/// <summary>
/// Creates a new instance of <see cref="CacheItem"/> object.
/// </summary>
/// <param name="key">The key of the cache item.</param>
/// <param name="value">The value of the cache item.</param>
/// <param name="expirationInMinutes">The expiration in minutes of the cache item.</param>
public CacheItem(string key, object value, int expirationInMinutes)
{
if (expirationInMinutes < 0)
{
throw new ArgumentOutOfRangeException("Expiration in minutes must not be negative values.");
}
Key = key;
Value = value;
CreatedDate = DateTime.UtcNow;
Expiration = CreatedDate.AddMinutes(expirationInMinutes);
}
/// <summary>
/// Updates the value of the current item based from the source item.
/// </summary>
/// <param name="item">The source item.</param>
/// <param name="throwException">Throws an exception if the operation has failed to update an item.</param>
internal void UpdateFrom(CacheItem <T> item,
bool throwException = true)
{
if (!IsExpired() && throwException)
{
throw new InvalidOperationException($"Cannot update the item that is not yet expired.");
}
Value = item.Value;
CreatedDate = item.CreatedDate;
Expiration = CreatedDate.AddMinutes(item.CacheItemExpiration ?? Constant.DefaultCacheItemExpirationInMinutes);
}
/// <summary>
/// Updates the value of the current item based from the source item.
/// </summary>
/// <param name="item">The source item.</param>
internal void UpdateFrom(CacheItem <T> item)
{
if (!IsExpired())
{
throw new InvalidOperationException($"Cannot update the item that is not yet expired.");
}
else
{
Value = item.Value;
CreatedDate = DateTime.UtcNow;
Expiration = CreatedDate.AddMinutes(Constant.DefaultCacheItemExpirationInMinutes);
}
}
/// <summary>
/// Creates a new instance of <see cref="CacheItem"/> object.
/// </summary>
/// <param name="key">The key of the cache item.</param>
/// <param name="value">The value of the cache item.</param>
/// <param name="cacheItemExpiration">The expiration in minutes of the cache item.</param>
public CacheItem(string key,
T value,
int cacheItemExpiration = Constant.DefaultCacheItemExpirationInMinutes)
{
if (cacheItemExpiration < 0)
{
throw new ArgumentOutOfRangeException("Expiration in minutes must not be negative values.");
}
Key = key;
Value = value;
CacheItemExpiration = cacheItemExpiration;
CreatedDate = DateTime.UtcNow;
Expiration = CreatedDate.AddMinutes(cacheItemExpiration);
}
public void SetOffset(int minutes)
{
CreatedDate = CreatedDate?.AddMinutes(minutes);
}
