The TTL command returns the remaining time to live in seconds of a key that has an
{@link #expire(string, int) EXPIRE} set. This introspection capability allows a Redis client to
check how many seconds a given key will continue to be part of the dataset.
@param key
@return Integer reply, returns the remaining time to live in seconds of a key that has an
EXPIRE. In Redis 2.6 or older, if the Key does not exists or does not have an
associated expire, -1 is returned. In Redis 2.8 or newer, if the Key does not have an
associated expire, -1 is returned or if the Key does not exists, -2 is returned.
The TTL command returns the remaining time to live in seconds of a key that has an {@link #expire(string, int) EXPIRE} set. This introspection capability allows a Redis client to check how many seconds a given key will continue to be part of the dataset. @param key @return Integer reply, returns the remaining time to live in seconds of a key that has an EXPIRE. In Redis 2.6 or older, if the Key does not exists or does not have an associated expire, -1 is returned. In Redis 2.8 or newer, if the Key does not have an associated expire, -1 is returned or if the Key does not exists, -2 is returned.