{"id":201705,"date":"2025-05-10T10:46:44","date_gmt":"2025-05-10T02:46:44","guid":{"rendered":"https:\/\/server.hk\/cnblog\/201705\/"},"modified":"2025-05-10T10:46:44","modified_gmt":"2025-05-10T02:46:44","slug":"redis%e5%91%bd%e4%bb%a4%e4%bd%bf%e7%94%a8%e5%ae%9e%e4%be%8b%e5%88%86%e6%9e%90","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/201705\/","title":{"rendered":"Redis\u547d\u4ee4\u4f7f\u7528\u5b9e\u4f8b\u5206\u6790"},"content":{"rendered":"

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

Redis\u547d\u4ee4\u4f7f\u7528\u5b9e\u4f8b\u5206\u6790<\/h1>\n

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

\u6765\u5230golang\u5b66\u4e60\u7f51\u7684\u5927\u5bb6\uff0c\u76f8\u4fe1\u90fd\u662f\u7f16\u7a0b\u5b66\u4e60\u7231\u597d\u8005\uff0c\u5e0c\u671b\u5728\u8fd9\u91cc\u5b66\u4e60\u6570\u636e\u5e93\u76f8\u5173\u7f16\u7a0b\u77e5\u8bc6\u3002\u4e0b\u9762\u672c\u7bc7\u6587\u7ae0\u5c31\u6765\u5e26\u5927\u5bb6\u804a\u804a\u300aRedis\u547d\u4ee4\u4f7f\u7528\u5b9e\u4f8b\u5206\u6790\u300b\uff0c\u4ecb\u7ecd\u4e00\u4e0b\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u7684\u77e5\u8bc6\u79ef\u7d2f\u6709\u6240\u5e2e\u52a9\uff0c\u52a9\u529b\u5b9e\u6218\u5f00\u53d1\uff01<\/p>\n

\u95ee\u9898\u539f\u56e0<\/h3>\n

\u5c0f\u7f16\u8d1f\u8d23\u7684\u5e94\u7528\u662f\u4e00\u4e2a\u7ba1\u7406\u540e\u53f0\u5e94\u7528\uff0c\u6743\u9650\u7ba1\u7406\u4f7f\u7528 Shiro \u6846\u67b6\uff0c\u7531\u4e8e\u5b58\u5728\u591a\u4e2a\u8282\u70b9\uff0c\u9700\u8981\u4f7f\u7528\u5206\u5e03\u5f0f Session\uff0c\u4e8e\u662f\u8fd9\u91cc\u4f7f\u7528 Redis \u5b58\u50a8 Session \u4fe1\u606f\u3002<\/p>\n

\u7531\u4e8e Shiro \u5e76\u6ca1\u6709\u76f4\u63a5\u63d0\u4f9b Redis \u5b58\u50a8 Session \u7ec4\u4ef6\uff0c\u963f\u7c89\u4e0d\u5f97\u4e0d\u4f7f\u7528 Github \u4e00\u4e2a\u5f00\u6e90\u7ec4\u4ef6 shiro-redis\u3002<\/p>\n

\u7531\u4e8e Shiro \u6846\u67b6\u9700\u8981\u5b9a\u671f\u9a8c\u8bc1 Session \u662f\u5426\u6709\u6548\uff0c\u4e8e\u662f Shiro \u5e95\u5c42\u5c06\u4f1a\u8c03\u7528  SessionDAO#getActiveSessions<\/code> \u83b7\u53d6\u6240\u6709\u7684 Session \u4fe1\u606f\u3002<\/p>\n

\u800c shiro-redis<\/code> \u6b63\u597d\u7ee7\u627f SessionDAO<\/code> \u8fd9\u4e2a\u63a5\u53e3\uff0c\u5e95\u5c42\u4f7f\u7528\u7528keys<\/code> \u547d\u4ee4\u67e5\u627e Redis \u6240\u6709\u5b58\u50a8\u7684 Session<\/code> key\u3002<\/p>\n

public Set<byte[]> keys(byte[] pattern){\n    checkAndInit();\n    Set<byte[]> keys = null;\n    Jedis jedis = jedisPool.getResource();\n    try{\n        keys = jedis.keys(pattern);\n    }finally{\n        jedis.close();\n    }\n    return keys;\n}<\/pre>\n
\u627e\u5230\u95ee\u9898\u539f\u56e0\uff0c\u89e3\u51b3\u529e\u6cd5\u5c31\u6bd4\u8f83\u7b80\u5355\u4e86\uff0cgithub \u4e0a\u67e5\u627e\u5230\u89e3\u51b3\u65b9\u6848\uff0c\u5347\u7ea7\u4e00\u4e0b shiro-redis<\/code> \u5230\u6700\u65b0\u7248\u672c\u3002<\/p>\n
\u5728\u8fd9\u4e2a\u7248\u672c\uff0cshiro-redis<\/code> \u91c7\u7528 scan<\/code>\u547d\u4ee4\u4ee3\u66ff keys<\/code>,\u4ece\u800c\u4fee\u590d\u8fd9\u4e2a\u95ee\u9898\u3002<\/p>\n
public Set<byte[]> keys(byte[] pattern) {\n    Set<byte[]> keys = null;\n    Jedis jedis = jedisPool.getResource();\n\n\n    try{\n        keys = new HashSet<byte[]>();\n        ScanParams params = new ScanParams();\n        params.count(count);\n        params.match(pattern);\n        byte[] cursor = ScanParams.SCAN_POINTER_START_BINARY;\n        ScanResult<byte[]> scanResult;\n        do{\n            scanResult = jedis.scan(cursor,params);\n            keys.addAll(scanResult.getResult());\n            cursor = scanResult.getCursorAsBytes();\n        }while(scanResult.getStringCursor().compareTo(ScanParams.SCAN_POINTER_START) > 0);\n    }finally{\n        jedis.close();\n    }\n    return keys;\n\n\n}<\/pre>\n
\u867d\u7136\u95ee\u9898\u6210\u529f\u89e3\u51b3\u4e86\uff0c\u4f46\u662f\u963f\u7c89\u5fc3\u91cc\u8fd8\u662f\u6709\u70b9\u4e0d\u89e3\u3002<\/p>\n
\u4e3a\u4ec0\u4e48keys<\/code> \u6307\u4ee4\u4f1a\u5bfc\u81f4\u5176\u4ed6\u547d\u4ee4\u6267\u884c\u53d8\u6162\uff1f<\/p>\n
\u4e3a\u4ec0\u4e48Keys<\/code> \u6307\u4ee4\u67e5\u8be2\u4f1a\u8fd9\u4e48\u6162\uff1f<\/p>\n
\u4e3a\u4ec0\u4e48Scan<\/code> \u6307\u4ee4\u5c31\u6ca1\u6709\u95ee\u9898\uff1f<\/p>\n
Redis \u6267\u884c\u547d\u4ee4\u7684\u539f\u7406<\/h3>\n
\u9996\u5148\u6211\u4eec\u6765\u770b\u7b2c\u4e00\u4e2a\u95ee\u9898\uff0c\u4e3a\u4ec0\u4e48keys<\/code> \u6307\u4ee4\u4f1a\u5bfc\u81f4\u5176\u4ed6\u547d\u4ee4\u6267\u884c\u53d8\u6162\uff1f<\/p>\n
\u7ad9\u5728\u5ba2\u6237\u7aef\u7684\u89c6\u89d2\uff0c\u6267\u884c\u4e00\u6761\u547d\u4ee4\u5206\u4e3a\u4e09\u6b65\uff1a<\/p>\n
    \n
  1. \n
    \u53d1\u9001\u547d\u4ee4<\/p>\n<\/li>\n
  2. \n
    \u6267\u884c\u547d\u4ee4<\/p>\n<\/li>\n
  3. \n
    \u8fd4\u56de\u7ed3\u679c<\/p>\n<\/li>\n<\/ol>\n
    \u4f46\u662f\u8fd9\u4ec5\u4ec5\u5ba2\u6237\u7aef\u81ea\u5df1\u4ee5\u4e3a\u7684\u8fc7\u7a0b\uff0c\u4f46\u662f\u5b9e\u9645\u4e0a\u540c\u4e00\u65f6\u523b\uff0c\u53ef\u80fd\u5b58\u5728\u5f88\u591a\u5ba2\u6237\u7aef\u53d1\u9001\u547d\u4ee4\u7ed9 Redis \uff0c\u800c Redis \u6211\u4eec\u90fd\u77e5\u9053\u5b83\u91c7\u7528\u7684\u662f\u5355\u7ebf\u7a0b\u6a21\u578b\u3002<\/p>\n
    \u4e3a\u4e86\u5904\u7406\u540c\u4e00\u65f6\u523b\u6240\u6709\u7684\u5ba2\u6237\u7aef\u7684\u8bf7\u6c42\u547d\u4ee4\uff0cRedis \u5185\u90e8\u91c7\u7528\u4e86\u961f\u5217\u7684\u65b9\u5f0f\uff0c\u6392\u961f\u6267\u884c\u3002<\/p>\n
    \u4e8e\u662f\u5ba2\u6237\u7aef\u6267\u884c\u4e00\u6761\u547d\u4ee4\u5b9e\u9645\u9700\u8981\u56db\u6b65\uff1a<\/p>\n
      \n
    1. \n
      \u53d1\u9001\u547d\u4ee4<\/p>\n<\/li>\n
    2. \n
      \u547d\u4ee4\u6392\u961f<\/p>\n<\/li>\n
    3. \n
      \u6267\u884c\u547d\u4ee4<\/p>\n<\/li>\n
    4. \n
      \u8fd4\u56de\u7ed3\u679c<\/p>\n<\/li>\n<\/ol>\n
      \u7531\u4e8e Redis \u5355\u7ebf\u7a0b\u6267\u884c\u547d\u4ee4\uff0c\u53ea\u80fd\u987a\u5e8f\u4ece\u961f\u5217\u53d6\u51fa\u4efb\u52a1\u5f00\u59cb\u6267\u884c\u3002<\/p>\n
      \u53ea\u8981 3 \u8fd9\u4e2a\u8fc7\u7a0b\u6267\u884c\u547d\u4ee4\u901f\u5ea6\u8fc7\u6162\uff0c\u961f\u5217\u5176\u4ed6\u4efb\u52a1\u4e0d\u5f97\u4e0d\u8fdb\u884c\u7b49\u5f85\uff0c\u8fd9\u5bf9\u5916\u90e8\u5ba2\u6237\u7aef\u770b\u6765\uff0cRedis \u597d\u50cf\u5c31\u88ab\u963b\u585e\u4e00\u6837\uff0c\u4e00\u76f4\u5f97\u4e0d\u5230\u54cd\u5e94\u3002<\/p>\n
      \u6240\u4ee5\u4f7f\u7528 Redis \u8fc7\u7a0b\u5207\u52ff\u6267\u884c\u9700\u8981\u957f\u65f6\u95f4\u8fd0\u884c\u7684\u6307\u4ee4\uff0c\u8fd9\u6837\u53ef\u80fd\u5bfc\u81f4 Redis \u963b\u585e\uff0c\u5f71\u54cd\u6267\u884c\u5176\u4ed6\u6307\u4ee4\u3002<\/p>\n
      KEYS \u539f\u7406<\/h3>\n
      \u63a5\u4e0b\u6765\u5f00\u59cb\u56de\u7b54\u7b2c\u4e8c\u4e2a\u95ee\u9898\uff0c\u4e3a\u4ec0\u4e48Keys<\/code> \u6307\u4ee4\u67e5\u8be2\u4f1a\u8fd9\u4e48\u6162\uff1f<\/p>\n
      \u56de\u7b54\u8fd9\u4e2a\u95ee\u9898\u4e4b\u524d\uff0c\u8bf7\u5927\u5bb6\u56de\u60f3\u4e00\u4e0b Redis \u5e95\u5c42\u5b58\u50a8\u7ed3\u6784\u3002<\/p>\n
      \u4e0d\u592a\u6e05\u695a\u670b\u53cb\u7684\u4e5f\u6ca1\u5173\u7cfb\uff0c\u5927\u5bb6\u53ef\u4ee5\u56de\u770b\u4e00\u4e0b\u4e4b\u524d\u7684\u6587\u7ae0\u300c\u963f\u91cc\u9762\u8bd5\u5b98\uff1aHashMap \u719f\u6089\u5427\uff1f\u597d\u7684\uff0c\u90a3\u5c31\u6765\u804a\u804a Redis \u5b57\u5178\u5427\uff01\u300d\u3002<\/p>\n
      keys<\/code>\u547d\u4ee4\u9700\u8981\u8fd4\u56de\u6240\u6709\u7684\u7b26\u5408\u7ed9\u5b9a\u6a21\u5f0f pattern<\/code> \u7684  Redis \u4e2d\u952e\uff0c\u4e3a\u4e86\u5b9e\u73b0\u8fd9\u4e2a\u76ee\u7684\uff0cRedis \u4e0d\u5f97\u4e0d\u904d\u5386\u5b57\u5178\u4e2d ht[0]<\/code>\u54c8\u5e0c\u8868\u5e95\u5c42\u6570\u7ec4\uff0c\u8fd9\u4e2a\u65f6\u95f4\u590d\u6742\u5ea6\u4e3a \u300cO(N)\u300d<\/strong>\uff08N \u4e3a Redis \u4e2d key \u6240\u6709\u7684\u6570\u91cf\uff09\u3002<\/p>\n
      \u901f\u5ea6\u5f88\u5feb\u7684\u60c5\u51b5\u4e0b Redis \u4e2d\u4ec5\u5b58\u6709\u5c11\u91cf\u7684 key\u3002\u5f53 Redis key \u7684\u6570\u91cf\u9010\u6e10\u589e\u52a0\u5e76\u8fbe\u5230\u767e\u4e07\u3001\u5343\u4e07\u751a\u81f3\u4e0a\u4ebf\u7ea7\u522b\u65f6\uff0c\u6267\u884c\u901f\u5ea6\u5c06\u4f1a\u660e\u663e\u53d8\u6162\u3002<\/p>\n
      \u4e0b\u9762\u662f\u963f\u7c89\u672c\u5730\u505a\u7684\u4e00\u6b21\u5b9e\u9a8c\uff0c\u4f7f\u7528 lua \u811a\u672c\u5f80 Redis \u4e2d\u589e\u52a0 10W \u4e2a key\uff0c\u7136\u540e\u4f7f\u7528 keys<\/code> \u67e5\u8be2\u6240\u6709\u952e,\u8fd9\u4e2a\u67e5\u8be2\u5927\u6982\u4f1a\u963b\u585e\u5341\u51e0\u79d2\u7684\u65f6\u95f4\u3002<\/p>\n
      eval \"for i=1,100000  do redis.call('set',i,i+1) end\" 0<\/pre>\n
      \n
      \u8fd9\u91cc\u963f\u7c89\u4f7f\u7528 Docker \u90e8\u7f72 Redis\uff0c\u6027\u80fd\u53ef\u80fd\u4f1a\u7a0d\u5dee\u3002<\/p>\n<\/blockquote>\n
      SCAN \u539f\u7406<\/h3>\n
      \u6700\u540e\u6211\u4eec\u6765\u770b\u4e0b\u7b2c\u4e09\u4e2a\u95ee\u9898\uff0c\u4e3a\u4ec0\u4e48scan<\/code> \u6307\u4ee4\u5c31\u6ca1\u6709\u95ee\u9898\uff1f<\/p>\n
      \u8fd9\u662f\u56e0\u4e3a scan<\/code>\u547d\u4ee4\u91c7\u7528\u4e00\u79cd\u9ed1\u79d1\u6280-\u300c\u57fa\u4e8e\u6e38\u6807\u7684\u8fed\u4ee3\u5668\u300d<\/strong>\u3002<\/p>\n
      \u6bcf\u6b21\u8c03\u7528 scan<\/code> \u547d\u4ee4\uff0cRedis \u90fd\u4f1a\u5411\u7528\u6237\u8fd4\u56de\u4e00\u4e2a\u65b0\u7684\u6e38\u6807\u4ee5\u53ca\u4e00\u5b9a\u6570\u91cf\u7684 key\u3002\u4e0b\u6b21\u518d\u60f3\u7ee7\u7eed\u83b7\u53d6\u5269\u4f59\u7684 key\uff0c\u9700\u8981\u5c06\u8fd9\u4e2a\u6e38\u6807\u4f20\u5165 scan \u547d\u4ee4\uff0c \u4ee5\u6b64\u6765\u5ef6\u7eed\u4e4b\u524d\u7684\u8fed\u4ee3\u8fc7\u7a0b\u3002<\/p>\n
      \u7b80\u5355\u6765\u8bb2\uff0cscan<\/code> \u547d\u4ee4\u4f7f\u7528\u5206\u9875\u67e5\u8be2 redis \u3002<\/p>\n
      \u4e0b\u9762\u662f\u4e00\u4e2a scan \u547d\u4ee4\u7684\u8fed\u4ee3\u8fc7\u7a0b\u793a\u4f8b\uff1a<\/p>\n
      scan<\/code> \u547d\u4ee4\u4f7f\u7528\u6e38\u6807\u8fd9\u79cd\u65b9\u5f0f\uff0c\u5de7\u5999\u5c06\u4e00\u6b21\u5168\u91cf\u67e5\u8be2\u62c6\u5206\u6210\u591a\u6b21\uff0c\u964d\u4f4e\u67e5\u8be2\u590d\u6742\u5ea6\u3002<\/p>\n
      \u867d\u7136  scan<\/code> \u547d\u4ee4\u65f6\u95f4\u590d\u6742\u5ea6\u4e0e keys<\/code>\u4e00\u6837\uff0c\u90fd\u662f \u300cO(N)\u300d<\/strong>\uff0c\u4f46\u662f\u7531\u4e8e scan<\/code> \u547d\u4ee4\u53ea\u9700\u8981\u8fd4\u56de\u5c11\u91cf\u7684 key\uff0c\u6240\u4ee5\u6267\u884c\u901f\u5ea6\u4f1a\u5f88\u5feb\u3002<\/p>\n
      \u6700\u540e\uff0c\u867d\u7136scan<\/code> \u547d\u4ee4\u89e3\u51b3 keys<\/code>\u4e0d\u8db3\uff0c\u4f46\u662f\u540c\u65f6\u4e5f\u5f15\u5165\u5176\u4ed6\u4e00\u4e9b\u7f3a\u9677\uff1a<\/p>\n
        \n
      • \n
        \u540c\u4e00\u4e2a\u5143\u7d20\u53ef\u80fd\u4f1a\u88ab\u8fd4\u56de\u591a\u6b21\uff0c\u8fd9\u5c31\u9700\u8981\u6211\u4eec\u5e94\u7528\u7a0b\u5e8f\u589e\u52a0\u5904\u7406\u91cd\u590d\u5143\u7d20\u529f\u80fd\u3002<\/p>\n<\/li>\n
      • \n
        \u5728\u8fed\u4ee3\u8fc7\u7a0b\u4e2d\uff0c\u589e\u52a0\u6216\u5220\u9664\u4e00\u4e2a\u5143\u7d20\u65f6\uff0c\u8be5\u5143\u7d20\u6709\u53ef\u80fd\u4f1a\u88ab\u8fd4\u56de\uff0c\u4e5f\u6709\u53ef\u80fd\u4e0d\u4f1a\u88ab\u8fd4\u56de\u3002<\/p>\n<\/li>\n<\/ul>\n
        \u4ee5\u4e0a\u8fd9\u4e9b\u7f3a\u9677\uff0c\u5728\u6211\u4eec\u5f00\u53d1\u4e2d\u9700\u8981\u8003\u8651\u8fd9\u79cd\u60c5\u51b5\u3002<\/p>\n
        \u9664\u4e86 scan<\/code>\u4ee5\u5916\uff0credis \u8fd8\u6709\u5176\u4ed6\u51e0\u4e2a\u7528\u4e8e\u589e\u91cf\u8fed\u4ee3\u547d\u4ee4\uff1a<\/p>\n
          \n
        • \n
          sscan<\/code>:\u7528\u4e8e\u8fed\u4ee3\u5f53\u524d\u6570\u636e\u5e93\u4e2d\u7684\u6570\u636e\u5e93\u952e\uff0c\u7528\u4e8e\u89e3\u51b3 smembers<\/code>\u53ef\u80fd\u4ea7\u751f\u963b\u585e\u95ee\u9898<\/p>\n<\/li>\n
        • \n
          hscan<\/code>\u547d\u4ee4\u7528\u4e8e\u8fed\u4ee3\u54c8\u5e0c\u952e\u4e2d\u7684\u952e\u503c\u5bf9\uff0c\u7528\u4e8e\u89e3\u51b3 hgetall<\/code> \u53ef\u80fd\u4ea7\u751f\u963b\u585e\u95ee\u9898\u3002<\/p>\n<\/li>\n
        • \n
          zscan<\/code>:\u547d\u4ee4\u7528\u4e8e\u8fed\u4ee3\u6709\u5e8f\u96c6\u5408\u4e2d\u7684\u5143\u7d20\uff08\u5305\u62ec\u5143\u7d20\u6210\u5458\u548c\u5143\u7d20\u5206\u503c\uff09\uff0c\u7528\u4e8e\u4ea7\u751f zrange<\/code> \u53ef\u80fd\u4ea7\u751f\u963b\u585e\u95ee\u9898\u3002<\/p>\n<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"
          Redis\u547d\u4ee4\u4f7f\u7528\u5b9e\u4f8b\u5206\u6790 \u6536\u85cf...<\/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-201705","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/201705","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=201705"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/201705\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=201705"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=201705"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=201705"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}