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 "clients/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 (memcached_failed(rc))
  31     {
  32       fprintf(stderr, "%s:%d Failure on insert (%s) of %.*s\n",
  33               __FILE__, __LINE__,
  34               memcached_last_error_message(memc),
  35               (unsigned int)pairs[x].key_length, pairs[x].key);
  36
  37       // We will try to reconnect and see if that fixes the issue
  38       memcached_quit(memc);
  39     }
  40     else
  41     {
  42       pairs_sent++;
  43     }
  44   }
  45
  46   return pairs_sent;
  47 }
  48
  49 /*
  50   Execute a memcached_get() on a set of pairs.
  51   Return the number of rows retrieved.
  52 */
  53 unsigned int execute_get(memcached_st *memc, pairs_st *pairs, unsigned int number_of)
  54 {
  55   unsigned int x;
  56   unsigned int retrieved;
  57
  58
  59   for (retrieved= 0,x= 0; x < number_of; x++)
  60   {
  61     size_t value_length;
  62     uint32_t flags;
  63
  64     unsigned int fetch_key= (unsigned int)((unsigned int)random() % number_of);
  65
  66     memcached_return_t rc;
  67     char *value= memcached_get(memc, pairs[fetch_key].key, pairs[fetch_key].key_length,
  68                                &value_length, &flags, &rc);
  69
  70     if (memcached_failed(rc))
  71     {
  72       fprintf(stderr, "%s:%d Failure on read(%s) of %.*s\n",
  73               __FILE__, __LINE__,
  74               memcached_last_error_message(memc),
  75               (unsigned int)pairs[fetch_key].key_length, pairs[fetch_key].key);
  76     }
  77     else
  78     {
  79       retrieved++;
  80     }
  81
  82     ::free(value);
  83   }
  84
  85   return retrieved;
  86 }
  87
  88 /**
  89  * Callback function to count the number of results
  90  */
  91 static memcached_return_t callback_counter(const memcached_st *ptr,
  92                                            memcached_result_st *result,
  93                                            void *context)
  94 {
  95   (void)ptr;
  96   (void)result;
  97   unsigned int *counter= (unsigned int *)context;
  98   *counter= *counter + 1;
  99
 100   return MEMCACHED_SUCCESS;
 101 }
 102
 103 /**
 104  * Try to run a large mget to get all of the keys
 105  * @param memc memcached handle
 106  * @param keys the keys to get
 107  * @param key_length the length of the keys
 108  * @param number_of the number of keys to try to get
 109  * @return the number of keys received
 110  */
 111 unsigned int execute_mget(memcached_st *memc,
 112                           const char * const *keys,
 113                           size_t *key_length,
 114                           unsigned int number_of)
 115 {
 116   unsigned int retrieved= 0;
 117   memcached_execute_fn callbacks[]= { callback_counter };
 118   memcached_return_t rc;
 119   rc= memcached_mget_execute(memc, keys, key_length,
 120                              (size_t)number_of, callbacks, &retrieved, 1);
 121
 122   if (rc == MEMCACHED_SUCCESS || rc == MEMCACHED_NOTFOUND ||
 123           rc == MEMCACHED_BUFFERED || rc == MEMCACHED_END)
 124   {
 125     rc= memcached_fetch_execute(memc, callbacks, (void *)&retrieved, 1);
 126     if (rc != MEMCACHED_SUCCESS && rc != MEMCACHED_NOTFOUND && rc != MEMCACHED_END)
 127     {
 128       fprintf(stderr, "%s:%d Failed to execute mget: %s\n",
 129               __FILE__, __LINE__,
 130               memcached_strerror(memc, rc));
 131       memcached_quit(memc);
 132       return 0;
 133     }
 134   }
 135   else
 136   {
 137     fprintf(stderr, "%s:%d Failed to execute mget: %s\n",
 138             __FILE__, __LINE__,
 139             memcached_strerror(memc, rc));
 140     memcached_quit(memc);
 141     return 0;
 142   }
 143
 144   return retrieved;
 145 }