{"id":10008128,"date":"2023-08-21T21:00:46","date_gmt":"2023-08-21T13:00:46","guid":{"rendered":"https:\/\/blog.itmax.cn\/?p=10008128"},"modified":"2023-08-21T21:00:46","modified_gmt":"2023-08-21T13:00:46","slug":"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8redis%e5%ae%9e%e7%8e%b0%e5%88%86%e5%b8%83%e5%bc%8f%e9%94%81%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/itmax.cn\/?p=10008128","title":{"rendered":"\u5982\u4f55\u4f7f\u7528Redis\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\uff1f"},"content":{"rendered":"<p>\u9996\u5148\u6765\u8bf4 Redis \u4f5c\u4e3a\u4e00\u4e2a\u72ec\u7acb\u7684\u4e09\u65b9\u7cfb\u7edf\uff0c\u5176\u5929\u751f\u7684\u4f18\u52bf\u5c31\u662f\u53ef\u4ee5\u4f5c\u4e3a\u4e00\u4e2a\u5206\u5e03\u5f0f\u7cfb\u7edf\u6765\u4f7f\u7528\uff0c\u56e0\u6b64\u4f7f\u7528 Redis \u5b9e\u73b0\u7684\u9501\u90fd\u662f\u5206\u5e03\u5f0f\u9501\uff0c\u7406\u89e3\u4e86\u8fd9\u4e2a\u6982\u5ff5\u624d\u80fd\u770b\u61c2\u672c\u6587\u6240\u8bf4\u7684\u5185\u5bb9\u3002<\/p>\n<p>\u5206\u5e03\u5f0f\u9501\u7684\u793a\u610f\u56fe\uff0c\u5982\u4e0b\u6240\u793a\uff1a<br \/><img decoding=\"async\"   referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000044135223\" alt=\"image.png\" title=\"image.png\"><\/p>\n<h2>\u5206\u5e03\u5f0f\u9501\u5b9e\u73b0<\/h2>\n<p>\u4f7f\u7528 Redis \u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\uff0c\u53ef\u4ee5<strong>\u901a\u8fc7 setnx\uff08set if not exists\uff09\u547d\u4ee4\u5b9e\u73b0<\/strong>\uff0c\u5f53\u6211\u4eec\u4f7f\u7528 setnx \u521b\u5efa\u952e\u503c\u6210\u529f\u65f6\uff0c\u5219\u8868\u660e\u52a0\u9501\u6210\u529f\uff0c\u5426\u5219\u65e2\u4ee3\u7801\u52a0\u9501\u5931\u8d25\u3002\u56e0\u4e3a Redis \u4e3b\u7ebf\u7a0b\u662f\u5355\u7ebf\u7a0b\u8fd0\u884c\u7684\uff0c\u6240\u4ee5\u4e5f\u4e0d\u4f1a\u6709\u540c\u65f6\u52a0\u9501\u6210\u529f\u7684\u60c5\u51b5\u3002<br \/>\u5b9e\u73b0\u547d\u4ee4\u5982\u4e0b\uff1a<\/p>\n<pre><code class=\"powershell\">127.0.0.1:6379&gt; setnx lock true\n(integer) 1 #\u521b\u5efa\u9501\u6210\u529f\n#\u903b\u8f91\u4e1a\u52a1\u5904\u7406...\n127.0.0.1:6379&gt; del lock\n(integer) 1 #\u91ca\u653e\u9501<\/code><\/pre>\n<p>\u5f53\u6211\u4eec\u91cd\u590d\u52a0\u9501\u65f6\u6267\u884c\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n<pre><code class=\"powershell\">127.0.0.1:6379&gt; setnx lock true # \u7b2c\u4e00\u6b21\u52a0\u9501\n(integer) 1\n127.0.0.1:6379&gt; setnx lock true # \u7b2c\u4e8c\u6b21\u52a0\u9501\n(integer) 0<\/code><\/pre>\n<p>\u4ece\u4e0a\u8ff0\u547d\u4ee4\u4e2d\u53ef\u4ee5\u770b\u51fa\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u6267\u884c\u7684\u7ed3\u679c\u662f\u5426\u4e3a 1 \u6765\u5224\u65ad\u52a0\u9501\u662f\u5426\u6210\u529f\u3002<\/p>\n<h2>\u5206\u5e03\u9501\u95ee\u9898<\/h2>\n<p>\u7136\u800c\uff0c\u4f7f\u7528 setnx \u5b9e\u73b0\u5206\u5e03\u9501\u6709\u4e00\u4e2a\u3010<strong>\u6b7b\u9501\u95ee\u9898<\/strong>\u3011\uff0c\u5c31\u662f\u5f53\u52a0\u9501\u7684\u7ebf\u7a0b\uff08\u6216\u5e94\u7528\uff09\u6389\u7535\u6216\u5d29\u6e83\u4e4b\u540e\uff0c\u5176\u4ed6\u7ebf\u7a0b\u53ea\u80fd\u65e0\u9650\u7b49\u5f85\u4e0b\u53bb\u7684\u95ee\u9898\u3002<\/p>\n<p>\u6b64\u65f6\uff0c\u6211\u4eec<strong>\u89e3\u51b3\u6b7b\u9501\u95ee\u9898\u53ef\u4ee5\u901a\u8fc7\u6dfb\u52a0\u8bbe\u7f6e\u9501\u7684\u8fc7\u671f\u65f6\u95f4\u6765\u5b9e\u73b0<\/strong>\u3002<br \/>\u4e5f\u5c31\u662f setnx \u548c expire \u914d\u5408\u4f7f\u7528\uff0c\u5728 Redis 2.6.12 \u7248\u672c\u4e4b\u540e\uff0c\u65b0\u589e\u4e86\u4e00\u4e2a\u5f3a\u5927\u7684\u529f\u80fd\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4e00\u4e2a\u539f\u5b50\u64cd\u4f5c\u4e5f\u5c31\u662f\u4e00\u6761\u547d\u4ee4\u6765\u6267\u884c setnx \u548c expire \u64cd\u4f5c\u4e86\uff0c\u5b9e\u73b0\u547d\u4ee4\u5982\u4e0b\uff1a<\/p>\n<pre><code class=\"powershell\">127.0.0.1:6379&gt; set lock true ex 30 nx\nOK #\u521b\u5efa\u9501\u6210\u529f\n127.0.0.1:6379&gt; set lock true ex 30 nx\n(nil) #\u5728\u9501\u88ab\u5360\u7528\u7684\u65f6\u5019\uff0c\u4f01\u56fe\u83b7\u53d6\u9501\u5931\u8d25<\/code><\/pre>\n<p>\u5176\u4e2d ex \u4e3a\u8bbe\u7f6e\u8d85\u65f6\u65f6\u95f4\uff0c nx \u4e3a\u5143\u7d20\u975e\u7a7a\u5224\u65ad\uff0c\u7528\u6765\u5224\u65ad\u662f\u5426\u80fd\u6b63\u5e38\u4f7f\u7528\u9501\u7684\u3002<\/p>\n<h2>\u5c0f\u7ed3<\/h2>\n<p>Redis \u4f5c\u4e3a\u4e00\u4e2a\u72ec\u7acb\u7684\u4e09\u65b9\u7cfb\u7edf\uff0c\u5176\u4f18\u52bf\u662f\u5929\u751f\u53ef\u4ee5\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u3002\u5b83\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u662f\u901a\u8fc7 setnx \u6765\u5b9e\u73b0\u7684\uff0c\u7136\u800c\u53ea\u6709 nx\uff08not exists\uff09\u53ef\u80fd\u4f1a\u53d1\u751f\u6b7b\u9501\u7684\u95ee\u9898\uff0c\u6240\u4ee5\u6211\u4eec\u6700\u7ec8\u5b9e\u73b0\u6b7b\u9501\u5e94\u8be5\u4f7f\u7528 set nx ex \u7684\u65b9\u5f0f\u6765\u5b9e\u73b0\u3002<\/p>\n<blockquote><p>\u5c0f\u601d\u8003\uff1a\u5f53\u8bbe\u7f6e\u4e86\u8fc7\u671f\u65f6\u95f4\u4e4b\u540e\uff0cRedis \u5b9e\u73b0\u5206\u5e03\u5f0f\u4f9d\u7136\u4f1a\u6709\u4e00\u4e2a\u5c0f\u5c0f\u7684\u95ee\u9898\uff0c\u6709\u4eba\u77e5\u9053\u8fd9\u4e2a\u95ee\u9898\u548c\u89e3\u51b3\u65b9\u6848\u5417\uff1f\u6b22\u8fce\u8bc4\u8bba\u533a\u5199\u51fa\u4f60\u7684\u7b54\u6848\u3002<br \/>\u6b64\u6587\u7ae0\u70b9\u8d5e\u8fc7 100\uff0c\u6211\u4f1a\u7ed9\u51fa\u6807\u51c6\u7b54\u6848\u3002<\/p><\/blockquote>\n<blockquote><p>\u672c\u6587\u5df2\u6536\u5f55\u5230\u6211\u7684\u9762\u8bd5\u5c0f\u7ad9 <a target=\"_blank\" href=\"https:\/\/link.segmentfault.com\/?enc=rtO6dUXbi93FMeYLaYI%2FzA%3D%3D.5J77u%2FSQl9uXKTZlq2jLKJEFVFg%2FQKlCFWJ0v91lFLs%3D\" rel=\"noopener noreferrer\">www.javacn.site<\/a>\uff0c\u5176\u4e2d\u5305\u542b\u7684\u5185\u5bb9\u6709\uff1aRedis\u3001JVM\u3001\u5e76\u53d1\u3001\u5e76\u53d1\u3001MySQL\u3001Spring\u3001Spring MVC\u3001Spring Boot\u3001Spring Cloud\u3001MyBatis\u3001\u8bbe\u8ba1\u6a21\u5f0f\u3001\u6d88\u606f\u961f\u5217\u7b49\u6a21\u5757\u3002<\/p><\/blockquote>\n<p><a href=\"https:\/\/segmentfault.com\/a\/1190000044135221\">https:\/\/segmentfault.com\/a\/1190000044135221<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u9996\u5148\u6765\u8bf4 Redis \u4f5c\u4e3a\u4e00\u4e2a\u72ec\u7acb\u7684\u4e09\u65b9\u7cfb\u7edf\uff0c\u5176\u5929\u751f\u7684\u4f18\u52bf\u5c31\u662f\u53ef\u4ee5\u4f5c\u4e3a\u4e00\u4e2a\u5206\u5e03\u5f0f\u7cfb\u7edf\u6765\u4f7f\u7528\uff0c\u56e0\u6b64\u4f7f\u7528 Redi [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[4],"tags":[],"class_list":["post-10008128","post","type-post","status-publish","format-standard","hentry","category-share"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10008128","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=10008128"}],"version-history":[{"count":0,"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10008128\/revisions"}],"wp:attachment":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=10008128"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=10008128"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=10008128"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}