{"id":201653,"date":"2025-05-10T10:18:47","date_gmt":"2025-05-10T02:18:47","guid":{"rendered":"https:\/\/server.hk\/cnblog\/201653\/"},"modified":"2025-05-10T10:18:47","modified_gmt":"2025-05-10T02:18:47","slug":"redis%e5%ae%9e%e7%8e%b0%e5%88%86%e5%b8%83%e5%bc%8f%e9%94%81%e7%9a%84%e5%87%a0%e7%a7%8d%e6%96%b9%e6%a1%88","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/201653\/","title":{"rendered":"Redis\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u7684\u51e0\u79cd\u65b9\u6848"},"content":{"rendered":"

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

Redis\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u7684\u51e0\u79cd\u65b9\u6848<\/h1>\n

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

\u6b22\u8fce\u5404\u4f4d\u5c0f\u4f19\u4f34\u6765\u5230golang\u5b66\u4e60\u7f51\uff0c\u76f8\u805a\u4e8e\u6b64\u90fd\u662f\u7f18\u54c8\u54c8\u54c8\uff01\u4eca\u5929\u6211\u7ed9\u5927\u5bb6\u5e26\u6765\u300aRedis\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u7684\u51e0\u79cd\u65b9\u6848\u300b<\/span>\uff0c\u8fd9\u7bc7\u6587\u7ae0\u4e3b\u8981\u8bb2\u5230\u5206\u5e03\u5f0f\u3001Redis\u3001\u9501<\/span>\u7b49\u7b49\u77e5\u8bc6\uff0c\u5982\u679c\u4f60\u5bf9\u6570\u636e\u5e93<\/span>\u76f8\u5173\u7684\u77e5\u8bc6\u975e\u5e38\u611f\u5174\u8da3\u6216\u8005\u6b63\u5728\u81ea\u5b66\uff0c\u90fd\u53ef\u4ee5\u5173\u6ce8\u6211\uff0c\u6211\u4f1a\u6301\u7eed\u66f4\u65b0\u76f8\u5173\u6587\u7ae0\uff01\u5f53\u7136\uff0c\u6709\u4ec0\u4e48\u5efa\u8bae\u4e5f\u6b22\u8fce\u5728\u8bc4\u8bba\u7559\u8a00\u63d0\u51fa\uff01\u4e00\u8d77\u5b66\u4e60\uff01<\/p>\n

1.\u524d\u8a00<\/h3>\n

\u5bf9\u4e8eRedis\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u7684\u51e0\u79cd\u65b9\u6848\u8fd9\u4e2a\u8bdd\u9898\uff0c\u5c55\u5f00\u4e4b\u524d\u6211\u60f3\u5148\u7b80\u5355\u804a\u804a\u4ec0\u4e48\u662f\u5206\u5e03\u5f0f\u9501\uff0c\u5206\u5e03\u5f0f\u9501\u7684\u4f7f\u7528\u573a\u666f\uff0c\u9664\u4e86Redis\u5916\u8fd8\u6709\u4ec0\u4e48\u6280\u672f\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u7b49\u4e00\u7cfb\u5217\u5185\u5bb9\u3002<\/p>\n

1.1\u5206\u5e03\u5f0f\u9501<\/h4>\n

\u8bf4\u5927\u4e00\u70b9\uff0c\u5c31\u662f\u5728\u73b0\u5728\u53d1\u5c55\u8d8a\u6765\u8d8a\u8fc5\u901f\u7684\u5927\u80cc\u666f\u4e0b\uff0c\u53bb\u4e2d\u5fc3\u5316\u5206\u5e03\u5f0f\u7cfb\u7edf\u8d8a\u6765\u8d8a\u666e\u53ca\uff0c\u5728\u6211\u4eec\u5b9e\u9645\u7684\u751f\u4ea7\u5f00\u53d1\u5f53\u4e2d\uff0c\u6709\u4e00\u79cd\u4e0d\u53ef\u907f\u514d\u7684\u573a\u666f\u5c31\u662f\u591a\u4e2a\u8fdb\u7a0b\u4e92\u65a5\u7684\u5bf9\u5176\u8d44\u6e90\u7684\u4f7f\u7528\uff0c\u4e3a\u4e86\u4fdd\u8bc1\u6570\u636e\u4e0d\u91cd\u590d\uff0c\u8981\u6c42\u5728\u540c\u4e00\u65f6\u523b\uff0c\u540c\u4e00\u4efb\u52a1\u53ea\u5728\u4e00\u4e2a\u8282\u70b9\u4e0a\u8fd0\u884c\uff0c\u4e14\u4fdd\u8bc1\u5728\u591a\u8fdb\u7a0b\u4e0b\u7684\u6570\u636e\u5b89\u5168\uff0c\u5206\u5e03\u5f0f\u9501\u5c31\u5341\u5206\u91cd\u8981\u4e86\u3002<\/p>\n

1.2\u5206\u5e03\u5f0f\u9501\u7684\u51e0\u79cd\u65b9\u6848<\/h4>\n

\u65b9\u5f0f\u6709\u5f88\u591a\u79cd\uff0c\u6839\u636e\u6280\u672f\u89d2\u5ea6\u7684\u4e0d\u540c<\/p>\n

\u6709\u57fa\u4e8eMySQL\u7684\u65b9\u5f0f\uff0c\u901a\u8fc7\u8868\u7684\u552f\u4e00\u7d22\u5f15\uff0c\u901a\u8fc7insert\u548cdelete\u5c31\u53ef\u4ee5\u5b9e\u73b0\u52a0\u9501\u548c\u89e3\u9501\u7684\u6548\u679c\uff1b<\/p>\n

\u6709\u57fa\u4e8ezookeeper\u7684\u65b9\u5f0f\uff0c\u901a\u8fc7\u521b\u5efa\u4e34\u65f6\u6709\u5e8f\u8282\u70b9\uff0c\u5224\u65ad\u521b\u5efa\u7684\u8282\u70b9\u5e8f\u53f7\u662f\u5426\u6700\u5c0f\u3002\u82e5\u662f\uff0c\u5219\u8868\u793a\u83b7\u53d6\u5230\u9501\uff0c\u4e0d\u662f\uff0c\u5219watch \/lock\u76ee\u5f55\u4e0b\u5e8f\u53f7\u6bd4\u81ea\u8eab\u5c0f\u7684\u524d\u4e00\u4e2a\u8282\u70b9\uff0c\u89e3\u9501\u53ea\u9700\u8981\u5220\u9664\u8282\u70b9\uff1b<\/p>\n

\u6709\u57fa\u4e8eRedis\u7684\u65b9\u5f0f\u3002\u901a\u8fc7\u6267\u884csetnx\uff0c\u82e5\u6210\u529f\u518d\u6267\u884cexpire\u6dfb\u52a0\u8fc7\u671f\u65f6\u95f4\u7684\u65b9\u5f0f\u52a0\u9501\uff0c\u89e3\u9501\u6267\u884cdelete\u547d\u4ee4\u3002<\/p>\n

\u65b9\u5f0f\u6709\u5f88\u591a\uff0c\u4e0d\u4e00\u4e00\u5217\u4e3e\u4e86\u3002<\/p>\n

1.3Redis\u5206\u5e03\u5f0f\u9501\u9700\u8981\u6ee1\u8db3\u7684\u6761\u4ef6<\/h4>\n
    \n
  • \u4e92\u65a5\u6027\u3002\u5728\u4efb\u610f\u65f6\u523b\uff0c\u53ea\u6709\u4e00\u4e2a\u5ba2\u6237\u7aef\u80fd\u6301\u6709\u9501\u3002<\/li>\n
  • \u4e0d\u53d1\u751f\u6b7b\u9501\u3002\u5373\u4f7f\u6709\u4e00\u4e2a\u5ba2\u6237\u7aef\u5728\u6301\u6709\u9501\u7684\u671f\u95f4\u5d29\u6e83\u800c\u6ca1\u6709\u4e3b\u52a8\u89e3\u9501\u4e5f\u80fd\u4fdd\u8bc1\u540e\u7eed\u5176\u4ed6\u5ba2\u6237\u7aef\u80fd\u52a0\u9501\u3002<\/li>\n
  • \u540c\u4e00\u6027\u3002\u52a0\u9501\u548c\u89e3\u9501\u5fc5\u987b\u662f\u540c\u4e00\u4e2a\u5ba2\u6237\u7aef\uff0c\u5ba2\u6237\u7aef\u81ea\u5df1\u4e0d\u80fd\u628a\u522b\u4eba\u52a0\u7684\u9501\u7ed9\u89e3\u4e86\uff0c\u5373\u4e0d\u80fd\u8bef\u89e3\u9501\u3002<\/li>\n
  • \u5bb9\u9519\u6027\u3002\u53ea\u8981\u5927\u591a\u6570Redis\u8282\u70b9\u6b63\u5e38\u8fd0\u884c\uff0c\u5ba2\u6237\u7aef\u5c31\u80fd\u591f\u83b7\u53d6\u548c\u91ca\u653e\u9501\u3002<\/li>\n<\/ul>\n

    2.Redis\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u7684\u51e0\u79cd\u65b9\u6848<\/h3>\n

    \u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u65b9\u5f0f\u5b9e\u73b0\uff08\u5305\u62ec\u4f46\u4e0d\u9650\u4e8e\uff09\uff1a<\/p>\n

      \n
    • SETNX + EXPIRE<\/li>\n
    • SETNX + value\uff08\u7cfb\u7edf\u65f6\u95f4+\u8fc7\u671f\u65f6\u95f4\uff09<\/li>\n
    • \u901a\u8fc7\u5f00\u6e90\u6846\u67b6-Redisson<\/li>\n<\/ul>\n

      \u7b80\u5355\u6765\u8bf4\u8bf4\uff0c\u7528Java\u4ee3\u7801\u6f14\u793a\uff1a<\/p>\n

      2.1 SETNX + EXPIRE<\/h4>\n

      setnx\uff08SET IF NOT EXISTS\uff09+ expire\u547d\u4ee4\u3002\u5148\u7528setnx\u6765\u62a2\u9501\uff0c\u5982\u679c\u62a2\u5230\u9501\uff0c\u518d\u7528expire\u7ed9\u9501\u8bbe\u7f6e\u4e00\u4e2a\u8fc7\u671f\u65f6\u95f4\uff0c\u8fd9\u6837\u6301\u6709\u9501\u8d85\u65f6\u65f6\u91ca\u653e\u9501\uff0c\u9632\u6b62\u9501\u5fd8\u8bb0\u91ca\u653e\u3002\u4f46\u6b64\u65f6setnx\u548cexpire\u4e24\u4e2a\u547d\u4ee4\u65e0\u6cd5\u4fdd\u8bc1\u539f\u5b50\u6027\uff0c\u4f8b\u5982\uff1a<\/p>\n

      if\uff08jedis.setnx(key_resource_id,lock_value) == 1\uff09{ \/\/\u52a0\u9501
      expire\uff08key_resource_id\uff0c100\uff09; \/\/\u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4
      try {
      \/\/\u4e1a\u52a1\u4ee3\u7801\u5757
      }catch() {
      }finally {
      jedis.del(key_resource_id); \/\/\u91ca\u653e\u9501
      }
      }<\/p>\n

      2.2 SETNX + value\uff08\u7cfb\u7edf\u65f6\u95f4+\u8fc7\u671f\u65f6\u95f4\uff09<\/h4>\n

      \u53ef\u4ee5\u628a\u8fc7\u671f\u65f6\u95f4\u653e\u5230setnx\u7684value\u503c\u91cc\u9762\u3002\u5982\u679c\u52a0\u9501\u5931\u8d25\uff0c\u518d\u62ff\u51favalue\u503c\u6821\u9a8c\u4e00\u4e0b\u5373\u53ef\u3002\u52a0\u9501\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n

      long expires = System.currentTimeMillis() + expireTime; \/\/\u7cfb\u7edf\u65f6\u95f4+\u8bbe\u7f6e\u7684\u8fc7\u671f\u65f6\u95f4
      String expiresStr = String.valueOf(expires);
      \/\/ \u5982\u679c\u5f53\u524d\u9501\u4e0d\u5b58\u5728\uff0c\u5219\u52a0\u9501\u6210\u529f
      if (jedis.setnx(key_resource_id, expiresStr) == 1) {
      return true;
      }
      \/\/ \u5982\u679c\u9501\u5df2\u7ecf\u5b58\u5728\uff0c\u83b7\u53d6\u9501\u7684\u8fc7\u671f\u65f6\u95f4
      String currentValueStr = jedis.get(key_resource_id);<\/p>\n

      \/\/ \u5982\u679c\u83b7\u53d6\u5230\u7684\u8fc7\u671f\u65f6\u95f4\uff0c\u5c0f\u4e8e\u7cfb\u7edf\u5f53\u524d\u65f6\u95f4\uff0c\u8868\u793a\u5df2\u7ecf\u8fc7\u671f
      if (currentValueStr != null && Long.parseLong(currentValueStr) \/\/ \u9501\u5df2\u8fc7\u671f\uff0c\u83b7\u53d6\u4e0a\u4e00\u4e2a\u9501\u7684\u8fc7\u671f\u65f6\u95f4\uff0c\u5e76\u8bbe\u7f6e\u73b0\u5728\u9501\u7684\u8fc7\u671f\u65f6\u95f4
      String oldValueStr = jedis.getSet(key_resource_id, expiresStr);
      if (oldValueStr != null && oldValueStr.equals(currentValueStr)) {
      \/\/ \u8003\u8651\u591a\u7ebf\u7a0b\u5e76\u53d1\u7684\u60c5\u51b5\uff0c\u53ea\u6709\u4e00\u4e2a\u7ebf\u7a0b\u7684\u8bbe\u7f6e\u503c\u548c\u5f53\u524d\u503c\u76f8\u540c\uff0c\u5b83\u624d\u53ef\u4ee5\u52a0\u9501
      return true;
      }
      }
      \/\/\u5176\u4ed6\u60c5\u51b5\u5747\u8fd4\u56de\u52a0\u9501\u5931\u8d25
      return false;<\/p>\n

      2.3 \u901a\u8fc7\u5f00\u6e90\u6846\u67b6-Redisson<\/h4>\n

      \u90a3\u4e48\u6b64\u65f6\u5c31\u8981\u53bb\u60f3\u4e86\uff0c\u5982\u679c\u5df2\u7ecf\u8d85\u8fc7\u4e86\u52a0\u9501\u7684\u8fc7\u671f\u65f6\u95f4\uff0c\u53ef\u662f\u4e1a\u52a1\u8fd8\u6ca1\u6267\u884c\u5b8c\u6210\uff0c\u8fd9\u4e2a\u65f6\u5019\u600e\u4e48\u505a\u5462\uff1f\u662f\u628a\u8fc7\u671f\u65f6\u95f4\u5ef6\u957f\u5417\uff1f\u663e\u7136\u4e0d\u5408\u7406\uff0c\u53ef\u4ee5\u901a\u8fc7\u5f00\u6e90\u6846\u67b6-Redisson\u4f18\u5316\u8fd9\u4e2a\u95ee\u9898\uff0c\u7b80\u5355\u6765\u8bf4\uff0cRedisson\u5c31\u662f\u5f53\u4e00\u4e2a\u7ebf\u7a0b\u83b7\u5f97\u9501\u4ee5\u540e\uff0c\u7ed9\u8be5\u7ebf\u7a0b\u5f00\u542f\u4e00\u4e2a\u5b9a\u65f6\u5b88\u62a4\u7ebf\u7a0b\uff0c\u6bcf\u9694\u4e00\u6bb5\u65f6\u95f4\u68c0\u67e5\u9501\u662f\u5426\u8fd8\u5b58\u5728\uff0c\u5b58\u5728\u5219\u5bf9\u9501\u7684\u8fc7\u671f\u65f6\u95f4\u5ef6\u957f\uff0c\u9632\u6b62\u9501\u8fc7\u671f\u63d0\u524d\u91ca\u653e\u3002\u5047\u8bbe\u4e24\u4e2a\u7ebf\u7a0b\u4e89\u593a\u7edf\u4e00\u516c\u5171\u8d44\u6e90\uff1a\u7ebf\u7a0bA\u83b7\u53d6\u9501\uff0c\u5e76\u901a\u8fc7\u54c8\u5e0c\u7b97\u6cd5\u9009\u62e9\u8282\u70b9\uff0c\u6267\u884cLua\u811a\u672c\u52a0\u9501\uff0c\u540c\u65f6\u5176\u770b\u95e8\u72d7\u673a\u5236\u4f1a\u542f\u52a8\u4e00\u4e2awatch dog\uff08\u540e\u53f0\u7ebf\u7a0b\uff09\uff0c\u6bcf\u969410\u79d2\u68c0\u67e5\u7ebf\u7a0b\uff0c\u5982\u679c\u7ebf\u7a0bA\u8fd8\u6301\u6709\u9501\uff0c\u90a3\u4e48\u5c31\u4f1a\u4e0d\u65ad\u7684\u5ef6\u957f\u9501key\u7684\u751f\u5b58\u65f6\u95f4\u3002\u7ebf\u7a0bB\u83b7\u5f97\u9501\u5931\u8d25\uff0c\u5c31\u4f1a\u8ba2\u9605\u89e3\u9501\u6d88\u606f\uff0c\u5f53\u83b7\u53d6\u9501\u5230\u5269\u4f59\u8fc7\u671f\u65f6\u95f4\u540e\uff0c\u8c03\u7528\u4fe1\u53f7\u91cf\u65b9\u6cd5\u963b\u585e\u4f4f\uff0c\u76f4\u5230\u88ab\u5524\u9192\u6216\u7b49\u5f85\u8d85\u65f6\u3002\u4e00\u65e6\u7ebf\u7a0bA\u91ca\u653e\u4e86\u9501\uff0c\u5c31\u4f1a\u5e7f\u64ad\u89e3\u9501\u6d88\u606f\u3002\u4e8e\u662f\uff0c\u89e3\u9501\u6d88\u606f\u7684\u76d1\u542c\u5668\u4f1a\u91ca\u653e\u4fe1\u53f7\u91cf\uff0c\u83b7\u53d6\u9501\u88ab\u963b\u585e\u7684\u7ebf\u7a0bB\u5c31\u4f1a\u88ab\u5524\u9192\uff0c\u5e76\u91cd\u65b0\u5c1d\u8bd5\u83b7\u53d6\u9501\u3002<\/p>\n

      Redisson \u652f\u6301\u5355\u70b9\u6a21\u5f0f\u3001\u4e3b\u4ece\u6a21\u5f0f\u3001\u54e8\u5175\u6a21\u5f0f\u3001\u96c6\u7fa4\u6a21\u5f0f\uff0c\u5047\u8bbe\u73b0\u4e3a\u5355\u70b9\u6a21\u5f0f\uff1a<\/p>\n

      \/\/\u6784\u9020Config
      Config config = new Config();
      config.useSingleServer().setAddress(“redis:\/\/ip:port”).setPassword(“Password.~#”).setDatabase(0);
      \/\/\u6784\u9020RedissonClient
      RedissonClient redissonClient = Redisson.create(config);
      \/\/\u83b7\u53d6\u9501\u5b9e\u4f8b
      RLock rLock = redissonClient.getLock(lockKey);
      try {
      \/\/\u83b7\u53d6\u9501,waitTimeout\u4e3a\u6700\u5927\u7b49\u5f85\u65f6\u95f4\uff0c\u8d85\u8fc7\u8fd9\u4e2a\u503c\uff0c\u5219\u8ba4\u4e3a\u83b7\u53d6\u9501\u5931\u8d25\u3002leaseTime\u4e3a\u9501\u7684\u6301\u6709\u65f6\u95f4
      boolean res = rLock.tryLock((long)waitTimeout, (long)leaseTime, TimeUnit.SECONDS);
      if (res) {
      \/\/\u4e1a\u52a1\u5757
      }
      } catch (Exception e) {
      }finally{
      \/\/\u89e3\u9501
      rLock.unlock();
      }<\/p>\n

      3.\u5c0f\u7ed3<\/h3>\n

      Redis\u7684\u5206\u5e03\u5f0f\u9501\u5b9e\u73b0\u65b9\u5f0f\u6709\u5f88\u591a\uff0c\u8fd9\u91cc\u4e0d\u4e00\u4e00\u5217\u4e3e\u4e86\uff0c\u6709\u673a\u4f1a\u518d\u5c55\u5f00Lua\u811a\u672c\u3001\u5206\u5e03\u5f0f\u9501Redlock\u7b49\u5185\u5bb9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

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