Update expiration on a key

SYNOPSIS

#include <libmemcached/memcached.h>
Compile and link with -lmemcached
memcached_return_t memcached_touch(memcached_st *ptr, const char *key, size_t key_length, time_t expiration)
Parameters:
  • ptr -- pointer to initialized memcached_st struct
  • key -- the key to touch
  • key_length -- the length of key without any terminating zero
  • expiration -- new expiration as a unix timestamp or as relative expiration time in seconds
Returns:

memcached_return_t indicating success
memcached_return_t memcached_touch_by_key(memcached_st *ptr, const char *group_key, size_t group_key_length, const char *key, size_t key_length, time_t expiration)
Parameters:
  • ptr -- pointer to initialized memcached_st struct
  • group_key -- the key namespace
  • group_key_length -- the length of group_key without any terminating zero
  • key -- the key to touch
  • key_length -- the length of key without any terminating zero
  • expiration -- new expiration as a unix timestamp or as relative expiration time in seconds
Returns:

memcached_return_t indicating success

DESCRIPTION

memcached_touch() is used to update the expiration time on an existing key. memcached_touch_by_key() works the same, but it takes a master key to find the given value.

RETURN VALUE

A value of type memcached_return_t is returned. On success that value will be MEMCACHED_SUCCESS. Use memcached_strerror() to translate this value to a printable string.