{"id":3624,"date":"2019-07-08T15:54:58","date_gmt":"2019-07-08T07:54:58","guid":{"rendered":"https:\/\/damogame.cn\/wordpress\/?p=3624"},"modified":"2019-07-08T15:54:58","modified_gmt":"2019-07-08T07:54:58","slug":"redis%e6%ba%90%e7%a0%81%e5%88%86%e6%9e%90%e4%b9%8b%e6%9c%89%e5%ba%8f%e9%9b%86sortedset","status":"publish","type":"post","link":"https:\/\/i007.cc\/wordpress\/archives\/3624","title":{"rendered":"redis\u6e90\u7801\u5206\u6790\u4e4b\u6709\u5e8f\u96c6SortedSet"},"content":{"rendered":"
\n
\u539f\u6587\u5730\u5740<\/a><\/div>\n
\n
<\/div>\n
2017.11.19 23:13*<\/span>\u00a0\u5b57\u6570 945<\/span>\u00a0\u9605\u8bfb 2647<\/span>\u8bc4\u8bba 0<\/span>\u559c\u6b22 1<\/span><\/div>\n<\/div>\n<\/div>\n
\n
\n

\u6709\u5e8f\u96c6SortedSet\u7b97\u662fredis\u4e2d\u4e00\u4e2a\u5f88\u6709\u7279\u8272\u7684\u6570\u636e\u7ed3\u6784\uff0c\u901a\u8fc7\u8fd9\u7bc7\u6587\u7ae0\u6765\u603b\u7ed3\u4e00\u4e0b\u8fd9\u5757\u77e5\u8bc6\u70b9\u3002<\/p>\n

\u4e00\u3001\u6709\u5e8f\u96c6SortedSet\u547d\u4ee4\u7b80\u4ecb<\/h3>\n

redis\u4e2d\u7684\u6709\u5e8f\u96c6\uff0c\u5141\u8bb8\u7528\u6237\u4f7f\u7528\u6307\u5b9a\u503c\u5bf9\u653e\u8fdb\u53bb\u7684\u5143\u7d20\u8fdb\u884c\u6392\u5e8f\uff0c\u5e76\u4e14\u57fa\u4e8e\u8be5\u5df2\u6392\u5e8f\u7684\u96c6\u5408\u63d0\u4f9b\u4e86\u4e00\u7cfb\u5217\u4e30\u5bcc\u7684\u64cd\u4f5c\u96c6\u5408\u7684API\u3002
\n\u4e3e\u4f8b\u5982\u4e0b\uff1a<\/p>\n

\/\/\u6dfb\u52a0\u5143\u7d20\uff0ctable1\u4e3a\u6709\u5e8f\u96c6\u7684\u540d\u5b57\uff0c100\u4e3a\u7528\u4e8e\u6392\u5e8f\u5b57\u6bb5\uff08redis\u628a\u5b83\u53eb\u505ascore\uff09\uff0ca\u4e3a\u6211\u4eec\u8981\u5b58\u50a8\u7684\u5143\u7d20<\/span>\r\n127.0<\/span>.0<\/span>.1<\/span>:6379<\/span>> zadd table1 100<\/span> a\r\n(integer) 1<\/span>\r\n127.0<\/span>.0<\/span>.1<\/span>:6379<\/span>> zadd table1 200<\/span> b\r\n(integer) 1<\/span>\r\n127.0<\/span>.0<\/span>.1<\/span>:6379<\/span>> zadd table1 300<\/span> c\r\n(integer) 1<\/span>\r\n\/\/\u6309\u7167\u5143\u7d20\u7d22\u5f15\u8fd4\u56de\u6709\u5e8f\u96c6\u4e2d\u7684\u5143\u7d20\uff0c\u7d22\u5f15\u4ece0\u5f00\u59cb<\/span>\r\n127.0<\/span>.0<\/span>.1<\/span>:6379<\/span>> zrange table1 0<\/span> 1<\/span>\r\n1<\/span>) \"a\"<\/span>\r\n2<\/span>) \"b\"<\/span>\r\n\/\/\u6309\u7167\u5143\u7d20\u6392\u5e8f\u8303\u56f4\u8fd4\u56de\u6709\u5e8f\u96c6\u4e2d\u7684\u5143\u7d20\uff0c\u8fd9\u91cc\u7528\u4e8e\u6392\u5e8f\u7684\u5b57\u6bb5\u5728redis\u4e2d\u53eb\u505ascore<\/span>\r\n127.0<\/span>.0<\/span>.1<\/span>:6379<\/span>> zrangebyscore table1 150<\/span> 400<\/span>\r\n1<\/span>) \"b\"<\/span>\r\n2<\/span>) \"c\"<\/span>\r\n\/\/\u5220\u9664\u5143\u7d20<\/span>\r\n127.0<\/span>.0<\/span>.1<\/span>:6379<\/span>> zrem table1 b<\/span>\r\n(integer)<\/span> 1\r\n<\/span><\/code><\/pre>\n
\u5728\u6709\u5e8f\u96c6\u4e2d\uff0c\u7528\u4e8e\u6392\u5e8f\u7684\u503c\u53eb\u505ascore\uff0c\u5b9e\u9645\u5b58\u50a8\u7684\u503c\u53eb\u505amember\u3002<\/strong><\/p>\n
\u7531\u4e8e\u6709\u5e8f\u96c6\u4e2d\u63d0\u4f9b\u7684API\u8f83\u591a\uff0c\u8fd9\u91cc\u53ea\u4e3e\u4e86\u51e0\u4e2a\u5e38\u89c1\u7684\uff0c\u5177\u4f53\u53ef\u4ee5\u53c2\u8003redis\u6587\u6863\u3002<\/p>\n
\u5173\u4e8e\u6709\u5e8f\u96c6\uff0c\u6211\u4eec\u6709\u4e00\u4e2a\u5341\u5206\u5e38\u89c1\u7684\u4f7f\u7528\u573a\u666f\u5c31\u662f\u7528\u6237\u8bc4\u8bba\u3002\u5728APP\u6216\u8005\u7f51\u7ad9\u4e0a\u53d1\u5e03\u4e00\u6761\u6d88\u606f\uff0c\u4e0b\u9762\u4f1a\u6709\u5f88\u591a\u8bc4\u8bba\uff0c\u901a\u5e38\u5c55\u793a\u662f\u6309\u7167\u53d1\u5e03\u65f6\u95f4\u5012\u5e8f\u6392\u5217\uff0c\u8fd9\u4e2a\u9700\u6c42\u5c31\u53ef\u4ee5\u4f7f\u7528\u6709\u5e8f\u96c6\uff0c\u4ee5\u53d1\u5e03\u8bc4\u8bba\u7684\u65f6\u95f4\u6233\u4f5c\u4e3ascore\uff0c\u7136\u540e\u6309\u7167\u5c55\u793a\u8bc4\u8bba\u7684\u6570\u91cf\u5012\u5e8f\u67e5\u627e\u6709\u5e8f\u96c6\u3002<\/p>\n
\u4e8c\u3001\u6709\u5e8f\u96c6SortedSet\u547d\u4ee4\u6e90\u7801\u5206\u6790<\/h3>\n
\u8001\u89c4\u77e9\uff0c\u6211\u4eec\u8fd8\u662f\u4eceserver.c\u6587\u4ef6\u4e2d\u7684\u547d\u4ee4\u8868\u4e2d\u627e\u5230\u76f8\u5173\u547d\u4ee4\u7684\u5904\u7406\u51fd\u6570\uff0c\u7136\u540e\u4e00\u4e00\u5206\u6790\u3002
\n\u4f9d\u65e7\u4ece\u6dfb\u52a0\u5143\u7d20\u5f00\u59cb\uff0czaddCommand\u51fd\u6570\uff1a<\/p>\n
void<\/span> zaddCommand<\/span>(client *c)<\/span> <\/span>{\r\n    zaddGenericCommand(c,ZADD_NONE);\r\n}\r\n<\/code><\/pre>\n
\u8fd9\u91cc\u53ef\u4ee5\u770b\u5230\u6d41\u7a0b\u8f6c\u5411\u4e86zaddGenericCommand\uff0c\u5e76\u4e14\u4f20\u5165\u4e86\u4e00\u4e2a\u6a21\u5f0f\u6807\u8bb0\u3002
\n\u5173\u4e8eSortedSet\u7684\u64cd\u4f5c\u6a21\u5f0f\u8fd9\u91cc\u7b80\u5355\u8bf4\u660e\u4e00\u4e0b\uff0c\u5148\u6765\u770b\u4e00\u6761\u5b8c\u6574\u7684zadd\u547d\u4ee4\uff1a<\/p>\n
zadd<\/span> key<\/span> [NX|XX]<\/span> [CH]<\/span> [INCR]<\/span> score<\/span> member<\/span> [score member ...]<\/span>\r\n<\/code><\/pre>\n
\u5176\u4e2d\u7684\u53ef\u9009\u9879\u6211\u4eec\u4f9d\u6b21\u770b\u4e0b\uff1a<\/p>\n
    \n
  1. NX\u8868\u793a\u5982\u679c\u5143\u7d20\u5b58\u5728\uff0c\u5219\u4e0d\u6267\u884c\u66ff\u6362\u64cd\u4f5c\u76f4\u63a5\u8fd4\u56de\u3002<\/li>\n
  2. XX\u8868\u793a\u53ea\u64cd\u4f5c\u5df2\u5b58\u5728\u7684\u5143\u7d20\u3002<\/li>\n
  3. CH\u8868\u793a\u8fd4\u56de\u4fee\u6539\uff08\u5305\u62ec\u6dfb\u52a0\uff0c\u66f4\u65b0\uff09\u5143\u7d20\u7684\u6570\u91cf\uff0c\u53ea\u80fd\u88abZADD\u547d\u4ee4\u4f7f\u7528\u3002<\/li>\n
  4. INCR\u8868\u793a\u5728\u539f\u6765\u7684score\u57fa\u7840\u4e0a\u52a0\u4e0a\u65b0\u7684score\uff0c\u800c\u4e0d\u662f\u66ff\u6362\u3002<\/li>\n<\/ol>\n
    \u4e0a\u9762\u4ee3\u7801\u7247\u6bb5\u4e2d\u7684ZADD_NONE\u8868\u793a\u666e\u901a\u64cd\u4f5c\u3002<\/p>\n
    \u63a5\u4e0b\u6765\u770b\u4e0bzaddGenericCommand\u51fd\u6570\u7684\u6e90\u7801\uff0c\u5f88\u957f\uff0c\u8010\u5fc3\u4e00\u70b9\u70b9\u770b\uff1a<\/p>\n
    void<\/span> zaddGenericCommand<\/span>(client *c, int<\/span> flags)<\/span> <\/span>{\r\n    \/\/\u4e00\u6761\u9519\u8bef\u63d0\u793a\u4fe1\u606f<\/span>\r\n    static<\/span> char<\/span> *nanerr = \"resulting score is not a number (NaN)\"<\/span>;\r\n    \/\/\u6709\u5e8f\u96c6\u540d\u5b57<\/span>\r\n    robj *key = c->argv[1<\/span>];\r\n    robj *zobj;\r\n    sds ele;\r\n    double<\/span> score = 0<\/span>, *scores = NULL<\/span>;\r\n    int<\/span> j, elements;\r\n    int<\/span> scoreidx = 0<\/span>;\r\n    \/\/\u8bb0\u5f55\u5143\u7d20\u64cd\u4f5c\u4e2a\u6570<\/span>\r\n    int<\/span> added = 0<\/span>;     \r\n    int<\/span> updated = 0<\/span>;    \r\n    int<\/span> processed = 0<\/span>;  \r\n    \r\n    \/\/\u67e5\u627escore\u7684\u4f4d\u7f6e\uff0c\u9ed8\u8ba4score\u5728\u4f4d\u7f6e2\u4e0a\uff0c\u4f46\u7531\u4e8e\u6709\u5404\u79cd\u6a21\u5f0f\uff0c\u6240\u4ee5\u9700\u8981\u5224\u65ad<\/span>\r\n    scoreidx = 2<\/span>;\r\n    while<\/span>(scoreidx < c->argc) {\r\n        char<\/span> *opt = c->argv[scoreidx]->ptr;\r\n        \/\/\u5224\u65ad\u547d\u4ee4\u4e2d\u662f\u5426\u8bbe\u7f6e\u4e86\u5404\u79cd\u6a21\u5f0f<\/span>\r\n        if<\/span> (!strcasecmp(opt,\"nx\"<\/span>)) flags |= ZADD_NX;\r\n        else<\/span> if<\/span> (!strcasecmp(opt,\"xx\"<\/span>)) flags |= ZADD_XX;\r\n        else<\/span> if<\/span> (!strcasecmp(opt,\"ch\"<\/span>)) flags |= ZADD_CH;\r\n        else<\/span> if<\/span> (!strcasecmp(opt,\"incr\"<\/span>)) flags |= ZADD_INCR;\r\n        else<\/span> break<\/span>;\r\n        scoreidx++;\r\n    }\r\n\r\n    \/\/\u8bbe\u7f6e\u6a21\u5f0f<\/span>\r\n    int<\/span> incr = (flags & ZADD_INCR) != 0<\/span>;\r\n    int<\/span> nx = (flags & ZADD_NX) != 0<\/span>;\r\n    int<\/span> xx = (flags & ZADD_XX) != 0<\/span>;\r\n    int<\/span> ch = (flags & ZADD_CH) != 0<\/span>;\r\n\r\n    \/\/\u901a\u8fc7\u4e0a\u9762\u7684\u89e3\u6790\uff0cscoreidx\u4e3a\u771f\u5b9e\u7684\u521d\u59cbscore\u7684\u7d22\u5f15\u4f4d\u7f6e<\/span>\r\n    \/\/\u8fd9\u91cc\u5ba2\u6237\u7aef\u53c2\u6570\u6570\u91cf\u51cf\u53bbscoreidx\u5c31\u662f\u5269\u4f59\u6240\u6709\u5143\u7d20\u7684\u6570\u91cf<\/span>\r\n    elements = c->argc - scoreidx;\r\n    \/\/\u7531\u4e8e\u6709\u5e8f\u96c6\u4e2dscore\uff0cmember\u6210\u5bf9\u51fa\u73b0\uff0c\u6240\u4ee5\u52a0\u4e00\u5c42\u5224\u65ad<\/span>\r\n    if<\/span> (elements % 2<\/span> || !elements) {\r\n        addReply(c,shared.syntaxerr);\r\n        return<\/span>;\r\n    }\r\n    \/\/\u8fd9\u91cc\u8ba1\u7b97score\uff0cmember\u6709\u591a\u5c11\u5bf9<\/span>\r\n    elements \/= 2<\/span>; \r\n\r\n    \/\/\u53c2\u6570\u5408\u6cd5\u6027\u6821\u9a8c<\/span>\r\n    if<\/span> (nx && xx) {\r\n        addReplyError(c,\r\n            \"XX and NX options at the same time are not compatible\"<\/span>);\r\n        return<\/span>;\r\n    }\r\n    \/\/\u53c2\u6570\u5408\u6cd5\u6027\u6821\u9a8c<\/span>\r\n    if<\/span> (incr && elements > 1<\/span>) {\r\n        addReplyError(c,\r\n            \"INCR option supports a single increment-element pair\"<\/span>);\r\n        return<\/span>;\r\n    }\r\n\r\n    \/\/\u8fd9\u91cc\u5f00\u59cb\u89e3\u6790score\uff0c\u5148\u521d\u59cb\u5316scores\u6570\u7ec4<\/span>\r\n    scores = zmalloc(sizeof<\/span>(double<\/span>)*elements);\r\n    for<\/span> (j = 0<\/span>; j < elements; j++) {\r\n        \/\/\u586b\u5145\u6570\u7ec4\uff0c\u8fd9\u91cc\u6ce8\u610f\u5143\u7d20\u662f\u6210\u5bf9\u51fa\u73b0\uff0c\u6240\u4ee5\u5404\u4e2ascore\u4e4b\u95f4\u8981\u9694\u4e00\u4e2amember<\/span>\r\n        if<\/span> (getDoubleFromObjectOrReply(c,c->argv[scoreidx+j*2<\/span>],&scores[j],NULL<\/span>)\r\n            != C_OK) goto<\/span> cleanup;\r\n    }\r\n\r\n    \/\/\u8fd9\u91cc\u9996\u5148\u5728client\u5bf9\u5e94\u7684db\u4e2d\u67e5\u627e\u8be5key\uff0c\u5373\u6709\u5e8f\u96c6<\/span>\r\n    zobj = lookupKeyWrite(c->db,key);\r\n    if<\/span> (zobj == NULL<\/span>) {\r\n        \/\/\u6ca1\u6709\u6307\u5b9a\u6709\u5e8f\u96c6\u4e14\u6a21\u5f0f\u4e3aXX\uff08\u53ea\u64cd\u4f5c\u5df2\u5b58\u5728\u7684\u5143\u7d20\uff09\uff0c\u76f4\u63a5\u8fd4\u56de<\/span>\r\n        if<\/span> (xx) goto<\/span> reply_to_client; \r\n        \/\/\u6839\u636e\u5143\u7d20\u6570\u91cf\u9009\u62e9\u4e0d\u540c\u7684\u5b58\u50a8\u7ed3\u6784\u521d\u59cb\u5316\u6709\u5e8f\u96c6<\/span>\r\n        if<\/span> (server.zset_max_ziplist_entries == 0<\/span> ||\r\n            server.zset_max_ziplist_value < sdslen(c->argv[scoreidx+1<\/span>]->ptr))\r\n        {\r\n            \/\/\u54c8\u5e0c\u8868 + \u8df3\u8868\u7684\u7ec4\u5408\u6a21\u5f0f<\/span>\r\n            zobj = createZsetObject();\r\n        } else<\/span> {\r\n            \/\/ziplist\uff08\u538b\u7f29\u94fe\u8868\uff09\u6a21\u5f0f<\/span>\r\n            zobj = createZsetZiplistObject();\r\n        }\r\n        \/\/\u52a0\u5165db\u4e2d<\/span>\r\n        dbAdd(c->db,key,zobj);\r\n    } else<\/span> {\r\n        \/\/\u5982\u679cZADD\u64cd\u4f5c\u7684\u96c6\u5408\u7c7b\u578b\u4e0d\u5bf9\uff0c\u5219\u8fd4\u56de<\/span>\r\n        if<\/span> (zobj->type != OBJ_ZSET) {\r\n            addReply(c,shared.wrongtypeerr);\r\n            goto<\/span> cleanup;\r\n        }\r\n    }\r\n    \/\/\u8fd9\u91cc\u5f00\u59cb\u5f80\u6709\u5e8f\u96c6\u4e2d\u6dfb\u52a0\u5143\u7d20<\/span>\r\n    for<\/span> (j = 0<\/span>; j < elements; j++) {\r\n        double<\/span> newscore;\r\n        \/\/\u53d6\u51faclient\u4f20\u8fc7\u6765\u7684score<\/span>\r\n        score = scores[j];\r\n        int<\/span> retflags = flags;\r\n        \/\/\u53d6\u51fa\u4e0e\u4e4b\u5bf9\u5e94\u7684member<\/span>\r\n        ele = c->argv[scoreidx+1<\/span>+j*2<\/span>]->ptr;\r\n        \/\/\u5411\u6709\u5e8f\u96c6\u4e2d\u6dfb\u52a0\u5143\u7d20\uff0c\u53c2\u6570\u4f9d\u6b21\u662f\u6709\u5e8f\u96c6\uff0c\u8981\u6dfb\u52a0\u7684\u5143\u7d20\u7684score\uff0c\u8981\u6dfb\u52a0\u7684\u5143\u7d20\uff0c\u64cd\u4f5c\u6a21\u5f0f\uff0c\u65b0\u7684score<\/span>\r\n        int<\/span> retval = zsetAdd(zobj, score, ele, &retflags, &newscore);\r\n        \/\/\u6dfb\u52a0\u5931\u8d25\u5219\u8fd4\u56de<\/span>\r\n        if<\/span> (retval == 0<\/span>) {\r\n            addReplyError(c,nanerr);\r\n            goto<\/span> cleanup;\r\n        }\r\n        \/\/\u8bb0\u5f55\u64cd\u4f5c<\/span>\r\n        if<\/span> (retflags & ZADD_ADDED) added++;\r\n        if<\/span> (retflags & ZADD_UPDATED) updated++;\r\n        if<\/span> (!(retflags & ZADD_NOP)) processed++;\r\n        \/\/\u8bbe\u7f6e\u65b0score\u503c<\/span>\r\n        score = newscore;\r\n    }\r\n    \/\/\u64cd\u4f5c\u8bb0\u5f55<\/span>\r\n    server.dirty += (added+updated);\r\n\r\n\/\/\u8fd4\u56de\u903b\u8f91<\/span>\r\nreply_to_client:\r\n    if<\/span> (incr) {\r\n        if<\/span> (processed)\r\n            addReplyDouble(c,score);\r\n        else<\/span>\r\n            addReply(c,shared.nullbulk);\r\n    } else<\/span> {\r\n        addReplyLongLong(c,ch ? added+updated : added);\r\n    }\r\n\/\/\u6e05\u7406\u903b\u8f91<\/span>\r\ncleanup:\r\n    zfree(scores);\r\n    if<\/span> (added || updated) {\r\n        signalModifiedKey(c->db,key);\r\n        notifyKeyspaceEvent(NOTIFY_ZSET,\r\n            incr ? \"zincr\"<\/span> : \"zadd\"<\/span>, key, c->db->id);\r\n    }\r\n}\r\n<\/code><\/pre>\n
    \u4ee3\u7801\u6709\u70b9\u957f\uff0c\u6765\u5f20\u56fe\u770b\u4e00\u4e0b\u5b58\u50a8\u7ed3\u6784\uff1a<\/p>\n
    \n
    \n
    <\/div>\n
    <\/div>\n<\/div>\n
    \u6709\u5e8f\u96c6\u5b58\u50a8\u7ed3\u6784<\/div>\n<\/div>\n
    \u6ce8\uff1a\u6bcf\u4e2aentry\u90fd\u662f\u7531score+member\u7ec4\u6210<\/strong>\u6709\u4e86\u4e0a\u9762\u7684\u7ed3\u6784\u56fe\u4ee5\u540e\uff0c\u53ef\u4ee5\u60f3\u5230\u5220\u9664\u64cd\u4f5c\u5e94\u8be5\u5c31\u662f\u6839\u636e\u4e0d\u540c\u7684\u5b58\u50a8\u7ed3\u6784\u8fdb\u884c\uff0c\u5982\u679c\u662fziplist\u5c31\u6267\u884c\u94fe\u8868\u5220\u9664\uff0c\u5982\u679c\u662f\u54c8\u5e0c\u8868+\u8df3\u8868\u7ed3\u6784\uff0c\u90a3\u5c31\u8981\u628a\u4e24\u4e2a\u96c6\u5408\u90fd\u8fdb\u884c\u5220\u9664\u3002\u771f\u5b9e\u903b\u8f91\u662f\u4ec0\u4e48\u5462\uff1f
    \n\u6211\u4eec\u6765\u770b\u4e0b\u5220\u9664\u51fd\u6570zremCommand\u7684\u6e90\u7801\uff0c\u76f8\u5bf9\u77ed\u4e00\u70b9\uff1a<\/p>\n
    void zremCommand(client *c) {\r\n    \/\/\u83b7\u53d6\u6709\u5e8f\u96c6\u540d<\/span>\r\n    robj *key = c->argv[1<\/span>];\r\n    robj *zobj;\r\n    int deleted = 0<\/span>, keyremoved = 0<\/span>, j;\r\n    \/\/\u505a\u6821\u9a8c<\/span>\r\n    if<\/span> ((zobj = lookupKeyWriteOrReply(c,key,shared.czero)) == NULL<\/span> ||\r\n        checkType(c,zobj,OBJ_ZSET)) return<\/span>;\r\n\r\n    for<\/span> (j = 2<\/span>; j < c->argc; j++) {\r\n        \/\/\u4e00\u6b21\u5220\u9664\u6307\u5b9a\u5143\u7d20<\/span>\r\n        if<\/span> (zsetDel(zobj,c->argv[j]->ptr)) deleted++;\r\n        \/\/\u5982\u679c\u6709\u5e8f\u96c6\u4e2d\u5168\u90e8\u5143\u7d20\u90fd\u88ab\u5220\u9664\uff0c\u5219\u56de\u6536\u6709\u5e8f\u8868<\/span>\r\n        if<\/span> (zsetLength(zobj) == 0<\/span>) {\r\n            dbDelete(c->db,key);\r\n            keyremoved = 1<\/span>;\r\n            break<\/span>;\r\n        }\r\n    }\r\n    \/\/\u540c\u6b65\u64cd\u4f5c<\/span>\r\n    if<\/span> (deleted) {\r\n        notifyKeyspaceEvent(NOTIFY_ZSET,\"zrem\"<\/span>,key,c->db->id);\r\n        if<\/span> (keyremoved)\r\n            notifyKeyspaceEvent(NOTIFY_GENERIC,\"del\"<\/span>,key,c->db->id);\r\n        signalModifiedKey(c->db,key);\r\n        server.dirty += deleted;\r\n    }\r\n    \/\/\u8fd4\u56de<\/span>\r\n    addReplyLongLong(c,deleted);\r\n}\r\n<\/code><\/pre>\n
    \u770b\u4e0b\u5177\u4f53\u7684\u5220\u9664\u64cd\u4f5c\u6e90\u7801\uff1a<\/p>\n
    \/\/\u53c2\u6570zobj\u4e3a\u6709\u5e8f\u96c6\uff0cele\u4e3a\u8981\u5220\u9664\u7684\u5143\u7d20<\/span>\r\nint zsetDel(robj *zobj, sds ele) {\r\n    \/\/\u4e0e\u6dfb\u52a0\u5143\u7d20\u76f8\u540c\uff0c\u6839\u636e\u4e0d\u540c\u7684\u5b58\u50a8\u7ed3\u6784\u6267\u884c\u4e0d\u540c\u7684\u5220\u9664\u903b\u8f91<\/span>\r\n    if<\/span> (zobj->encoding == OBJ_ENCODING_ZIPLIST) {\r\n        unsigned char *eptr;\r\n        \/\/ziplist\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u94fe\u8868\u5220\u9664\u8282\u70b9\u64cd\u4f5c<\/span>\r\n        if<\/span> ((eptr = zzlFind(zobj->ptr,ele,NULL<\/span>)) != NULL<\/span>) {\r\n            zobj->ptr = zzlDelete(zobj->ptr,eptr);\r\n            return<\/span> 1<\/span>;\r\n        }\r\n    } else<\/span> if<\/span> (zobj->encoding == OBJ_ENCODING_SKIPLIST) {\r\n        zset *zs = zobj->ptr;\r\n        dictEntry *de;\r\n        double score;\r\n\r\n        de = dictUnlink(zs->dict,ele);\r\n        if<\/span> (de != NULL<\/span>) {\r\n            \/\/\u67e5\u8be2\u8be5\u5143\u7d20\u7684score<\/span>\r\n            score = *(double*)dictGetVal(de);\r\n            \/\/\u4ece\u54c8\u5e0c\u8868\u4e2d\u5220\u9664\u5143\u7d20<\/span>\r\n            dictFreeUnlinkedEntry(zs->dict,de);\r\n\r\n            \/\/\u4ece\u8df3\u8868\u4e2d\u5220\u9664\u5143\u7d20<\/span>\r\n            int retval = zslDelete(zs->zsl,score,ele,NULL<\/span>);\r\n            serverAssert(retval);\r\n            \/\/\u5982\u679c\u6709\u9700\u8981\u5219\u5bf9\u54c8\u5e0c\u8868\u8fdb\u884cresize\u64cd\u4f5c<\/span>\r\n            if<\/span> (htNeedsResize(zs->dict)) dictResize(zs->dict);\r\n            return<\/span> 1<\/span>;\r\n        }\r\n    } else<\/span> {\r\n        serverPanic(\"Unknown sorted set encoding\"<\/span>);\r\n    }\r\n    \/\/\u6ca1\u6709\u627e\u5230\u6307\u5b9a\u5143\u7d20\u8fd4\u56de0<\/span>\r\n    return<\/span> 0<\/span>;\r\n}\r\n<\/code><\/pre>\n
    \u6700\u540e\u770b\u4e00\u4e2a\u67e5\u8be2\u51fd\u6570zrangeCommand\u6e90\u7801\uff0c\u4e5f\u662f\u5f88\u957f\uff0c\u6c57~~~\uff0c\u4e0d\u8fc7\u653e\u5fc3\uff0c\u6709\u4e86\u4e0a\u9762\u7684\u57fa\u7840\uff0c\u5927\u81f4\u4e5f\u80fd\u731c\u5230\u67e5\u8be2\u903b\u8f91\u5e94\u8be5\u662f\u4ec0\u4e48\u6837\u5b50\u7684\uff1a<\/p>\n
    void<\/span> zrangeCommand<\/span>(client *c)<\/span> <\/span>{\r\n    \/\/\u7b2c\u4e8c\u4e2a\u53c2\u6570\uff0c0\u8868\u793a\u987a\u5e8f\uff0c1\u8868\u793a\u5012\u5e8f<\/span>\r\n    zrangeGenericCommand(c,0<\/span>);\r\n}\r\n\r\nvoid<\/span> zrangeGenericCommand<\/span>(client *c, int<\/span> reverse)<\/span> <\/span>{\r\n    \/\/\u6709\u5e8f\u96c6\u540d<\/span>\r\n    robj *key = c->argv[1<\/span>];\r\n    robj *zobj;\r\n    int<\/span> withscores = 0<\/span>;\r\n    long<\/span> start;\r\n    long<\/span> end;\r\n    int<\/span> llen;\r\n    int<\/span> rangelen;\r\n    \/\/\u53c2\u6570\u6821\u9a8c<\/span>\r\n    if<\/span> ((getLongFromObjectOrReply(c, c->argv[2<\/span>], &start, NULL<\/span>) != C_OK) ||\r\n        (getLongFromObjectOrReply(c, c->argv[3<\/span>], &end, NULL<\/span>) != C_OK)) return<\/span>;\r\n\r\n    \/\/\u6839\u636e\u53c2\u6570\u9644\u52a0\u4fe1\u606f\u5224\u65ad\u662f\u5426\u9700\u8981\u8fd4\u56descore<\/span>\r\n    if<\/span> (c->argc == 5<\/span> && !strcasecmp(c->argv[4<\/span>]->ptr,\"withscores\"<\/span>)) {\r\n        withscores = 1<\/span>;\r\n    } else<\/span> if<\/span> (c->argc >= 5<\/span>) {\r\n        addReply(c,shared.syntaxerr);\r\n        return<\/span>;\r\n    }\r\n    \/\/\u6709\u5e8f\u96c6\u6821\u9a8c<\/span>\r\n    if<\/span> ((zobj = lookupKeyReadOrReply(c,key,shared.emptymultibulk)) == NULL<\/span>\r\n         || checkType(c,zobj,OBJ_ZSET)) return<\/span>;\r\n\r\n    \/\/\u7d22\u5f15\u503c\u91cd\u7f6e<\/span>\r\n    llen = zsetLength(zobj);\r\n    if<\/span> (start < 0<\/span>) start = llen+start;\r\n    if<\/span> (end < 0<\/span>) end = llen+end;\r\n    if<\/span> (start < 0<\/span>) start = 0<\/span>;\r\n     \/\/\u8fd4\u56de\u7a7a\u96c6<\/span>\r\n    if<\/span> (start > end || start >= llen) {\r\n        addReply(c,shared.emptymultibulk);\r\n        return<\/span>;\r\n    }\r\n    if<\/span> (end >= llen) end = llen-1<\/span>;\r\n    rangelen = (end-start)+1<\/span>;\r\n\r\n    \/\/\u8fd4\u56de\u7ed9\u5ba2\u6237\u7aef\u7ed3\u679c\u957f\u5ea6<\/span>\r\n    addReplyMultiBulkLen(c, withscores ? (rangelen*2<\/span>) : rangelen);\r\n    \/\/\u540c\u6837\u662f\u6839\u636e\u6709\u5e8f\u96c6\u7684\u4e0d\u540c\u7ed3\u6784\u6267\u884c\u4e0d\u540c\u7684\u67e5\u8be2\u903b\u8f91<\/span>\r\n    if<\/span> (zobj->encoding == OBJ_ENCODING_ZIPLIST) {\r\n        unsigned<\/span> char<\/span> *zl = zobj->ptr;\r\n        unsigned<\/span> char<\/span> *eptr, *sptr;\r\n        unsigned<\/span> char<\/span> *vstr;\r\n        unsigned<\/span> int<\/span> vlen;\r\n        long<\/span> long<\/span> vlong;\r\n        \/\/\u6839\u636e\u6b63\u5e8f\u8fd8\u662f\u5012\u5e8f\u8ba1\u7b97\u8d77\u59cb\u7d22\u5f15<\/span>\r\n        if<\/span> (reverse)\r\n            eptr = ziplistIndex(zl,-2<\/span>-(2<\/span>*start));\r\n        else<\/span>\r\n            eptr = ziplistIndex(zl,2<\/span>*start);\r\n\r\n        serverAssertWithInfo(c,zobj,eptr != NULL<\/span>);\r\n        sptr = ziplistNext(zl,eptr);\r\n\r\n        while<\/span> (rangelen--) {\r\n            serverAssertWithInfo(c,zobj,eptr != NULL<\/span> && sptr != NULL<\/span>);\r\n            \/\/\u6ce8\u610f\u5d4c\u5957\u7684ziplistGet\u65b9\u6cd5\u5c31\u662f\u628aeptr\u7d22\u5f15\u7684\u503c\u8bfb\u51fa\u6765\u4fdd\u5b58\u5728\u540e\u9762\u4e09\u4e2a\u53c2\u6570\u4e2d<\/span>\r\n            serverAssertWithInfo(c,zobj,ziplistGet(eptr,&vstr,&vlen,&vlong));\r\n            \/\/\u8fd4\u56devalue<\/span>\r\n            if<\/span> (vstr == NULL<\/span>)\r\n                addReplyBulkLongLong(c,vlong);\r\n            else<\/span>\r\n                addReplyBulkCBuffer(c,vstr,vlen);\r\n            \/\/\u5982\u679c\u9700\u8981\u5219\u8fd4\u56descore<\/span>\r\n            if<\/span> (withscores)\r\n                addReplyDouble(c,zzlGetScore(sptr));\r\n            \/\/\u5012\u5e8f\u4ece\u540e\u5f80\u524d\uff0c\u6b63\u5e8f\u4ece\u524d\u5f80\u540e<\/span>\r\n            if<\/span> (reverse)\r\n                zzlPrev(zl,&eptr,&sptr);\r\n            else<\/span>\r\n                zzlNext(zl,&eptr,&sptr);\r\n        }\r\n\r\n    } else<\/span> if<\/span> (zobj->encoding == OBJ_ENCODING_SKIPLIST) {\r\n        zset *zs = zobj->ptr;\r\n        zskiplist *zsl = zs->zsl;\r\n        zskiplistNode *ln;\r\n        sds ele;\r\n\r\n        \/\/\u627e\u5230\u8d77\u59cb\u8282\u70b9<\/span>\r\n        if<\/span> (reverse) {\r\n            ln = zsl->tail;\r\n            if<\/span> (start > 0<\/span>)\r\n                ln = zslGetElementByRank(zsl,llen-start);\r\n        } else<\/span> {\r\n            ln = zsl->header->level[0<\/span>].forward;\r\n            if<\/span> (start > 0<\/span>)\r\n                ln = zslGetElementByRank(zsl,start+1<\/span>);\r\n        }\r\n         \/\/\u904d\u5386\u5e76\u8fd4\u56de\u7ed9\u5ba2\u6237\u7aef<\/span>\r\n        while<\/span>(rangelen--) {\r\n            serverAssertWithInfo(c,zobj,ln != NULL<\/span>);\r\n            ele = ln->ele;\r\n            addReplyBulkCBuffer(c,ele,sdslen(ele));\r\n            if<\/span> (withscores)\r\n                addReplyDouble(c,ln->score);\r\n            ln = reverse ? ln->backward : ln->level[0<\/span>].forward;\r\n        }\r\n    } else<\/span> {\r\n        serverPanic(\"Unknown sorted set encoding\"<\/span>);\r\n    }\r\n}\r\n<\/code><\/pre>\n
    \u4e0a\u9762\u5c31\u662f\u5173\u4e8e\u6709\u5e8f\u96c6SortedSet\u7684\u6dfb\u52a0\uff0c\u5220\u9664\uff0c\u67e5\u627e\u7684\u6e90\u7801\u3002\u53ef\u4ee5\u770b\u51faSortedSet\u4f1a\u6839\u636e\u5b58\u653e\u5143\u7d20\u7684\u6570\u91cf\u9009\u62e9ziplist\u6216\u8005\u54c8\u5e0c\u8868+\u8df3\u8868\u4e24\u79cd\u6570\u636e\u7ed3\u6784\u8fdb\u884c\u5b9e\u73b0\uff0c\u4e4b\u6240\u4ee5\u6e90\u7801\u770b\u4e0a\u53bb\u5f88\u957f\uff0c\u4e3b\u8981\u539f\u56e0\u4e5f\u5c31\u662f\u8981\u6839\u636e\u4e0d\u540c\u7684\u6570\u636e\u7ed3\u6784\u8fdb\u884c\u4e0d\u540c\u7684\u4ee3\u7801\u5b9e\u73b0\u3002\u53ea\u8981\u638c\u63e1\u4e86\u8fd9\u4e2a\u6838\u5fc3\u601d\u8def\uff0c\u518d\u770b\u6e90\u7801\u5c31\u4e0d\u4f1a\u592a\u96be\u3002<\/p>\n
    \u4e09\u3001\u6709\u5e8f\u96c6SortedSet\u547d\u4ee4\u603b\u7ed3<\/h3>\n
    \u6709\u5e8f\u96c6\u7684\u903b\u8f91\u4e0d\u96be\uff0c\u5c31\u662f\u4ee3\u7801\u6709\u70b9\u957f\uff0c\u6d89\u53ca\u5230ziplist\uff0cskiplist\uff0cdict\u4e09\u5957\u6570\u636e\u7ed3\u6784\uff0c\u5176\u4e2d\u9664\u4e86\u5e38\u89c4\u7684dict\u4e4b\u5916\uff0c\u53e6\u5916\u4e24\u4e2a\u6570\u636e\u7ed3\u6784\u5185\u5bb9\u90fd\u4e0d\u5c11\uff0c\u51c6\u5907\u4e13\u95e8\u5199\u6587\u7ae0\u8fdb\u884c\u603b\u7ed3\uff0c\u5c31\u4e0d\u5728\u8fd9\u91cc\u8d58\u8ff0\u4e86\u3002\u672c\u6587\u4e3b\u8981\u76ee\u7684\u662f\u603b\u7ed3\u4e00\u4e0b\u6709\u5e8f\u96c6SortedSet\u7684\u5b9e\u73b0\u539f\u7406\u3002<\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"
    \u539f\u6587\u5730\u5740 2017.11.19 23:1<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"colormag_page_container_layout":"default_layout","colormag_page_sidebar_layout":"default_layout","footnotes":""},"categories":[],"tags":[119],"class_list":["post-3624","post","type-post","status-publish","format-standard","hentry","tag-03-"],"_links":{"self":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts\/3624","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/comments?post=3624"}],"version-history":[{"count":0,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts\/3624\/revisions"}],"wp:attachment":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/media?parent=3624"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/categories?post=3624"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/tags?post=3624"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}