git.m6w6.name Git - awesomized/libmemcached/blob - lib/memcached_get.c

   1 #include "common.h"
   2 #include "memcached_io.h"
   3
   4 /*
   5   What happens if no servers exist?
   6 */
   7 char *memcached_get(memcached_st *ptr, char *key, size_t key_length,
   8                     size_t *value_length,
   9                     uint16_t *flags,
  10                     memcached_return *error)
  11 {
  12   char *value;
  13
  14   /* Request the key */
  15   *error= memcached_mget(ptr, &key, &key_length, 1);
  16
  17   value= memcached_fetch(ptr, NULL, NULL,
  18                          value_length, flags, error);
  19
  20   /* This is for historical reasons */
  21   if (*error == MEMCACHED_END)
  22     *error= MEMCACHED_NOTFOUND;
  23
  24   if (value == NULL)
  25     return NULL;
  26
  27   memcached_finish(ptr);
  28
  29   return value;
  30 }
  31
  32 memcached_return memcached_mget(memcached_st *ptr,
  33                                 char **keys, size_t *key_length,
  34                                 unsigned int number_of_keys)
  35 {
  36   unsigned int x;
  37   memcached_return rc= MEMCACHED_NOTFOUND;
  38   char *get_command= "get ";
  39   uint8_t get_command_length= 4
  40
  41   LIBMEMCACHED_MEMCACHED_MGET_START();
  42   ptr->cursor_server= 0;
  43
  44   if (number_of_keys == 0)
  45     return MEMCACHED_NOTFOUND;
  46
  47   if (ptr->number_of_hosts == 0)
  48     return MEMCACHED_NO_SERVERS;
  49
  50   if (ptr->flags & MEM_SUPPORT_CAS)
  51   {
  52     get_command= "gets ";
  53     get_command_length= 5;
  54   }
  55
  56   memcached_finish(ptr);
  57
  58   /*
  59     If a server fails we warn about errors and start all over with sending keys
  60     to the server.
  61   */
  62   for (x= 0; x < number_of_keys; x++)
  63   {
  64     unsigned int server_key;
  65
  66     server_key= memcached_generate_hash(ptr, keys[x], key_length[x]);
  67
  68     if (ptr->hosts[server_key].cursor_active == 0)
  69     {
  70       rc= memcached_connect(ptr, server_key);
  71
  72       if ((memcached_io_write(ptr, server_key, get_command, get_command_length, 0)) == -1)
  73       {
  74         rc= MEMCACHED_SOME_ERRORS;
  75         continue;
  76       }
  77       ptr->hosts[server_key].cursor_active= 1;
  78     }
  79
  80     if ((memcached_io_write(ptr, server_key, keys[x], key_length[x], 0)) == -1)
  81     {
  82       ptr->hosts[server_key].cursor_active= 0;
  83       rc= MEMCACHED_SOME_ERRORS;
  84       continue;
  85     }
  86
  87     if ((memcached_io_write(ptr, server_key, " ", 1, 0)) == -1)
  88     {
  89       ptr->hosts[server_key].cursor_active= 0;
  90       rc= MEMCACHED_SOME_ERRORS;
  91       continue;
  92     }
  93   }
  94
  95   /*
  96     Should we muddle on if some servers are dead?
  97   */
  98   for (x= 0; x < ptr->number_of_hosts; x++)
  99   {
 100     if (ptr->hosts[x].cursor_active == 1)
 101     {
 102       /* We need to doo something about non-connnected hosts in the future */
 103       if ((memcached_io_write(ptr, x, "\r\n", 2, 1)) == -1)
 104       {
 105         rc= MEMCACHED_SOME_ERRORS;
 106       }
 107     }
 108   }
 109
 110   LIBMEMCACHED_MEMCACHED_MGET_END();
 111   return rc;
 112 }