{"id":201349,"date":"2025-05-10T08:48:20","date_gmt":"2025-05-10T00:48:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/201349\/"},"modified":"2025-05-10T08:48:20","modified_gmt":"2025-05-10T00:48:20","slug":"redis%e5%ae%9e%e7%8e%b0%e5%88%86%e5%b8%83%e5%bc%8f%e9%94%81setnx%e3%80%81getset%e3%80%81incr%e4%bb%a5%e5%8f%8a%e5%a6%82%e4%bd%95%e5%a4%84%e7%90%86%e8%b6%85%e6%97%b6%e6%83%85%e5%86%b5","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/201349\/","title":{"rendered":"Redis\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501(setnx\u3001getset\u3001incr)\u4ee5\u53ca\u5982\u4f55\u5904\u7406\u8d85\u65f6\u60c5\u51b5"},"content":{"rendered":"<p><b><\/b> <\/p>\n<h1>Redis\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501(setnx\u3001getset\u3001incr)\u4ee5\u53ca\u5982\u4f55\u5904\u7406\u8d85\u65f6\u60c5\u51b5<\/h1>\n<p><span style=\"cursor: pointer\"><i><\/i>\u6536\u85cf<\/span> <\/p>\n<p>\u4eb2\u7231\u7684\u7f16\u7a0b\u5b66\u4e60\u7231\u597d\u8005\uff0c\u5982\u679c\u4f60\u70b9\u5f00\u4e86\u8fd9\u7bc7\u6587\u7ae0\uff0c\u8bf4\u660e\u4f60\u5bf9\u300aRedis\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501(setnx\u3001getset\u3001incr)\u4ee5\u53ca\u5982\u4f55\u5904\u7406\u8d85\u65f6\u60c5\u51b5\u300b\u5f88\u611f\u5174\u8da3\u3002\u672c\u7bc7\u6587\u7ae0\u5c31\u6765\u7ed9\u5927\u5bb6\u8be6\u7ec6\u89e3\u6790\u4e00\u4e0b\uff0c\u4e3b\u8981\u4ecb\u7ecd\u4e00\u4e0b\u8d85\u65f6\u3001Redis\u5206\u5e03\u5f0f\u9501\uff0c\u5e0c\u671b\u6240\u6709\u8ba4\u771f\u8bfb\u5b8c\u7684\u7ae5\u978b\u4eec\uff0c\u90fd\u6709\u5b9e\u8d28\u6027\u7684\u63d0\u9ad8\u3002<\/p>\n<p>\u5982\u679c\u4f60\u901a\u8fc7\u7f51\u7edc\u641c\u7d22\u5206\u5e03\u5f0f\u9501\uff0c\u6700\u591a\u7684\u5c31\u662f\u57fa\u4e8eredis\u7684\u4e86\u3002\u57fa\u4e8eredis\u7684\u5206\u5e03\u5f0f\u9501\u5f97\u76ca\u4e8eredis\u7684\u5355\u7ebf\u7a0b\u6267\u884c\u673a\u5236\uff0c\u5355\u7ebf\u7a0b\u5728\u6267\u884c\u4e0a\u5c31\u4fdd\u8bc1\u4e86\u6307\u4ee4\u7684\u987a\u5e8f\u5316\uff0c\u6240\u4ee5\u5f88\u5927\u7a0b\u5ea6\u4e0a\u964d\u4f4e\u4e86\u5f00\u53d1\u4eba\u5458\u7684\u601d\u8003\u8bbe\u8ba1\u6210\u672c\u3002<\/p>\n<h2>\u4e00\u3001\u901a\u8fc7setnx\u5b9e\u73b0<br \/><\/h2>\n<h3>1\u3001setnx key value<br \/><\/h3>\n<p>\u5f53\u4e14\u4ec5\u5f53key\u4e0d\u5b58\u5728\uff0c\u5c06key\u7684\u503c\u8bbe\u7f6e\u4e3avalue\uff0c\u5e76\u4e14\u8fd4\u56de1\uff1b\u82e5\u662f\u7ed9\u5b9a\u7684key\u5df2\u7ecf\u5b58\u5728\uff0c\u5219setnx\u4e0d\u505a\u4efb\u4f55\u52a8\u4f5c\uff0c\u8fd4\u56de0\u3002<\/p>\n<pre>\npublic static Boolean setnx(final String key, final String value, final long seconds) {\n        return getShardedJedisClient().execute(new ShardedJedisAction\n   \n    () {\n            public Boolean doAction(ShardedJedis shardedJedis) {\n                Jedis jedis = (Jedis) shardedJedis.getShard(key);\n                String result = jedis.set(key, value, \"NX\", \"EX\", seconds);\n                return \"OK\".equalsIgnoreCase(result);\n            }\n        });\n    }\n   <\/pre>\n<h3>2\u3001get key<br \/><\/h3>\n<p>\u83b7\u53d6key\u5bf9\u5e94\u7684value\u503c\uff0c\u5982\u679c\u4e0d\u5b58\u5728\u8be5key\uff0c\u8fd4\u56de0\u3002<\/p>\n<pre>\npublic String get(final String key) {\n        this.checkIsInMulti();\n        return (String)this.execute(new SmartJedis.Action\n   \n    () {\n            public String doAction(Jedis jedis) {\n                return jedis.get(key);\n            }\n        }, SmartJedis.RW.R, key);\n    }\n\n   <\/pre>\n<h3>3\u3001getset key value<br \/><\/h3>\n<p>\u83b7\u53d6key\u7684\u65e7\u503c\uff0c\u5c06\u65b0value\u653e\u5165<\/p>\n<pre>\npublic static String getset(final String key, final String value) {\n        return getShardedJedisClient().execute(new ShardedJedisAction\n   \n    () {\n            @Override\n            public String doAction(ShardedJedis shardedJedis) {\n                return shardedJedis.getSet(key, value);\n            }\n        });\n    }\n   <\/pre>\n<p>\u81f3\u6b64\uff0c\u6211\u4eec\u5148\u4e3e\u4e2a\u624b\u673a\u4e09\u8981\u7d20\u9a8c\u8bc1\u7684\u5217\u5b50\uff1a(A\u6e20\u9053\u7cfb\u7edf\uff0c\u4e1a\u52a1B\u7cfb\u7edf\uff0c\u5916\u90e8\u5382\u5546C\u7cfb\u7edf)<br \/> (1)B\u4e1a\u52a1\u7cfb\u7edf\u8c03\u7528A\u6e20\u9053\u7cfb\u7edf\uff0c\u9a8c\u8bc1\u4f20\u5165\u7684\u624b\u673a\u3001\u8eab\u4efd\u8bc1\u3001\u53f7\u7801\u4e09\u8981\u7d20\u662f\u5426\u4e00\u4e00\u81f4\u3002<br \/> (2)A\u6e20\u9053\u7cfb\u7edf\u518d\u8c03\u7528\u5916\u90e8\u5382\u5546C\u7cfb\u7edf\u3002<br \/> (3)A\u6e20\u9053\u7cfb\u7edf\u5c06\u7ed3\u679c\u8fd4\u56de\u7ed9B\u4e1a\u52a1\u7cfb\u7edf\u3002<br \/> \u8fd93\u4e2a\u8fc7\u7a0b\u4e2d\uff0c(2)\u8fc7\u7a0b\uff0c\u5916\u90e8\u5382\u5546\u7684\u8c03\u7528\u65f6\u662f\u9700\u8981\u8ba1\u8d39\u7684\u3002<br \/> \u5f53B\u4e1a\u52a1\u7cfb\u7edf\u5e76\u53d1\u91cf\u5f88\u9ad8\u65f6\uff0c\u6709100\u7b14\u76f8\u540c\u7684\u4e09\u8981\u7d20\u6821\u9a8c\uff0c\u7531\u4e8e\u662f\u76f8\u540c\u7684\u4e09\u8981\u7d20\uff0cA\u6e20\u9053\u53ea\u8981\u8c03\u7528\u4e00\u6b21\u5382\u5546\u5373\u53ef\u77e5\u9053\u7ed3\u679c\u3002\u90a3\u4e48A\u6e20\u9053\u7cfb\u7edf\u5982\u4f55\u63a7\u5236\u4e0d\u8ba9100\u7b14\u8bf7\u6c42\u5168\u90e8\u53bb\u8bbf\u95ee\u5916\u90e8\u5382\u5546C\u7cfb\u7edf\u5462\uff1f<\/p>\n<h3>\u5c0f\u660e\u63d0\u51fa\u4e86\u65b9\u6848\u4e00\uff1a<br \/><\/h3>\n<p>\u5728A\u7cfb\u7edf\u4e2d\uff0c<br \/> \u5f53100\u4e2a\u7ebf\u7a0b\u540c\u65f6\u8bf7\u6c42\u8fc7\u6765\uff0c\u8fdb\u884credis.setnx(\u201cLOCK_KEY_phone&amp;idNo&amp;name\u201d,\u201ddemo\u201d)\uff0c\u8fd9\u6837\u7b2c\u4e00\u7b14\u7ebf\u7a0b\u7387\u5148\u62ff\u5230\u9501\uff0c\u5176\u4ed6\u7684\u7ebf\u7a0b\u7b49\u5f85\uff0c\u5f53thread(0)\u5904\u7406\u7ed3\u675f\u540e\uff0cthread(0)\u8fdb\u884cdelete(\u201cLOCK_KEY_phone&amp;idNo&amp;name\u201d),\u628a\u9501\u653e\u5f00\uff0cthread(i)\u8fdb\u884cget(\u201cLOCK_KEY_phone&amp;idNo&amp;name\u201d)\u62ff\u52300\uff0c\u8bf4\u660e\u4e0a\u4e00\u7b14\u5df2\u7ecf\u5904\u7406\u5b8c\u6210\uff0c\u8fd9\u4e2a\u65f6\u5019\uff0c\u6211\u4eec\u53ef\u4ee5\u53bb\u67e5\u8be2\u4e0a\u4e00\u7b14\u7684\u8bb0\u5f55\u3002<\/p>\n<pre>\nRedisUtils.setnx(\"LOCK_KEY_phone&amp;idNo&amp;name\",\"demo\");\nJSONObject result = A.request(B);\nAssetUtils.notNull(result,ResponseCodeEnum.Success,\"\u62ff\u5230\u7ed3\u679c\");\nResultDmo resultDmo = (ResultDmo)BeanUtils.maptoBean(result);\nresultDao.insert(resultDmo);\nif(result!=0){\n  \/\/\u4e0a\u4e00\u7b14\u540c\u6837\u7684\u8bf7\u6c42\u8fd8\u672a\u5904\u7406\u5b8c\u6210\uff0c\u8f6e\u8bad\u7b49\u5f85(\u5177\u4f53\u5982\u4f55\u8f6e\u8bad\u5728\u6b64\u4e0d\u5c55\u5f00)\n}else{\n  \/\/\u4e0a\u4e00\u7b14\u540c\u6837\u7684\u8bf7\u6c42\u5904\u7406\u5b8c\u6210\uff0c\u8fdb\u884c\u67e5\u5e93\u64cd\u4f5c\n  resultDao.select(\"\u53c2\u6570\");\n}<\/pre>\n<h3>\u5c0f\u5b8f\u8bf4\uff1a\u5c0f\u660e\u7684\u601d\u60f3\u4e0d\u4e25\u8c28<br \/><\/h3>\n<p>\u95ee\u9898\uff1a\u5f53100\u7b14\u7ebf\u7a0b\u4e2d\u4e00\u4e9b\u7ebf\u7a0b\u8d85\u65f6\u6216\u8005\u7cfb\u7edf\u5b95\u673a\u7b49\u610f\u5916\u60c5\u51b5\u53d1\u73b0\uff0c\u9501\u4f1a\u4e00\u76f4\u88ab\u67d0\u4e9b\u7ebf\u7a0b\u6301\u6709\uff0c\u9020\u6210\u6b7b\u9501\u72b6\u6001\u3002<br \/> \u5e94\u8be5\u7ed9\u7f13\u5b58key\u8bbe\u7f6e\u4e00\u4e2a\u8d85\u65f6\u65f6\u95f4\u3002\u6bd4\u5982:200ms<\/p>\n<pre>\nRedisUtils.setnx(\"LOCK_KEY_phone&amp;idNo&amp;name\",\"demo\",200);<\/pre>\n<p>\u8fd9\u79cd\u60c5\u51b5\u662f\uff0c\u5927\u81f4\u5224\u65ad\u4e86\u5916\u90e8\u5382\u5546C\u7cfb\u7edf\u4e1a\u52a1\u5904\u7406\u65f6\u95f4\u5927\u6982\u4e3a200ms\uff0c<\/p>\n<h3>\u7f51\u4e0a\u770b\u8fd8\u6709\u4e00\u79cd\u65b9\u5f0f\uff08B\uff09\uff1a<\/h3>\n<pre>\nRedisUtils.setnx(\"LOCK_KEY_phone&amp;idNo&amp;name\",currentTime,200);\nLong old = RedisUtils.get(\"LOCK_KEY_phone&amp;idNo&amp;name\");\nLong new = System.currentTimeMillis();\nLong time = new - old;\nif(time&gt;0){\n\/\/\u5904\u7406\u5df2\u7ecf\u8d85\u65f6\nRedisUtils.delete(\"LOCK_KEY_phone&amp;idNo&amp;name\");\n}\n<\/pre>\n<p>\uff08B\uff09\u8fd9\u79cd\u60c5\u51b5\u4e0d\u4e25\u8c28\uff1a\u5f53a\u83b7\u53d6setnx\u9501\uff0ca\u7ebf\u7a0b\u5d29\u6e83\u6216\u8d85\u65f6\uff0cb\u3001c\u7ebf\u7a0b\u540c\u65f6get\u5230old\uff0c\u4e14\u5224\u65ad\u8d85\u65f6\uff0c\u53ef\u80fd\u51fa\u73b0b\u7ebf\u7a0bdelete a\u7ebf\u7a0b\u7684\u9501\uff0c\u5e76\u4e14setnx\u540e\uff1bc\u7ebf\u7a0b\u53c8\u5c06b\u7ebf\u7a0b\u7684\u9501delete,\u5e76\u4e14setnx\u3002\u8fd9\u79cd\u60c5\u51b5\u5b8c\u5168\u9501\u4e0d\u4f4f\u7ebf\u7a0b\u4e86\u3002<\/p>\n<p>\uff08B\uff09\u65b9\u6848\u7684\u5347\u7ea7\u7248\u2014-&gt;&gt;\uff08C\uff09\u65b9\u6848\uff1a<\/p>\n<p>\u5f53a\u83b7\u53d6setnx\u9501\uff0ca\u7ebf\u7a0b\u5d29\u6e83\u6216\u8d85\u65f6\uff0cb\u7ebf\u7a0bgetset\uff0c\u83b7\u53d6old\u4e14\u5224\u65ad\u8d85\u65f6\uff0cc\u7ebf\u7a0bgetset\uff0c\u83b7\u53d6old\uff08\u6b64\u65f6\u8fd9\u4e2a\u503c\u662fb\u521a\u521aset\u8fdb\u53bb\u7684\uff09\uff0c\u5224\u65ad\u672a\u8d85\u65f6\uff0cc\u7ee7\u7eed\u7b49\u5f85\u3002b\u7ebf\u7a0bdelete a\u7ebf\u7a0b\u7684\u9501\uff0c\u5e76\u4e14setnx\u540e\u3002\u8fd9\u79cd\u60c5\u51b5\u662f\u5b89\u5168\u7684\u3002<\/p>\n<p>\u9700\u8981\u6ce8\u610f\u7684\u5730\u65b9\uff1a<br \/> \u2460\u4e0d\u8981\u8f7b\u6613\u5c06get\u548cgetset\u6df7\u7528\uff0c\u7b14\u8005\u8ba4\u4e3agetset\u5355\u72ec\u4f7f\u7528\u6bd4\u8f83\u597d\u3002<br \/> \u6709\u4e00\u79cd\u60c5\u51b5\uff0ca\u3001b\u3001c\u3001\u4e09\u4e2a\u7ebf\u7a0b\uff0ca\u3001b\u540c\u65f6get\uff0ca\u7acb\u5373\u8fd4\u56de\u4e86old\uff0c\u7a81\u7136\u6765\u4e86\u4e2ac\uff0c\u5361\u5728b\u4e4b\u524dgetset\u4e86\uff0c\u4e14\u5220\u9664\u9501\uff0c\u90a3\u4e48b\u7684get\u53ea\u80fd\u8fd4\u56denil\u4e86\u3002\u6b64\u65f6\u518d\u6839\u636e\u65f6\u95f4\u6233\u5bf9\u6bd4\uff1a<br \/> a.get != (a.set)<br \/> b.get ! = (b.set)<br \/> \u8fd9\u6837a\u3001b\u90fd\u6ca1\u62ff\u5230\u9501\uff0c\u4f46\u662fa\u5176\u5b9e\u5df2\u7ecf\u83b7\u53d6\u5230\u4e86\u9501\u3002<br \/> \u2461\u591a\u4e2a\u670d\u52a1\u5668\u65f6\u95f4\u7684\u540c\u6b65\u95ee\u9898\u3002<\/p>\n<p>\u603b\u7ed3\uff1a \u9501\u8d85\u65f6\u4e86\u8be5\u5982\u4f55\u5904\u7406\uff0c\u901a\u8fc7getset\u65b9\u5f0f\u5224\u65ad\u65f6\u95f4\u6233\u5dee\u7684\u65b9\u5f0f\uff0c\u591a\u6bd4\u540c\u65f6getset\u90fd\u5f97\u5230\u8d85\u65f6\uff0c\u540c\u65f6\u53bbsetnx\u3002\u603b\u4f1a\u6709\u4e00\u4e2a\u66f4\u5feb\u5730\u53bbsetnx\u3002<\/p>\n<h2>\u4e8c\u3001\u901a\u8fc7incr\u62a2\u5360\u8d44\u6e90\u5b9e\u73b0<br \/><\/h2>\n<h3>1\u3001incr<br \/><\/h3>\n<p>\u5c06 key \u4e2d\u50a8\u5b58\u7684\u6570\u5b57\u503c\u589e\u4e00\u3002\u5982\u679c key \u4e0d\u5b58\u5728\uff0c\u90a3\u4e48 key \u7684\u503c\u4f1a\u5148\u88ab\u521d\u59cb\u5316\u4e3a 0 \uff0c\u7136\u540e\u518d\u6267\u884c INCR \u64cd\u4f5c\u3002\u5982\u679c\u503c\u5305\u542b\u9519\u8bef\u7684\u7c7b\u578b\uff0c\u6216\u5b57\u7b26\u4e32\u7c7b\u578b\u7684\u503c\u4e0d\u80fd\u8868\u793a\u4e3a\u6570\u5b57\uff0c\u90a3\u4e48\u8fd4\u56de\u4e00\u4e2a\u9519\u8bef\u3002<\/p>\n<pre>\npublic static Long incr(final String key) {\n        return shardedClient.execute(new ShardedJedisAction\n   \n    () {\n            @Override\n            public Long doAction(ShardedJedis shardedJedis) {\n                shardedJedis.expire(key, 200);\n                return shardedJedis.incr(key);\n            }\n        });\n    }\n   <\/pre>\n<p>\u8fd8\u662f\u4e0a\u9762\u7684\u4e09\u8981\u7d20\u7684\u4f8b\u5b50<\/p>\n<pre>\nLong result = RedisUtils.incr(\"LOCK_KEY_phone&amp;idNo&amp;name\");\n        if (result &gt; 1) {\n            \/\/\u5982\u679c\u8ba1\u6570\u5668&gt;1,\u8bf4\u660e\u5df2\u7ecf\u6709\u8bf7\u6c42\u8fdb\u6765\n            throw new AppException(ResponseCode.FAIL.getCode(), \"\u64cd\u4f5c\u9891\u7e41\");\n        }\n\n\n JSONObject result = A.request(B);\n Long endTime = System.currentTimeMillis();\n Long time = endTime - startTime;\n  \/\/\u5982\u679c\u5904\u7406\u65f6\u95f4\u5927\u4e8eincr\u7684key\u5b58\u6d3b\u65f6\u95f4,\u8bf4\u660e\u8be5\u7b14\u8bf7\u6c42\u5df2\u7ecf\u8d85\u65f6\n  if (time &gt; 200) {\n      \/\/\u5168\u5c40ID,\u7edf\u8ba1\u8d85\u65f6\u6b21\u6570\n      String key = \"LOCK_KEY_phone&amp;idNo&amp;name\" + source;\n      RedisUtils.incr(key);\n      int total = Integer.valueOf(RedisUtils.get(key));\n      \/\/\u65ad\u8a00\u82e5\u8d85\u65f610\u6b21,\u8fdb\u884c\u62a5\u8b66(\u62a5\u8b66\u4e0d\u5728\u6b21\u5c55\u5f00)\n      AssertUtils.isTrue(total \n\n<p>\u8fd9\u91cc\u8bbe\u7f6e\u4e86\u8ba1\u6570\u5668\u7684\u8d85\u65f6\u65f6\u95f4\u4e3a200ms\uff0c\u5982\u679c\u8bf7\u6c42\u8d85\u65f6\uff0c\u4f1a\u6709\u5927\u91cf\u7684\u7ebf\u7a0b\u540c\u65f6\u8bbf\u95ee\uff0c\u7b14\u8005\u8fd9\u91cc\u670910\u7b14\u540c\u65f6\u8fc7\u6765\uff0c\u5c31\u542f\u52a8\u62a5\u8b66\u3002\u4eba\u4e3a\u6392\u67e5\u6e20\u9053\u3002\u548csetnx\u7684\u4e0d\u540c\u662f\uff0c\u67d0\u4e2a\u7ebf\u7a0b\u8d85\u65f6\uff0csetnx\u7684\u65b9\u5f0f\u9700\u8981\u624b\u52a8\u53bb\u5224\u65ad\uff0c\u518d\u53bb\u52a0\u9501\uff0c\u9632\u6b62\u5927\u91cf\u7ebf\u7a0b\u8fdb\u5165(\u8fd9\u91cc\u53ef\u4ee5\u901a\u8fc7\u8f6e\u8bad\u5b9e\u73b0)\uff1b\u800cincr\u7684\u65b9\u5f0f\u8d85\u65f6\u4e86\uff0c\u5927\u91cf\u7ebf\u7a0b\u8fdb\u6765\uff0c\u6211\u4e0d\u505a\u5904\u7406\uff0c\u4f46\u662f\u8fd9\u91cc\u7684time&gt;200\u662f\u5177\u6709\u8bef\u5dee\u7684\u3002<br><\/p>\n<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>Redis\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501(setn&#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-201349","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/201349","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=201349"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/201349\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=201349"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=201349"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=201349"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}