{"id":201465,"date":"2025-05-10T08:21:07","date_gmt":"2025-05-10T00:21:07","guid":{"rendered":"https:\/\/server.hk\/cnblog\/201465\/"},"modified":"2025-05-10T08:21:07","modified_gmt":"2025-05-10T00:21:07","slug":"%e6%b5%85%e8%b0%88redis%e7%bc%93%e5%ad%98%e9%9b%aa%e5%b4%a9%e8%a7%a3%e5%86%b3%e6%96%b9%e6%a1%88","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/201465\/","title":{"rendered":"\u6d45\u8c08Redis\u7f13\u5b58\u96ea\u5d29\u89e3\u51b3\u65b9\u6848"},"content":{"rendered":"

<\/b> <\/p>\n

\u6d45\u8c08Redis\u7f13\u5b58\u96ea\u5d29\u89e3\u51b3\u65b9\u6848<\/h1>\n

<\/i>\u6536\u85cf<\/span> <\/p>\n

\u5bf9\u4e8e\u4e00\u4e2a\u6570\u636e\u5e93\u5f00\u53d1\u8005\u6765\u8bf4\uff0c\u7262\u56fa\u624e\u5b9e\u7684\u57fa\u7840\u662f\u5341\u5206\u91cd\u8981\u7684\uff0cgolang\u5b66\u4e60\u7f51\u5c31\u6765\u5e26\u5927\u5bb6\u4e00\u70b9\u70b9\u7684\u638c\u63e1\u57fa\u7840\u77e5\u8bc6\u70b9\u3002\u4eca\u5929\u672c\u7bc7\u6587\u7ae0\u5e26\u5927\u5bb6\u4e86\u89e3\u300a\u6d45\u8c08Redis\u7f13\u5b58\u96ea\u5d29\u89e3\u51b3\u65b9\u6848\u300b\uff0c\u4e3b\u8981\u4ecb\u7ecd\u4e86Redis\u7f13\u5b58\u96ea\u5d29\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u7684\u77e5\u8bc6\u79ef\u7d2f\u6709\u6240\u5e2e\u52a9\uff0c\u5feb\u70b9\u6536\u85cf\u8d77\u6765\u5427\uff0c\u5426\u5219\u9700\u8981\u65f6\u5c31\u627e\u4e0d\u5230\u4e86\uff01<\/p>\n

\u7f13\u5b58\u5c42\u627f\u8f7d\u7740\u5927\u91cf\u7684\u8bf7\u6c42,\u6709\u6548\u4fdd\u62a4\u4e86\u5b58\u50a8\u5c42\u3002\u4f46\u662f\u5982\u679c\u7531\u4e8e\u5927\u91cf\u7f13\u5b58\u5931\u6548\u6216\u8005\u7f13\u5b58\u6574\u4f53\u4e0d\u80fd\u63d0\u4f9b\u670d\u52a1,\u5bfc\u81f4\u5927\u91cf\u7684\u8bf7\u6c42\u5230\u8fbe\u5b58\u50a8\u5c42,\u4f1a\u4f7f\u5b58\u50a8\u5c42\u8d1f\u8f7d\u589e\u52a0(\u5927\u91cf\u7684\u8bf7\u6c42\u67e5\u8be2\u6570\u636e\u5e93) \u3002\u8fd9\u5c31\u662f\u7f13\u5b58\u96ea\u5d29\u7684\u573a\u666f;<\/p>\n

\u89e3\u51b3\u7f13\u5b58\u96ea\u5d29\u53ef\u4ee5\u4ece\u4e0b\u9762\u7684\u51e0\u70b9\u7740\u624b\uff1a<\/p>\n

1.\u4fdd\u6301\u7f13\u5b58\u5c42\u7684\u9ad8\u53ef\u7528<\/h2>\n

\u4f7f\u7528Redis\u54e8\u5175\u6a21\u5f0f\u6216\u8005Redis\u96c6\u7fa4\u90e8\u7f72\u65b9\u5f0f,\u5373\u662f\u4e2a\u522bRedis\u8282\u70b9\u4e0b\u7ebf,\u6574\u4e2a\u7f13\u5b58\u5c42\u4f9d\u7136\u53ef\u4ee5\u4f7f\u7528\u3002\u9664\u6b64\u4e4b\u5916\u8fd8\u53ef\u4ee5\u5728\u591a\u4e2a\u673a\u623f\u90e8\u7f72Redis,\u8fd9\u6837\u5373\u4fbf\u662f\u673a\u623f\u6b7b\u673a,\u4f9d\u7136\u53ef\u4ee5\u5b9e\u73b0\u7f13\u5b58\u5c42\u7684\u9ad8\u53ef\u7528\u3002<\/p>\n

2.\u9650\u6d41\u964d\u7ea7\u7ec4\u4ef6<\/h2>\n

\u65e0\u8bba\u662f\u7f13\u5b58\u5c42\u8fd8\u662f\u5b58\u50a8\u5c42\u90fd\u4f1a\u6709\u51fa\u9519\u7684\u6982\u7387,\u53ef\u4ee5\u5c06\u5b83\u4eec\u89c6\u4e3a\u8d44\u6e90\u3002\u4f5c\u4e3a\u5e76\u53d1\u91cf\u8f83\u5927\u7684\u5206\u5e03\u5f0f\u7cfb\u7edf\uff0c\u5047\u5982\u6709\u4e00\u4e2a\u8d44\u6e90\u4e0d\u53ef\u7528\uff0c\u53ef\u80fd\u4f1a\u9020\u6210\u6240\u6709\u7ebf\u7a0b\u5728\u83b7\u53d6\u8fd9\u4e2a\u8d44\u6e90\u65f6\u5f02\u5e38\uff0c\u9020\u6210\u6574\u4e2a\u7cfb\u7edf\u4e0d\u53ef\u7528\u3002\u964d\u7ea7\u5728\u9ad8\u5e76\u53d1\u7cfb\u7edf\u4e2d\u662f\u975e\u5e38\u6b63\u5e38\u7684\uff0c\u6bd4\u5982\u63a8\u8350\u670d\u52a1\u4e2d\uff0c\u5982\u679c\u4e2a\u6027\u5316\u63a8\u8350\u670d\u52a1\u4e0d\u53ef\u7528\uff0c\u53ef\u4ee5\u964d\u7ea7\u8865\u5145\u70ed\u70b9\u6570\u636e\uff0c\u4e0d\u81f3\u4e8e\u9020\u6210\u6574\u4e2a\u63a8\u8350\u670d\u52a1\u4e0d\u53ef\u7528\u3002\u5e38\u89c1\u7684\u9650\u6d41\u964d\u7ea7\u7ec4\u4ef6\u5982 Hystrix\u3001Sentinel \u7b49\u3002<\/p>\n

3.\u7f13\u5b58\u4e0d\u8fc7\u671f<\/h2>\n

Redis \u4e2d\u4fdd\u5b58\u7684 key \u6c38\u4e0d\u5931\u6548\uff0c\u8fd9\u6837\u5c31\u4e0d\u4f1a\u51fa\u73b0\u5927\u91cf\u7f13\u5b58\u540c\u65f6\u5931\u6548\u7684\u95ee\u9898\uff0c\u4f46\u662f\u968f\u4e4b\u800c\u6765\u7684\u5c31\u662fRedis \u9700\u8981\u66f4\u591a\u7684\u5b58\u50a8\u7a7a\u95f4\u3002<\/p>\n

4.\u4f18\u5316\u7f13\u5b58\u8fc7\u671f\u65f6\u95f4<\/h2>\n

\u8bbe\u8ba1\u7f13\u5b58\u65f6\uff0c\u4e3a\u6bcf\u4e00\u4e2a key \u9009\u62e9\u5408\u9002\u7684\u8fc7\u671f\u65f6\u95f4\uff0c\u907f\u514d\u5927\u91cf\u7684 key \u5728\u540c\u4e00\u65f6\u523b\u540c\u65f6\u5931\u6548\uff0c\u9020\u6210\u7f13\u5b58\u96ea\u5d29\u3002<\/p>\n

5.\u4f7f\u7528\u4e92\u65a5\u9501\u91cd\u5efa\u7f13\u5b58<\/h2>\n

\u5728\u9ad8\u5e76\u53d1\u573a\u666f\u4e0b\uff0c\u4e3a\u4e86\u907f\u514d\u5927\u91cf\u7684\u8bf7\u6c42\u540c\u65f6\u5230\u8fbe\u5b58\u50a8\u5c42\u67e5\u8be2\u6570\u636e\u3001\u91cd\u5efa\u7f13\u5b58\uff0c\u53ef\u4ee5\u4f7f\u7528\u4e92\u65a5\u9501\u63a7\u5236\uff0c\u5982\u6839\u636e key \u53bb\u7f13\u5b58\u5c42\u67e5\u8be2\u6570\u636e\uff0c\u5f53\u7f13\u5b58\u5c42\u4e3a\u547d\u4e2d\u65f6\uff0c\u5bf9 key \u52a0\u9501\uff0c\u7136\u540e\u4ece\u5b58\u50a8\u5c42\u67e5\u8be2\u6570\u636e\uff0c\u5c06\u6570\u636e\u5199\u5165\u7f13\u5b58\u5c42\uff0c\u6700\u540e\u91ca\u653e\u9501\u3002\u82e5\u5176\u4ed6\u7ebf\u7a0b\u53d1\u73b0\u83b7\u53d6\u9501\u5931\u8d25\uff0c\u5219\u8ba9\u7ebf\u7a0b\u4f11\u7720\u4e00\u6bb5\u65f6\u95f4\u540e\u91cd\u8bd5\u3002\u5bf9\u4e8e\u9501\u7684\u7c7b\u578b\uff0c\u5982\u679c\u662f\u5728\u5355\u673a\u73af\u5883\u4e0b\u53ef\u4ee5\u4f7f\u7528 Java \u5e76\u53d1\u5305\u4e0b\u7684 Lock\uff0c\u5982\u679c\u662f\u5728\u5206\u5e03\u5f0f\u73af\u5883\u4e0b\uff0c\u53ef\u4ee5\u4f7f\u7528\u5206\u5e03\u5f0f\u9501\uff08Redis \u4e2d\u7684 SETNX \u65b9\u6cd5\uff09\u3002<\/p>\n

\u5206\u5e03\u5f0f\u73af\u5883\u4e0b\u4e92\u65a5\u9501\u91cd\u5efa\u7f13\u5b58\u4f2a\u4ee3\u7801<\/p>\n

\/**\n * \u4e92\u65a5\u9501\u5efa\u7acb\u7f13\u5b58\n *\n **\/\npublic String get(String key) {\n   \/\/ redis\u4e2d\u67e5\u8be2key\u5bf9\u5e94\u7684value\n   String value = redis.get(key);\n   \/\/ \u7f13\u5b58\u672a\u547d\u4e2d\n   if (value == null) {\n      \/\/ \u4e92\u65a5\u9501\n      String key_mutex_lock = \"mutex:lock\" + key; \n      \/\/ \u4e92\u65a5\u9501\u52a0\u9501\u6210\u529f\n      if(redis.setnx(key_mutex_lock,\"1\")) { \/\/ \u8fd4\u56de 0\uff08false\uff09,1\uff08true\uff09\n          try {\n              \/\/ \u8bbe\u7f6e\u4e92\u65a5\u9501\u8d85\u65f6\u65f6\u95f4,\u8fd9\u91cc\u8bbe\u7f6e\u7684\u662f\u9501\u7684\u5931\u6548\u65f6\u95f4,\u800c\u4e0d\u662fkey\u7684\u5931\u6548\u65f6\u95f4\n              redis.expire(key_mutex_lock,3*60);\n              \/\/ \u4ece\u6570\u636e\u5e93\u67e5\u8be2\n              value = db.get(key);\n              \/\/ \u6570\u636e\u5199\u5165\u7f13\u5b58\n              redis.set(key,value);\n            \n          } finally {\n               \/\/ \u91ca\u653e\u9501\n              boolean keyExist = jedis.exists(key_mutex_lock);\n              if(keyExist){\n                  redis.delete(key_mutex_lock);\n               }\n      } else { \n              \/\/ \u52a0\u9501\u5931\u8d25,\u7ebf\u7a0b\u4f11\u606f50ms\u540e\u91cd\u8bd5\n               Thread.sleep(50);\n               return get(key); \/\/ \u76f4\u63a5\u8fd4\u56de\u7f13\u5b58\u7ed3\u679c  \n     }\n   }\n}\n<\/pre>\n
\u5206\u5e03\u5f0f\u73af\u5883\u4e0b\u4f7f\u7528Redis \u5206\u5e03\u5f0f\u9501\u5b9e\u73b0\u7f13\u5b58\u91cd\u5efa\uff0c\u4f18\u70b9\u662f\u8bbe\u8ba1\u601d\u8def\u7b80\u5355\uff0c\u5bf9\u6570\u636e\u4e00\u81f4\u6027\u6709\u4fdd\u969c;\u7f3a\u70b9\u662f\u4ee3\u7801\u590d\u6742\u5ea6\u589e\u52a0\uff0c\u6709\u53ef\u80fd\u4f1a\u9020\u6210\u7528\u6237\u7b49\u5f85\u3002\u5047\u8bbe\u5728\u9ad8\u5e76\u53d1\u4e0b\uff0c\u7f13\u5b58\u91cd\u5efa\u671f\u95f4 key \u662f\u9501\u7740\u7684\uff0c\u5982\u679c\u5f53\u524d\u5e76\u53d1 1000 \u4e2a\u8bf7\u6c42\uff0c\u5176\u4e2d 999 \u4e2a\u90fd\u5728\u963b\u585e\uff0c\u4f1a\u5bfc\u81f4 999 \u4e2a\u7528\u6237\u8bf7\u6c42\u963b\u585e\u800c\u7b49\u5f85\u3002<\/p>\n
6.\u5f02\u6b65\u91cd\u5efa\u7f13\u5b58<\/h2>\n
\u5728\u8fd9\u79cd\u65b9\u6848\u4e0b\u6784\u5efa\u7f13\u5b58\u91c7\u53d6\u5f02\u6b65\u7b56\u7565\uff0c\u4f1a\u4ece\u7ebf\u7a0b\u6c60\u4e2d\u83b7\u53d6\u7ebf\u7a0b\u6765\u5f02\u6b65\u6784\u5efa\u7f13\u5b58\uff0c\u4ece\u800c\u4e0d\u4f1a\u8ba9\u6240\u6709\u7684\u8bf7\u6c42\u76f4\u63a5\u5230\u8fbe\u5b58\u50a8\u5c42\uff0c\u8be5\u65b9\u6848\u4e2d\u6bcf\u4e2aRedis key \u7ef4\u62a4\u903b\u8f91\u8d85\u65f6\u65f6\u95f4\uff0c\u5f53\u903b\u8f91\u8d85\u65f6\u65f6\u95f4\u5c0f\u4e8e\u5f53\u524d\u65f6\u95f4\u65f6\uff0c\u5219\u8bf4\u660e\u5f53\u524d\u7f13\u5b58\u5df2\u7ecf\u5931\u6548\uff0c\u5e94\u5f53\u8fdb\u884c\u7f13\u5b58\u66f4\u65b0\uff0c\u5426\u5219\u8bf4\u660e\u5f53\u524d\u7f13\u5b58\u672a\u5931\u6548\uff0c\u76f4\u63a5\u8fd4\u56de\u7f13\u5b58\u4e2d\u7684 value \u503c\u3002\u5982\u5728Redis \u4e2d\u5c06 key \u7684\u8fc7\u671f\u65f6\u95f4\u8bbe\u7f6e\u4e3a 60 min\uff0c\u5728\u5bf9\u5e94\u7684 value \u4e2d\u8bbe\u7f6e\u903b\u8f91\u8fc7\u671f\u65f6\u95f4\u4e3a 30 min\u3002\u8fd9\u6837\u5f53 key \u5230\u4e86 30 min \u7684\u903b\u8f91\u8fc7\u671f\u65f6\u95f4\uff0c\u5c31\u53ef\u4ee5\u5f02\u6b65\u66f4\u65b0\u8fd9\u4e2a key \u7684\u7f13\u5b58\uff0c\u4f46\u662f\u5728\u66f4\u65b0\u7f13\u5b58\u7684\u8fd9\u6bb5\u65f6\u95f4\u5185\uff0c\u65e7\u7684\u7f13\u5b58\u4f9d\u7136\u53ef\u7528\u3002\u8fd9\u79cd\u5f02\u6b65\u91cd\u5efa\u7f13\u5b58\u7684\u65b9\u5f0f\u53ef\u4ee5\u6709\u6548\u907f\u514d\u5927\u91cf\u7684 key \u540c\u65f6\u5931\u6548\u3002<\/p>\n
\/**\n  *  \u5f02\u6b65\u91cd\u5efa\u7f13\u5b58: ValueObject\u4e3a\u5bf9\u5e94\u7684\u5c01\u88c5\u7684\u5b9e\u4f53\u6a21\u578b\n  *\n  **\/\npublic String get(String key) {\n    \/\/ \u91cd\u7f13\u5b58\u4e2d\u67e5\u8be2key\u5bf9\u5e94\u7684ValueObject\u5bf9\u8c61\n    ValueObject valueObject = redis.get(key);\n    \/\/ \u83b7\u53d6\u5b58\u50a8\u4e2d\u5bf9\u5e94\u7684value\u503c\n    String value = valueObject.getValue();\n    \/\/ \u83b7\u53d6\u5b9e\u4f53\u6a21\u578b\u4e2d\u7684\u7f13\u5b58\u8fc7\u671f\u7684\u65f6\u95f4\uff1atimeOut = \u8bbe\u7f6e\u7f13\u5b58\u65f6\u7684\u5f53\u524d\u65f6\u95f4+\u8fc7\u671f\u65f6\u95f4(\u598230\u79d2,60\u79d2\u7b49\u7b49)\n    long logicTimeOut = valueObject.getTimeOut();  \/\/ \u7b49\u4f4d\u6362\u7b97\u4e3along\u7c7b\u578b\n    \/\/ \u5f53\u524d\u53ef\u4ee5\u5728\u903b\u8f91\u4e0a\u5931\u6548\n    if (logicTimeOut \n<\/pre>\n","protected":false},"excerpt":{"rendered":"
\u6d45\u8c08Redis\u7f13\u5b58\u96ea\u5d29\u89e3\u51b3\u65b9\u6848 ...<\/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-201465","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/201465","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=201465"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/201465\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=201465"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=201465"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=201465"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}