git.m6w6.name Git - awesomized/libmemcached/blob - clients/execute.cc

   1 /* LibMemcached
   2  * Copyright (C) 2006-2009 Brian Aker
   3  * All rights reserved.
   4  *
   5  * Use and distribution licensed under the BSD license.  See
   6  * the COPYING file in the parent directory for full text.
   7  *
   8  * Summary:
   9  *
  10  */
  11
  12 /*
  13   Execute a memcached_set() a set of pairs.
  14   Return the number of rows set.
  15 */
  16
  17 #include <config.h>
  18 #include "execute.h"
  19
  20 unsigned int execute_set(memcached_st *memc, pairs_st *pairs, unsigned int number_of)
  21 {
  22   unsigned int x;
  23   unsigned int pairs_sent;
  24
  25   for (x= 0, pairs_sent= 0; x < number_of; x++)
  26   {
  27     memcached_return_t rc= memcached_set(memc, pairs[x].key, pairs[x].key_length,
  28                                          pairs[x].value, pairs[x].value_length,
  29                                          0, 0);
  30     if (rc != MEMCACHED_SUCCESS and rc != MEMCACHED_BUFFERED)
  31     {
  32       fprintf(stderr, "Failure on insert (%s) of %.*s\n",
  33               memcached_last_error_message(memc),
  34               (unsigned int)pairs[x].key_length, pairs[x].key);
  35     }
  36     else
  37     {
  38       pairs_sent++;
  39     }
  40   }
  41
  42   return pairs_sent;
  43 }
  44
  45 /*
  46   Execute a memcached_get() on a set of pairs.
  47   Return the number of rows retrieved.
  48 */
  49 unsigned int execute_get(memcached_st *memc, pairs_st *pairs, unsigned int number_of)
  50 {
  51   memcached_return_t rc;
  52   unsigned int x;
  53   unsigned int retrieved;
  54
  55
  56   for (retrieved= 0,x= 0; x < number_of; x++)
  57   {
  58     char *value;
  59     size_t value_length;
  60     uint32_t flags;
  61     unsigned int fetch_key;
  62
  63     fetch_key= (unsigned int)((unsigned int)random() % number_of);
  64
  65     value= memcached_get(memc, pairs[fetch_key].key, pairs[fetch_key].key_length,
  66                          &value_length, &flags, &rc);
  67
  68     if (rc != MEMCACHED_SUCCESS)
  69     {
  70       fprintf(stderr, "Failure on read(%s) of %.*s\n",
  71               memcached_last_error_message(memc),
  72               (unsigned int)pairs[fetch_key].key_length, pairs[fetch_key].key);
  73     }
  74     else
  75     {
  76       retrieved++;
  77     }
  78
  79     ::free(value);
  80   }
  81
  82   return retrieved;
  83 }
  84
  85 /**
  86  * Callback function to count the number of results
  87  */
  88 static memcached_return_t callback_counter(const memcached_st *ptr,
  89                                            memcached_result_st *result,
  90                                            void *context)
  91 {
  92   (void)ptr;
  93   (void)result;
  94   unsigned int *counter= (unsigned int *)context;
  95   *counter= *counter + 1;
  96
  97   return MEMCACHED_SUCCESS;
  98 }
  99
 100 /**
 101  * Try to run a large mget to get all of the keys
 102  * @param memc memcached handle
 103  * @param keys the keys to get
 104  * @param key_length the length of the keys
 105  * @param number_of the number of keys to try to get
 106  * @return the number of keys received
 107  */
 108 unsigned int execute_mget(memcached_st *memc,
 109                           const char * const *keys,
 110                           size_t *key_length,
 111                           unsigned int number_of)
 112 {
 113   unsigned int retrieved= 0;
 114   memcached_execute_fn callbacks[]= { callback_counter };
 115   memcached_return_t rc;
 116   rc= memcached_mget_execute(memc, keys, key_length,
 117                              (size_t)number_of, callbacks, &retrieved, 1);
 118
 119   if (rc == MEMCACHED_SUCCESS || rc == MEMCACHED_NOTFOUND ||
 120           rc == MEMCACHED_BUFFERED || rc == MEMCACHED_END)
 121   {
 122     rc= memcached_fetch_execute(memc, callbacks, (void *)&retrieved, 1);
 123     if (rc != MEMCACHED_SUCCESS && rc != MEMCACHED_NOTFOUND && rc != MEMCACHED_END)
 124     {
 125       fprintf(stderr, "Failed to execute mget: %s\n",
 126               memcached_strerror(memc, rc));
 127       memcached_quit(memc);
 128       return 0;
 129     }
 130   }
 131   else
 132   {
 133     fprintf(stderr, "Failed to execute mget: %s\n",
 134             memcached_strerror(memc, rc));
 135     memcached_quit(memc);
 136     return 0;
 137   }
 138
 139   return retrieved;
 140 }