{"id":120154,"date":"2026-10-31T04:56:53","date_gmt":"2026-10-30T20:56:53","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/120154.html"},"modified":"2026-10-31T04:56:53","modified_gmt":"2026-10-30T20:56:53","slug":"%e7%a7%92%e6%9d%80%e4%bc%98%e5%8c%96%e4%b8%89%e8%bf%9e%ef%bc%9alua-%e9%98%bb%e5%a1%9e%e9%98%9f%e5%88%97-redis-stream%ef%bc%8c%e5%93%8d%e5%ba%94%e4%bb%8e-3-4-%e7%a7%92%e5%88%b0%e6%af%ab%e7%a7%92","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/120154.html","title":{"rendered":"\u79d2\u6740\u4f18\u5316\u4e09\u8fde\uff1aLua + \u963b\u585e\u961f\u5217 + Redis Stream\uff0c\u54cd\u5e94\u4ece 3.4 \u79d2\u5230\u6beb\u79d2\u7ea7"},"content":{"rendered":"

\u79d2\u6740\u4f18\u5316\u4e09\u8fde：Lua + \u963b\u585e\u961f\u5217 + Redis Stream，\u54cd\u5e94\u4ece 3.4 \u79d2\u5230\u6beb\u79d2\u7ea7<\/h2>\n

\u8fd9\u662f\u300a\u9ed1\u9a6c\u70b9\u8bc4\u9879\u76ee\u590d\u76d8\u300b\u7b2c 4 \u7bc7\u3002
\n\u4e0a\u4e00\u7bc7\u89e3\u51b3"\u5356\u8d85"，\u8fd9\u4e00\u7bc7\u89e3\u51b3"\u592a\u6162"\u3002\u6162\u5230\u4ec0\u4e48\u7a0b\u5ea6？200 \u5e76\u53d1\u62a2 100 \u5e93\u5b58，\u8017\u65f6 3.4 \u79d2\u3002
\n\u4f18\u5316\u540e：\u8d44\u683c\u5224\u65ad\u5728 Redis \u91cc\u4e00\u6b21\u539f\u5b50\u5b8c\u6210，\u843d\u5e93\u4ea4\u7ed9\u540e\u53f0\u7ebf\u7a0b\u3002\u7528\u6237\u53ea\u7b49"\u80fd\u4e0d\u80fd\u62a2\u5230"，\u4e0d\u7b49"\u6570\u636e\u5e93\u5199\u5b8c\u6ca1\u6709"\u3002<\/p>\n

\u4e00\u3001\u5148\u7b97\u6e05\u695a\u6162\u5728\u54ea<\/h3>\n

\u539f\u6765\u7684\u4e0b\u5355\u6d41\u7a0b，6 \u4e2a\u6b65\u9aa4\u5168\u6253 MySQL，\u800c\u4e14\u662f\u5355\u7ebf\u7a0b\u4e32\u884c：<\/p>\n

1. \u67e5\u8be2\u4f18\u60e0\u5238 \u2192 2. \u5224\u5e93\u5b58 \u2192 3. \u67e5\u8ba2\u5355 \u2192 4. \u6821\u9a8c\u4e00\u4eba\u4e00\u5355
\n\u2192 5. \u6263\u5e93\u5b58 \u2192 6. \u521b\u5efa\u8ba2\u5355<\/p>\n

\u6bcf\u4e00\u6b65\u90fd\u662f\u4e00\u6b21\u6570\u636e\u5e93\u5f80\u8fd4\u3002200 \u5e76\u53d1\u62a2 100 \u5e93\u5b58，\u8017\u65f6 3.4 \u79d2\u3002<\/p>\n

\u6ce8\u610f\u8fd9 3.4 \u79d2\u662f\u600e\u4e48\u6765\u7684：\u4e0d\u662f"\u6162\u4e86 3.4 \u79d2"，\u800c\u662f200 \u4e2a\u8bf7\u6c42\u6392\u961f\u8d70\u5b8c\u8fd9 6 \u6b65\u603b\u5171\u82b1 3.4 \u79d2\u3002\u7528\u6237\u4f53\u611f\u662f"\u70b9\u4e86\u4e4b\u540e\u8981\u8f6c\u5f88\u4e45"\u3002<\/p>\n

\u79d2\u6740\u573a\u666f\u6700\u6015\u8fd9\u4e2a\u2014\u2014\u6d41\u91cf\u662f\u8109\u51b2\u5f0f\u7684，\u51e0\u79d2\u949f\u6d8c\u8fdb\u6765，\u6570\u636e\u5e93\u8fde\u63a5\u6c60\u77ac\u95f4\u88ab\u6253\u6ee1，\u540e\u9762\u7684\u8bf7\u6c42\u5168\u5728\u6392\u961f，\u8d8a\u6392\u8d8a\u4e45\u3002<\/p>\n

\u4e8c\u3001\u4e3a\u4ec0\u4e48"\u591a\u7ebf\u7a0b\u5e76\u884c"\u662f\u9519\u7684\u7b54\u6848<\/h3>\n

\u7b2c\u4e00\u53cd\u5e94\u80af\u5b9a\u662f：\u65e2\u7136\u5355\u7ebf\u7a0b\u6162，\u90a3\u591a\u7ebf\u7a0b\u5e76\u884c\u8dd1\u4e0d\u5c31\u884c\u4e86？<\/p>\n

\u8bb2\u4e49\u660e\u786e\u5426\u5b9a\u4e86\u8fd9\u4e2a\u601d\u8def，\u7406\u7531\u4e24\u6761，\u7b2c\u4e8c\u6761\u624d\u662f\u5173\u952e：<\/p>\n\n\u7406\u7531\u8bf4\u660e<\/tr>\n\n\n\n
\u2460 \u7ebf\u7a0b\u6c60\u4f1a\u88ab\u8017\u5c3d<\/td>\n\u6bcf\u4e2a\u8bf7\u6c42\u5f00 N \u4e2a\u7ebf\u7a0b \u2192 \u9ad8\u5e76\u53d1\u4e0b\u77ac\u95f4\u6253\u6ee1，\u53cd\u800c\u66f4\u7cdf<\/td>\n<\/tr>\n
\u2461 \u65f6\u6548\u6027\u662f\u4f2a\u9700\u6c42 \u2b50<\/td>\n\u7528\u6237\u53ea\u5173\u5fc3"\u80fd\u4e0d\u80fd\u62a2\u5230"，\u4e0d\u5173\u5fc3"\u6570\u636e\u5e93\u90a3\u6761\u8bb0\u5f55\u662f\u4e0d\u662f\u6b64\u523b\u5c31\u5199\u597d\u4e86"<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u7b2c \u2461 \u6761\u662f\u4e00\u4e2a\u89c2\u5ff5\u8f6c\u53d8，\u6211\u89c9\u5f97\u503c\u4e00\u6574\u6bb5：<\/p>\n

\u4e4b\u524d\u6211\u4e00\u76f4\u9ed8\u8ba4"\u63a5\u53e3\u5fc5\u987b\u628a\u6d3b\u5e72\u5b8c\u624d\u80fd\u8fd4\u56de"\u3002\u4f46\u79d2\u6740\u8fd9\u91cc，\u7528\u6237\u771f\u6b63\u8981\u7684\u53ea\u6709\u4e00\u4ef6\u4e8b：\u544a\u8bc9\u6211\u62a2\u6ca1\u62a2\u5230\u3002<\/p>\n

\u81f3\u4e8e\u8ba2\u5355\u8bb0\u5f55\u4ec0\u4e48\u65f6\u5019\u843d\u5e93\u2014\u20141 \u79d2\u540e\u8fd8\u662f 3 \u79d2\u540e，\u7528\u6237\u6839\u672c\u611f\u77e5\u4e0d\u5230\u3002\u4ed6\u53ea\u4f1a\u62ff\u7740\u8fd4\u56de\u7684\u8ba2\u5355 id \u53bb"\u6211\u7684\u8ba2\u5355"\u91cc\u67e5，\u90a3\u65f6\u5019\u65e9\u843d\u5b8c\u4e86\u3002<\/p>\n

\u6240\u4ee5\u6b63\u786e\u7684\u601d\u8def\u4e0d\u662f"\u8ba9\u6d41\u7a0b\u66f4\u5feb"，\u800c\u662f"\u628a\u6d41\u7a0b\u62c6\u6210\u5feb\u548c\u6162\u4e24\u6bb5"：<\/p>\n

    \n
  • \u5feb\u7684\u90a3\u6bb5：\u5224\u65ad\u6709\u6ca1\u6709\u8d44\u683c（\u5e93\u5b58\u591f\u4e0d\u591f\u3001\u662f\u4e0d\u662f\u91cd\u590d\u4e0b\u5355）\u2192 \u5fc5\u987b\u5728 Redis \u91cc\u539f\u5b50\u5b8c\u6210 \u2192 \u7acb\u523b\u8fd4\u56de<\/li>\n
  • \u6162\u7684\u90a3\u6bb5：\u771f\u6b63\u6263\u5e93\u5b58\u3001\u5efa\u8ba2\u5355 \u2192 \u4e22\u7ed9\u540e\u53f0\u7ebf\u7a0b\u6162\u6162\u505a<\/li>\n<\/ul>\n

    \u4e09\u3001\u7b2c\u4e00\u6b65：Lua \u505a\u8d44\u683c\u5224\u65ad<\/h3>\n

    \u8d44\u683c\u5224\u65ad\u8981\u56de\u7b54\u4e24\u4e2a\u95ee\u9898：\u8fd8\u6709\u5e93\u5b58\u5417？\u8fd9\u4e2a\u4eba\u4e70\u8fc7\u5417？<\/p>\n

    \u6570\u636e\u653e Redis：<\/p>\n\n\u6570\u636eRedis \u7ed3\u6784key<\/tr>\n\n\n\n
    \u5e93\u5b58<\/td>\nString<\/td>\nseckill:stock:{voucherId}<\/td>\n<\/tr>\n
    \u5df2\u4e0b\u5355\u7528\u6237<\/td>\nSet \u2b50<\/td>\nseckill:order:{voucherId}<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    \u4e3a\u4ec0\u4e48\u7528 Set？ \u56e0\u4e3a\u5b83\u5929\u7136\u53bb\u91cd，SISMEMBER \u4e00\u53e5\u5c31\u80fd\u5224\u65ad"\u8fd9\u4e2a\u7528\u6237\u4e0b\u8fc7\u6ca1"，\u5b8c\u7f8e\u5339\u914d"\u4e00\u4eba\u4e00\u5355"\u3002\u7528 List \u8fd8\u5f97\u81ea\u5df1\u904d\u5386\u3002<\/p>\n

    \u4e3a\u4ec0\u4e48\u5fc5\u987b\u7528 Lua？ \u56e0\u4e3a"\u67e5\u5e93\u5b58 \u2192 \u67e5\u662f\u5426\u4e0b\u5355 \u2192 \u6263\u5e93\u5b58 \u2192 \u8bb0\u7528\u6237"\u662f 4 \u6b65\u64cd\u4f5c，\u5982\u679c\u5206\u5f00\u6267\u884c，\u4e2d\u95f4\u4e00\u6837\u6709\u65f6\u95f4\u7f1d，\u7b49\u4e8e\u628a Java \u91cc\u7684\u5e76\u53d1\u95ee\u9898\u539f\u5c01\u4e0d\u52a8\u642c\u5230\u4e86 Redis\u3002<\/p>\n

    Lua \u811a\u672c\u5728 Redis \u91cc\u662f\u5355\u7ebf\u7a0b\u539f\u5b50\u6267\u884c\u7684，4 \u6b65\u5e76\u6210 1 \u6b65：<\/p>\n

    — seckill \u8d44\u683c\u5224\u65ad：\u5e93\u5b58 + \u4e00\u4eba\u4e00\u5355，\u5168\u90e8\u539f\u5b50<\/span>
    \n— args: ARGV[1]=voucherId, ARGV[2]=userId, ARGV[3]=orderId<\/span><\/p>\n

    local<\/span> voucherId =<\/span> ARGV[<\/span>1<\/span>]<\/span>
    \nlocal<\/span> userId =<\/span> ARGV[<\/span>2<\/span>]<\/span>
    \nlocal<\/span> orderId =<\/span> ARGV[<\/span>3<\/span>]<\/span><\/p>\n

    — 1. \u62fc key：\u5e93\u5b58（String）\u3001\u5df2\u4e0b\u5355\u7528\u6237（Set）<\/span>
    \nlocal<\/span> stockKey =<\/span> 'seckill:stock:'<\/span> ..<\/span> voucherId
    \nlocal<\/span> orderKey =<\/span> 'seckill:order:'<\/span> ..<\/span> voucherId<\/p>\n

    — 2. \u5224\u65ad\u5e93\u5b58，\u4e0d\u8db3\u8fd4\u56de 1<\/span>
    \nif<\/span> (<\/span>tonumber<\/span>(<\/span>redis.<\/span>call<\/span>(<\/span>'get'<\/span>,<\/span> stockKey)<\/span>)<\/span> <=<\/span> 0<\/span>)<\/span> then<\/span>
    \n return<\/span> 1<\/span>
    \nend<\/span><\/p>\n

    — 3. \u5224\u65ad\u662f\u5426\u91cd\u590d\u4e0b\u5355，\u91cd\u590d\u8fd4\u56de 2<\/span>
    \nif<\/span> (<\/span>redis.<\/span>call<\/span>(<\/span>'sismember'<\/span>,<\/span> orderKey,<\/span> userId)<\/span> ==<\/span> 1<\/span>)<\/span> then<\/span>
    \n return<\/span> 2<\/span>
    \nend<\/span><\/p>\n

    — 4. \u6263\u5e93\u5b58<\/span>
    \nredis.<\/span>call<\/span>(<\/span>'incrby'<\/span>,<\/span> stockKey,<\/span> –<\/span>1<\/span>)<\/span><\/p>\n

    — 5. \u8bb0\u5f55\u8be5\u7528\u6237\u5df2\u4e0b\u5355<\/span>
    \nredis.<\/span>call<\/span>(<\/span>'sadd'<\/span>,<\/span> orderKey,<\/span> userId)<\/span><\/p>\n

    — 6. \u53d1\u6d88\u606f\u5230 Stream（\u7b2c 7 \u7ae0\u843d\u5e93\u7528，\u4e0e\u6263\u5e93\u5b58\u540c\u4e00\u539f\u5b50\u64cd\u4f5c）<\/span>
    \nredis.<\/span>call<\/span>(<\/span>'xadd'<\/span>,<\/span> 'stream.orders'<\/span>,<\/span> '*'<\/span>,<\/span> 'userId'<\/span>,<\/span> userId,<\/span> 'voucherId'<\/span>,<\/span> voucherId,<\/span> 'id'<\/span>,<\/span> orderId)<\/span><\/p>\n

    — 7. \u8fd4\u56de 0 \u8868\u793a\u6709\u8d44\u683c<\/span>
    \nreturn<\/span> 0<\/span><\/p>\n

    \u6ce8\u610f\u7b2c 6 \u6b65：\u6d88\u606f\u6295\u9012\u4e5f\u5199\u5728 Lua \u91cc\u3002<\/p>\n

    \u8fd9\u4e00\u70b9\u7279\u522b\u91cd\u8981\u2014\u2014\u5982\u679c"\u6263\u5e93\u5b58"\u6210\u529f\u3001"\u53d1\u6d88\u606f"\u5931\u8d25，\u90a3\u5e93\u5b58\u767d\u6263\u4e86，\u8ba2\u5355\u6c38\u8fdc\u4e0d\u4f1a\u88ab\u521b\u5efa\u3002\u628a XADD \u653e\u8fdb Lua，\u6263\u5e93\u5b58\u548c\u53d1\u6d88\u606f\u5728\u540c\u4e00\u4e2a\u539f\u5b50\u64cd\u4f5c\u91cc，\u8981\u4e48\u90fd\u6210\u8981\u4e48\u90fd\u4e0d\u6210\u3002<\/p>\n

    \u7ea6\u5b9a\u7684\u8fd4\u56de\u503c<\/h4>\n

    \/\/ 0=\u6210\u529f，1=\u5e93\u5b58\u4e0d\u8db3，2=\u91cd\u590d\u4e0b\u5355<\/span>
    \nLong<\/span> result =<\/span> stringRedisTemplate.<\/span>execute<\/span>(<\/span>
    \n SECKILL_SCRIPT<\/span>,<\/span>
    \n Collections<\/span>.<\/span>emptyList<\/span>(<\/span>)<\/span>,<\/span>
    \n voucherId.<\/span>toString<\/span>(<\/span>)<\/span>,<\/span>
    \n userId.<\/span>toString<\/span>(<\/span>)<\/span>,<\/span>
    \n String<\/span>.<\/span>valueOf<\/span>(<\/span>orderId)<\/span>
    \n)<\/span>;<\/span>
    \nint<\/span> r =<\/span> result.<\/span>intValue<\/span>(<\/span>)<\/span>;<\/span>
    \nif<\/span> (<\/span>r !=<\/span> 0<\/span>)<\/span> {<\/span>
    \n return<\/span> Result<\/span>.<\/span>fail<\/span>(<\/span>r ==<\/span> 1<\/span> ?<\/span> "\u5e93\u5b58\u4e0d\u8db3"<\/span> :<\/span> "\u4e0d\u80fd\u91cd\u590d\u4e0b\u5355"<\/span>)<\/span>;<\/span>
    \n}<\/span>
    \nreturn<\/span> Result<\/span>.<\/span>ok<\/span>(<\/span>orderId)<\/span>;<\/span> \/\/ \u7acb\u523b\u8fd4\u56de，\u4e0d\u7b49\u843d\u5e93<\/span><\/p>\n

    \u63a5\u53e3\u5230\u8fd9\u91cc\u5c31\u8fd4\u56de\u4e86\u3002 \u4e00\u4e2a Lua \u8c03\u7528，\u4e00\u6b21\u7f51\u7edc\u5f80\u8fd4，\u6beb\u79d2\u7ea7\u3002<\/p>\n

    \u5b9e\u6d4b：\u76f4\u63a5\u7528 redis-cli \u9a8c\u8bc1 Lua<\/h4>\n

    \u5199\u4e1a\u52a1\u4ee3\u7801\u4e4b\u524d，\u6211\u5148\u7528 redis-cli \u624b\u5de5\u8dd1\u4e86 4 \u4e2a\u573a\u666f，\u786e\u8ba4\u8fd4\u56de\u503c\u7b26\u5408\u9884\u671f：<\/p>\n\n\u6b21\u5e8f\u573a\u666f\u8fd4\u56de\u503c\u5e93\u5b58\u53d8\u5316Set \u53d8\u5316<\/tr>\n\n\n\n\n\n
    1<\/td>\n\u7528\u6237 1001 \u6b63\u5e38\u62a2<\/td>\n0 \u2705<\/td>\n-1<\/td>\n+1001<\/td>\n<\/tr>\n
    2<\/td>\n\u7528\u6237 1002 \u6b63\u5e38\u62a2<\/td>\n0 \u2705<\/td>\n-1<\/td>\n+1002<\/td>\n<\/tr>\n
    3<\/td>\n\u7528\u6237 1001 \u91cd\u590d\u62a2<\/td>\n2 \u2705<\/td>\n\u4e0d\u53d8<\/td>\n\u4e0d\u53d8<\/td>\n<\/tr>\n
    4<\/td>\n\u5e93\u5b58 0 \u65f6\u518d\u62a2<\/td>\n1 \u2705<\/td>\n\u4e0d\u53d8<\/td>\n\u4e0d\u53d8<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    \u5148\u5355\u72ec\u9a8c\u8bc1\u811a\u672c\u903b\u8f91，\u518d\u63a5\u5165\u4e1a\u52a1\u2014\u2014\u8fd9\u4e2a\u4e60\u60ef\u5e2e\u6211\u7701\u4e86\u5f88\u591a\u4e8b\u3002Lua \u51fa\u9519\u65f6 Redis \u62a5\u9519\u4fe1\u606f\u5f88\u4e0d\u53cb\u597d，\u6df7\u5728 Java \u8c03\u7528\u91cc\u6392\u67e5\u4f1a\u5f88\u75db\u82e6\u3002<\/p>\n

    \u56db\u3001\u7b2c\u4e8c\u6b65：\u5f02\u6b65\u843d\u5e93\u2014\u2014\u5148\u4e0a\u963b\u585e\u961f\u5217<\/h3>\n

    \u8d44\u683c\u5224\u65ad\u5b8c，\u8ba2\u5355\u4fe1\u606f\u5728 Redis \u91cc，\u63a5\u4e0b\u6765\u8981\u771f\u6b63\u5199\u6570\u636e\u5e93\u3002\u7b2c\u4e00\u4e2a\u7248\u672c\u7528\u963b\u585e\u961f\u5217：<\/p>\n

    \/\/ \u521d\u59cb\u5316：\u5355\u7ebf\u7a0b\u6c60 + \u963b\u585e\u961f\u5217<\/span>
    \nprivate<\/span> BlockingQueue<\/span><<\/span>VoucherOrder<\/span>><\/span><\/span> orderTasks =<\/span> new<\/span> ArrayBlockingQueue<\/span><<\/span>><\/span><\/span>(<\/span>1024<\/span> *<\/span> 1024<\/span>)<\/span>;<\/span><\/p>\n

    @PostConstruct<\/span>
    \nprivate<\/span> void<\/span> init<\/span>(<\/span>)<\/span> {<\/span>
    \n SECKILL_ORDER_EXECUTOR<\/span>.<\/span>submit<\/span>(<\/span>new<\/span> VoucherOrderHandler<\/span>(<\/span>)<\/span>)<\/span>;<\/span>
    \n}<\/span><\/p>\n

    \/\/ \u5165\u53e3：Lua \u5224\u65ad\u901a\u8fc7\u540e，\u628a\u8ba2\u5355\u4e22\u8fdb\u961f\u5217\u5c31\u8fd4\u56de<\/span>
    \norderTasks.<\/span>add<\/span>(<\/span>order)<\/span>;<\/span>
    \nreturn<\/span> Result<\/span>.<\/span>ok<\/span>(<\/span>orderId)<\/span>;<\/span><\/p>\n

    \/\/ \u540e\u53f0\u7ebf\u7a0b：\u4e0d\u505c\u4ece\u961f\u5217\u53d6，\u843d\u5e93<\/span>
    \nprivate<\/span> class<\/span> VoucherOrderHandler<\/span> implements<\/span> Runnable<\/span> {<\/span>
    \n public<\/span> void<\/span> run<\/span>(<\/span>)<\/span> {<\/span>
    \n while<\/span> (<\/span>true<\/span>)<\/span> {<\/span>
    \n VoucherOrder<\/span> order =<\/span> orderTasks.<\/span>take<\/span>(<\/span>)<\/span>;<\/span> \/\/ \u961f\u5217\u7a7a\u5c31\u963b\u585e\u7b49<\/span>
    \n handleVoucherOrder<\/span>(<\/span>order)<\/span>;<\/span>
    \n }<\/span>
    \n }<\/span>
    \n}<\/span><\/p>\n

    \u4e3a\u4ec0\u4e48\u7528\u5355\u7ebf\u7a0b\u6c60？ \u56e0\u4e3a\u843d\u5e93\u662f IO \u5bc6\u96c6\u578b，\u5982\u679c\u5f00\u591a\u7ebf\u7a0b，\u591a\u4e2a\u7ebf\u7a0b\u540c\u65f6\u62a2\u6570\u636e\u5e93\u884c\u9501，\u53cd\u800c\u589e\u52a0\u51b2\u7a81\u3002\u5355\u7ebf\u7a0b\u4e32\u884c\u843d\u5e93，\u6570\u636e\u5e93\u538b\u529b\u6700\u5c0f\u3002<\/p>\n

    \u8dd1\u8d77\u6765\u786e\u5b9e\u5feb\u4e86\u5f88\u591a\u3002\u4f46\u963b\u585e\u961f\u5217\u6709\u4e24\u4e2a\u89e3\u51b3\u4e0d\u4e86\u7684\u95ee\u9898：<\/p>\n\n\u95ee\u9898\u540e\u679c<\/tr>\n\n\n\n
    \u5185\u5b58\u9650\u5236<\/td>\n\u961f\u5217\u5728 JVM \u5806\u91cc，\u8ba2\u5355\u591a\u4e86\u5185\u5b58\u6491\u7206 \u2192 OOM<\/td>\n<\/tr>\n
    \u6570\u636e\u5b89\u5168<\/td>\nJVM \u4e00\u6302，\u961f\u5217\u91cc\u6ca1\u6d88\u8d39\u5b8c\u7684\u8ba2\u5355\u5168\u4e22，\u4e14\u65e0\u6cd5\u6062\u590d<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    \u4e94\u3001\u2605 \u6211\u5b9e\u6d4b\u5230\u4e86"\u4e22\u5355"：95 \u5355\u76f4\u63a5\u6ca1\u4e86<\/h3>\n

    \u7b2c\u4e8c\u4e2a\u95ee\u9898\u6211\u6ca1\u505c\u7559\u5728"\u7406\u8bba\u4e0a\u4f1a\u4e22"，\u800c\u662f\u771f\u53bb\u6d4b\u4e86\u3002<\/p>\n

    \u7528\u540c\u6837\u7684\u538b\u6d4b（100 \u4e2a\u8ba2\u5355），\u5206\u522b\u5728\u4e24\u79cd\u73af\u5883\u8dd1：<\/p>\n\n\u73af\u5883\u8017\u65f6\u9884\u671f\u8ba2\u5355\u5b9e\u9645\u8ba2\u5355\u7ed3\u679c<\/tr>\n\n\n\n
    \u6d4b\u8bd5\u73af\u5883（@SpringBootTest）<\/td>\n\u2014<\/td>\n100 \u5355<\/td>\n\u4ec5 5 \u5355 \u274c<\/td>\n\u4e22 95 \u5355<\/td>\n<\/tr>\n
    \u771f\u5b9e\u5e94\u7528（jar \u5e38\u9a7b\u8fd0\u884c）<\/td>\n4.6 \u79d2<\/td>\n100 \u5355<\/td>\n100 \u5355 \u2705<\/td>\n5 \u79d2\u5185\u6d88\u5316\u5b8c，\u96f6\u8d85\u5356<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    \u4e3a\u4ec0\u4e48\u6d4b\u8bd5\u73af\u5883\u4e22\u4e86 95 \u5355？<\/p>\n

    \u6211\u4e00\u5f00\u59cb\u4ee5\u4e3a\u662f\u4ee3\u7801\u6709 bug，\u67e5\u4e86\u5f88\u4e45\u3002\u771f\u76f8\u662f\u2014\u2014<\/p>\n

    \u6d4b\u8bd5\u65b9\u6cd5\u8dd1\u5b8c，Spring \u5bb9\u5668\u5c31\u5173\u95ed\u4e86 \u2192 JVM \u9000\u51fa \u2192 \u540e\u53f0\u6d88\u8d39\u7ebf\u7a0b\u88ab\u6740\u3002<\/p>\n

    \u961f\u5217\u91cc\u8fd8\u6ca1\u843d\u5e93\u7684 95 \u4e2a\u8ba2\u5355，\u968f\u7740 JVM \u4e00\u8d77\u6d88\u5931\u3002<\/p>\n

    \u8fd9\u662f\u4e2a\u5f88\u5bb9\u6613\u8bef\u5224\u7684\u5751：\u6211\u5dee\u70b9\u56e0\u4e3a\u6d4b\u8bd5\u73af\u5883\u7684\u6570\u5b57\u53bb\u6539\u672c\u6765\u6b63\u786e\u7684\u4ee3\u7801\u3002\u6559\u8bad\u662f\u2014\u2014<\/p>\n

    \u5f02\u6b65\u903b\u8f91\u4e0d\u80fd\u7528 @SpringBootTest \u9a8c\u8bc1\u5b8c\u6574\u6d41\u7a0b\u3002
    \n\u5bb9\u5668\u5173\u95ed\u4f1a\u4e2d\u65ad\u540e\u53f0\u7ebf\u7a0b，\u4f60\u6d4b\u5230\u7684\u4e0d\u662f"\u4ee3\u7801\u4e0d\u5de5\u4f5c"，\u800c\u662f"\u6d4b\u8bd5\u73af\u5883\u6d3b\u4e0d\u5230\u5de5\u4f5c\u5b8c\u6210"\u3002
    \n\u8981\u9a8c\u8bc1\u5f02\u6b65\u94fe\u8def，\u5fc5\u987b\u7528\u5e38\u9a7b\u8fdb\u7a0b（jar \u8dd1\u8d77\u6765）\u538b\u3002<\/p>\n

    \u6362\u6210 jar \u5e38\u9a7b\u540e：4.6 \u79d2\u843d\u5b8c 100 \u5355，\u96f6\u8d85\u5356\u3002 \u6570\u636e\u5bf9\u4e0a\u4e86\u3002<\/p>\n

    \u516d\u3001\u7b2c\u4e09\u6b65：\u6362\u6210 Redis Stream（\u89e3\u51b3\u4e22\u5355）<\/h3>\n

    \u4e22\u5355\u7684\u6839\u6e90\u662f"\u961f\u5217\u5728 JVM \u5185\u5b58\u91cc"\u3002\u90a3\u5c31\u628a\u5b83\u632a\u5230 Redis\u2014\u2014\u7528 Stream\u3002<\/p>\n

    Stream \u662f Redis \u4e13\u95e8\u4e3a\u6d88\u606f\u961f\u5217\u8bbe\u8ba1\u7684\u6570\u636e\u7ed3\u6784，\u6bd4 List \u66f4\u9002\u5408\u8fd9\u4e2a\u573a\u666f：<\/p>\n\n\u7279\u6027\u8bf4\u660e<\/tr>\n\n\n\n\n
    \u6301\u4e45\u5316<\/td>\n\u6d88\u606f\u5728 Redis \u91cc，JVM \u6302\u4e86\u4e0d\u4e22<\/td>\n<\/tr>\n
    \u6d88\u8d39\u8005\u7ec4<\/td>\n\u591a\u4e2a\u6d88\u8d39\u8005\u5206\u5de5，\u5904\u7406\u8fc7\u7684\u4f1a\u88ab\u8bb0\u5f55<\/td>\n<\/tr>\n
    pending \u5217\u8868<\/td>\n\u6d88\u8d39\u4e86\u4f46\u6ca1\u786e\u8ba4\u7684\u6d88\u606f\u7559\u5728 pending，\u53ef\u4ee5\u91cd\u8bd5 \u2b50<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    "pending \u5217\u8868"\u662f\u5173\u952e\u2014\u2014\u5b83\u89e3\u51b3\u4e86"\u6d88\u606f\u53d6\u51fa\u6765\u4f46\u5904\u7406\u5931\u8d25\u600e\u4e48\u529e"\u8fd9\u4e2a\u95ee\u9898\u3002\u963b\u585e\u961f\u5217\u7248\u91cc，\u5982\u679c\u843d\u5e93\u629b\u5f02\u5e38，\u90a3\u6761\u8ba2\u5355\u5c31\u6ca1\u4e86\u3002<\/p>\n

    \u6d88\u8d39\u7aef\u4ee3\u7801：<\/p>\n

    \/** \u542f\u52a8\u540e\u53f0\u6d88\u8d39\u7ebf\u7a0b *\/<\/span>
    \n@PostConstruct<\/span>
    \nprivate<\/span> void<\/span> init<\/span>(<\/span>)<\/span> {<\/span>
    \n \/\/ 1. \u62ff\u4ee3\u7406\u5bf9\u8c61（getBean \u8fd4\u56de\u7684\u5c31\u662f\u4e8b\u52a1\u4ee3\u7406，\u65e0\u9700 AopContext）<\/span>
    \n proxy =<\/span> applicationContext.<\/span>getBean<\/span>(<\/span>IVoucherOrderService<\/span>.<\/span>class<\/span>)<\/span>;<\/span>
    \n \/\/ 2. \u521b\u5efa\u6d88\u8d39\u8005\u7ec4，\u4ece "0" \u5f00\u59cb\u6d88\u8d39（\u9ed8\u8ba4 $ \u4f1a\u8df3\u8fc7\u5386\u53f2\u6d88\u606f）<\/span>
    \n try<\/span> {<\/span>
    \n stringRedisTemplate.<\/span>opsForStream<\/span>(<\/span>)<\/span>
    \n .<\/span>createGroup<\/span>(<\/span>"stream.orders"<\/span>,<\/span> ReadOffset<\/span>.<\/span>from<\/span>(<\/span>"0"<\/span>)<\/span>,<\/span> "g1"<\/span>)<\/span>;<\/span>
    \n }<\/span> catch<\/span> (<\/span>Exception<\/span> e)<\/span> {<\/span>
    \n log.<\/span>debug<\/span>(<\/span>"\u6d88\u8d39\u8005\u7ec4 g1 \u5df2\u5b58\u5728"<\/span>)<\/span>;<\/span>
    \n }<\/span>
    \n \/\/ 3. \u63d0\u4ea4\u540e\u53f0\u6d88\u8d39\u7ebf\u7a0b<\/span>
    \n SECKILL_ORDER_EXECUTOR<\/span>.<\/span>submit<\/span>(<\/span>new<\/span> VoucherOrderHandler<\/span>(<\/span>)<\/span>)<\/span>;<\/span>
    \n}<\/span><\/p>\n

    \u7b2c 2 \u6b65\u90a3\u4e2a ReadOffset.from("0") \u662f\u4e2a\u5751\u3002 \u9ed8\u8ba4\u662f $，\u610f\u601d\u662f"\u53ea\u6d88\u8d39\u4ece\u73b0\u5728\u5f00\u59cb\u7684\u65b0\u6d88\u606f"\u2014\u2014\u670d\u52a1\u91cd\u542f\u65f6 Stream \u91cc\u79ef\u538b\u7684\u6d88\u606f\u4f1a\u88ab\u5168\u90e8\u8df3\u8fc7\u3002\u5fc5\u987b\u7528 "0" \u4ece\u5934\u8bfb\u3002<\/p>\n

    \u771f\u6b63\u5904\u7406\u6d88\u606f\u7684\u5faa\u73af：<\/p>\n

    public<\/span> void<\/span> run<\/span>(<\/span>)<\/span> {<\/span>
    \n while<\/span> (<\/span>true<\/span>)<\/span> {<\/span>
    \n try<\/span> {<\/span>
    \n \/\/ 1. XREADGROUP：\u8bfb 1 \u6761，\u963b\u585e 2 \u79d2，\u4ece ">" \u8bfb\u65b0\u6d88\u606f<\/span>
    \n List<\/span><<\/span>MapRecord<\/span><<\/span>String<\/span>,<\/span> Object<\/span>,<\/span> Object<\/span>><\/span>><\/span><\/span> list =<\/span> stringRedisTemplate.<\/span>opsForStream<\/span>(<\/span>)<\/span>.<\/span>read<\/span>(<\/span>
    \n Consumer<\/span>.<\/span>from<\/span>(<\/span>"g1"<\/span>,<\/span> "c1"<\/span>)<\/span>,<\/span>
    \n StreamReadOptions<\/span>.<\/span>empty<\/span>(<\/span>)<\/span>.<\/span>count<\/span>(<\/span>1<\/span>)<\/span>.<\/span>block<\/span>(<\/span>Duration<\/span>.<\/span>ofSeconds<\/span>(<\/span>2<\/span>)<\/span>)<\/span>,<\/span>
    \n StreamOffset<\/span>.<\/span>create<\/span>(<\/span>"stream.orders"<\/span>,<\/span> ReadOffset<\/span>.<\/span>lastConsumed<\/span>(<\/span>)<\/span>)<\/span>
    \n )<\/span>;<\/span>
    \n if<\/span> (<\/span>list ==<\/span> null<\/span> ||<\/span> list.<\/span>isEmpty<\/span>(<\/span>)<\/span>)<\/span> {<\/span>
    \n continue<\/span>;<\/span>
    \n }<\/span>
    \n \/\/ 2. \u89e3\u6790\u6d88\u606f\u4e3a VoucherOrder<\/span>
    \n MapRecord<\/span><<\/span>String<\/span>,<\/span> Object<\/span>,<\/span> Object<\/span>><\/span><\/span> record =<\/span> list.<\/span>get<\/span>(<\/span>0<\/span>)<\/span>;<\/span>
    \n VoucherOrder<\/span> voucherOrder =<\/span> BeanUtil<\/span>.<\/span>fillBeanWithMap<\/span>(<\/span>
    \n record.<\/span>getValue<\/span>(<\/span>)<\/span>,<\/span> new<\/span> VoucherOrder<\/span>(<\/span>)<\/span>,<\/span> true<\/span>)<\/span>;<\/span>
    \n \/\/ 3. \u5904\u7406\u8ba2\u5355<\/span>
    \n handleVoucherOrder<\/span>(<\/span>voucherOrder)<\/span>;<\/span>
    \n \/\/ 4. \u786e\u8ba4\u6d88\u606f（\u79fb\u51fa pending）<\/span>
    \n stringRedisTemplate.<\/span>opsForStream<\/span>(<\/span>)<\/span>.<\/span>acknowledge<\/span>(<\/span>"g1"<\/span>,<\/span> record)<\/span>;<\/span>
    \n }<\/span> catch<\/span> (<\/span>Exception<\/span> e)<\/span> {<\/span>
    \n log.<\/span>error<\/span>(<\/span>"\u5904\u7406\u8ba2\u5355\u5f02\u5e38"<\/span>,<\/span> e)<\/span>;<\/span>
    \n \/\/ 5. \u51fa\u5f02\u5e38\u65f6\u5904\u7406 pending \u5217\u8868<\/span>
    \n handlePendingList<\/span>(<\/span>)<\/span>;<\/span>
    \n }<\/span>
    \n }<\/span>
    \n}<\/span><\/p>\n

    ReadOffset.lastConsumed() \u5bf9\u5e94 >，\u610f\u601d\u662f"\u53ea\u8bfb\u8fd8\u6ca1\u6295\u9012\u7ed9\u8fd9\u4e2a\u6d88\u8d39\u8005\u7684\u65b0\u6d88\u606f"\u3002<\/p>\n

    \u7b2c 4 \u6b65\u7684 acknowledge \u4e0d\u80fd\u6f0f\u3002 \u4e0d ACK \u7684\u8bdd，\u6d88\u606f\u4f1a\u4e00\u76f4\u505c\u5728 pending \u5217\u8868\u91cc，\u867d\u7136\u4e0d\u4f1a\u4e22，\u4f46\u4f1a\u88ab\u91cd\u590d\u5904\u7406\u3002<\/p>\n

    \u5f02\u5e38\u65f6\u5904\u7406\u7684\u6b63\u662f pending \u5217\u8868：<\/p>\n

    private<\/span> void<\/span> handlePendingList<\/span>(<\/span>)<\/span> {<\/span>
    \n while<\/span> (<\/span>true<\/span>)<\/span> {<\/span>
    \n try<\/span> {<\/span>
    \n \/\/ \u4ece pending \u5217\u8868\u8bfb（\u8d77\u59cb ID \u7528 "0"）<\/span>
    \n List<\/span><<\/span>MapRecord<\/span><<\/span>String<\/span>,<\/span> Object<\/span>,<\/span> Object<\/span>><\/span>><\/span><\/span> list =<\/span> stringRedisTemplate.<\/span>opsForStream<\/span>(<\/span>)<\/span>.<\/span>read<\/span>(<\/span>
    \n Consumer<\/span>.<\/span>from<\/span>(<\/span>"g1"<\/span>,<\/span> "c1"<\/span>)<\/span>,<\/span>
    \n StreamReadOptions<\/span>.<\/span>empty<\/span>(<\/span>)<\/span>.<\/span>count<\/span>(<\/span>1<\/span>)<\/span>,<\/span>
    \n StreamOffset<\/span>.<\/span>create<\/span>(<\/span>"stream.orders"<\/span>,<\/span> ReadOffset<\/span>.<\/span>from<\/span>(<\/span>"0"<\/span>)<\/span>)<\/span>
    \n )<\/span>;<\/span>
    \n if<\/span> (<\/span>list ==<\/span> null<\/span> ||<\/span> list.<\/span>isEmpty<\/span>(<\/span>)<\/span>)<\/span> {<\/span>
    \n break<\/span>;<\/span> \/\/ pending \u7a7a\u4e86\u5c31\u9000\u51fa<\/span>
    \n }<\/span>
    \n MapRecord<\/span><<\/span>String<\/span>,<\/span> Object<\/span>,<\/span> Object<\/span>><\/span><\/span> record =<\/span> list.<\/span>get<\/span>(<\/span>0<\/span>)<\/span>;<\/span>
    \n VoucherOrder<\/span> voucherOrder =<\/span> BeanUtil<\/span>.<\/span>fillBeanWithMap<\/span>(<\/span>
    \n record.<\/span>getValue<\/span>(<\/span>)<\/span>,<\/span> new<\/span> VoucherOrder<\/span>(<\/span>)<\/span>,<\/span> true<\/span>)<\/span>;<\/span>
    \n handleVoucherOrder<\/span>(<\/span>voucherOrder)<\/span>;<\/span>
    \n stringRedisTemplate.<\/span>opsForStream<\/span>(<\/span>)<\/span>.<\/span>acknowledge<\/span>(<\/span>"g1"<\/span>,<\/span> record)<\/span>;<\/span>
    \n }<\/span> catch<\/span> (<\/span>Exception<\/span> e)<\/span> {<\/span>
    \n log.<\/span>error<\/span>(<\/span>"\u5904\u7406 pending \u8ba2\u5355\u5f02\u5e38"<\/span>,<\/span> e)<\/span>;<\/span>
    \n try<\/span> {<\/span> Thread<\/span>.<\/span>sleep<\/span>(<\/span>20<\/span>)<\/span>;<\/span> }<\/span> catch<\/span> (<\/span>InterruptedException<\/span> ex)<\/span> {<\/span> }<\/span>
    \n }<\/span>
    \n }<\/span>
    \n}<\/span><\/p>\n

    \u4e03\u3001\u843d\u5e93\u90a3\u4e00\u6b65：\u4e00\u4eba\u4e00\u5355\u8981\u518d\u515c\u4e00\u6b21<\/h3>\n

    \u5f02\u6b65\u94fe\u8def\u91cc\u6709\u4e2a\u5bb9\u6613\u88ab\u5ffd\u7565\u7684\u95ee\u9898：Redis \u53ef\u80fd\u4e22\u6570\u636e\u3002（\u4e3b\u4ece\u5207\u6362\u3001\u5185\u5b58\u6dd8\u6c70\u90fd\u53ef\u80fd）<\/p>\n

    \u6240\u4ee5\u771f\u6b63\u843d\u5e93\u65f6，\u6570\u636e\u5e93\u8981\u518d\u67e5\u4e00\u6b21：<\/p>\n

    @Override<\/span>
    \n@Transactional<\/span>
    \npublic<\/span> void<\/span> createVoucherOrder<\/span>(<\/span>VoucherOrder<\/span> voucherOrder)<\/span> {<\/span>
    \n \/\/ 1. \u4e00\u4eba\u4e00\u5355\u515c\u5e95：Redis \u53ef\u80fd\u4e22\u6570\u636e，\u6570\u636e\u5e93\u518d\u67e5\u4e00\u6b21<\/span>
    \n Long<\/span> userId =<\/span> voucherOrder.<\/span>getUserId<\/span>(<\/span>)<\/span>;<\/span>
    \n int<\/span> count =<\/span> query<\/span>(<\/span>)<\/span>.<\/span>eq<\/span>(<\/span>"user_id"<\/span>,<\/span> userId)<\/span>
    \n .<\/span>eq<\/span>(<\/span>"voucher_id"<\/span>,<\/span> voucherOrder.<\/span>getVoucherId<\/span>(<\/span>)<\/span>)<\/span>.<\/span>count<\/span>(<\/span>)<\/span>;<\/span>
    \n if<\/span> (<\/span>count ><\/span> 0<\/span>)<\/span> {<\/span>
    \n throw<\/span> new<\/span> RuntimeException<\/span>(<\/span>"\u7528\u6237\u5df2\u7ecf\u8d2d\u4e70\u8fc7\u4e00\u6b21！"<\/span>)<\/span>;<\/span>
    \n }<\/span><\/p>\n

    \/\/ 2. \u6263\u5e93\u5b58：WHERE \u5e26 stock > 0，\u7531\u6570\u636e\u5e93\u5728\u884c\u9501\u5185\u5b8c\u6210"\u5224\u65ad+\u6263\u51cf"，\u9632\u8d85\u5356<\/span>
    \n boolean<\/span> success =<\/span> seckillVoucherService.<\/span>update<\/span>(<\/span>)<\/span>
    \n .<\/span>setSql<\/span>(<\/span>"stock = stock – 1"<\/span>)<\/span>
    \n .<\/span>eq<\/span>(<\/span>"voucher_id"<\/span>,<\/span> voucherOrder.<\/span>getVoucherId<\/span>(<\/span>)<\/span>)<\/span>
    \n .<\/span>gt<\/span>(<\/span>"stock"<\/span>,<\/span> 0<\/span>)<\/span>
    \n .<\/span>update<\/span>(<\/span>)<\/span>;<\/span>
    \n if<\/span> (<\/span>!<\/span>success)<\/span> {<\/span>
    \n throw<\/span> new<\/span> RuntimeException<\/span>(<\/span>"\u5e93\u5b58\u4e0d\u8db3！"<\/span>)<\/span>;<\/span>
    \n }<\/span><\/p>\n

    \/\/ 3. \u4fdd\u5b58\u8ba2\u5355<\/span>
    \n save<\/span>(<\/span>voucherOrder)<\/span>;<\/span>
    \n}<\/span><\/p>\n

    \u8fd9\u4e09\u6b65\u5728\u540c\u4e00\u4e2a @Transactional \u91cc，\u4efb\u4f55\u4e00\u6b65\u5931\u8d25\u6574\u4f53\u56de\u6eda\u3002<\/p>\n

    \u6ce8\u610f\u8fd9\u91cc stock > 0 \u53c8\u51fa\u73b0\u4e86\u4e00\u6b21\u2014\u2014Redis \u5224\u8fc7\u4e00\u6b21，\u6570\u636e\u5e93\u8fd8\u8981\u518d\u5224\u4e00\u6b21\u3002\u8fd9\u4e0d\u662f\u91cd\u590d\u52b3\u52a8，\u662f\u7eb5\u6df1\u9632\u5fa1：Redis \u90a3\u8fb9\u662f"\u6321\u4f4f\u7edd\u5927\u591a\u6570\u8bf7\u6c42"，\u6570\u636e\u5e93\u8fd9\u8fb9\u662f"\u6700\u540e\u515c\u5e95"\u3002<\/p>\n

    \u516b\u3001\u4e09\u7ea7\u706b\u7bad：\u4e09\u5c42\u4f18\u5316\u5bf9\u6bd4<\/h3>\n\n\u65b9\u6848\u8d44\u683c\u5224\u65ad\u843d\u5e93200 \u5e76\u53d1\u8017\u65f6\u95ee\u9898<\/tr>\n\n\n\n\n
    \u539f\u59cb<\/td>\nMySQL 6 \u6b65\u4e32\u884c<\/td>\n\u540c\u6b65<\/td>\n3.4 \u79d2<\/td>\n\u6570\u636e\u5e93\u88ab\u6253\u6ee1<\/td>\n<\/tr>\n
    \u963b\u585e\u961f\u5217<\/td>\nLua（Redis \u539f\u5b50）<\/td>\n\u5f02\u6b65\u5355\u7ebf\u7a0b<\/td>\n\u6beb\u79d2\u7ea7\u54cd\u5e94<\/td>\nJVM \u6302 = \u4e22\u5355（\u5b9e\u6d4b\u4e22 95\/100）<\/td>\n<\/tr>\n
    Redis Stream<\/td>\nLua（Redis \u539f\u5b50）<\/td>\n\u5f02\u6b65 + \u6301\u4e45\u5316 + pending<\/td>\n\u6beb\u79d2\u7ea7\u54cd\u5e94，4.6 \u79d2\u843d\u5b8c 100 \u5355<\/td>\n\u9700\u5904\u7406\u6d88\u606f\u79ef\u538b<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    \u4e09\u7ea7\u6f14\u8fdb，\u6bcf\u6b21\u90fd\u5728\u89e3\u51b3\u4e0a\u4e00\u7ea7\u7684\u5177\u4f53\u95ee\u9898：<\/p>\n

  • \u539f\u59cb \u2192 \u963b\u585e\u961f\u5217：\u628a"\u5feb\u5224\u65ad"\u548c"\u6162\u843d\u5e93"\u62c6\u5f00，\u54cd\u5e94\u4ece 3.4 \u79d2\u53d8\u6210\u6beb\u79d2\u7ea7<\/li>\n
  • \u963b\u585e\u961f\u5217 \u2192 Stream：\u56e0\u4e3a\u5b9e\u6d4b\u4e22\u5355，\u628a\u961f\u5217\u4ece JVM \u632a\u5230 Redis，\u52a0\u6301\u4e45\u5316\u548c pending \u91cd\u8bd5<\/li>\n

    \u4e5d\u3001\u9762\u8bd5\u600e\u4e48\u7b54（\u53ef\u76f4\u63a5\u80cc）<\/h3>\n

    \u95ee：\u79d2\u6740\u600e\u4e48\u4f18\u5316\u7684？<\/p>\n

    "\u539f\u6765 6 \u4e2a\u6b65\u9aa4\u5168\u90e8\u6253 MySQL\u3001\u5355\u7ebf\u7a0b\u4e32\u884c，200 \u5e76\u53d1\u62a2 100 \u5e93\u5b58\u8981 3.4 \u79d2\u3002<\/p>\n

    \u4f18\u5316\u7684\u6838\u5fc3\u601d\u8def\u662f\u628a\u540c\u6b65\u6d41\u7a0b\u62c6\u6210\u4e24\u6bb5：\u8d44\u683c\u5224\u65ad\u653e Redis \u7528 Lua \u811a\u672c\u539f\u5b50\u6267\u884c，\u843d\u5e93\u4ea4\u7ed9\u5f02\u6b65\u7ebf\u7a0b\u3002\u56e0\u4e3a\u7528\u6237\u53ea\u5173\u5fc3\u2019\u62a2\u6ca1\u62a2\u5230\u2019，\u4e0d\u5173\u5fc3\u8ba2\u5355\u4ec0\u4e48\u65f6\u5019\u771f\u7684\u5199\u8fdb\u5e93\u2014\u2014\u65f6\u6548\u6027\u662f\u4f2a\u9700\u6c42\u3002<\/p>\n

    \u8d44\u683c\u5224\u65ad\u7684\u6570\u636e\u7ed3\u6784：\u5e93\u5b58\u7528 String，\u5df2\u4e0b\u5355\u7528\u6237\u7528 Set（SISMEMBER \u5929\u7136\u9002\u5408\u4e00\u4eba\u4e00\u5355）\u3002Lua \u91cc\u4e00\u6b21\u6027\u5b8c\u6210\u2019\u5224\u5e93\u5b58 \u2192 \u5224\u91cd\u590d \u2192 \u6263\u5e93\u5b58 \u2192 \u8bb0\u7528\u6237 \u2192 \u53d1\u6d88\u606f\u2019，\u8fd4\u56de 0\/1\/2 \u4e09\u79cd\u72b6\u6001\u3002<\/p>\n

    \u5f02\u6b65\u843d\u5e93\u7b2c\u4e00\u7248\u7528\u963b\u585e\u961f\u5217，\u4f46\u961f\u5217\u5728 JVM \u5185\u5b58\u91cc，JVM \u4e00\u6302\u5c31\u4e22\u5355\u2014\u2014\u8fd9\u4e2a\u6211\u5b9e\u6d4b\u8fc7，\u6d4b\u8bd5\u73af\u5883 100 \u5355\u4e22\u4e86 95 \u5355\u3002\u6240\u4ee5\u6362\u6210 Redis Stream，\u6d88\u606f\u6301\u4e45\u5316，\u914d\u5408\u6d88\u8d39\u8005\u7ec4\u548c pending \u5217\u8868，\u5904\u7406\u5931\u8d25\u8fd8\u80fd\u91cd\u8bd5\u3002<\/p>\n

    \u6700\u7ec8：\u6beb\u79d2\u7ea7\u54cd\u5e94，4.6 \u79d2\u843d\u5b8c 100 \u5355，\u96f6\u8d85\u5356\u3002"<\/p>\n

    \u5982\u679c\u88ab\u8ffd\u95ee"\u6d88\u606f\u53d1\u5931\u8d25\u4e86\u600e\u4e48\u529e"：<\/p>\n

    \u201cXADD \u76f4\u63a5\u5199\u5728 Lua \u811a\u672c\u91cc，\u548c\u6263\u5e93\u5b58\u662f\u540c\u4e00\u4e2a\u539f\u5b50\u64cd\u4f5c\u3002\u8981\u4e48\u90fd\u6210\u529f，\u8981\u4e48\u90fd\u4e0d\u6210\u529f，\u4e0d\u4f1a\u51fa\u73b0\u2019\u5e93\u5b58\u6263\u4e86\u4f46\u6d88\u606f\u6ca1\u53d1\u2019\u3002\u201d<\/p>\n

    \u5982\u679c\u88ab\u8ffd\u95ee"Stream \u7684\u5751"：<\/p>\n

    \u201c\u4e24\u4e2a：\u4e00\u662f\u521b\u5efa\u6d88\u8d39\u8005\u7ec4\u65f6 ReadOffset \u9ed8\u8ba4\u662f $，\u4f1a\u8df3\u8fc7\u91cd\u542f\u524d\u79ef\u538b\u7684\u6d88\u606f，\u5fc5\u987b\u7528 '0' \u4ece\u5934\u8bfb；\u4e8c\u662f\u5904\u7406\u5b8c\u5fc5\u987b ACK，\u5426\u5219\u6d88\u606f\u4e00\u76f4\u505c\u5728 pending \u5217\u8868\u91cc\u88ab\u91cd\u590d\u5904\u7406\u3002\u201d<\/p>\n

    \u5982\u679c\u88ab\u8ffd\u95ee"\u5f02\u6b65\u4e86\u600e\u4e48\u4fdd\u8bc1\u4e0d\u8d85\u5356"：<\/p>\n

    \u201c\u4e24\u9053\u9632\u7ebf：Redis \u7684 Lua \u5df2\u7ecf\u539f\u5b50\u6263\u8fc7\u5e93\u5b58，\u6321\u4f4f\u7edd\u5927\u90e8\u5206；\u6570\u636e\u5e93\u90a3\u6761 UPDATE … WHERE stock > 0 \u518d\u515c\u4e00\u6b21\u3002Redis \u53ef\u80fd\u4e22\u6570\u636e，\u6570\u636e\u5e93\u8fd9\u9053\u624d\u662f\u6700\u540e\u4fdd\u8bc1\u3002\u201d<\/p>\n

    \u5341\u3001\u5c0f\u7ed3<\/h3>\n

    \u8fd9\u4e00\u7ae0\u6700\u5927\u7684\u6536\u83b7\u4e0d\u662f"\u4f1a\u7528 Stream"，\u800c\u662f\u4e09\u4e2a\u5224\u65ad：<\/p>\n

  • \u5148\u95ee"\u7528\u6237\u771f\u6b63\u8981\u4ec0\u4e48"\u3002\u7528\u6237\u8981\u7684\u662f"\u62a2\u6ca1\u62a2\u5230"，\u4e0d\u662f"\u6570\u636e\u4f55\u65f6\u843d\u5e93"\u3002\u60f3\u6e05\u8fd9\u4e00\u70b9，"\u540c\u6b65\u6539\u5f02\u6b65"\u624d\u6210\u7acb\u3002\u6280\u672f\u65b9\u6848\u7684\u8d77\u70b9\u662f\u9700\u6c42\u8fb9\u754c，\u4e0d\u662f\u6280\u672f\u672c\u8eab\u3002<\/li>\n
  • \u5f02\u6b65\u5fc5\u7136\u5e26\u6765"\u4e22"\u7684\u98ce\u9669，\u8981\u4e3b\u52a8\u53bb\u6d4b\u3002\u963b\u585e\u961f\u5217\u7248\u770b\u8d77\u6765\u4e00\u5207\u6b63\u5e38，\u662f\u538b\u6d4b\u628a\u5b83\u6233\u7a7f\u7684\u3002<\/li>\n
  • \u6d4b\u8bd5\u73af\u5883\u6d4b\u4e0d\u51fa\u5f02\u6b65\u94fe\u8def\u3002@SpringBootTest \u5bb9\u5668\u4f1a\u5173\u95ed，\u6d4b\u5230\u7684"\u4e22\u5355"\u662f\u73af\u5883\u9020\u6210\u7684\u5047\u8c61\u3002\u5f02\u6b65\u5fc5\u987b\u7528\u5e38\u9a7b\u8fdb\u7a0b\u9a8c\u8bc1\u3002<\/li>\n
    \n

    \u6211\u662f\u6b63\u5728\u51c6\u5907 Java \u540e\u7aef\u79cb\u62db\u7684\u5e94\u5c4a\u751f，\u628a\u9879\u76ee\u91cc\u8e29\u8fc7\u7684\u5751\u6309"\u6539\u574f\u2014\u5b9a\u4f4d\u2014\u4fee\u597d"\u7684\u8fc7\u7a0b\u8bb0\u4e0b\u6765\u3002\u5982\u679c\u8fd9\u7bc7\u5bf9\u4f60\u6709\u7528，\u6b22\u8fce\u5173\u6ce8，\u540e\u9762\u4f1a\u6301\u7eed\u66f4\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

    \u79d2\u6740\u4f18\u5316\u4e09\u8fde：Lua \u963b\u585e\u961f\u5217 Redis Stream，\u54cd\u5e94\u4ece 3.4 \u79d2\u5230\u6beb\u79d2\u7ea7\u8fd9\u662f\u300a\u9ed1\u9a6c\u70b9\u8bc4\u9879\u76ee\u590d\u76d8\u300b\u7b2c 4 \u7bc7\u3002
    \n\u4e0a\u4e00\u7bc7\u89e3\u51b3\\”\u5356\u8d85\\”，\u8fd9\u4e00\u7bc7\u89e3\u51b3\\”\u592a\u6162\\”\u3002\u6162\u5230\u4ec0\u4e48\u7a0b\u5ea6？200 \u5e76\u53d1\u62a2 100 \u5e93\u5b58，\u8017\u65f6 3.4 \u79d2\u3002
    \n\u4f18\u5316\u540e：\u8d44\u683c\u5224\u65ad\u5728 Redis \u91cc\u4e00\u6b21\u539f\u5b50\u5b8c\u6210，\u843d\u5e93\u4ea4\u7ed9\u540e\u53f0\u7ebf\u7a0b\u3002\u7528\u6237\u53ea\u7b49\\”\u80fd\u4e0d\u80fd\u62a2\u5230\\”，\u4e0d\u7b49\\”\u6570\u636e\u5e93\u5199\u5b8c\u6ca1\u6709\\”\u3002\u4e00\u3001\u5148\u7b97\u6e05\u695a\u6162\u5728\u54ea
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