Installs a watch on all the keys under key_prefix
: callback
will be invoked whenever the value of any of these
keys changes (or a key is removed).
this |
the Account. |
key_prefix |
the prefix of the keys to watch. |
callback |
a AccountNotifyCb callback to be called. |
user_data |
pointer to user data, to be passed to |
a AccountWatch, which can then be used to remove this watch. |