2. EL 8
  3. libmemcached-devel
  4. libmemcached_examples(3)

Scroll to navigation

LIBMEMCACHED_EXAMPLES(3) libmemcached LIBMEMCACHED_EXAMPLES(3)

NAME

libmemcached_examples - libmemcached Documentation

Examples for libmemcached

DESCRIPTION

For full examples, test cases are found in tests/*.c in the main distribution. These are always up to date, and are used for each test run of the library.

CONNECTING TO SERVERS

const char *config_string= "--SERVER=host10.example.com --SERVER=host11.example.com --SERVER=host10.example.com"
memcached_st *memc= memcached(config_string, strlen(config_string);
{
...
}


 memcached_free(memc);


In the above code you create a memcached_st object with three server by making use of memcached_create().

CREATING A POOL OF SERVERS











Creating a pool of Servers:








const char *config_string= "--SERVER=host10.example.com --SERVER=host11.example.com --SERVER=host10.example.com";
memcached_pool_st* pool= memcached_pool(config_string, strlen(config_string));
memcached_return_t rc;
memcached_st *memc= memcached_pool_pop(pool, false, &rc);
.... do work
/*


  Release the memc_ptr that was pulled from the pool
*/
memcached_pool_push(pool, memc);
/*


  Destroy the pool.
*/
memcached_pool_destroy(pool);











In the above code you create a memcached_pool_st object
    with three server by making use of memcached_pool().


When memcached_pool_destroy() all memory will be released
    that is associated with the pool.






ADDING A VALUE TO THE SERVER


















Adding a value to the Server:








char *key= "foo";
char *value= "value";
memcached_return_t rc= memcached_set(memc, key, strlen(key), value, value_length, (time_t)0, (uint32_t)0);
if (rc != MEMCACHED_SUCCESS)
{
... // handle failure
}











It is best practice to always look at the return value of any
    operation.






FETCHING MULTIPLE VALUES








memcached_return_t rc;
char *keys[]= {"fudge", "son", "food"};
size_t key_length[]= {5, 3, 4};
unsigned int x;
uint32_t flags;
char return_key[MEMCACHED_MAX_KEY];
size_t return_key_length;
char *return_value;
size_t return_value_length;
rc= memcached_mget(memc, keys, key_length, 3);
x= 0;
while ((return_value= memcached_fetch(memc, return_key, &return_key_length,


                                      &return_value_length, &flags, &rc)))
{


  free(return_value);


  x++;
}











Notice that you freed values returned from memcached_fetch(). The
    define MEMCACHED_MAX_KEY is provided for usage.






HOME


To find out more information please check:
    http://libmemcached.org/






SEE ALSO


memcached(1)






AUTHOR


Brian Aker






COPYRIGHT


2011-2013, Brian Aker DataDifferential,
    http://datadifferential.com/







  

    February 9, 2014
    1.0.18