| LIBMEMCACHED_EXAMPLES(3) | libmemcached-awesome | 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¶
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¶
char *key= "foo"; char *value= "value"; time_t expires = 0; uint32_t flags = 0; memcached_return_t rc = memcached_set(memc,
key, strlen(key),
value, value_length,
expires, flags); 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.
SEE ALSO¶
| November 12, 2021 | 1.1 |