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/* LibMemcached
* Copyright (C) 2011-2012 Data Differential, http://datadifferential.com/
* Copyright (C) 2006-2009 Brian Aker
* All rights reserved.
*
* Use and distribution licensed under the BSD license. See
* the COPYING file in the parent directory for full text.
*
* Summary:
*
*/
/*
Execute a memcached_set() a set of pairs.
Return the number of rows set.
*/
#include <mem_config.h>
#include "clients/execute.h"
unsigned int execute_set(memcached_st *memc, pairs_st *pairs, unsigned int number_of)
{
unsigned int x;
unsigned int pairs_sent;
for (x= 0, pairs_sent= 0; x < number_of; x++)
{
memcached_return_t rc= memcached_set(memc, pairs[x].key, pairs[x].key_length,
pairs[x].value, pairs[x].value_length,
0, 0);
if (memcached_failed(rc))
{
fprintf(stderr, "%s:%d Failure on insert (%s) of %.*s\n",
__FILE__, __LINE__,
memcached_last_error_message(memc),
(unsigned int)pairs[x].key_length, pairs[x].key);
// We will try to reconnect and see if that fixes the issue
memcached_quit(memc);
}
else
{
pairs_sent++;
}
}
return pairs_sent;
}
/*
Execute a memcached_get() on a set of pairs.
Return the number of rows retrieved.
*/
unsigned int execute_get(memcached_st *memc, pairs_st *pairs, unsigned int number_of)
{
unsigned int x;
unsigned int retrieved;
for (retrieved= 0,x= 0; x < number_of; x++)
{
size_t value_length;
uint32_t flags;
unsigned int fetch_key= (unsigned int)((unsigned int)random() % number_of);
memcached_return_t rc;
char *value= memcached_get(memc, pairs[fetch_key].key, pairs[fetch_key].key_length,
&value_length, &flags, &rc);
if (memcached_failed(rc))
{
fprintf(stderr, "%s:%d Failure on read(%s) of %.*s\n",
__FILE__, __LINE__,
memcached_last_error_message(memc),
(unsigned int)pairs[fetch_key].key_length, pairs[fetch_key].key);
}
else
{
retrieved++;
}
::free(value);
}
return retrieved;
}
/**
* Callback function to count the number of results
*/
static memcached_return_t callback_counter(const memcached_st *ptr,
memcached_result_st *result,
void *context)
{
(void)ptr;
(void)result;
unsigned int *counter= (unsigned int *)context;
*counter= *counter + 1;
return MEMCACHED_SUCCESS;
}
/**
* Try to run a large mget to get all of the keys
* @param memc memcached handle
* @param keys the keys to get
* @param key_length the length of the keys
* @param number_of the number of keys to try to get
* @return the number of keys received
*/
unsigned int execute_mget(memcached_st *memc,
const char * const *keys,
size_t *key_length,
unsigned int number_of)
{
unsigned int retrieved= 0;
memcached_execute_fn callbacks[]= { callback_counter };
memcached_return_t rc;
rc= memcached_mget_execute(memc, keys, key_length,
(size_t)number_of, callbacks, &retrieved, 1);
if (rc == MEMCACHED_SUCCESS || rc == MEMCACHED_NOTFOUND ||
rc == MEMCACHED_BUFFERED || rc == MEMCACHED_END)
{
rc= memcached_fetch_execute(memc, callbacks, (void *)&retrieved, 1);
if (rc != MEMCACHED_SUCCESS && rc != MEMCACHED_NOTFOUND && rc != MEMCACHED_END)
{
fprintf(stderr, "%s:%d Failed to execute mget: %s\n",
__FILE__, __LINE__,
memcached_strerror(memc, rc));
memcached_quit(memc);
return 0;
}
}
else
{
fprintf(stderr, "%s:%d Failed to execute mget: %s\n",
__FILE__, __LINE__,
memcached_strerror(memc, rc));
memcached_quit(memc);
return 0;
}
return retrieved;
}
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