{"id":483,"date":"2024-09-03T00:00:25","date_gmt":"2024-09-02T16:00:25","guid":{"rendered":"https:\/\/forelink.top\/?p=483"},"modified":"2024-09-03T00:00:26","modified_gmt":"2024-09-02T16:00:26","slug":"%e5%88%86%e5%b8%83%e5%bc%8f%e9%94%81","status":"publish","type":"post","link":"https:\/\/forelink.top\/index.php\/2024\/09\/03\/%e5%88%86%e5%b8%83%e5%bc%8f%e9%94%81\/","title":{"rendered":"\u5206\u5e03\u5f0f\u9501"},"content":{"rendered":"\n

\u7b80\u4ecb\uff1a<\/h2>\n\n\n\n

\u5206\u5e03\u5f0f\u96c6\u7fa4\u7cfb\u7edf\u6f14\u5316\u7684\u7ed3\u679c\uff0c\u662f\u591a\u7ebf\u7a0b\u591a\u8fdb\u7a0b\u7684\u5206\u5e03\u5728\u4e0d\u540c\u4e3b\u673a\u3002\u5bfc\u81f4\u539f\u5355\u673a\u90e8\u7f72\u60c5\u51b5\u4e0b\u7684\u5e76\u53d1\u63a7\u5236\u9501\u7b56\u7565\u5931\u6548\u3002<\/p>\n\n\n\n

\u5927\u90e8\u5206Web\u5e94\u7528\u90fd\u662f\u4f9d\u8d56\u4e8eJava\u7684\u5f00\u53d1\u6846\u67b6\uff0c\u800c Java \u5e76\u6ca1\u6709\u63d0\u4f9b\u5206\u5e03\u5f0f\u9501\u7684\u652f\u6301\u3002\n\u4e3a\u4e86\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff0c\u9700\u8981\u9009\u62e9\u4e00\u79cd\u8de8JVM\u7684\u4e92\u65a5\u673a\u5236\u6765\u63a7\u5236\u5171\u4eab\u8d44\u6e90\u7684\u8bbf\u95ee\u3002<\/p>\n\n\n\n

\u5206\u5e03\u5f0f\u9501\u4e0e\u5b83\u7684\u4e0d\u540c\u65b9\u6848\uff0c\u5c31\u662f\u8981\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\u3002<\/p>\n\n\n\n

\u76ee\u524d\u7684\u4e3b\u6d41\u65b9\u6848\u6709\uff1a\n1\u3001\u57fa\u4e8e\u6570\u636e\u5e93\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\n2\u3001\u57fa\u4e8e\u7f13\u5b58\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\n3\u3001\u57fa\u4e8eZookeeper\n\n\u8ffd\u6c42\u6027\u80fd\uff0c\u57fa\u4e8e\u7f13\u5b58\u5b9e\u73b0\u7684\u5206\u5e03\u5f0f\u9501\u6700\u597d\n\u5e0c\u671b\u53ef\u9760\u6027\uff0c\u9009\u62e9Zookeeper\u66f4\u80dc\u4e00\u7b79\n<\/code><\/pre>\n\n\n\n
\u4f7f\u7528redis\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501<\/h2>\n\n\n\n
setnx \u5c31\u662fredis\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u7684\u547d\u4ee4<\/p>\n\n\n\n
setnx lock 1\n-->(integer) 1\nsetnx lock 1\n-->(integer) 0\n<\/code><\/pre>\n\n\n\n
\u8bbe\u7f6e\u4e86lock\u4e4b\u540e\uff0c\u7ee7\u7eed\u8bbf\u95ee\u9501\u7684\u64cd\u4f5c\u3002<\/p>\n\n\n\n
\u5982\u679c\u9501\u5728\uff0c\u4f1a\u7b49\u5f85\u91cd\u8bd5\u3002\u9501\u4e0d\u5728\u65f6\uff0c\u624d\u4f1a\u653e\u884c\u5176\u4ed6\u8bf7\u6c42\u3002\n\u53ea\u6709\u628a\u9501\u89e3\u5f00\u540e\uff08del lock\uff09\uff0c\u624d\u80fd\u7ee7\u7eed\u5176\u4ed6\u64cd\u4f5c\u3002<\/p>\n\n\n\n
\u6b7b\u9501\u95ee\u9898\uff1a<\/h3>\n\n\n\n
\u9501\u91ca\u653e\u4f1a\u51fa\u73b0\u6b7b\u9501\u95ee\u9898\u3002\n\u81ea\u52a8\u5316\u89e3\u51b3\u6b7b\u9501\u95ee\u9898\uff0c\u53ef\u4ee5\u6839\u636e\u5177\u4f53\u4e1a\u52a1\uff0c\u7ed9\u9501\u8bbe\u5b9a\u4e00\u4e2a\u5408\u7406\u7684\u8fc7\u671f\u65f6\u95f4\uff1a<\/p>\n\n\n\n
setnx lock 1 \/\/\u8bbe\u7f6e\u9501\nexpire lock 10 \/\/ 10\u79d2\u540e\u9501\u8fc7\u671f\n<\/code><\/pre>\n\n\n\n
\u8003\u8651\u5230\u4e0a\u9501\u64cd\u4f5c\u539f\u5b50\u6027\u7684\u5fc5\u8981\u6027\uff0c\u5e94\u8be5\u5c06\u8bbe\u7f6e\u9501\u548c\u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4\u5728\u4e00\u6761\u6307\u4ee4\u4e2d\u6267\u884c<\/p>\n\n\n\n
set lock 1 nx ex 10 \/\/ nx\u4e0a\u9501 ex\u8fc7\u671f\u65f6\u95f4\n<\/code><\/pre>\n\n\n\n
\u5b9e\u4f8b\u4ee3\u7801\uff1a<\/h3>\n\n\n\n
public void testLock(){\n    \/\/ 1 \u83b7\u53d6\u9501 3\u79d2\u540e\u8fc7\u671f\n    Boolean lock = redisTemplage.opsForValue().setIfAbsent(\"lock\",\"1\",3,TimeUnit.SECONDS);\n    \/\/ 2 \u83b7\u53d6\u9501\u6210\u529f\u3001\u67e5\u8be2num\u7684\u503c\n    if(lock){\n        Object value = redisTemplate.opsForValue().get(\"num\");\n        \/\/ \u5224\u65adnum\u4e3a\u7a7areturn\n        if(StringUtils.isEmpty(value))\n            return;\n        \/\/\u5c06redis\u7684num\u52a0\u4e00(\u4e1a\u52a1\u64cd\u4f5c\uff09\uff0c\u5e76\u624b\u52a8\u91ca\u653e\u9501\n        redisTemplate.opsForValue().set(\"num\",++num);\n        redisTemplate.delete(\"lock\");\n    }else{\n        \/\/ \u83b7\u53d6\u9501\u5931\u8d25\uff0c0.1s\u540e\u518d\u83b7\u53d6\n        try{\n            Thread.sleep(100);\n             testLock();\n        }catch(...)...\n    }\n}\n<\/code><\/pre>\n\n\n\n
\u4f7f\u7528UUID\uff0c\u7ed9\u9501\u552f\u4e00\u7684\u6807\u8bc6\uff1a<\/h3>\n\n\n\n
X\u8bbe\u7f6e\u9501\u540e\uff0c\u5728\u624b\u52a8\u91ca\u653e\u524d\u5b95\u673a\u3002Y\u6b64\u65f6\u5728X\u8bbe\u7f6e\u7684\u9501\u81ea\u52a8\u91ca\u653e\u540e\uff0c\u4e0a\u4e86\u9501\u3002\nX\u5728\u529f\u80fd\u6062\u590d\u540e\uff0c\u4f1a\u5c06Y\u8bbe\u7f6e\u7684\u9501\u91ca\u653e\u3002<\/p>\n\n\n\n
\u4e3a\u4e86\u907f\u514d\u8fd9\u4e2a\u95ee\u9898\u7684\u51fa\u73b0\uff0c\u5e94\u8be5\u7ed9\u9501\u52a0uuid\u3002<\/p>\n\n\n\n
String uuid = new UUID.RandomUUID().toString();\nBoolean lock = redisTemplage.opsForValue().setIfAbsent(\"lock\",uuid,3,TimeUnit.SECONDS);\nif(get(lock)==uuid)\nredisTemplate.delete(\"lock\");\nelse{\n    ~~~\n}\n<\/code><\/pre>\n\n\n\n
\u4f46\u5220\u9664\u64cd\u4f5c\u7f3a\u5c11\u539f\u5b50\u6027\n\u5728\u5220\u9664\u65f6\uff0c\u9501\u8fc7\u671f\u81ea\u52a8\u91ca\u653e\u3002\u6b64\u65f6\u4e0a\u9501\u540e\uff0c\u9501\u4f1a\u88ab\u524d\u7f6e\u7684\u5220\u9664\u64cd\u4f5c\u5220\u9664\u3002<\/p>\n\n\n\n
\uff08\u5171\u4eab\u9501\u7684\u95ee\u9898\uff09<\/p>\n\n\n\n
LUA\u811a\u672c\uff1a<\/h3>\n\n\n\n
\u5f31\u811a\u672c\u5728\u6267\u884c\u65f6\uff0c\u5176\u4ed6\u6307\u4ee4\u4f1a\u7b49\u5f85\u3002<\/p>\n\n\n\n
\u6240\u4ee5\u7528LUA\u811a\u672c\u53ef\u4ee5\u4fdd\u8bc1\u5220\u9664\u64cd\u4f5c\u7684\u539f\u5b50\u6027\u3002<\/p>\n\n\n\n
\u5206\u5e03\u5f0f\u9501\u9700\u8981\u6ee1\u8db3<\/h2>\n\n\n\n
-\u4e92\u65a5\u6027\u3002\u5728\u4efb\u610f\u65f6\u523b\uff0c\u53ea\u6709\u4e00\u4e2a\u5ba2\u6237\u7aef\u80fd\u6301\u6709\u9501\u3002<\/p>\n\n\n\n
-\u4e0d\u4f1a\u53d1\u751f\u6b7b\u9501\u3002<\/p>\n\n\n\n
-\u52a0\u9501\u548c\u89e3\u9501\u8fc7\u7a0b\u5fc5\u987b\u6709\u539f\u5b50\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u7b80\u4ecb\uff1a \u5206\u5e03\u5f0f\u96c6\u7fa4\u7cfb\u7edf\u6f14\u5316\u7684\u7ed3\u679c\uff0c\u662f\u591a\u7ebf\u7a0b\u591a\u8fdb\u7a0b\u7684\u5206\u5e03\u5728\u4e0d\u540c\u4e3b\u673a\u3002\u5bfc\u81f4\u539f\u5355\u673a\u90e8\u7f72\u60c5\u51b5\u4e0b\u7684\u5e76\u53d1\u63a7\u5236\u9501\u7b56\u7565\u5931\u6548\u3002  […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[40,39],"tags":[],"class_list":["post-483","post","type-post","status-publish","format-standard","hentry","category-redis","category-39"],"_links":{"self":[{"href":"https:\/\/forelink.top\/index.php\/wp-json\/wp\/v2\/posts\/483","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/forelink.top\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/forelink.top\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/forelink.top\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/forelink.top\/index.php\/wp-json\/wp\/v2\/comments?post=483"}],"version-history":[{"count":1,"href":"https:\/\/forelink.top\/index.php\/wp-json\/wp\/v2\/posts\/483\/revisions"}],"predecessor-version":[{"id":484,"href":"https:\/\/forelink.top\/index.php\/wp-json\/wp\/v2\/posts\/483\/revisions\/484"}],"wp:attachment":[{"href":"https:\/\/forelink.top\/index.php\/wp-json\/wp\/v2\/media?parent=483"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/forelink.top\/index.php\/wp-json\/wp\/v2\/categories?post=483"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/forelink.top\/index.php\/wp-json\/wp\/v2\/tags?post=483"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}