public bool Lock(RedisKey resource, TimeSpan ttl, out Lock lockObject)
{
var val = CreateUniqueLockId();
Lock innerLock = null;
bool successfull = retry(DefaultRetryCount, DefaultRetryDelay, () =>
{
try
{
int n = 0;
var startTime = DateTime.Now;
// Use keys
for_each_redis_registered(
redis =>
{
if (LockInstance(redis, resource, val, ttl)) n += 1;
}
);
/*
* Add 2 milliseconds to the drift to account for Redis expires
* precision, which is 1 milliescond, plus 1 millisecond min drift
* for small TTLs.
*/
var drift = Convert.ToInt32((ttl.TotalMilliseconds * ClockDriveFactor) + 2);
var validity_time = ttl - (DateTime.Now - startTime) - new TimeSpan(0, 0, 0, 0, drift);
if (n >= Quorum && validity_time.TotalMilliseconds > 0)
{
innerLock = new Lock(resource, val, validity_time);
return true;
}
else
{
for_each_redis_registered(
redis =>
{
UnlockInstance(redis, resource, val);
}
);
return false;
}
}
catch (Exception)
{ return false; }
});
lockObject = innerLock;
return successfull;
}
public void Unlock(Lock lockObject)
{
for_each_redis_registered(redis =>
{
UnlockInstance(redis, lockObject.Resource, lockObject.Value);
});
}