第 13 章： 客户端

三个连接到服务器的客户端。

digraph { label = "\n 13-1 客户端与服务器"; rankdir = LR; node [shape = circle, width = 1.2]; c1 [label = "客户端 1"]; c2 [label = "客户端 2"]; c3 [label = "客户端 3"]; node [shape = box, height = 4.0, width = 1.5]; server [label = "服\n务\n器"]; // edge [dir = none, minlen = 2]; c1 -> server; c2 -> server; c3 -> server; }

这三个客户端在服务器状态 clients 属性中的样子。

digraph { label = "\n 13-2 clients 链表"; rankdir = LR; // node [shape = record]; redisServer [label = " redisServer | ... | <clients> clients | ... ", width = 2]; c1 [label = " redisClient\n（客户端 1） "]; c2 [label = " redisClient\n（客户端 2） "]; c3 [label = " redisClient\n（客户端 3） "]; // redisServer:clients -> c1; c1 -> c2; c2 -> c3; }

Redis 客户端的输入缓冲区示例。

digraph { label = "\n 图 13-4 querybuf 属性示例"; rankdir = LR; // node [shape = record]; client [label = " redisClient | ... | <querybuf> querybuf | ... ", width = 2]; sdshdr [label = " <head> sdshdr | free \n 0 | len \n 33 | <buf> buf "]; buf [label = " { '*' | '3' | '\\r' | '\\n' | ... | 'v' | 'a' | 'l' | 'u' | 'e' | '\\r' | '\\n' | '\\0' } "]; // client:querybuf -> sdshdr:head; sdshdr:buf -> buf; }

Redis 客户端的 argv 属性和 argc 属性示例。

digraph { label = "\n 图 13-5 argv 属性和 argc 属性示例"; rankdir = LR; node [shape = record]; redisClient [label = " redisClient | ... | <argv> argv | argc \n 3 | ... ", width = 2]; argv [label = " { { <head> argv[0] | StringObject \n \"SET\" } | { argv[1] | StringObject \n \"key\" } | { argv[1] | StringObject \n \"value\" } } "]; redisClient:argv -> argv:head; }

Redis 客户端的固定大小输出缓冲区示例。

digraph { label = "\n 图 13-8 固定大小缓冲区示例"; rankdir = LR; node [shape = record]; redisClient [label = " redisClient | ... | <buf> buf | bufpos \n 5 | ... "]; buf [label = " { '+' | 'O' | 'K' | '\\r' | '\\n' | '\\0' | ... } "]; redisClient:buf -> buf; }

Redis 客户端的可变大小输出缓冲区示例。

digraph { label = "\n 图 13-9 可变大小缓冲区示例"; rankdir = LR; node [shape = record]; redisClient [label = " redisClient | ... | <reply> reply | ... ", width = 2]; node [label = " <head> StringObject \n ... "]; redisClient:reply -> s1:head -> s2:head -> s3:head; }