private async Task <SemaphoreSlim> GetOrCreateLockAsync(
string key,
DistributedCacheEntryOptions?distributedCacheEntryOptions,
CancellationToken cancellationToken = default)
{
await KeySemaphore.WaitAsync(cancellationToken);
try
{
return(await L1Cache.GetOrCreateAsync(
$"{L1L2RedisCacheOptions.LockKeyPrefix}{key}",
cacheEntry =>
{
cacheEntry.AbsoluteExpiration =
distributedCacheEntryOptions?.AbsoluteExpiration;
cacheEntry.AbsoluteExpirationRelativeToNow =
distributedCacheEntryOptions?.AbsoluteExpirationRelativeToNow;
cacheEntry.SlidingExpiration =
distributedCacheEntryOptions?.SlidingExpiration;
return Task.FromResult(new SemaphoreSlim(1, 1));
}) ??
new SemaphoreSlim(1, 1));
}
finally
{
KeySemaphore.Release();
}
}