\u6210\u529f\uff0c\u5982\u5931\u8d25\u8bf4\u660e\u6709\u5176\u4ed6\u8bf7\u6c42\u62a2\u5360\u4e86\u8be5\u5546\u54c1\u7684\u9501\uff0c\u5219\u5f53\u524d\u8bf7\u6c42\u5931\u8d25\u9000\u51fa<\/li>\n<li>\u52a0\u9501\u6210\u529f\u4e4b\u540e\u8fdb\u884c\u6263\u51cf\u5e93\u5b58\u64cd\u4f5c<\/li>\n<li>\u5220\u9664\u5546\u54c1\u9501<\/li>\n<\/ul>\n<p>\u6539\u8fdb1\uff1a<\/p>\n<p>\u52a0\u9501\u6210\u529f\u4e4b\u540e\uff0c\u6263\u51cf\u5e93\u5b58\u7684\u903b\u8f91\u53ef\u80fd\u629b\u5f02\u5e38\u4e86\uff0c\u5373\u5e76\u4e0d\u4f1a\u6267\u884c\u5230\u91ca\u653e\u9501\u7684\u903b\u8f91\uff0c\u90a3\u4e48\u8be5\u5546\u54c1\u9501\u662f\u4e00\u76f4\u6ca1\u6709\u91ca\u653e\uff0c\u4f1a\u6210\u4e3a\u6b7b\u9501\u7684\uff0c\u5176\u4ed6\u8bf7\u6c42\u5b8c\u5168\u65e0\u6cd5\u6263\u51cf\u8be5\u5546\u54c1\u7684<\/p>\n<p>\u4f7f\u7528try&#8230;catch&#8230;finally\u9632\u6b62\u6b7b\u9501\u95ee\u9898<\/p>\n<pre class=\"code\">\u00a0@Service\npublic class RedisLockDemo {\n    @Autowired\n    private StringRedisTemplate redisTemplate;\n\n    public String deduceStock() {\n        ValueOperations&lt;String, String&gt; valueOperations = redisTemplate.opsForValue();\n        String lockKey = \"product_001\";\n\n        try {\n            \/\/\u52a0\u9501: setnx\n            Boolean isSuccess = valueOperations.setIfAbsent(lockKey, \"1\");\n            if(null == isSuccess || isSuccess) {\n                System.out.println(\"\u670d\u52a1\u5668\u7e41\u5fd9, \u8bf7\u7a0d\u540e\u91cd\u8bd5\");\n                return \"error\";\n            }\n\n            \/\/------ \u6267\u884c\u4e1a\u52a1\u903b\u8f91 ----start------\n            int stock = Integer.valueOf(valueOperations.get(\"stock\"));\n            if (stock &gt; 0) {\n                int newStock = stock - 1;\n                \/\/\u6267\u884c\u4e1a\u52a1\u64cd\u4f5c\u51cf\u5e93\u5b58\n                valueOperations.set(\"stock\", newStock + \"\");\n                System.out.println(\"\u6263\u51cf\u5e93\u5b58\u6210\u529f, \u5269\u4f59\u5e93\u5b58:\" + newStock);\n            } else {\n                System.out.println(\"\u5e93\u5b58\u5df2\u7ecf\u4e3a0\uff0c\u4e0d\u80fd\u7ee7\u7eed\u6263\u51cf\");\n            }\n            \/\/------ \u6267\u884c\u4e1a\u52a1\u903b\u8f91 ----end------\n        } finally {\n            \/\/\u91ca\u653e\u9501\n            redisTemplate.delete(lockKey);\n        }\n\n        return \"success\";\n    }\n}<\/pre>\n<p>\u6539\u8fdb2\uff1a<\/p>\n<p>\u9664\u4e86\u629b\u5f02\u5e38\u4e4b\u5916\uff0c\u6bd4\u5982\u7a0b\u5e8f\u5d29\u6e83\u3001\u670d\u52a1\u5668\u5b95\u673a\u3001\u670d\u52a1\u5668\u91cd\u542f\u3001\u8bf7\u6c42\u8d85\u65f6\u88ab\u7ec8\u6b62\u3001\u53d1\u5e03\u3001\u4eba\u4e3akill\u7b49\u90fd\u6709\u53ef\u80fd\u5bfc\u81f4\u91ca\u653e\u9501\u7684\u903b\u8f91\u6ca1\u6709\u6267\u884c\uff0c\u6bd4\u5982\u5bf9\u5546\u54c1\u52a0\u5206\u5e03\u5f0f\u9501\u6210\u529f\u4e4b\u540e\uff0c\u5728\u6263\u51cf\u5e93\u5b58\u7684\u65f6\u5019\u670d\u52a1\u5668\u6b63\u5728\u6267\u884c\u91cd\u542f\uff0c\u4f1a\u5bfc\u81f4\u6ca1\u6709\u6267\u884c\u91ca\u653e\u9501\u3002<\/p>\n<p>\u53ef\u4ee5\u901a\u8fc7\u5bf9\u9501\u8bbe\u7f6e\u8d85\u65f6\u65f6\u95f4\u6765\u9632\u6b62\u6b7b\u9501\u7684\u53d1\u751f\uff0c\u4f7f\u7528Redis\u7684expire\u547d\u4ee4\u53ef\u4ee5\u5bf9key\u8fdb\u884c\u8bbe\u7f6e\u8d85\u65f6\u65f6\u95f4<\/p>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/img.picgo.net\/2024\/10\/16\/image0085eead8a55eac7.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/img.picgo.net\/2024\/10\/16\/image0085eead8a55eac7.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"image\" border=\"0\" \/><\/div><\/p>\n<p>\u4ee3\u7801\u5b9e\u73b0\uff1a<\/p>\n<pre class=\"code\">\u00a0@Service\npublic class RedisLockDemo {\n    @Autowired\n    private StringRedisTemplate redisTemplate;\n\n    public String deduceStock() {\n        ValueOperations&lt;String, String&gt; valueOperations = redisTemplate.opsForValue();\n        String lockKey = \"product_001\";\n\n        try {\n            \/\/\u52a0\u9501: setnx\n            Boolean isSuccess = valueOperations.setIfAbsent(lockKey, \"1\");\n            \/\/expire\u589e\u52a0\u8d85\u65f6\u65f6\u95f4\n            redisTemplate.expire(lockKey, 10, TimeUnit.SECONDS);\n            if(null == isSuccess || isSuccess) {\n                System.out.println(\"\u670d\u52a1\u5668\u7e41\u5fd9, \u8bf7\u7a0d\u540e\u91cd\u8bd5\");\n                return \"error\";\n            }\n\n            \/\/------ \u6267\u884c\u4e1a\u52a1\u903b\u8f91 ----start------\n            int stock = Integer.valueOf(valueOperations.get(\"stock\"));\n            if (stock &gt; 0) {\n                int newStock = stock - 1;\n                \/\/\u6267\u884c\u4e1a\u52a1\u64cd\u4f5c\u51cf\u5e93\u5b58\n                valueOperations.set(\"stock\", newStock + \"\");\n                System.out.println(\"\u6263\u51cf\u5e93\u5b58\u6210\u529f, \u5269\u4f59\u5e93\u5b58:\" + newStock);\n            } else {\n                System.out.println(\"\u5e93\u5b58\u5df2\u7ecf\u4e3a0\uff0c\u4e0d\u80fd\u7ee7\u7eed\u6263\u51cf\");\n            }\n            \/\/------ \u6267\u884c\u4e1a\u52a1\u903b\u8f91 ----end------\n        } finally {\n            \/\/\u91ca\u653e\u9501\n            redisTemplate.delete(lockKey);\n        }\n\n        return \"success\";\n    }\n}<\/pre>\n<p>\u6539\u8fdb3\uff1a<br \/>\u8bbe\u7f6e\u8d85\u65f6\u65f6\u95f4\u4e0d\u662f\u539f\u5b50\u64cd\u4f5c\uff0c\u90a3\u4e48\u4ecd\u7136\u65e0\u6cd5\u907f\u514d\u6b7b\u9501\u95ee\u9898<\/p>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/img.picgo.net\/2024\/10\/16\/imagea694d806eb990a0c.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/img.picgo.net\/2024\/10\/16\/imagea694d806eb990a0c.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"image\" border=\"0\" \/><\/div><\/p>\n<p>\u5bf9\u6b64\uff0c\u6709\u4e24\u79cd\u505a\u6cd5\uff1a<\/p>\n<p>lua\u811a\u672c<br \/>set\u539f\u751f\u547d\u4ee4\uff08Redis 2.6.12\u7248\u672c\u53ca\u4ee5\u4e0a\uff09<\/p>\n<p>\u4e00\u822c\u662f\u63a8\u8350\u4f7f\u7528set\u547d\u4ee4\uff0cRedis\u5b98\u65b9\u57282.6.12\u7248\u672c\u5bf9set\u547d\u4ee4\u589e\u52a0\u4e86NX\u3001EX\u3001PX\u7b49\u53c2\u6570\uff0c\u5373\u53ef\u4ee5\u5c06\u4e0a\u9762\u7684\u52a0\u9501\u548c\u8bbe\u7f6e\u65f6\u95f4\u653e\u5230\u4e00\u6761\u547d\u4ee4\u4e0a\u6267\u884c\uff0c\u901a\u8fc7set\u547d\u4ee4\u5373\u53ef\uff1a<\/p>\n<p>\u547d\u4ee4\u5b98\u65b9\u6587\u6863\uff1a<a href=\"https:\/\/redis.io\/commands\/set\">https:\/\/redis.io\/commands\/set<\/a><\/p>\n<p>\u7528\u6cd5\u53ef\u53c2\u8003\uff1a<a href=\"https:\/\/link.csdn.net\/?from_id=114296755&amp;target=http%3A%2F%2Fredisdoc.com%2Fstring%2Fset.html\">Redis\u547d\u4ee4\u53c2\u8003<\/a><\/p>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/img.picgo.net\/2024\/10\/16\/imagef217968cf6125598.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/img.picgo.net\/2024\/10\/16\/imagef217968cf6125598.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"image\" border=\"0\" \/><\/div><\/p>\n<p>\u4ee3\u7801\u5b9e\u73b0\uff1a<\/p>\n<pre class=\"code\">@Service\npublic class RedisLockDemo {\n    @Autowired\n    private StringRedisTemplate redisTemplate;\n\n    public String deduceStock() {\n        ValueOperations&lt;String, String&gt; valueOperations = redisTemplate.opsForValue();\n        String lockKey = \"product_001\";\n\n        try {\n            \/\/\u52a0\u9501: setnx \u548c expire\u589e\u52a0\u8d85\u65f6\u65f6\u95f4\n            Boolean isSuccess = valueOperations.setIfAbsent(lockKey, \"1\", 10, TimeUnit.SECONDS);\n            if(null == isSuccess || isSuccess) {\n                System.out.println(\"\u670d\u52a1\u5668\u7e41\u5fd9, \u8bf7\u7a0d\u540e\u91cd\u8bd5\");\n                return \"error\";\n            }\n\n            \/\/------ \u6267\u884c\u4e1a\u52a1\u903b\u8f91 ----start------\n            int stock = Integer.valueOf(valueOperations.get(\"stock\"));\n            if (stock &gt; 0) {\n                int newStock = stock - 1;\n                \/\/\u6267\u884c\u4e1a\u52a1\u64cd\u4f5c\u51cf\u5e93\u5b58\n                valueOperations.set(\"stock\", newStock + \"\");\n                System.out.println(\"\u6263\u51cf\u5e93\u5b58\u6210\u529f, \u5269\u4f59\u5e93\u5b58:\" + newStock);\n            } else {\n                System.out.println(\"\u5e93\u5b58\u5df2\u7ecf\u4e3a0\uff0c\u4e0d\u80fd\u7ee7\u7eed\u6263\u51cf\");\n            }\n            \/\/------ \u6267\u884c\u4e1a\u52a1\u903b\u8f91 ----end------\n        } finally {\n            \/\/\u91ca\u653e\u9501\n            redisTemplate.delete(lockKey);\n        }\n\n        return \"success\";\n    }\n}\n\u00a0<\/pre>\n<p>\u6539\u8fdb4\uff1a<\/p>\n<p>\u5728\u9ad8\u5e76\u53d1\u573a\u666f\u4e0b\uff0c\u8d85\u65f6\u65f6\u95f4\u8bbe\u7f6e\u4e0d\u5408\u7406\u95ee\u9898<\/p>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/img.picgo.net\/2024\/10\/16\/image7b717f68b14b974b.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/img.picgo.net\/2024\/10\/16\/image7b717f68b14b974b.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"image\" border=\"0\" \/><\/div><\/p>\n<p>\u6d41\u7a0b\uff1a<\/p>\n<ul>\n<li>\u8fdb\u7a0bA\u52a0\u9501\u4e4b\u540e\uff0c\u6263\u51cf\u5e93\u5b58\u7684\u65f6\u95f4\u8d85\u8fc7\u8bbe\u7f6e\u7684\u8d85\u65f6\u65f6\u95f4\uff0c\u8fd9\u91cc\u8bbe\u7f6e\u7684\u9501\u662f10\u79d2<\/li>\n<li>\u5728\u7b2c10\u79d2\u7684\u65f6\u5019\u7531\u4e8e\u65f6\u95f4\u5230\u671f\u4e86\u6240\u4ee5\u8fdb\u7a0bA\u8bbe\u7f6e\u7684\u9501\u88abRedis\u91ca\u653e\u4e86\uff08T5\uff09<\/li>\n<li>\u521a\u597d\u8fdb\u7a0bB\u8bf7\u6c42\u8fdb\u6765\u4e86\uff0c\u52a0\u9501\u6210\u529f\uff08T6\uff09<\/li>\n<li>\u8fdb\u7a0bA\u64cd\u4f5c\u5b8c\u6210\uff08\u6263\u51cf\u5e93\u5b58\uff09\u4e4b\u540e\uff0c\u628a\u8fdb\u7a0bB\u8bbe\u7f6e\u7684\u9501\u7ed9\u91ca\u653e\u4e86<\/li>\n<li>\u521a\u597d\u8fdb\u7a0bC\u8bf7\u6c42\u8fdb\u6765\u4e86\uff0c\u52a0\u9501\u6210\u529f<\/li>\n<li>\u8fdb\u7a0bB\u64cd\u4f5c\u5b8c\u6210\u4e4b\u540e\uff0c\u4e5f\u628a\u8fdb\u7a0bC\u8bbe\u7f6e\u7684\u9501\u7ed9\u91ca\u653e\u4e86<\/li>\n<li>\u4ee5\u6b64\u7c7b\u63a8\u2026<\/li>\n<\/ul>\n<p>\u89e3\u51b3\u65b9\u6cd5\uff1a<\/p>\n<ul>\n<li>\u52a0\u9501\u7684\u65f6\u5019\uff0c\u628a\u503c\u8bbe\u7f6e\u4e3a\u552f\u4e00\u503c\uff0c\u6bd4\u5982\u8bf4UUID\u8fd9\u79cd\u968f\u673a\u6570<\/li>\n<li>\u91ca\u653e\u9501\u7684\u65f6\u5019\uff0c\u83b7\u53d6\u9501\u7684\u503c\u5224\u65advalue\u662f\u4e0d\u662f\u5f53\u524d\u8fdb\u7a0b\u8bbe\u7f6e\u7684\u552f\u4e00\u503c\uff0c\u5982\u679c\u662f\u518d\u53bb\u5220\u9664<\/li>\n<\/ul>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/img.picgo.net\/2024\/10\/16\/imagefc09fa23fc847b60.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/img.picgo.net\/2024\/10\/16\/imagefc09fa23fc847b60.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"image\" border=\"0\" \/><\/div><\/p>\n<p>\u4ee3\u7801\u5b9e\u73b0\uff1a<\/p>\n<pre class=\"code\">@Service\npublic class RedisLockDemo {\n    @Autowired\n    private StringRedisTemplate redisTemplate;\n\n    public String deduceStock() {\n        ValueOperations&lt;String, String&gt; valueOperations = redisTemplate.opsForValue();\n        String lockKey = \"product_001\";\n        String clientId = UUID.randomUUID().toString();\n\n        try {\n            \/\/\u52a0\u9501: setnx \u548c expire\u589e\u52a0\u8d85\u65f6\u65f6\u95f4\n            Boolean isSuccess = valueOperations.setIfAbsent(lockKey, clientId, 10, TimeUnit.SECONDS);\n            if(null == isSuccess || isSuccess) {\n                System.out.println(\"\u670d\u52a1\u5668\u7e41\u5fd9, \u8bf7\u7a0d\u540e\u91cd\u8bd5\");\n                return \"error\";\n            }\n\n            \/\/------ \u6267\u884c\u4e1a\u52a1\u903b\u8f91 ----start------\n            int stock = Integer.valueOf(valueOperations.get(\"stock\"));\n            if (stock &gt; 0) {\n                int newStock = stock - 1;\n                \/\/\u6267\u884c\u4e1a\u52a1\u64cd\u4f5c\u51cf\u5e93\u5b58\n                valueOperations.set(\"stock\", newStock + \"\");\n                System.out.println(\"\u6263\u51cf\u5e93\u5b58\u6210\u529f, \u5269\u4f59\u5e93\u5b58:\" + newStock);\n            } else {\n                System.out.println(\"\u5e93\u5b58\u5df2\u7ecf\u4e3a0\uff0c\u4e0d\u80fd\u7ee7\u7eed\u6263\u51cf\");\n            }\n            \/\/------ \u6267\u884c\u4e1a\u52a1\u903b\u8f91 ----end------\n        } finally {\n            if (clientId.equals(valueOperations.get(lockKey))) {\n                \/\/\u91ca\u653e\u9501\n                redisTemplate.delete(lockKey);\n            }\n        }\n\n        return \"success\";\n    }\n}<\/pre>\n<p>\u6539\u8fdb5\uff1a<\/p>\n<p>\u4e0a\u8ff0\u65b9\u6cd5\u8fd8\u6709\u95ee\u9898\uff0c\u90a3\u5c31\u662fdel\u548cget\u5e76\u975e\u539f\u5b50\u64cd\u4f5c<\/p>\n<p>\u90a3\u4e48\u5220\u9664\u9501\u7684\u6b63\u786e\u59ff\u52bf\u662f\u4f7f\u7528<strong>lua\u811a\u672c<\/strong>\uff0c\u901a\u8fc7redis\u7684<strong>eval\/evalsha<\/strong>\u547d\u4ee4\u6765\u8fd0\u884c\uff1a<\/p>\n<pre class=\"code\">-- lua\u5220\u9664\u9501\uff1a\n-- KEYS\u548cARGV\u5206\u522b\u662f\u4ee5\u96c6\u5408\u65b9\u5f0f\u4f20\u5165\u7684\u53c2\u6570\uff0c\u5bf9\u5e94\u4e0a\u6587\u7684Test\u548cuuid\u3002\n-- \u5982\u679c\u5bf9\u5e94\u7684value\u7b49\u4e8e\u4f20\u5165\u7684uuid\u3002\nif redis.call('get', KEYS[1]) == ARGV[1] \n    then \n\t-- \u6267\u884c\u5220\u9664\u64cd\u4f5c\n        return redis.call('del', KEYS[1]) \n    else \n\t-- \u4e0d\u6210\u529f\uff0c\u8fd4\u56de0\n        return 0 \nend <\/pre>\n<p>\u5230\u6b64\uff0c\u57fa\u672c\u4e0aRedis\u7684\u5206\u5e03\u5f0f\u9501\u7684\u5b9e\u73b0\u601d\u60f3\u5982\u4e0b\uff1a<\/p>\n<ul>\n<li>\u83b7\u53d6\u9501\u7684\u65f6\u5019\uff0c\u4f7f\u7528setnx\u52a0\u9501\uff0c\u5e76\u4f7f\u7528expire\u547d\u4ee4\u4e3a\u9501\u6dfb\u52a0\u4e00\u4e2a\u8d85\u65f6\u65f6\u95f4\uff0c\u8d85\u8fc7\u8be5\u65f6\u95f4\u5219\u81ea\u52a8\u91ca\u653e\u9501\uff0c\u9501\u7684value\u503c\u4e3a\u4e00\u4e2a\u968f\u673a\u751f\u6210\u7684UUID\uff0c\u901a\u8fc7\u6b64\u5728\u91ca\u653e\u9501\u7684\u65f6\u5019\u8fdb\u884c\u5224\u65ad\u3002<\/li>\n<li>\u83b7\u53d6\u9501\u7684\u65f6\u5019\u8fd8\u8bbe\u7f6e\u4e00\u4e2a\u83b7\u53d6\u7684\u8d85\u65f6\u65f6\u95f4\uff0c\u82e5\u8d85\u8fc7\u8fd9\u4e2a\u65f6\u95f4\u5219\u653e\u5f03\u83b7\u53d6\u9501\u3002<\/li>\n<li>\u91ca\u653e\u9501\u7684\u65f6\u5019\uff0c\u901a\u8fc7UUID\u5224\u65ad\u662f\u4e0d\u662f\u8be5\u9501\uff0c\u82e5\u662f\u8be5\u9501\uff0c\u5219\u6267\u884cdelete\u8fdb\u884c\u9501\u91ca\u653e\u3002<\/li>\n<\/ul>\n<p>\u6539\u8fdb6\uff1a<\/p>\n<p>\u4e0a\u8ff0\u65b9\u6848\u89e3\u51b3\u4e86\u5220\u9664\u9519\u9501\u7684\u95ee\u9898\uff0c\u4f46\u8bbe\u7f6e\u8d85\u65f6\u65f6\u95f4\u4ecd\u7136\u662f\u4e2a\u68d8\u624b\u7684\u95ee\u9898<\/p>\n<p>\u76ee\u524d\u5927\u516c\u53f8\u7684\u4e00\u4e2a\u65b9\u6848\u662f\u8fd9\u6837\u5b50\u7684\uff1a<\/p>\n<ul>\n<li>\u5728\u52a0\u9501\u6210\u529f\u4e4b\u540e\uff0c\u542f\u52a8\u4e00\u4e2a\u5b88\u62a4\u7ebf\u7a0b<\/li>\n<li>\u5b88\u62a4\u7ebf\u7a0b\u6bcf\u96941\/3\u7684\u9501\u7684\u8d85\u65f6\u65f6\u95f4\u5c31\u53bb\u5ef6\u8fdf\u9501\u7684\u8d85\u65f6\u65f6\u95f4\uff0c\u6bd4\u5982\u8bf4\u9501\u8bbe\u7f6e\u4e3a30\u79d2\uff0c\u90a3\u5c31\u662f\u6bcf\u969410\u79d2\u5c31\u53bb\u5ef6\u957f\u9501\u7684\u8d85\u65f6\u65f6\u95f4\uff0c\u91cd\u65b0\u8bbe\u7f6e\u4e3a30\u79d2<\/li>\n<li>\u4e1a\u52a1\u4ee3\u7801\u6267\u884c\u5b8c\u6210\uff0c\u5173\u95ed\u5b88\u62a4\u7ebf\u7a0b<\/li>\n<\/ul>\n<p>\u5728\u5b9e\u9645\u64cd\u4f5c\u4e2d\uff0c\u9700\u8981\u6ce8\u610f\u51e0\u70b9\uff1a<\/p>\n<ul>\n<li>\u53ea\u7eed\u5bf9\u7684\uff1a\u548c\u91ca\u653e\u9501\u4e00\u6837\uff0c\u9700\u8981\u5224\u65ad\u9501\u7684\u5bf9\u8c61\u6709\u6ca1\u6709\u53d1\u751f\u53d8\u5316\uff0c\u5426\u5219\u4f1a\u9020\u6210\u65e0\u8bba\u8c01\u52a0\u9501\uff0c\u5b88\u62a4\u7ebf\u7a0b\u90fd\u4f1a\u91cd\u65b0\u8bbe\u7f6e\u9501\u7684\u8d85\u65f6\u65f6\u95f4<\/li>\n<li>\u4e0d\u80fd\u52a8\u4e0d\u52a8\u5c31\u7eed\uff1a\u5b88\u62a4\u7ebf\u7a0b\u8981\u5728\u5408\u7406\u7684\u65f6\u95f4\u518d\u53bb\u8bbe\u7f6e\u9501\u7684\u8d85\u65f6\u65f6\u95f4\uff0c\u5426\u5219\u4f1a\u9020\u6210\u8d44\u6e90\u7684\u6d6a\u8d39<\/li>\n<li>\u53ca\u65f6\u9500\u6bc1\uff1a\u5982\u679c\u52a0\u9501\u7684\u7ebf\u7a0b\/\u8fdb\u7a0b\u5df2\u7ecf\u5904\u7406\u5b8c\u4e1a\u52a1\u4e86\uff0c\u90a3\u4e48\u5b88\u62a4\u8fdb\u7a0b\u5e94\u8be5\u88ab\u9500\u6bc1\uff0c\u5426\u5219\u4f1a\u9020\u6210\u8d44\u6e90\u7684\u6d6a\u8d39<\/li>\n<\/ul>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n<h3>\u65b9\u6848\u4e09<\/h3>\n<p>\u4e0a\u9762\u7684\u65b9\u6848\u8fd8\u5f97\u8003\u8651Redis\u7684\u90e8\u7f72\u95ee\u9898\u3002<\/p>\n<p>\u4f17\u6240\u5468\u77e5\uff0cRedis\u67093\u79cd\u90e8\u7f72\u65b9\u5f0f\uff1a<\/p>\n<p>\u5355\u673a\u6a21\u5f0f<br \/>Master-Slave + Sentinel\uff08\u54e8\u5175\uff09\u9009\u4e3e\u6a21\u5f0f<br \/>Redis Cluster\uff08\u96c6\u7fa4\uff09\u6a21\u5f0f<\/p>\n<p>\u4f7f\u7528 Redis \u505a\u5206\u5e03\u5f0f\u9501\u7684\u7f3a\u70b9\u5728\u4e8e\uff1a\u5982\u679c\u91c7\u7528\u5355\u673a\u90e8\u7f72\u6a21\u5f0f\uff0c\u4f1a\u5b58\u5728\u5355\u70b9\u95ee\u9898\uff0c\u53ea\u8981 Redis \u6545\u969c\u4e86\u3002\u52a0\u9501\u5c31\u4e0d\u884c\u4e86\u3002<\/p>\n<p>\u91c7\u7528 Master-Slave \u6a21\u5f0f\/\u96c6\u7fa4\u6a21\u5f0f\uff0c<\/p>\n<pre class=\"code\">\u00a0\u7ebf\u7a0b1\u52a0\u4e86\u9501\u53bb\u6267\u884c\u4e1a\u52a1\u4e86\n\u521a\u597dRedis\u7684 master \u53d1\u751f\u6545\u969c\u6302\u6389\u4e86\uff0c\u6b64\u65f6\u8fd8\u6ca1\u6709\u5c06\u6570\u636e\u540c\u6b65\u5230 slave \u4e0a\n\u96c6\u7fa4\u4f1a\u9009\u4e3e\u4e00\u4e2a\u65b0\u7684 master \u51fa\u6765\uff0c\u4f46\u662f\u65b0\u7684 master \u4e0a\u5e76\u6ca1\u6709\u8fd9\u4e2a\u9501\n\u7ebf\u7a0b2\u53ef\u4ee5\u5728\u65b0\u9009\u4e3e\u4ea7\u751f\u7684 master \u4e0a\u53bb\u52a0\u9501\uff0c\u7136\u540e\u5904\u7406\u4e1a\u52a1<\/pre>\n<p>\u8fd9\u6837\u7684\u8bdd\uff0c\u5c31\u5bfc\u81f4\u4e86\u4e24\u4e2a\u7ebf\u7a0b\u540c\u65f6\u6301\u6709\u4e86\u9501\uff0c\u9501\u5c31\u4e0d\u518d\u5177\u6709\u5b89\u5168\u6027\u3002<\/p>\n<p>\u9488\u5bf9\u8fd9\u4e2a\u95ee\u9898\uff0c\u6709\u4e24\u4e2a\u89e3\u51b3\u65b9\u6848\uff1a<\/p>\n<ul>\n<li>RedLock<\/li>\n<li><strong>Zookeeper<\/strong>\u3010\u63a8\u8350\u3011<\/li>\n<\/ul>\n<h4>RedLock<\/h4>\n<p>\u57fa\u4e8e\u4ee5\u4e0a\u7684\u8003\u8651\uff0cRedis\u7684\u4f5c\u8005\u63d0\u51fa\u4e86\u4e00\u4e2aRedLock\u7684\u7b97\u6cd5\u3002<\/p>\n<p>\u8fd9\u4e2a\u7b97\u6cd5\u7684\u610f\u601d\u5927\u6982\u662f\u8fd9\u6837\u7684\uff1a\u5047\u8bbe Redis \u7684\u90e8\u7f72\u6a21\u5f0f\u662f Redis Cluster\uff0c\u603b\u5171\u6709 5 \u4e2a Master \u8282\u70b9\u3002<\/p>\n<p>\u901a\u8fc7\u4ee5\u4e0b\u6b65\u9aa4\u83b7\u53d6\u4e00\u628a\u9501\uff1a<\/p>\n<ul>\n<li>\u83b7\u53d6\u5f53\u524d\u65f6\u95f4\u6233\uff0c\u5355\u4f4d\u662f\u6beb\u79d2\u3002<\/li>\n<li>\u8f6e\u6d41\u5c1d\u8bd5\u5728\u6bcf\u4e2a Master \u8282\u70b9\u4e0a\u521b\u5efa\u9501\uff0c\u8fc7\u671f\u65f6\u95f4\u8bbe\u7f6e\u8f83\u77ed\uff0c\u4e00\u822c\u5c31\u51e0\u5341\u6beb\u79d2\u3002<\/li>\n<li>\u5c1d\u8bd5\u5728\u5927\u591a\u6570\u8282\u70b9\u4e0a\u5efa\u7acb\u4e00\u4e2a\u9501\uff0c\u6bd4\u5982 5 \u4e2a\u8282\u70b9\u5c31\u8981\u6c42\u662f 3 \u4e2a\u8282\u70b9\uff08n \/ 2 +1\uff09\u3002<\/li>\n<li>\u5ba2\u6237\u7aef\u8ba1\u7b97\u5efa\u7acb\u597d\u9501\u7684\u65f6\u95f4\uff0c\u5982\u679c\u5efa\u7acb\u9501\u7684\u65f6\u95f4\u5c0f\u4e8e\u8d85\u65f6\u65f6\u95f4\uff0c\u5c31\u7b97\u5efa\u7acb\u6210\u529f\u4e86\u3002<\/li>\n<li>\u8981\u662f\u9501\u5efa\u7acb\u5931\u8d25\u4e86\uff0c\u90a3\u4e48\u5c31\u4f9d\u6b21\u5220\u9664\u8fd9\u4e2a\u9501\u3002<\/li>\n<li>\u53ea\u8981\u522b\u4eba\u5efa\u7acb\u4e86\u4e00\u628a\u5206\u5e03\u5f0f\u9501\uff0c\u4f60\u5c31\u5f97\u4e0d\u65ad\u8f6e\u8be2\u53bb\u5c1d\u8bd5\u83b7\u53d6\u9501\u3002<\/li>\n<\/ul>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/img.picgo.net\/2024\/10\/16\/imageeb592cd1f32f4af9.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/img.picgo.net\/2024\/10\/16\/imageeb592cd1f32f4af9.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"image\" border=\"0\" \/><\/div><\/p>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n<h2>Redission<\/h2>\n<p>\u76ee\u524d\u4e1a\u754c\u5bf9\u4e8eRedis\u7684\u5206\u5e03\u5f0f\u9501\u6709\u4e86\u73b0\u6210\u7684\u5b9e\u73b0\u65b9\u6848\u4e86\uff0c\u6bd4\u8f83\u51fa\u540d\u7684\u662fRedisson\u5f00\u6e90\u6846\u67b6\u3002<\/p>\n<p>Redisson \u662f Redis \u7684 Java \u5b9e\u73b0\u7684\u5ba2\u6237\u7aef\uff0c\u5176 API \u63d0\u4f9b\u4e86\u6bd4\u8f83\u5168\u9762\u7684 Redis \u547d\u4ee4\u7684\u652f\u6301\u3002<\/p>\n<p>Redission \u901a\u8fc7 Netty \u652f\u6301\u975e\u963b\u585e I\/O\u3002<\/p>\n<p>Redisson \u5c01\u88c5\u4e86\u9501\u7684\u5b9e\u73b0\uff0c\u8ba9\u6211\u4eec\u50cf\u64cd\u4f5c\u6211\u4eec\u7684\u672c\u5730 Lock\u4e00\u6837\u6765\u4f7f\u7528\uff0c\u9664\u6b64\u4e4b\u5916\u8fd8\u6709\u5bf9\u96c6\u5408\u3001\u5bf9\u8c61\u3001\u5e38\u7528\u7f13\u5b58\u6846\u67b6\u7b49\u505a\u4e86\u53cb\u597d\u7684\u5c01\u88c5\uff0c\u6613\u4e8e\u4f7f\u7528\u3002<\/p>\n<p>\u9664\u6b64\u4e4b\u5916\uff0cRedisson\u8fd8\u5b9e\u73b0\u4e86\u5206\u5e03\u5f0f\u9501\u7684\u81ea\u52a8\u7eed\u671f\u673a\u5236\u3001\u9501\u7684\u4e92\u65a5\u81ea\u7b49\u5f85\u673a\u5236\u3001\u9501\u7684\u53ef\u91cd\u5165\u52a0\u9501\u4e8e\u91ca\u653e\u9501\u7684\u673a\u5236\uff0c\u53ef\u4ee5\u8bf4Redisson\u5bf9\u5206\u5e03\u5f0f\u9501\u7684\u5b9e\u73b0\u662f\u5b9e\u73b0\u4e86\u4e00\u6574\u5957\u673a\u5236\u7684\u3002<\/p>\n<p>Redisson \u53ef\u4ee5\u4fbf\u6377\u7684\u652f\u6301\u591a\u79cdRedis\u90e8\u7f72\u67b6\u6784\uff1a<\/p>\n<ul>\n<li>\u5355\u673a\u6a21\u5f0f<\/li>\n<li>Master-Slave + Sentinel\uff08\u54e8\u5175\uff09\u9009\u4e3e\u6a21\u5f0f<\/li>\n<li>Redis Cluster\uff08\u96c6\u7fa4\uff09\u6a21\u5f0f<\/li>\n<\/ul>\n<p>\u5f15\u5165Redission\u4e4b\u540e\uff0c\u4f7f\u7528\u4e0a\u975e\u5e38\u7b80\u5355\uff0cRedissonClient\u5ba2\u6237\u7aef\u63d0\u4f9b\u4e86\u4f17\u591a\u7684\u63a5\u53e3\u5b9e\u73b0\uff0c\u652f\u6301\u53ef\u91cd\u5165\u9501\u3001\u516c\u5e73\u9501\u3001\u8bfb\u5199\u9501\u3001\u9501\u8d85\u65f6\u3001RedLock\u7b49\u90fd\u63d0\u4f9b\u4e86\u5b8c\u6574\u5b9e\u73b0\u3002<\/p>\n<p>\u4f7f\u7528\u5982\u4e0b\uff1a<\/p>\n<p>\u5f15\u5165maven<\/p>\n<pre class=\"code\">\u00a0\n    \n    org.redisson\n    redisson-spring-boot-starter\n    3.13.4<\/pre>\n<p>\u589e\u52a0\u914d\u7f6e\u6587\u4ef6<\/p>\n<pre class=\"code\">@Configuration\npublic class RedissonConfig {\n \n    @Bean\n    public Redisson redisson() {\n        Config config = new Config();\n        \/\/\u5355\u673a\u7248\n        \/\/config.useSingleServer().setAddress(\"redis:\/\/192.168.1.1:8001\").setDatabase(0);\n \n        \/\/\u96c6\u7fa4\u7248\n        config.useClusterServers()\n                .addNodeAddress(\"redis:\/\/192.168.1.1:8001\")\n                .addNodeAddress(\"redis:\/\/192.168.1.1:8002\")\n                .addNodeAddress(\"redis:\/\/192.168.1.2:8001\")\n                .addNodeAddress(\"redis:\/\/192.168.1.2:8002\")\n                .addNodeAddress(\"redis:\/\/192.168.1.3:8001\")\n                .addNodeAddress(\"redis:\/\/192.168.1.3:8002\");\n        return (Redisson) Redisson.create(config);\n    }\n} <\/pre>\n<p>\u5206\u5e03\u5f0f\u9501\u5b9e\u73b0<\/p>\n<pre class=\"code\">\u00a0@Service\npublic class RedisLockDemo {\n    @Autowired\n    private StringRedisTemplate redisTemplate;\n \n    @Autowired\n    private Redisson redisson;\n \n    public String deduceStock() {\n        String lockKey = \"lockKey\";\n        RLock redissonLock = redisson.getLock(lockKey);\n \n        try {\n            \/\/\u52a0\u9501(\u8d85\u65f6\u9ed8\u8ba430s), \u5b9e\u73b0\u9501\u7eed\u547d\u7684\u529f\u80fd(\u540e\u53f0\u542f\u52a8\u4e00\u4e2atimer, \u9ed8\u8ba4\u6bcf10s\u68c0\u6d4b\u4e00\u6b21\u662f\u5426\u6301\u6709\u9501)\n            redissonLock.lock();\n \n            \/\/------ \u6267\u884c\u4e1a\u52a1\u903b\u8f91 ----start------\n            int stock = Integer.valueOf(redisTemplate.opsForValue().get(\"stock\"));\n            if (stock &gt; 0) {\n                int newStock = stock - 1;\n                \/\/\u6267\u884c\u4e1a\u52a1\u64cd\u4f5c\u51cf\u5e93\u5b58\n                redisTemplate.opsForValue().set(\"stock\", newStock + \"\");\n                System.out.println(\"\u6263\u51cf\u5e93\u5b58\u6210\u529f, \u5269\u4f59\u5e93\u5b58:\" + newStock);\n            } else {\n                System.out.println(\"\u5e93\u5b58\u5df2\u7ecf\u4e3a0\uff0c\u4e0d\u80fd\u7ee7\u7eed\u6263\u51cf\");\n            }\n            \/\/------ \u6267\u884c\u4e1a\u52a1\u903b\u8f91 ----end------\n        } finally {\n            \/\/\u89e3\u9501\n            redissonLock.unlock();\n        }\n        return \"success\";\n    }\n}<\/pre>\n<p>\u5b9e\u73b0\u539f\u7406<\/p>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/img.picgo.net\/2024\/10\/16\/image8f04ccd8cb13300f.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/img.picgo.net\/2024\/10\/16\/image8f04ccd8cb13300f.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"image\" border=\"0\" \/><\/div><\/p>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/img.picgo.net\/2024\/10\/16\/image55875bea857547df.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/img.picgo.net\/2024\/10\/16\/image55875bea857547df.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"image\" border=\"0\" \/><\/div><\/p>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/img.picgo.net\/2024\/10\/16\/imageb10a2bb9cd04ff77.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/img.picgo.net\/2024\/10\/16\/imageb10a2bb9cd04ff77.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"image\" border=\"0\" \/><\/div><\/p>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n<h2>\u5206\u6bb5\u9501<\/h2>\n<p>\u600e\u4e48\u5728\u9ad8\u5e76\u53d1\u7684\u573a\u666f\u53bb\u5b9e\u73b0\u4e00\u4e2a\u9ad8\u6027\u80fd\u7684\u5206\u5e03\u5f0f\u9501\u5462\uff1f<\/p>\n<p>\u7535\u5546\u7f51\u7ad9\u5728\u5927\u4fc3\u7684\u65f6\u5019\u5e76\u53d1\u91cf\u5f88\u5927\uff1a<\/p>\n<p>\uff081\uff09\u82e5\u62a2\u8d2d\u4e0d\u662f\u540c\u4e00\u4e2a\u5546\u54c1\uff0c\u5219\u53ef\u4ee5\u589e\u52a0Redis\u96c6\u7fa4\u7684cluster\u6765\u5b9e\u73b0\uff0c\u56e0\u4e3a\u4e0d\u662f\u540c\u4e00\u4e2a\u5546\u54c1\uff0c\u6240\u4ee5\u901a\u8fc7\u8ba1\u7b97 key \u7684hash\u4f1a\u843d\u5230\u4e0d\u540c\u7684 cluster\u4e0a\uff1b<\/p>\n<p>\uff082\uff09\u82e5\u62a2\u8d2d\u7684\u662f\u540c\u4e00\u4e2a\u5546\u54c1\uff0c\u5219\u8ba1\u7b97key\u7684hash\u503c\u4f1a\u843d\u540c\u4e00\u4e2acluster\u4e0a\uff0c\u6240\u4ee5\u52a0\u673a\u5668\u4e5f\u662f\u6ca1\u6709\u7528\u7684\u3002<\/p>\n<p>\u9488\u5bf9\u7b2c\u4e8c\u4e2a\u95ee\u9898\uff0c\u53ef\u4ee5\u4f7f\u7528\u5e93\u5b58\u5206\u6bb5\u9501\u7684\u65b9\u5f0f\u53bb\u5b9e\u73b0\u3002<\/p>\n<p>\u5206\u6bb5\u9501<\/p>\n<p>\u5047\u5982\u4ea7\u54c11\u6709200\u4e2a\u5e93\u5b58\uff0c\u53ef\u4ee5\u5c06\u8fd9200\u4e2a\u5e93\u5b58\u5206\u4e3a10\u4e2a\u6bb5\u5b58\u50a8\uff08\u6bcf\u6bb520\u4e2a\uff09\uff0c\u6bcf\u6bb5\u5b58\u50a8\u5230\u4e00\u4e2acluster\u4e0a\uff1b\u5c06key\u4f7f\u7528hash\u8ba1\u7b97\uff0c\u4f7f\u8fd9\u4e9bkey\u6700\u540e\u843d\u5728\u4e0d\u540c\u7684cluster\u4e0a\u3002<\/p>\n<p>\u6bcf\u4e2a\u4e0b\u5355\u8bf7\u6c42\u9501\u4e86\u4e00\u4e2a\u5e93\u5b58\u5206\u6bb5\uff0c\u7136\u540e\u5728\u4e1a\u52a1\u903b\u8f91\u91cc\u9762\uff0c\u5c31\u5bf9\u6570\u636e\u5e93\u6216\u8005\u662fRedis\u4e2d\u7684\u90a3\u4e2a\u5206\u6bb5\u5e93\u5b58\u8fdb\u884c\u64cd\u4f5c\u5373\u53ef\uff0c\u5305\u62ec\u67e5\u5e93\u5b58 -&gt; \u5224\u65ad\u5e93\u5b58\u662f\u5426\u5145\u8db3 -&gt; \u6263\u51cf\u5e93\u5b58\u3002<\/p>\n<p>\u5177\u4f53\u53ef\u4ee5\u53c2\u7167 ConcurrentHashMap \u7684\u6e90\u7801\u53bb\u5b9e\u73b0\uff0c\u5b83\u4f7f\u7528\u7684\u5c31\u662f\u5206\u6bb5\u9501\u3002<\/p>\n<p>\u9ad8\u6027\u80fd\u5206\u5e03\u5f0f\u9501\u5177\u4f53\u53ef\u53c2\u8003\u94fe\u63a5\uff1a<a href=\"https:\/\/mp.weixin.qq.com\/s\/RLeujAj5rwZGNYMD0uLbrg\">\u6bcf\u79d2\u4e0a\u5343\u8ba2\u5355\u573a\u666f\u4e0b\u7684\u5206\u5e03\u5f0f\u9501\u9ad8\u5e76\u53d1\u4f18\u5316\u5b9e\u8df5\uff01\u3010\u77f3\u6749\u7684\u67b6\u6784\u7b14\u8bb0<\/a><\/p>\n<\/p>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/img.picgo.net\/2024\/10\/16\/image842980aad367142f.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/img.picgo.net\/2024\/10\/16\/image842980aad367142f.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"image\" border=\"0\" \/><\/div><\/p>\n<h2>\u603b\u7ed3<\/h2>\n<ul>\n<li>\u8ffd\u6c42\u6570\u636e\u53ef\u9760\u6027\/\u5f3a\u4e00\u81f4\u6027\uff1a\u4f7f\u7528Zookeeper<\/li>\n<li>\u8ffd\u6c42\u6027\u80fd\uff1a\u9009\u62e9Redis\uff0c\u63a8\u8350Redisson<\/li>\n<li>Redis\u5206\u5e03\u5f0f\u9501\u76ee\u524d\u6700\u5927\u95ee\u9898\u5728\u4e8e\uff1a\u4e3b\u4ece\u6a21\u5f0f\u4e0b\/\u96c6\u7fa4\u6a21\u5f0f\u4e0b\uff0cmaster\u8282\u70b9\u5b95\u673a\uff0c\u5f02\u6b65\u540c\u6b65\u6570\u636e\u5bfc\u81f4\u9501\u4e22\u5931\u95ee\u9898<\/li>\n<li>Redis\u7684RedLock\u7b97\u6cd5\u5177\u6709\u5f88\u5927\u4e89\u8bae\u6027\uff0c\u4e00\u822c\u4e0d\u63a8\u8350\u4f7f\u7528<\/li>\n<\/ul>\n<h2>python\u4ee3\u7801\u5b9e\u73b0(\u6458\u81eajiandanokok)<\/h2>\n<pre class=\"code\">import redis\nimport uuid\nimport time\n\n\nclass LockService:\n    \"\"\"\n    \u57fa\u4e8eRedis\u5b9e\u73b0\u7684\u5206\u5e03\u5f0f\u9501\n    \"\"\"\n    host = 'localhost'\n    port = 6379\n    password = ''\n    db = 1\n\n    def __init__(self, conn=None):\n        \"\"\"\n        \u5982\u679c\u4e0d\u4f20\u8fde\u63a5\u6c60\u7684\u8bdd\uff0c\u9ed8\u8ba4\u8bfb\u53d6\u914d\u7f6e\u7684Redis\u4f5c\u4e3a\u8fde\u63a5\u6c60\n        :param conn:\n        \"\"\"\n        self.conn = conn if conn else self.get_redis_client()\n\n    def get_redis_client(self):\n        \"\"\"\n        \u83b7\u53d6Redis\u8fde\u63a5\n        :return:\n        \"\"\"\n        return redis.Redis(\n            host=self.host,\n            port=self.port,\n            password=self.password,\n            db=self.db\n        )\n\n    def acquire_lock(self, lock_name, acquire_timeout=10, expire_time=30):\n        \"\"\"\n        \u52a0\u9501\/\u83b7\u53d6\u9501\n\n        \u5982\u679c\u4e0d\u5b58\u5728lock_name\uff0c\u5219\u52a0\u9501\uff0c\u5e76\u4e14\u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4\uff0c\u907f\u514d\u6b7b\u9501\n        \u5982\u679c\u5b58\u5728lock_name\uff0c\u5219\u5237\u65b0\u8fc7\u671f\u65f6\u95f4\n\n        :param lock_name:       \u9501\u7684\u540d\u79f0\n        :param acquire_timeout: \u52a0\u9501\/\u83b7\u53d6\u9501\u7684\u8d85\u65f6\u65f6\u95f4\uff0c\u9ed8\u8ba410\u79d2\n        :param expire_time:     \u9501\u7684\u8d85\u65f6\u65f6\u95f4\uff0c\u9ed8\u8ba430\u79d2\n        :return:\n        \"\"\"\n        lockname = f'lock:{lock_name}'\n        value = str(uuid.uuid4())\n        end_time = time.time() + acquire_timeout\n        while time.time() &lt; end_time:\n            # \u5982\u679c\u4e0d\u5b58\u5728\u8fd9\u4e2a\u9501\u5219\u52a0\u9501\u5e76\u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4\uff0c\u907f\u514d\u6b7b\u9501\n            if self.conn.set(lockname, value, ex=expire_time, nx=True):\n                return value\n            time.sleep(0.1)\n        return False\n\n    def release_lock(self, lock_name, value):\n        \"\"\"\n        \u91ca\u653e\u9501\n\n        :param lock_name: \u9501\u7684\u540d\u79f0\n        :param value:     \u9501\u7684\u503c\n        :return:\n        \"\"\"\n        unlock_script = \"\"\"\n        if redis.call(\"get\",KEYS[1]) == ARGV[1] then\n            return redis.call(\"del\",KEYS[1])\n        else\n            return 0\n        end\n        \"\"\"\n        lockname = f'lock:{lock_name}'\n        unlock = self.conn.register_script(unlock_script)\n        result = unlock(keys=[lockname], args=[value])\n        if result:\n            return True\n        else:\n            return False\n\u00a0<\/pre>\n<\/p>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n<h2>Redission\u5206\u5e03\u5f0f\u9501\u5b9e\u73b0\u539f\u7406<\/h2>\n<h3>\u53ef\u91cd\u5165\u9501\u539f\u7406<\/h3>\n<p>\u901a\u8fc7value\u503c\u8bb0\u5f55\u91cd\u5165\u6b21\u6570\uff0c\u5f53\u91cd\u65b0\u83b7\u53d6\u9501\u65f6\uff0cvalue+1\uff0c\u91ca\u653e\u9501\u7684\u65f6\u5019\u53ea\u6709\u5f53value\u503c\u4e3a0\u624d\u771f\u6b63\u91ca\u653e\u9501<\/p>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/img.picgo.net\/2024\/10\/21\/imagebb6b51a6640a6a3b.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/img.picgo.net\/2024\/10\/21\/imagebb6b51a6640a6a3b.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"image\" border=\"0\" \/><\/div><\/p>\n<h3>\u53ef\u91cd\u8bd5\u539f\u7406<\/h3>\n<p>redission\u83b7\u53d6\u9501\u65f6\uff0c\u4f1a\u8bbe\u7f6e\u4e00\u4e2a\u7b49\u5f85\u65f6\u95f4\uff0c\u5728\u7b49\u5f85\u65f6\u95f4\u5185\uff0c\u6211\u4eec\u5c1d\u8bd5\u83b7\u53d6\u9501\uff0c<\/p>\n<p>\u7b2c\u4e00\u6b21\u83b7\u53d6\u9501\uff0c\u5982\u679c\u80fd\u591f\u62ff\u5230\uff0c\u90a3\u76f4\u63a5\u7ed3\u675f\uff0c\u5982\u679c\u62ff\u4e0d\u5230\uff0c\u5c31\u8981\u770b\u5c1d\u8bd5\u4e86\u83b7\u53d6\u9501\u4e86\u8fd9\u4e48\u957f\u65f6\u95f4\uff0c\u6211\u4eec\u80fd\u591f\u63a5\u6536\u7684\u7b49\u5f85\u65f6\u95f4\u8fd8\u6709\u6ca1\u6709\u4e86\uff1f\u5982\u679c\u8fd8\u6709\uff0c\u6211\u4eec\u5c31\u5c1d\u8bd5\u8ba2\u9605\u8fd9\u4e2a\u9501\u7684\u91ca\u653e\u6d88\u606f\uff0c\u7136\u540e\u4e00\u76f4\u7b49\u5f85\u5230\u8fbe\u5230\u6211\u4eec\u7684\u5fcd\u8010\u9650\u5ea6\uff0c\u5373\u6211\u4eec\u6700\u957f\u80fd\u7b49\u7684\u65f6\u95f4\uff0c\u5982\u679c\u4e00\u76f4\u6ca1\u6536\u5230\u6d88\u606f\uff0c\u90a3\u5c31\u83b7\u53d6\u9501\u5931\u8d25\uff0c\u5982\u679c\u6536\u5230\u4e86\uff0c\u6211\u4eec\u5c31\u518d\u6b21\u5c1d\u8bd5\u83b7\u53d6\u9501<\/p>\n<h3>\u770b\u95e8\u72d7\u673a\u5236<\/h3>\n<p>\u5728\u83b7\u53d6\u9501\u6210\u529f\u4e4b\u540e\uff0c\u5c31\u4f1a\u8c03\u7528 scheduleExpirationRenewal(threadId) \u65b9\u6cd5\u5f00\u542f\u81ea\u52a8\u7eed\u7ea6\uff0c\u5177\u4f53\u662f\u7531\u5728 map \u4e2d\u6dfb\u52a0\u4e1a\u52a1\u540d\u79f0\u548c\u4efb\u52a1\u5b9a\u65f6\u5668\uff0c\u8fd9\u4e2a\u5b9a\u65f6\u5668\u4f1a\u5728\u4e00\u5b9a\u65f6\u95f4\u5185\u6267\u884c\uff0c\u6bd4\u5982\u8bf4 10 \u79d2\u5c31\u4f1a\u81ea\u52a8\u5f00\u542f\u4efb\u52a1\uff0c\u800c\u8be5\u5b9a\u65f6\u5668\u4e2d\u7684\u4efb\u52a1\u5c31\u662f\u4e0d\u65ad\u7684\u91cd\u7f6e\u9501\u7684\u6700\u5927\u8d85\u65f6\u65f6\u95f4\uff0c\u4f7f\u7528\u9012\u5f52\uff0c\u4e0d\u65ad\u7684\u8c03\u7528\u91cd\u7f6e\u9501\u7684\u65f6\u95f4\uff0c\u8fd9\u5c31\u4fdd\u8bc1\u4e86\u9501\u662f\u6c38\u4e45\u88ab\u5f53\u524d\u7ebf\u7a0b\u6301\u6709\u3002<\/p>\n<p>\u8fd9\u6837\u5c31\u53ef\u4ee5\u4fdd\u8bc1\u6267\u884c\u4e1a\u52a1\u4e4b\u540e\uff0c\u624d\u4f1a\u91ca\u653e\u9501\u3002\u91ca\u653e\u9501\u4e4b\u540e\uff0c\u4f1a\u53d6\u6d88\u5b9a\u65f6\u4efb\u52a1\u3002<\/p>\n<p>\u00a0<\/p>\n<h3>Redission MultiLock\u89e3\u51b3\u4e3b\u4ece\u4e00\u81f4\u95ee\u9898<\/h3>\n<p>\u5148\u641e\u6e05\u695a\u4ec0\u4e48\u662f\u4e3b\u4ece\u4e00\u81f4\u6027\u95ee\u9898\uff0c\u5728\u96c6\u7fa4\u7684 Redis \u4e2d\u4f1a\u533a\u5206\u51fa\u4e3b\u529b\u673a\u548c\u4e00\u822c\u673a\u5668\uff0c\u5728\u5199 Redis \u547d\u4ee4\u4f1a\u653e\u5230\u4e3b\u529b\u673a\u4e2d\u8fd0\u884c\uff0c\u800c\u4e3b\u529b\u673a\u548c\u4e00\u822c\u673a\u5668\u9700\u8981\u4fdd\u8bc1\u6570\u636e\u90fd\u662f\u4e00\u6837\u7684\uff0c\u4e5f\u5c31\u662f\u4e3b\u4ece\u540c\u6b65\u6570\u636e\uff0c\u5728\u4e3b\u529b\u673a\u4e2d\u6267\u884c\u5199\u547d\u4ee4\u65f6\uff0c\u7a81\u7136\u53d1\u751f\u5b95\u673a\uff0c\u672a\u6765\u5f97\u53ca\u5c06\u6570\u636e\u540c\u6b65\u5230\u5176\u4ed6\u4e00\u822c\u673a\u5668\u4e2d\uff0c\u800c\u4e14\u5f53\u4e3b\u529b\u673a\u5b95\u673a\u4e4b\u540e\uff0c\u4f1a\u9009\u51fa\u4e00\u53f0\u4e00\u822c\u673a\u5668\u5145\u5f53\u4e3b\u529b\u673a\uff0c\u8fd9\u65f6\u5019\u7684\u4e3b\u529b\u673a\u6ca1\u6709\u540c\u6b65\u4e4b\u524d\u7684\u6570\u636e\uff0c\u90a3\u4e48\u5176\u4ed6\u7ebf\u7a0b\u518d\u6765\u5199\u547d\u540d\u7684\u65f6\u5019\u5c31\u4f1a\u51fa\u73b0\u95ee\u9898\u4e86\uff0c\u8fd9\u51fa\u73b0\u4e86\u4e3b\u4ece\u4e0d\u4e00\u81f4\u6027\u3002<\/p>\n<p>\u5728\u591a\u4e3b\u67b6\u6784\u4e2d\uff0c\u6bcf\u53f0\u4e3b\u673a\u90fd\u53ef\u4ee5\u63a5\u6536\u5199\u8bf7\u6c42\uff0c\u8fd9\u6837\u5373\u4f7f\u67d0\u4e00\u53f0\u4e3b\u673a\u5b95\u673a\uff0c\u5176\u4ed6\u4e3b\u673a\u4ecd\u7136\u53ef\u4ee5\u7ee7\u7eed\u5904\u7406\u5199\u8bf7\u6c42\u3002<\/p>\n<p>\u5f53\u67d0\u4e00\u53f0\u4e3b\u673a\u5b95\u673a\u540e\uff0c\u5982\u679c\u5728\u5b83\u6062\u590d\u4e4b\u524d\u6709\u65b0\u7684\u5199\u64cd\u4f5c\u53d1\u751f\uff0c\u53ef\u80fd\u4f1a\u5bfc\u81f4\u6570\u636e\u4e0d\u4e00\u81f4\u3002\u901a\u8fc7\u6bd4\u8f83\u4e0d\u540c\u4e3b\u673a\u7684\u6570\u636e\u72b6\u6001\uff0c\u53ef\u4ee5\u5f88\u5bb9\u6613\u5730\u53d1\u73b0\u8fd9\u4e9b\u4e0d\u4e00\u81f4\u7684\u95ee\u9898\u3002<\/p>\n<p>\u5f53\u5b95\u673a\u7684\u4e3b\u673a\u6062\u590d\u540e\uff0c\u53ef\u4ee5\u901a\u8fc7\u4e0e\u5176\u4ed6\u4e3b\u673a\u7684\u6570\u636e\u8fdb\u884c\u6bd4\u8f83\uff0c\u627e\u51fa\u5dee\u5f02\u5e76\u8fdb\u884c\u6570\u636e\u540c\u6b65\uff0c\u786e\u4fdd\u6240\u6709\u4e3b\u673a\u7684\u6570\u636e\u4e00\u81f4\u3002<\/p>\n<p>\u7b80\u5355\u6765\u8bf4\uff0c\u8bbe\u7f6e\u591a\u53f0\u4e3b\u529b\u673a\uff0c\u6bcf\u4e00\u6b21\u5199\u547d\u4ee4\u90fd\u662f\u4e00\u5f0f\u591a\u4efd\uff0c\u5f53\u67d0\u4e00\u53f0\u4e3b\u529b\u673a\u51fa\u73b0\u5b95\u673a\u4e86\uff0c\u4e3b\u4ece\u672a\u6765\u5f97\u53ca\u540c\u6b65\u65f6\uff0c\u518d\u5199\u547d\u4ee4\uff0c\u540c\u6837\u4e00\u5f0f\u591a\u4efd\uff0c\u8fd9\u6837\u5145\u5f53\u4e3b\u529b\u673a\u51fa\u73b0\u4e86\u8ddf\u5176\u4ed6\u4e3b\u529b\u673a\u4e0d\u540c\u7684\u7ed3\u679c\u65f6\uff0c\u5c31\u5f88\u5bb9\u6613\u7684\u53d1\u73b0\u95ee\u9898\u4e86\u3002<\/p>\n<p>\u901a\u8fc7\u8bbe\u7f6e\u591a\u53f0\u4e3b\u529b\u673a\u5e76\u8fdb\u884c\u5199\u64cd\u4f5c\u7684\u591a\u4efd\u590d\u5236\uff0c\u53ef\u4ee5\u6709\u6548\u63d0\u9ad8\u7cfb\u7edf\u7684\u53ef\u9760\u6027\uff0c\u5e76\u5728\u51fa\u73b0\u95ee\u9898\u65f6\u5feb\u901f\u53d1\u73b0\u548c\u89e3\u51b3\u6570\u636e\u4e0d\u4e00\u81f4\u7684\u95ee\u9898\u3002<\/p>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/img.picgo.net\/2024\/10\/21\/imageac3eab4d5fb1ebbf.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/img.picgo.net\/2024\/10\/21\/imageac3eab4d5fb1ebbf.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"image\" border=\"0\" \/><\/div><\/p>","protected":false},"excerpt":{"rendered":"<p>\u6982\u8ff0 \u5206\u5e03\u5f0f\u9501\u7684CAP\u7406\u8bba \u5728\u4e00\u4e2a\u5206\u5e03\u5f0f\u7cfb\u7edf\uff0c\u6700\u591a\u53ea\u80fd\u6ee1\u8db3\u4e00\u4e0b\u4e09\u9879\u4e2d\u7684\u4e24\u9879 \u4e00\u81f4\u6027\uff08Consistency\uff09\uff1a 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