/// <summary>
/// Sets the file watch expiration.
/// </summary>
/// <param name="options">The options.</param>
/// <param name="fileName">Name of the file.</param>
/// <returns>DistributedCacheEntryOptions2.</returns>
public static DistributedCacheEntryOptions2 SetFileWatchExpiration(this DistributedCacheEntryOptions2 options, string fileName)
{
var fileInfo = new FileInfo(fileName);
var fileProvider = new PhysicalFileProvider(fileInfo.DirectoryName);
options.AddExpirationToken(fileProvider.Watch(fileInfo.Name));
return(options);
}
/// <summary>
/// Expire the cache entry if the given <see cref="IChangeToken"/> expires.
/// </summary>
/// <param name="options">The <see cref="MemoryCacheEntryOptions"/>.</param>
/// <param name="expirationToken">The <see cref="IChangeToken"/> that causes the cache entry to expire.</param>
/// <returns>The <see cref="MemoryCacheEntryOptions"/> so that additional calls can be chained.</returns>
public static DistributedCacheEntryOptions2 AddExpirationToken(this DistributedCacheEntryOptions2 options, IChangeToken expirationToken)
{
if (expirationToken == null)
{
throw new ArgumentNullException(nameof(expirationToken));
}
options.ExpirationTokens.Add(expirationToken);
return(options);
}
/// <summary> /// Forces the absolute expiration. /// </summary> /// <param name="options">The options.</param> /// <param name="delay">The delay.</param> /// <returns>DistributedCacheEntryOptions.</returns> public static DistributedCacheEntryOptions2 ForceAbsoluteExpiration(this DistributedCacheEntryOptions2 options, TimeSpan delay) => options.AddExpirationToken(new CancellationChangeToken(new CancellationTokenSource(delay).Token));
/// <summary>
/// Sets the cache entry change expiration.
/// </summary>
/// <param name="options">The options.</param>
/// <param name="cache">The cache.</param>
/// <param name="key">The key.</param>
/// <returns>DistributedCacheEntryOptions2.</returns>
public static DistributedCacheEntryOptions2 SetCacheEntryChangeExpiration(this DistributedCacheEntryOptions2 options, IDistributedCache cache, string key)
{
options.AddExpirationToken(MakeCacheEntryChangeToken(cache, new[] { key }));
return(options);
}