{"id":1797,"date":"2023-06-19T18:08:09","date_gmt":"2023-06-19T10:08:09","guid":{"rendered":"https:\/\/xinchewhd.com.cn\/?p=1797"},"modified":"2023-06-19T18:08:09","modified_gmt":"2023-06-19T10:08:09","slug":"%e5%b8%b8%e8%a7%81%e7%9a%84%e5%88%86%e5%b8%83%e5%bc%8f%e9%94%81%e8%a7%a3%e5%86%b3%e6%96%b9%e6%a1%88","status":"publish","type":"post","link":"https:\/\/xinchewhd.com.cn\/index.php\/uncategorized\/%e5%b8%b8%e8%a7%81%e7%9a%84%e5%88%86%e5%b8%83%e5%bc%8f%e9%94%81%e8%a7%a3%e5%86%b3%e6%96%b9%e6%a1%88\/","title":{"rendered":"\u5e38\u89c1\u7684\u5206\u5e03\u5f0f\u9501\u89e3\u51b3\u65b9\u6848"},"content":{"rendered":"
\n
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\n

\u6587\u4e2d\u7684\u4ee3\u7801\u4e0d\u5b8c\u6574\uff0c\u53ea\u662f\u4e2a\u5927\u6982\uff0c\u505a\u4e2a\u4e86\u89e3\u5c31\u53ef\u4ee5\u4e86\uff01<\/p>\n<\/section>\n<\/blockquote>\n

   
<\/p>\n

\u5206\u5e03\u5f0f\u9501\u5728\u6211\u4eec\u7684\u5f00\u53d1\u8fc7\u7a0b\u4e2d\u662f\u5341\u5206\u5e38\u89c1\u7684\u6280\u672f\uff0c\u901a\u8fc7\u6765\u8bf4\u6211\u4eec\u4f1a\u91c7\u7528mysql\u3001redis\u3001zk\u7b49\u624b\u6bb5\u53bb\u505a\u5206\u5e03\u5f0f\u9501\uff0c\u672c\u6b21\u4e3b\u8981\u4ecb\u7ecdmysql\u548credis\u5b9e\u73b0\u7684\u65b9\u5f0f\uff0c\u56e0\u4e3azk\u6211\u4e0d\u719f\u3002<\/p>\n

<\/mp-common-sticker><\/section>\n

mysql<\/span><\/span><\/h2>\n

    \u4f7f\u7528mysql\u505a\u5206\u5e03\u5f0f\u9501\u6709\u4ee5\u4e0b\u7684\u65b9\u5f0f\uff1a<\/p>\n

    \n
  1. \n
    \u5efa\u7acb\u4e00\u5f20\u8868\u8bb0\u5f55\u5bf9\u5e94\u7684\u65b9\u6cd5\uff0c\u5e76\u4e14\u4f7f\u7528\u552f\u4e00\u7d22\u5f15<\/section>\n<\/li>\n<\/ol>\n

        \u5148\u8bd5\u56fe\u63d2\u5165\u8be5\u8868\u4e2d\uff0c\u5982\u679c\u80fd\u591f\u6267\u884c\u6210\u529f\u5219\u4ee3\u8868\u83b7\u53d6\u5230\u9501\uff0c\u6267\u884c\u5931\u8d25\u5219\u81ea\u65cb\u76f4\u81f3\u83b7\u53d6\u9501 \u903b\u8f91\u64cd\u4f5c\u5b8c\u6210\u4e4b\u540e\uff0c\u5220\u9664\u5bf9\u5e94\u7684\u6570\u636e<\/p>\n

      \n
    1. \n
      \u4f7f\u7528Mysql\u81ea\u5e26\u7684\u6392\u5b83\u9501 select for update\u8bed\u53e5<\/section>\n<\/li>\n<\/ol>\n

          \u540c\u6837\u9700\u8981\u4e00\u5f20\u8868\uff0c\u5e76\u4e14\u8868\u4e2d\u521d\u59cb\u5316\u9700\u8981\u9501\u7684\u8d44\u6e90 \u4f7f\u7528select xxx from table where xxx=xxx for update\u67e5\u8be2 \u5e76\u4e14\u8bbe\u7f6e\u8d85\u65f6\u65f6\u95f4\uff0c\u907f\u514d\u957f\u65f6\u95f4\u6301\u6709\u9501 \u5982\u679c\u83b7\u53d6\u8d44\u6e90\u5219\u4ee3\u8868\u83b7\u53d6\u9501 \u65e0\u8bba\u662f\u5426\u6210\u529f\u83b7\u53d6\u5230\u9501\u90fd\u8981\u91ca\u653e\u6389\u8fde\u63a5<\/p>\n

       \/**
           * \uff08\u8fd9\u91cc\u53ea\u662f\u7b80\u5355\u4ecb\u7ecd\u4e00\u4e0b\uff0c\u5bf9\u4e8e\u4e0a\u8ff0\u65b9\u6848\u53ef\u4ee5\u8fdb\u884c\u4f18\u5316\uff0c\u5982\uff1a\u5e94\u7528\u4e3b\u4ece\u6570\u636e\u5e93\uff0c\u6570\u636e\u4e4b\u95f4\u53cc\u5411\u540c\u6b65\uff1b\u4e00\u65e6\u6302\u6389\u5feb\u901f\u5207\u6362\u5230\u5907\u5e93\u4e0a\uff1b\u505a\u4e00\u4e2a\u5b9a\u65f6\u4efb\u52a1\uff0c\u6bcf\u9694\u4e00\u5b9a\u65f6\u95f4\u628a\u6570\u636e\u5e93\u4e2d\u7684\u8d85\u65f6\u6570\u636e\u6e05\u7406\u4e00\u904d\uff1b
           * \u4f7f\u7528while\u5faa\u73af\uff0c\u76f4\u5230insert\u6210\u529f\u518d\u8fd4\u56de\u6210\u529f\uff1b\u8bb0\u5f55\u5f53\u524d\u83b7\u5f97\u9501\u7684\u673a\u5668\u7684\u4e3b\u673a\u4fe1\u606f\u548c\u7ebf\u7a0b\u4fe1\u606f\uff0c\u4e0b\u6b21\u518d\u83b7\u53d6\u9501\u7684\u65f6\u5019\u5148\u67e5\u8be2\u6570\u636e\u5e93
           * \u5982\u679c\u5f53\u524d\u673a\u5668\u7684\u4e3b\u673a\u4fe1\u606f\u548c\u7ebf\u7a0b\u4fe1\u606f\u5728\u6570\u636e\u5e93\u53ef\u4ee5\u67e5\u5230\u7684\u8bdd\uff0c\u76f4\u63a5\u628a\u9501\u5206\u914d\u7ed9\u4ed6\u5c31\u53ef\u4ee5\u4e86\uff0c\u5b9e\u73b0\u53ef\u91cd\u5165\u9501\uff09
           *
           * @throws<\/span> InterruptedException
           *\/<\/span>
          @RequestMapping<\/span>(\"\/lock\"<\/span>)
          public<\/span> void<\/span> lock<\/span>()<\/span> throws<\/span> InterruptedException <\/span>{

              String className = Thread.currentThread().getStackTrace()[1<\/span>].getClassName();
              String methodName = Thread.currentThread().getStackTrace()[1<\/span>].getMethodName();
              TestLock testLock = new<\/span> TestLock();
              testLock.setController(className);
              testLock.setMethod(methodName);
              testLock.setTime(new<\/span> Date());
              try<\/span> {
                  if<\/span> (testLockMapper.insert(testLock) > 0<\/span>) {
                      log.info(\"\u83b7\u53d6\u5230\u9501\"<\/span>);
                      Thread.sleep(10000<\/span>);
                      testLockMapper.deleteByCondition(className, methodName);
                      log.info(\"\u91ca\u653e\u9501\"<\/span>);
                  } else<\/span> {
                      log.info(\"\u83b7\u53d6\u4e0d\u5230\u9501\"<\/span>);
                  }
              } catch<\/span> (Exception e) {
                  log.info(\"\u83b7\u53d6\u4e0d\u5230\u9501\"<\/span>);
              }

          }

          \/**
           * \u52a0\u4e86\u6392\u4ed6\u9501\u4e4b\u540e\uff0c\u52a0\u4e86for update \u7684sql \u5c06\u4f1a\u963b\u585e\uff0c\u62ff\u5230\u9501\u4e4b\u540e\u7ee7\u7eed\u6267\u884c
           * \u963b\u585e\u65f6\u95f4\u662f\u5426\u6709\u9650\u5236\uff1f \u8fd9\u4e2a\u6ca1\u6709\u4e00\u4e2a \u8d85\u65f6\u65f6\u95f4\uff0c\u8fc7\u4e86\u8d85\u65f6\u65f6\u95f4\u5c31\u81ea\u52a8\u91ca\u653e\u9501
           * preparedStatement.setQueryTimeout(200);
           * \u521d\u6b65\u60f3\u6cd5\u662f\u8bbe\u7f6e\u4e00\u4e2a\u67e5\u8be2\u8d85\u65f6\u65f6\u95f4\uff0c\u4e2d\u65ad\u67e5\u8be2\uff0c\u67e5\u8be2\u4e0d\u5230\u5c31\u62ff\u4e0d\u5230\u9501\u5c31\u53ef\u4ee5\u6267\u884c\u5176\u4ed6\u7684\u903b\u8f91\uff0c\u5c31\u53ef\u4ee5\u4e0d\u7528\u4e00\u76f4\u963b\u585e\u3002
           * \u4f46\u662f\u4e0d\u751f\u6548\u3002
           *
           * @throws<\/span> SQLException
           * @throws<\/span> InterruptedException
           *\/<\/span>
          @RequestMapping<\/span>(\"\/mysqlLock\"<\/span>)
          public<\/span> void<\/span> mysqlLock<\/span>()<\/span> throws<\/span> SQLException, InterruptedException <\/span>{
              Connection connection = BeanUtils.source.getConnection();
              connection.setAutoCommit(false<\/span>);
              try<\/span> {
                  String sql = \"select * from test_lock where controller = 'lock' for update;\"<\/span>;
                  PreparedStatement preparedStatement = connection.prepareStatement(sql);
                  preparedStatement.setQueryTimeout(200<\/span>);

                  log.info(\"\u5f00\u59cb\u6267\u884csql\"<\/span>);
                  long<\/span> l = System.currentTimeMillis();
                  ResultSet resultSet = preparedStatement.executeQuery();
                  long<\/span> l1 = System.currentTimeMillis();
                  System.out.println(l1 - l);

                  log.info(\"sql\u6267\u884c\u5b8c\u6210\"<\/span>);
                  if<\/span> (resultSet.next()) {
                      \/\/\u4ee3\u8868\u83b7\u53d6\u5230\u9501<\/span>
                      log.info(\"\u83b7\u53d6\u5230\u9501\"<\/span>);

                      Thread.sleep(10000<\/span>);
                      log.info(\"\u5f00\u59cb\u6267\u884c\u4e1a\u52a1\"<\/span>);
                      connection.commit();
                      log.info(\"\u91ca\u653e\"<\/span>);
                      return<\/span>;
                  } else<\/span> {
                      log.info(\"\u83b7\u53d6\u4e0d\u5230\u9501\"<\/span>);
                  }
              } catch<\/span> (Exception e) {
                  connection.commit();
              }
          }
      <\/code><\/pre>\n
      redis\uff08\u6f14\u53d8\u8fc7\u7a0b\uff09<\/span><\/span><\/h2>\n
      \u5e38\u89c4\u505a\u6cd5<\/span><\/span><\/h2>\n
          \u6211\u4eec\u901a\u5e38\u4f7f\u7528redis+lua\u6765\u505a\u4e00\u4e2a\u5206\u5e03\u5f0f\u9501\uff0c\u4e3a\u4ec0\u4e48\u4f1a\u91c7\u7528\u8fd9\u79cd\u65b9\u6848\u6211\u4eec\u5e94\u8be5\u4e00\u6b65\u4e00\u6b65\u6765\u63a2\u8ba8\u4e00\u4e0b\u8fd9\u4e2a\u95ee\u9898<\/p>\n
        \n
      1. \n
        \u901a\u5e38\u903b\u8f91\u6765\u8bf4\u6211\u4eec\u662f\u8fd9\u6837\u5904\u7406\u7684\uff0c\u9996\u5148\u5c06\u9700\u8981\u505a\u4e92\u65a5\u64cd\u4f5c\u7684\u8d44\u6e90\u8fdb\u884csetnx\u64cd\u4f5c\uff0c\u5982\u679c\u5df2\u7ecf\u5b58\u5728\u4e86\u8fd9\u4e2a\u952e\u5219\u4e0d\u8bbe\u7f6e\uff0c\u5c31\u4f1a\u8fd4\u56de0\uff0c\u8868\u793a\u5f53\u524d\u8d44\u6e90\u5df2\u7ecf\u88ab\u5176\u4ed6\u7ebf\u7a0b\u5360\u7528\uff0c\u5982\u679c\u8bbe\u7f6e\u6210\u529f\uff0c\u8fd4\u56de\u7684\u662f1\uff0c\u8868\u793a\u5f53\u524d\u7ebf\u7a0b\u83b7\u53d6\u4e86\u9501\u3002\u7136\u540e\u6267\u884c\u64cd\u4f5c\uff0c\u6267\u884c\u64cd\u4f5c\u5b8c\u6210\u4e4b\u540e\u518d\u5220\u9664key\u3002<\/section>\n<\/li>\n
      2. \n
        \u5982\u679c\u6309\u7167\u4e0a\u9762\u505a\u6cd5\u7684\u8bdd\uff0c\u518d\u6267\u884c\u903b\u8f91\u64cd\u4f5c\u8fc7\u7a0b\u4e2d\u53d1\u751f\u4e2d\u65ad\uff0ckey\u6ca1\u6709\u7ed9\u5220\u6389\uff0c\u90a3\u4e48\u4ea7\u751f\u6b7b\u9501\uff0c\u6240\u4ee5\u81ea\u7136\u800c\u7136\u6211\u4eec\u5c31\u4f1a\u60f3\u5230\uff0c\u7ed9key\u6dfb\u52a0\u8fc7\u671f\u65f6\u95f4\uff0c\u4e5f\u5c31\u4f1a\u81ea\u7136\u800c\u8a00\u7684\uff0c\u4f46\u662fsetnx\u4e0d\u80fd\u8bbe\u7f6ekey\u7684\u8fc7\u671f\u65f6\u95f4\uff0c\u6240\u4ee5\u6211\u4eec\u5c31\u4f1a\u60f3\u5230\uff0c\u5728setn\u64cd\u4f5c\u5b8c\u6210\u4e4b\u540e \u4f7f\u7528expire\u547d\u4ee4\u7ed9key\u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4\u3002<\/section>\n<\/li>\n
      3. \n
        \u7b2c2\u70b9\u7684\u505a\u6cd5\u5982\u679c\u5728expire\u6267\u884c\u4e4b\u524d\u5c31\u4e2d\u65ad\u4e86\u7ebf\u7a0b\uff0c\u4f9d\u7136\u4f1a\u4ea7\u751f\u6b7b\u9501\uff0c\u90a3\u600e\u4e48\u529e\uff1f\u5176\u5b9e\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528set\u547d\u4ee4\uff0c\u5176\u4e2d\u6709\u4e2a\u65b9\u6cd5\u91cd\u8f7dSET key value [expiration EX seconds|PX milliseconds] [NX|XX]\uff0c\u8be5\u65b9\u6cd5\u91cd\u65b0\u65e2\u53ef\u4ee5\u5b9e\u73b0setnx\u7684\u6548\u679c\u4e5f\u53ef\u4ee5\u6dfb\u52a0\u8fc7\u671f\u65f6\u95f4<\/section>\n<\/li>\n<\/ol>\n
        \n
          \n
        • \n
          EX second\uff1a\u8bbe\u7f6e\u952e\u7684\u8fc7\u671f\u65f6\u95f4\u4e3a second \u79d2\u3002SET key value EX second \u6548\u679c\u7b49\u540c\u4e8e SETEX key second value\u3002<\/section>\n<\/li>\n
        • \n
          PX millisecond\uff1a\u8bbe\u7f6e\u952e\u7684\u8fc7\u671f\u65f6\u95f4\u4e3a\u6beb\u79d2\u3002SET key value PX millisecond \u6548\u679c\u7b49\u540c\u4e8e PSETEX key millisecond value\u3002<\/section>\n<\/li>\n
        • \n
          NX\uff1a\u53ea\u5728\u952e\u4e0d\u5b58\u5728\u65f6\uff0c\u624d\u5bf9\u952e\u8fdb\u884c\u8bbe\u7f6e\u64cd\u4f5c\u3002SET key value NX \u6548\u679c\u7b49\u540c\u4e8e SETNX key value\u3002<\/section>\n<\/li>\n
        • \n
          XX\uff1a\u53ea\u5728\u952e\u5df2\u7ecf\u5b58\u5728\u65f6\uff0c\u624d\u5bf9\u952e\u8fdb\u884c\u8bbe\u7f6e\u64cd\u4f5c<\/section>\n<\/li>\n<\/ul>\n<\/blockquote>\n

          <\/code>    \u6240\u4ee5\u6211<\/span>\u4eec\u4f7f\u7528set key value ex ttl nx \u6765\u8bbe\u7f6e\u503c\u5e76\u4e14\u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4\uff0c\u5982\u679c\u8bbe\u7f6e\u6210\u529f\u5219\u8868\u793a\u83b7\u53d6\u5230<\/span>\u9501\u3002<\/span><\/code>
          <\/span><\/code><\/p>\n
            \n
          1. \n
            \u5230\u8fd9\u91cc\u662f\u5426\u5c31\u6ca1\u6709\u95ee\u9898\u4e86\u5462\uff1f\u5176\u5b9e\u4e0d\u7136 \uff0c\u867d\u7136\u6211\u4eec\u8bbe\u7f6e\u4e86\u8fc7\u671f\u65f6\u95f4\uff0c\u4f46\u662f\u6211\u4eec\u5ffd\u7565\u7684\u4e1a\u52a1\u903b\u8f91\u6267\u884c\u7684\u65f6\u95f4 \u4e0e \u8fc7\u671f\u65f6\u95f4\u7684 \u4e4b\u95f4\u7684\u5173\u7cfb\u4e0a\u9762\u8bbe\u7f6e\u7684\u9501\u7684\u8fc7\u671f\u65f6\u95f4\u662f 5s, \u5982\u679c\u6211\u4eec\u7ebf\u7a0bA\u4e1a\u52a1\u903b\u8f91\u64cd\u4f5c\u65f6\u95f4\u662f10s\uff0c 5s\u4e4b\u540e\uff0c\u9501\u8fc7\u671f\u4e86\u81ea\u52a8\u91ca\u653e\u5728 5s \u540e \u7ebf\u7a0bB\u5c31\u53ef\u4ee5\u62ff\u5230\u8fd9\u628a\u9501 \uff0c\u7ebf\u7a0bB\u7684\u4e1a\u52a1\u903b\u8f91\u64cd\u4f5c\u65f6\u95f4\u4e5f\u662f10s, \u7b49\u7edd\u5bf9\u65f6\u95f4\u5230\u4e86 10s \u65f6\u5019\uff0c\u7ebf\u7a0bA\u6267\u884cdel\u64cd\u4f5c\u65f6\u91ca\u653e\u9501\uff0c\u8fd9\u65f6\u5019 \u7ebf\u7a0bA \u91ca\u653e\u7684\u662f\u7ebf\u7a0bB\u7684\u9501\u3002<\/section>\n<\/li>\n
          2. \n
            \u90a3\u4e48\u600e\u4e48\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff1f\u6211\u4eec\u53ef\u4ee5\u5c06\u662fkey\u7684\u503c\u8bbe\u7f6e\u6210\u5f53\u524d\u7ebf\u7a0b\u7684\u4fe1\u606f\uff0c\u6211\u4eec\u5220\u9664key\u4e4b\u524d\u5148\u5224\u65ad\u4e00\u4e0bkey\u7684\u503c\u662f\u4e0d\u662f\u5f53\u524d\u7ebf\u7a0b\uff0c\u4f46\u662f\u8fd9\u91cc\u67e5\u8be2\u548c\u5220\u9664\u4e0d\u662f\u539f\u5b50\u6027\uff0c\u4f9d\u7136\u4f1a\u6709\u95ee\u9898\u3002\u6240\u4ee5\u6211\u4eec\u9700\u8981lua\u811a\u672c\u53bb\u89e3\u51b3\u6211\u4eec\u7684\u539f\u5b50\u6027\u95ee\u9898\u3002\u5e76\u4e14\u6211\u4eec\u53ef\u4ee5\u5f00\u4e00\u4e2a\u5b50\u7ebf\u7a0b\u505a\u5b88\u62a4\u7ebf\u7a0b\uff0c\u5b9a\u65f6\u7684\u9694\u4e00\u6bb5\u65f6\u95f4\u53bb\u91cd\u7f6e\u8fc7\u671f\u65f6\u95f4\uff0c\u8fd9\u4e2a\u505a\u6cd5\u53eb\u505a\u9501\u7eed\u79df<\/section>\n<\/li>\n<\/ol>\n
                \u603b\u7ed3\u4e00\u4e0b\uff0c\u5206\u5e03\u5f0f\u9501\u6211\u4eec\u901a\u5e38\u4f7f\u7528set\u547d\u4ee4\u53bb\u8bbe\u7f6ekey\u548c\u8fc7\u671f\u65f6\u95f4\uff0c\u4f7f\u7528redis+lua\u53bb\u91ca\u653e\u9501\uff0c\u8fd8\u6709\u4e00\u79cd\u5b9e\u73b0\u662f\u57fa\u4e8esetnx,get,getset\u8fd9\u4e09\u4e2a\u547d\u4ee4\u7684\u53bb\u5b9e\u73b0\u7684\uff0c\u611f\u5174\u8da3\u53ef\u4ee5\u81ea\u5df1\u770b\u4e00\u4e0b\uff0c\u6838\u5fc3\u601d\u60f3\u5c31\u662f\u907f\u514d\u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4\uff0c\u76f4\u63a5\u5c06\u65f6\u95f4\u8bbe\u7f6e\u4e3avalue\u3002<\/p>\n
             @RequestMapping<\/span>(\"redisLock\"<\/span>)
                public<\/span> void<\/span> redisLock<\/span>()<\/span> throws<\/span> InterruptedException <\/span>{

                    \/**
                     * \u65b9\u6cd5\u4e00\u5b58\u5728\u95ee\u9898\uff1a
                     * 1\u3002\u5982\u679c\u5728setnx\u4e0e del \u64cd\u4f5c\u4e4b\u95f4 \u7a0b\u5e8f\u5f02\u5e38\u6216\u7ec8\u7aef\uff0c\u5c06\u4f1a\u5bfc\u81f4\u8fd9\u628a ? \u6c38\u8fdc\u90fd\u65e0\u6cd5\u91ca\u653e\uff0c\u5c06\u4f1a\u4ea7\u751f\u6b7b\u9501\u95ee\u9898\u3002
                     *\/<\/span>

                    \/\/\u65b9\u6cd5\u4e00<\/span>
                    if<\/span> (redisOperations.setnx(LOCK_IN_REDIS_PREFIX, VALUE_LOCK_IN_REDIS)) {
                        \/\/\u903b\u8f91\u64cd\u4f5c<\/span>
                        log.info(\"\u83b7\u53d6\u5230\u9501\"<\/span>);
                        log.info(\"\u5f00\u59cb\u6267\u884c\u4e1a\u52a1\"<\/span>);
                        Thread.sleep(5000<\/span>);
                        log.info(\"\u4e1a\u52a1\u6267\u884c\u7ed3\u675f\"<\/span>);
                        redisOperations.del(LOCK_IN_REDIS_PREFIX);
                        log.info(\"\u91ca\u653e\u9501\"<\/span>);
                    } else<\/span> {
                        log.info(\"\u83b7\u53d6\u4e0d\u5230\u9501\"<\/span>);
                    }

                    \/**
                     * \u9488\u5bf9\u65b9\u6cd5\u4e00\u4ea7\u751f\u7684\u6b7b\u9501\u95ee\u9898\uff0c\u53ef\u4ee5\u901a\u8fc7\u6dfb\u52a0\u8fc7\u671f\u65f6\u95f4\u6765\u5904\u7406\uff1a
                     * 1.\u901a\u8fc7expire\u6765\u4e3a\u8fd9\u4e2akey\u589e\u52a0\u8fc7\u671f\u65f6\u95f4
                     *
                     *\/<\/span>
                    boolean<\/span> setnx = redisOperations.setnx(LOCK_IN_REDIS_PREFIX, VALUE_LOCK_IN_REDIS);
                    if<\/span> (setnx) {
                        log.info(\"\u83b7\u53d6\u5230\u9501\"<\/span>);
                        log.info(\"\u5f00\u59cb\u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4\"<\/span>);
                        redisOperations.expire(LOCK_IN_REDIS_PREFIX, 30000<\/span>);
                        log.info(\"\u8fc7\u671f\u65f6\u95f4\u8bbe\u7f6e\u5b8c\u6210\"<\/span>);
                        log.info(\"\u5f00\u59cb\u6267\u884c\u4e1a\u52a1\"<\/span>);
                        Thread.sleep(4000<\/span>);
                        log.info(\"\u4e1a\u52a1\u6267\u884c\u5b8c\u6210\"<\/span>);
                        redisOperations.del(LOCK_IN_REDIS_PREFIX);
                        log.info(\"\u91ca\u653e\u9501\"<\/span>);
                    } else<\/span> {
                        log.info(\"\u83b7\u53d6\u4e0d\u5230\u9501\"<\/span>);
                    }
                    \/**
                     * \u4e0a\u9762\u8fd9\u79cd\u65b9\u6cd5\u8fd8\u662f\u4f1a\u6709\u95ee\u9898\u7684\uff0c\u56e0\u4e3a setnx\u548c expire \u6ca1\u6709\u539f\u5b50\u6027\uff0c\u6709\u53ef\u80fd\u6267\u884c\u4e86 setnx\u540e\u9762 \u7cfb\u7edf\u5f02\u5e38\u4e86\uff0c\u90a3\u4e48\u4f9d\u65e7\u8fd8\u662f\u4f1a\u4ea7\u751f\u6b7b\u9501\u7684\u73b0\u8c61
                     * \u6240\u4ee5\u8fd9\u4e2a\u65f6\u95f4\u5c31\u8981\u7528\u66f4\u6362\u601d\u8def\uff0c\u8981\u4fdd\u8bc1expire\u548c\u5176\u4ed6\u7684\u64cd\u4f5c\u662f\u539f\u5b50\u6027\u7684
                     * 2.\u91c7\u7528redis\u7684set\u547d\u4ee4  set\u547d\u4ee4\u652f\u6301\u5728\u83b7\u53d6\u9501\u7684\u540c\u65f6\u8bbe\u7f6ekey\u7684\u8fc7\u671f\u65f6\u95f4
                     *\/<\/span>
                    String set = redisOperations.set(LOCK_IN_REDIS_PREFIX, VALUE_LOCK_IN_REDIS, \"NX\"<\/span>, \"EX\"<\/span>, 5000<\/span>);
                    if<\/span> (!StringUtils.isEmpty(set)){
                        log.info(\"\u83b7\u53d6\u5230\u9501\"<\/span>);
                        log.info(\"\u5f00\u59cb\u6267\u884c\u4e1a\u52a1\"<\/span>);
                        Thread.sleep(5000<\/span>);
                        log.info(\"\u4e1a\u52a1\u6267\u884c\u5b8c\u6210\"<\/span>);
                        redisOperations.del(LOCK_IN_REDIS_PREFIX);
                        log.info(\"\u9501\u91ca\u653e\"<\/span>);
                    }else<\/span> {
                        log.info(\"\u83b7\u53d6\u4e0d\u5230\u9501\"<\/span>);
                    }

                    \/**
                     * \u5230\u8fd9\u91cc\u662f\u5426\u5c31\u6ca1\u6709\u95ee\u9898\u4e86\u5462\uff1f \u5176\u5b9e\u4e0d\u7136 \uff0c\u5c31\u4e0a\u9762\u8fd9\u6bb5\u7a0b\u5e8f\u800c\u8a00
                     * \u867d\u7136\u6211\u4eec\u8bbe\u7f6e\u4e86\u8fc7\u671f\u65f6\u95f4\uff0c\u4f46\u662f\u6211\u4eec\u5ffd\u7565\u7684\u4e1a\u52a1\u903b\u8f91\u6267\u884c\u7684\u65f6\u95f4 \u4e0e \u8fc7\u671f\u65f6\u95f4\u7684 \u4e4b\u95f4\u7684\u5173\u7cfb
                     * \u4e0a\u9762\u8bbe\u7f6e\u7684?\u7684\u8fc7\u671f\u65f6\u95f4\u662f 5s,  \u5982\u679c\u6211\u4eec\u7ebf\u7a0bA\u4e1a\u52a1\u903b\u8f91\u64cd\u4f5c\u65f6\u95f4\u662f10s\uff0c 5s\u4e4b\u540e\uff0c\u9501\u8fc7\u671f\u4e86\u81ea\u52a8\u91ca\u653e
                     * \u5728 5s \u540e \u7ebf\u7a0bB\u5c31\u53ef\u4ee5\u62ff\u5230\u8fd9\u628a\u9501 \uff0c\u7ebf\u7a0bB\u7684\u4e1a\u52a1\u903b\u8f91\u64cd\u4f5c\u65f6\u95f4\u4e5f\u662f10s,  \u7b49\u7edd\u5bf9\u65f6\u95f4\u5230\u4e86 10s \u65f6\u5019\uff0c
                     * \u7ebf\u7a0bA\u6267\u884cdel\u64cd\u4f5c\u65f6\u91ca\u653e\u9501\uff0c\u8fd9\u65f6\u5019 \u7ebf\u7a0bA \u91ca\u653e\u7684\u662f\u7ebf\u7a0bB\u7684\u9501
                     *\/<\/span>



                    \/**
                     * \u4e0a\u9762\u7684\u95ee\u9898\u53ef\u4ee5\u8fd9\u6837\u6765\u89e3\u51b3\uff1a
                     *      \u5c06\u5f53\u524d\u7ebf\u7a0b\u7684\u76f8\u5173\u4fe1\u606f\u8bbe\u7f6e\u6210\u503c\uff0c
                     *      \u5220\u9664\u4e4b\u524d\u5148\u5224\u65ad\u4e00\u4e0bvalue\u91cc\u9762\u7684\u7ebf\u7a0b\u4fe1\u606f\u662f\u5426\u662f\u5f53\u524d\u7ebf\u7a0b\u7684\u503c
                     * \u4f46\u662f\u8fd9\u6837get \u548c del \u4e0d\u5b58\u5728 \u539f\u5b50\u6027 \u53ef\u4ee5\u901a\u8fc7lua\u811a\u672c\u4fdd\u8bc1\u539f\u5b50\u6027
                     *\/<\/span>
                    String threadMsg = Thread.currentThread().getName();
                    String sets = redisOperations.set(LOCK_IN_REDIS_PREFIX, threadMsg, \"NX\"<\/span>, \"EX\"<\/span>, 5000<\/span>);
                    String script = \"--KEYS[1] string \u9501\u7684keyn\"<\/span> +
                            \"--ARGV[1] string \u5f53\u524d\u7ebf\u7a0b\u7684valuen\"<\/span> +
                            \"n\"<\/span> +
                            \"local valid_thread = ARGV[1] n\"<\/span> +
                            \"local current_thread = redis.call(\"get\",KEYS[1])n\"<\/span> +
                            \"if n\"<\/span> +
                            \"valid_thread == current_threadn\"<\/span> +
                            \"thenn\"<\/span> +
                            \"redis.call(\"del\",KEYS[1])n\"<\/span> +
                            \"end\"<\/span>;
                    if<\/span> (!StringUtils.isEmpty(sets)){
                        log.info(\"\u83b7\u53d6\u5230\u9501\"<\/span>);
                        log.info(\"\u5f00\u59cb\u6267\u884c\u4e1a\u52a1\"<\/span>);
                        Thread.sleep(5000<\/span>);
                        log.info(\"\u4e1a\u52a1\u6267\u884c\u5b8c\u6210\"<\/span>);
                        redisOperations.eval(script, Collections.singletonList(LOCK_IN_REDIS_PREFIX),Collections.singletonList(VALUE_LOCK_IN_REDIS));
                        log.info(\"\u9501\u91ca\u653e\"<\/span>);
                    }else<\/span> {
                        log.info(\"\u83b7\u53d6\u4e0d\u5230\u9501\"<\/span>);
                    }


                    \/**
                     * \u8fd8\u53ef\u4ee5\u901a\u8fc7\u9501\u7eed\u79df\u6765\u89e3\u51b3 \u5728\u83b7\u53d6\u5f97\u5230\u9501\u7684\u7ebf\u7a0b\u4e2d\u5f00\u542f\u4e00\u4e2a\u5b88\u62a4\u7ebf\u7a0b\u6ca1\u9694\u51e0\u79d2\u7eed\u79df\u4e00\u6b21
                     *\/<\/span>

                    String localThreadMsg = Thread.currentThread().getName();
                    String sets1 = redisOperations.set(LOCK_IN_REDIS_PREFIX, threadMsg, \"NX\"<\/span>, \"EX\"<\/span>, 5000<\/span>);
                    String script1 = \"--KEYS[1] string \u9501\u7684keyn\"<\/span> +
                            \"--ARGV[1] string \u5f53\u524d\u7ebf\u7a0b\u7684valuen\"<\/span> +
                            \"n\"<\/span> +
                            \"local valid_thread = ARGV[1] n\"<\/span> +
                            \"local current_thread = redis.call(\"get\",KEYS[1])n\"<\/span> +
                            \"if n\"<\/span> +
                            \"valid_thread == current_threadn\"<\/span> +
                            \"thenn\"<\/span> +
                            \"redis.call(\"del\",KEYS[1])n\"<\/span> +
                            \"end\"<\/span>;
                    if<\/span> (!StringUtils.isEmpty(sets)){
                        log.info(\"\u83b7\u53d6\u5230\u9501\"<\/span>);
                        log.info(\"\u5f00\u59cb\u6267\u884c\u4e1a\u52a1\"<\/span>);
                        Thread demon = new<\/span> Thread(()->{
                            long<\/span> start = System.currentTimeMillis();
                            while<\/span> (System.currentTimeMillis()-start >= 29000L<\/span>){
                                redisOperations.expire(LOCK_IN_REDIS_PREFIX,20<\/span>);
                                start = System.currentTimeMillis();
                            }
                        });
                        demon.run();
                        Thread.sleep(5000<\/span>);
                        log.info(\"\u4e1a\u52a1\u6267\u884c\u5b8c\u6210\"<\/span>);
                        redisOperations.eval(script, Collections.singletonList(LOCK_IN_REDIS_PREFIX),Collections.singletonList(VALUE_LOCK_IN_REDIS));
                        log.info(\"\u9501\u91ca\u653e\"<\/span>);
                    }else<\/span> {
                        log.info(\"\u83b7\u53d6\u4e0d\u5230\u9501\"<\/span>);
                    }

                }
            <\/code><\/pre>\n
                \u4e0a\u9762\u7684\u505a\u6cd5\u5f88\u597d\u89e3\u51b3\u7684\u5206\u5e03\u5f0f\u9501\u7684\u95ee\u9898\uff0c\u4f46\u662f\u6211\u4eec\u7684redis\u901a\u5e38\u90fd\u662f\u96c6\u7fa4\u5316\uff0c\u6211\u4eec\u8003\u8651\u4e00\u4e0b\u8fd9\u79cd\u60c5\u51b5 \u6211\u4eec\u77e5\u9053\u5728\u4e3b\u4ece\u67b6\u6784\u4e0bmaster\u8282\u70b9\u53ef\u4ee5\u8bfb\u5199\uff0cslave\u8282\u70b9\u53ea\u80fd\u8bfb\uff0cmaster\u901a\u8fc7\u6267\u884cbgsave()\u547d\u4ee4\u5f00\u542f\u5f02\u6b65\u7ebf\u7a0b\u5c06\u6570\u636e\u540c\u6b65\u7ed9slave\u5982\u679c\u5728\u8fd9\u4e2a\u540c\u6b65\u8fc7\u7a0b\uff0ckey\u8fd8\u6ca1\u6709\u6765\u5f97\u53ca\u540c\u6b65\u7ed9slave\u5c31\u53d1\u751f\u6545\u969c\uff0c\u8fd9\u4e2a\u65f6\u5019\u9501\u5c31\u4f1a\u4e22\u5931\u3002\u90a3\u4e48\u5bf9\u5e94\u8fd9\u79cd\u60c5\u51b5\uff0c\u6709\u4eba\u63d0\u51fa\u4e86RedLock\uff08\u7ea2\u9501\uff09\uff0c\u4ed6\u7684\u4e3b\u8981\u539f\u7406\u662f\u5728\u591a\u4e2aredis\u8282\u70b9\u4e2d\u5171\u4eab\u4e00\u4e2a\u9501\uff0c\u4f7f\u7528\u591a\u4e2a\u9501\u6765\u534f\u8c03\u4fee\u6539\u9501\u7684\u72b6\u6001\uff0c\u5177\u4f53\u7684\u7ec6\u8282\u53ef\u4ee5\u53bb\u767e\u5ea6\u4e00\u4e0b\u3002\u6211\u4eecredisson\u7684\u6846\u67b6\u63d0\u4f9b\u4e86\u5bf9redlock\u7684\u5b9e\u73b0\uff0c\u6211\u4eec\u76f4\u63a5\u5c31\u53ef\u4ee5\u7528redisson\u5c31\u53ef\u4ee5\u4e86\u3002<\/p>\n
            redisson\u6846\u67b6<\/span><\/span><\/h2>\n
            \n
            Redisson\u662f\u4e00\u4e2a\u67b6\u8bbe\u5728redis\u4e0a\u975e\u5e38\u4f18\u79c0\u7684\u5f00\u6e90\u6846\u67b6\uff0c\u63d0\u4f9b\u4e86\u4e00\u79cd\u57fa\u4e8e\u770b\u95e8\u72d7\u673a\u5236\u7684\u5206\u5e03\u5f0f\u9501\u6846\u67b6\u3002<\/p>\n<\/blockquote>\n
                redisson\u5728\u83b7\u53d6\u9501\u4e4b\u540e\uff0c\u4f1a\u7ef4\u62a4\u4e00\u4e2a\u770b\u95e8\u72d7\u7ebf\u7a0b\uff0c\u5728\u6bcf\u4e00\u4e2a\u9501\u8bbe\u7f6e\u7684\u8fc7\u671f\u65f6\u95f4\u76841\/3\u5904\uff0c\u5982\u679c\u7ebf\u7a0b\u8fd8\u6ca1\u6267\u884c\u5b8c\u4efb\u52a1\uff0c\u5219\u4e0d\u65ad\u5ef6\u957f\u9501\u7684\u6709\u6548\u671f\u3002\u770b\u95e8\u72d7\u7684\u68c0\u67e5\u9501\u8d85\u65f6\u65f6\u95f4\u9ed8\u8ba4\u662f30\u79d2\uff0c\u53ef\u4ee5\u901a\u8fc7 lockWactchdogTimeout \u53c2\u6570\u6765\u6539\u53d8\u3002<\/p>\n
                \u52a0\u9501\u7684\u65f6\u95f4\u9ed8\u8ba4\u662f30\u79d2\uff0c\u5982\u679c\u52a0\u9501\u7684\u4e1a\u52a1\u6ca1\u6709\u6267\u884c\u5b8c\uff0c\u90a3\u4e48\u6bcf\u9694 30 \u00f7 3 = 10\u79d2\uff0c\u5c31\u4f1a\u8fdb\u884c\u4e00\u6b21\u7eed\u671f\uff0c\u628a\u9501\u91cd\u7f6e\u621030\u79d2\uff0c\u4fdd\u8bc1\u89e3\u9501\u524d\u9501\u4e0d\u4f1a\u81ea\u52a8\u5931\u6548\u3002<\/p>\n
                \u7ebf\u7a0b\u53bb\u83b7\u53d6\u9501\uff0c\u83b7\u53d6\u6210\u529f\uff1a\u6267\u884clua\u811a\u672c\uff0c\u4fdd\u5b58\u6570\u636e\u5230redis\u6570\u636e\u5e93\u3002
            <\/p>\n
                \u7ebf\u7a0b\u53bb\u83b7\u53d6\u9501\uff0c\u83b7\u53d6\u5931\u8d25\uff1a\u4e00\u76f4\u901a\u8fc7while\u5faa\u73af\u5c1d\u8bd5\u83b7\u53d6\u9501\uff0c\u83b7\u53d6\u6210\u529f\u540e\uff0c\u6267\u884clua\u811a\u672c\uff0c\u4fdd\u5b58\u6570\u636e\u5230redis\u6570\u636e\u5e93\u3002<\/p>\n

            <\/span><\/p>\n
            \u6700<\/span>\u540e<\/span>
            <\/p>\n
                \u60f3\u8bf4\u7684\u5f88\u591a\uff0c\u665a\u70b9\u518d\u8bf4
            <\/span><\/p>\n

            <\/p>\n
            <\/mp-style-type><\/p>\n
            \n
            \u672c\u7bc7\u6587\u7ae0\u6765\u6e90\u4e8e\u5fae\u4fe1\u516c\u4f17\u53f7:                 Hephaestuses              <\/p>\n<\/blockquote>\n<\/div>\n","raw":"","protected":false},"excerpt":{"rendered":"
            \u6587\u4e2d\u7684\u4ee3\u7801\u4e0d\u5b8c\u6574\uff0c\u53ea\u662f\u4e2a\u5927\u6982\uff0c\u505a\u4e2a\u4e86\u89e3\u5c31\u53ef\u4ee5\u4e86\uff01     \u5206\u5e03\u5f0f\u9501\u5728\u6211\u4eec\u7684\u5f00\u53d1\u8fc7\u7a0b\u4e2d\u662f\u5341\u5206\u5e38\u89c1\u7684\u6280\u672f\uff0c\u901a\u8fc7\u6765\u8bf4 …<\/p>\n","protected":false},"author":1,"featured_media":1796,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"emotion":"","emotion_color":"","title_style":"","license":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-1797","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"post_thumbnail_image":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230528045228324-150x150.jpeg","content_first_image":null,"post_medium_image_300":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230528045228324-300x128.jpeg","post_thumbnail_image_624":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230528045228324.jpeg","post_frist_image":null,"post_medium_image":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230528045228324-300x128.jpeg","post_large_image":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230528045228324.jpeg","post_full_image":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230528045228324.jpeg","post_all_images":[],"videoAdId":"","listAd":"0","listAdId":"","listAdEvery":6,"total_comments":0,"category_name":"\u672a\u5206\u7c7b","post_date":"2023-06-19","like_count":"0","praiseWord":"\u9f13\u52b1","copyright_state":"","excitationAd":"0","rewardedVideoAdId":"","detailAdId":"","detailAd":"0","enterpriseMinapp":"0","audios":[],"postImageUrl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230519082947553.jpg","avatarurls":[],"related_posts":null,"pageviews":223,"next_post_id":2045,"next_post_title":"Hadoop \u96c6\u7fa4\u642d\u5efa","previous_post_id":1795,"previous_post_title":"\u5206\u5e03\u5f0f\u4e8b\u52a1\uff0c\u8fd9\u4e00\u7bc7\u5c31\u591f\u4e86","_links":{"self":[{"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/posts\/1797","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/comments?post=1797"}],"version-history":[{"count":0,"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/posts\/1797\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/media\/1796"}],"wp:attachment":[{"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/media?parent=1797"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/categories?post=1797"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/tags?post=1797"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}