{"id":201593,"date":"2025-05-10T10:19:31","date_gmt":"2025-05-10T02:19:31","guid":{"rendered":"https:\/\/server.hk\/cnblog\/201593\/"},"modified":"2025-05-10T10:19:31","modified_gmt":"2025-05-10T02:19:31","slug":"redis-setifabsent%e8%bf%94%e5%9b%9enull%e7%9a%84%e9%97%ae%e9%a2%98%e5%8f%8a%e8%a7%a3%e5%86%b3","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/201593\/","title":{"rendered":"redis\u00a0setIfAbsent\u8fd4\u56denull\u7684\u95ee\u9898\u53ca\u89e3\u51b3"},"content":{"rendered":"<p><b><\/b> <\/p>\n<h1>redis&nbsp;setIfAbsent\u8fd4\u56denull\u7684\u95ee\u9898\u53ca\u89e3\u51b3<\/h1>\n<p><span style=\"cursor: pointer\"><i><\/i>\u6536\u85cf<\/span> <\/p>\n<p><span style=\"font-family:\">\u5b66\u4e60\u77e5\u8bc6\u8981\u5584\u4e8e\u601d\u8003\uff0c\u601d\u8003\uff0c\u518d\u601d\u8003\uff01\u4eca\u5929golang\u5b66\u4e60\u7f51\u5c0f\u7f16\u5c31\u7ed9\u5927\u5bb6\u5e26\u6765<span style=\"color: #FF6600;font-family:\">\u300aredis&nbsp;setIfAbsent\u8fd4\u56denull\u7684\u95ee\u9898\u53ca\u89e3\u51b3\u300b<\/span>\uff0c\u4ee5\u4e0b\u5185\u5bb9\u4e3b\u8981\u5305\u542b<span style=\"color: #FF6600;font-family:\">redissetIfAbsent\u3001null<\/span>\u7b49\u77e5\u8bc6\u70b9\uff0c\u5982\u679c\u4f60\u6b63\u5728\u5b66\u4e60\u6216\u51c6\u5907\u5b66\u4e60<span style=\"color: #FF6600;font-family:\">\u6570\u636e\u5e93<\/span>\uff0c\u5c31\u90fd\u4e0d\u8981\u9519\u8fc7\u672c\u6587\u5566~\u8ba9\u6211\u4eec\u4e00\u8d77\u6765\u770b\u770b\u5427\uff0c\u80fd\u5e2e\u52a9\u5230\u4f60\u5c31\u66f4\u597d\u4e86\uff01<\/span><\/p>\n<h2>\u8d77\u56e0<\/h2>\n<p>\u4eca\u5929\u5728\u5199\u4e1a\u52a1\u4ee3\u7801\u7684\u65f6\u5019\uff0c\u7528\u5230\u4e86StringRedisTemplate\u4e2dredisTemplate.opsForValue().setIfAbsent()\u4e2d\u5e76\u4e0d\u662f\u6211\u671f\u671b\u7684true\u6216\u8005false\u800c\u662f\u8fd4\u56de\u4e86null\uff0c\u8d77\u521d\u6211\u8fd8\u4ee5\u4e3a\u662f\u56e0\u4e3aReturns:null when used in pipeline \/ transaction.\u8fd9\u4e2a\u539f\u56e0\uff0c\u4f46\u662f\u6211\u5e76\u6ca1\u6709\u5728\u4e1a\u52a1\u4e2d\u4f7f\u7528\u5230\u4e8b\u52a1\u3002<\/p>\n<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20230225\/167728954263f96846c6630.png\" class=\"aligncenter\"><\/p>\n<h2>\u539f\u56e0<\/h2>\n<p>\u9042\u4f7f\u7528\u8c37\u6b4c\u5927\u6cd5\uff0c\u624d\u641c\u5230\u539f\u6765\u8fd9\u662f\u56e0\u4e3aRedisson\u7684bug\uff0c\u7f51\u53cb\u7ed9\u51fa\u7684\u89e3\u51b3\u65b9\u6848\u662f\u53bb\u6389\u5c31\u597d\u4e86\uff0c\u4f46\u662f\u4e0d\u53ef\u80fd\u56e0\u4e3a\u8fd9\u4e2a\u95ee\u9898\u5c31\u4e0d\u4f7f\u7528Redisson\uff0c\u770b\u6765\u53c8\u770b\u4f46\u4e00\u4e2a\u5e16\u5b50\uff0c\u8bf4\u8fd9\u662fredisson\u7684bug\u3002<\/p>\n<p>\u770b\u5230\u8fd9\u91cc\uff0c\u6211\u5c31\u60f3\u5230\u53bb\u770b\u770bgithub\u4e2d\u662f\u4e0d\u662f\u6709\u76f8\u5173\u7684issue\u5462\uff1f<\/p>\n<h2>\u89e3\u51b3<\/h2>\n<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20230225\/167728954363f96847471f8.png\" class=\"aligncenter\"><\/p>\n<p>\u679c\u7136\uff0c\u6211\u4eec\u53ef\u4ee5\u770b\u5230\u6709\u4e24\u4e2aissue\u662f\u5173\u4e8esetIfAbsent\u8fd4\u56denull\u7684\u95ee\u9898\uff0c\u8ba9\u6211\u4eec\u53bb\u3002<\/p>\n<p>\u5176\u4e2d\u63d0\u5230\u5728#2811\u4e2d\u4fee\u590d<\/p>\n<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20230225\/167728954363f96847aa31c.png\" class=\"aligncenter\"><\/p>\n<p>\u4e5f\u53ef\u4ee5\u660e\u786e\u770b\u5230\u5173\u4e8e\u6b64bug\u7684\u4fee\u590d\u4ee3\u7801<\/p>\n<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20230225\/167728954463f9684804470.png\" class=\"aligncenter\"><\/p>\n<p>\u8ba9\u6211\u4eec\u4e00\u8d77\u770b\u770b\u8fd9\u4e2aBooleanNullSafeReplayConvertor\u662f\u4f55\u65b9\u795e\u5723\uff0c\u600e\u4e48\u89e3\u51b3\u7684\u8fd4\u56de\u503c\u4e3anull\u7684bug.<\/p>\n<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20230225\/167728954463f9684859dc8.png\" class=\"aligncenter\"><\/p>\n<p>\u5176\u5b9e\u89e3\u51b3\u7684\u65b9\u5f0f\u4e5f\u5f88\u7b80\u5355\u66b4\u529b\uff0c\u5c31\u662f\u628a\u4e4b\u524d\u7684obj == null return null\u6539\u4e3a\u4e86obj == null return false\u5e76\u4e14\u53bb\u6389\u4e86\u6cdb\u578b\u3002<\/p>\n<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20230225\/167728954463f96848bec3b.png\" class=\"aligncenter\"><\/p>\n<p>\u4ee5\u4e0a\u4e3a\u4e2a\u4eba\u7ecf\u9a8c\uff0c\u5e0c\u671b\u80fd\u7ed9\u5927\u5bb6\u4e00\u4e2a\u53c2\u8003\uff0c\u4e5f\u5e0c\u671b\u5927\u5bb6\u591a\u591a\u652f\u6301golang\u5b66\u4e60\u7f51\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>redis&nbsp;setIf&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-201593","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/201593","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=201593"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/201593\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=201593"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=201593"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=201593"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}