{"id":202191,"date":"2025-05-10T09:22:39","date_gmt":"2025-05-10T01:22:39","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202191\/"},"modified":"2025-05-10T09:22:39","modified_gmt":"2025-05-10T01:22:39","slug":"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8redis%e5%92%8clua%e5%bc%80%e5%8f%91%e7%ae%80%e5%8d%95%e7%9a%84%e8%af%84%e5%88%86%e7%b3%bb%e7%bb%9f%e5%8a%9f%e8%83%bd","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202191\/","title":{"rendered":"\u5982\u4f55\u4f7f\u7528Redis\u548cLua\u5f00\u53d1\u7b80\u5355\u7684\u8bc4\u5206\u7cfb\u7edf\u529f\u80fd"},"content":{"rendered":"

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

\u5982\u4f55\u4f7f\u7528Redis\u548cLua\u5f00\u53d1\u7b80\u5355\u7684\u8bc4\u5206\u7cfb\u7edf\u529f\u80fd<\/h1>\n

\u6700\u8fd1\u53d1\u73b0\u4e0d\u5c11\u5c0f\u4f19\u4f34\u90fd\u5bf9\u6570\u636e\u5e93<\/span>\u5f88\u611f\u5174\u8da3\uff0c\u6240\u4ee5\u4eca\u5929\u7ee7\u7eed\u7ed9\u5927\u5bb6\u4ecb\u7ecd\u6570\u636e\u5e93<\/span>\u76f8\u5173\u7684\u77e5\u8bc6\uff0c\u672c\u6587\u300a\u5982\u4f55\u4f7f\u7528Redis\u548cLua\u5f00\u53d1\u7b80\u5355\u7684\u8bc4\u5206\u7cfb\u7edf\u529f\u80fd\u300b<\/span>\u4e3b\u8981\u5185\u5bb9\u6d89\u53ca\u5230<\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5e0c\u671b\u80fd\u5e2e\u5230\u4f60\uff01\u5f53\u7136\u5982\u679c\u9605\u8bfb\u672c\u6587\u65f6\u5b58\u5728\u4e0d\u540c\u60f3\u6cd5\uff0c\u53ef\u4ee5\u5728\u8bc4\u8bba\u4e2d\u8868\u8fbe\uff0c\u4f46\u662f\u8bf7\u52ff\u4f7f\u7528\u8fc7\u6fc0\u7684\u63aa\u8f9e~<\/p>\n

\u5982\u4f55\u4f7f\u7528Redis\u548cLua\u5f00\u53d1\u7b80\u5355\u7684\u8bc4\u5206\u7cfb\u7edf\u529f\u80fd<\/p>\n

\u5728\u5f00\u53d1\u5e94\u7528\u7a0b\u5e8f\u4e2d\uff0c\u8bc4\u5206\u7cfb\u7edf\u529f\u80fd\u662f\u4e00\u4e2a\u5e38\u89c1\u7684\u9700\u6c42\u3002\u4f7f\u7528Redis\u548cLua\u7ed3\u5408\uff0c\u53ef\u4ee5\u5feb\u901f\u5b9e\u73b0\u4e00\u4e2a\u7b80\u5355\u800c\u9ad8\u6548\u7684\u8bc4\u5206\u7cfb\u7edf\u3002Redis\u662f\u4e00\u79cd\u9ad8\u6027\u80fd\u7684\u952e\u503c\u5bf9\u6570\u636e\u5e93\uff0c\u800cLua\u662f\u4e00\u79cd\u8f7b\u91cf\u7ea7\u811a\u672c\u8bed\u8a00\uff0c\u53ef\u4ee5\u5d4c\u5165\u5230Redis\u4e2d\u6267\u884c\u3002<\/p>\n

\u8bc4\u5206\u7cfb\u7edf\u529f\u80fd\u7684\u5b9e\u73b0\u6d89\u53ca\u4ee5\u4e0b\u51e0\u4e2a\u65b9\u9762\uff1a<\/p>\n

    \n
  1. \u7528\u6237\u6295\u7968\uff1a\u7528\u6237\u53ef\u4ee5\u5bf9\u7279\u5b9a\u7684\u5b9e\u4f53\uff08\u5982\u6587\u7ae0\u3001\u89c6\u9891\u3001\u5546\u54c1\u7b49\uff09\u8fdb\u884c\u6295\u7968\uff0c\u53ef\u4ee5\u9009\u62e9\u8d5e\u6210\u6216\u53cd\u5bf9\u3002<\/li>\n
  2. \u8ba1\u7b97\u5206\u6570\uff1a\u6839\u636e\u7528\u6237\u6295\u7968\u7684\u7ed3\u679c\uff0c\u9700\u8981\u8ba1\u7b97\u51fa\u4e00\u4e2a\u7efc\u5408\u7684\u5206\u6570\u6765\u8861\u91cf\u5b9e\u4f53\u7684\u597d\u574f\u3002<\/li>\n
  3. \u6392\u5e8f\uff1a\u6839\u636e\u5206\u6570\u8fdb\u884c\u6392\u5e8f\uff0c\u5c06\u5b9e\u4f53\u6309\u7167\u7528\u6237\u7684\u559c\u597d\u548c\u70ed\u5ea6\u8fdb\u884c\u5c55\u793a\u3002<\/li>\n<\/ol>\n

    \u4ee5\u4e0b\u662f\u4e00\u4e2a\u4f7f\u7528Redis\u548cLua\u5f00\u53d1\u7684\u7b80\u5355\u8bc4\u5206\u7cfb\u7edf\u7684\u4ee3\u7801\u793a\u4f8b\uff1a<\/p>\n

      \n
    1. \u7528\u6237\u6295\u7968<\/li>\n<\/ol>\n
      -- \u53c2\u6570\u8bf4\u660e\uff1a\n-- entityId: \u5b9e\u4f53\u7684\u552f\u4e00\u6807\u8bc6\n-- userId: \u7528\u6237\u7684\u552f\u4e00\u6807\u8bc6\n-- voteType: \u6295\u7968\u7c7b\u578b\uff0c1\u8868\u793a\u8d5e\u6210\uff0c-1\u8868\u793a\u53cd\u5bf9\n\nfunction vote(entityId, userId, voteType)\n    -- \u68c0\u67e5\u7528\u6237\u662f\u5426\u5df2\u7ecf\u6295\u8fc7\u7968\uff0c\u5982\u679c\u662f\u5219\u53d6\u6d88\u4e4b\u524d\u7684\u6295\u7968\n    local prevVoteType = redis.call(\"HGET\", \"vote:\" .. entityId, userId)\n    if prevVoteType == \"1\" then\n        redis.call(\"HINCRBY\", \"score:\" .. entityId, \"upvotes\", -1)\n    elseif prevVoteType == \"-1\" then\n        redis.call(\"HINCRBY\", \"score:\" .. entityId, \"downvotes\", -1)\n    end\n\n    -- \u66f4\u65b0\u7528\u6237\u7684\u6295\u7968\u8bb0\u5f55\n    redis.call(\"HSET\", \"vote:\" .. entityId, userId, voteType)\n\n    -- \u66f4\u65b0\u5b9e\u4f53\u7684\u5206\u6570\n    if voteType == \"1\" then\n        redis.call(\"HINCRBY\", \"score:\" .. entityId, \"upvotes\", 1)\n    elseif voteType == \"-1\" then\n        redis.call(\"HINCRBY\", \"score:\" .. entityId, \"downvotes\", 1)\n    end\nend<\/pre>\n
        \n
      1. \u8ba1\u7b97\u5206\u6570<\/li>\n<\/ol>\n
        -- \u53c2\u6570\u8bf4\u660e\uff1a\n-- entityId: \u5b9e\u4f53\u7684\u552f\u4e00\u6807\u8bc6\n\nfunction calculateScore(entityId)\n    local upvotes = redis.call(\"HGET\", \"score:\" .. entityId, \"upvotes\") or 0\n    local downvotes = redis.call(\"HGET\", \"score:\" .. entityId, \"downvotes\") or 0\n\n    -- \u5206\u6570\u8ba1\u7b97\u89c4\u5219\u53ef\u4ee5\u6839\u636e\u5b9e\u9645\u9700\u6c42\u8fdb\u884c\u8c03\u6574\n    local score = tonumber(upvotes) - tonumber(downvotes)\n\n    -- \u66f4\u65b0\u5b9e\u4f53\u7684\u5206\u6570\n    redis.call(\"HSET\", \"score:\" .. entityId, \"score\", score)\n\n    return score\nend<\/pre>\n
          \n
        1. \u6392\u5e8f<\/li>\n<\/ol>\n
          -- \u53c2\u6570\u8bf4\u660e\uff1a\n-- entityIds: \u5b9e\u4f53\u7684\u552f\u4e00\u6807\u8bc6\u5217\u8868\n\nfunction sortEntities(entityIds)\n    local scores = {}\n    for i, entityId in ipairs(entityIds) do\n        local score = redis.call(\"HGET\", \"score:\" .. entityId, \"score\") or 0\n        scores[i] = {entityId, tonumber(score)}\n    end\n\n    -- \u6839\u636e\u5206\u6570\u8fdb\u884c\u6392\u5e8f\n    table.sort(scores, function(a, b) return a[2] > b[2] end)\n\n    -- \u8fd4\u56de\u6309\u7167\u5206\u6570\u6392\u5e8f\u540e\u7684\u5b9e\u4f53\u5217\u8868\n    local sortedEntities = {}\n    for i, entity in ipairs(scores) do\n        sortedEntities[i] = entity[1]\n    end\n\n    return sortedEntities\nend<\/pre>\n
          \u901a\u8fc7\u5c06\u4ee5\u4e0a\u4ee3\u7801\u4fdd\u5b58\u4e3a\u4e00\u4e2aRedis\u811a\u672c\uff0c\u7136\u540e\u5728\u7a0b\u5e8f\u4e2d\u8c03\u7528\u76f8\u5e94\u7684\u811a\u672c\u547d\u4ee4\uff0c\u5373\u53ef\u5b8c\u6210\u7b80\u5355\u7684\u8bc4\u5206\u7cfb\u7edf\u529f\u80fd\u7684\u5f00\u53d1\u3002<\/p>\n
          \u4ee5\u4e0a\u793a\u4f8b\u4ee3\u7801\u4ec5\u4e3a\u6f14\u793a\u76ee\u7684\uff0c\u5b9e\u9645\u7684\u8bc4\u5206\u7cfb\u7edf\u529f\u80fd\u7684\u5b9e\u73b0\u53ef\u80fd\u66f4\u52a0\u590d\u6742\uff0c\u5982\u8003\u8651\u7528\u6237\u6743\u9650\u3001\u8fc7\u671f\u65f6\u95f4\u7b49\u3002\u4f46\u8fd9\u662f\u4e00\u4e2a\u7b80\u5355\u800c\u9ad8\u6548\u7684\u8bc4\u5206\u7cfb\u7edf\u7684\u57fa\u7840\uff0c\u53ef\u4ee5\u6839\u636e\u5b9e\u9645\u9700\u6c42\u8fdb\u884c\u6269\u5c55\u548c\u8c03\u6574\u3002\u540c\u65f6\uff0c\u7ed3\u5408Redis\u548cLua\u7684\u7279\u70b9\uff0c\u53ef\u4ee5\u5b9e\u73b0\u66f4\u9ad8\u6548\u7684\u8ba1\u7b97\u548c\u5b58\u50a8\u64cd\u4f5c\uff0c\u63d0\u5347\u7cfb\u7edf\u7684\u6027\u80fd\u548c\u53ef\u6269\u5c55\u6027\u3002<\/p>\n
          \n
          \n <\/dt>\n
          \n   \u5982\u4f55\u5229\u7528Redis\u548cElixir\u5b9e\u73b0\u5b9e\u65f6\u5730\u7406\u4f4d\u7f6e\u8ddf\u8e2a\u529f\u80fd\n <\/dd>\n<\/dl>\n
          \n
          \n <\/dt>\n
          \n   \u5982\u4f55\u5229\u7528Redis\u548cDart\u5f00\u53d1\u5b9e\u65f6\u65e5\u7a0b\u5b89\u6392\u529f\u80fd\n <\/dd>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"
          \u5982\u4f55\u4f7f\u7528Redis\u548cLua\u5f00\u53d1\u7b80...<\/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-202191","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202191","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=202191"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202191\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202191"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202191"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202191"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}