/// <summary>
/// Notify the metric reporter that the cache size has changed.
/// </summary>
/// <param name="name">
/// The cache name. This cannot be null, empty or whitespace.
/// </param>
/// <exception cref="ArgumentNullException">
/// <paramref name="name"/> cannot be null, empty or whitespace.
/// </exception>
public override void NotifySizeChange(string name)
{
if (string.IsNullOrWhiteSpace(name))
{
throw new ArgumentNullException(nameof(name));
}
UpdateSizeCounter(name, SizeCallbacks[name]());
}
/// <summary>
/// Remove the size callback added through <see cref="AddSizeCallback"/>.
/// Do nothing if there is no callback for <paramref name="name"/>.
/// </summary>
/// <param name="name">
/// The cache name. This cannot be null, empty or whitespace.
/// </param>
/// <exception cref="ArgumentNullException">
/// <paramref name="name"/> cannot be null, empty or whitespace.
/// </exception>
public void RemoveSizeCallback(string name)
{
if (string.IsNullOrWhiteSpace(name))
{
throw new ArgumentNullException(nameof(name));
}
Func <long> oldGetSize;
SizeCallbacks.TryRemove(name, out oldGetSize);
}
/// <summary>
/// Add a callback to get the named cache's current size.
/// </summary>
/// <param name="name">
/// The cache name. This cannot be null, empty or whitespace.
/// </param>
/// <param name="getSize">
/// A function that returns the cache size. This cannot be null.
/// </param>
/// <exception cref="ArgumentNullException">
/// <paramref name="name"/> cannot be null, empty or whitespace.
/// <paramref name="getSize"/> cannot be null.
/// </exception>
public void AddSizeCallback(string name, Func <long> getSize)
{
if (string.IsNullOrWhiteSpace(name))
{
throw new ArgumentNullException(nameof(name));
}
if (getSize == null)
{
throw new ArgumentNullException(nameof(getSize));
}
SizeCallbacks.AddOrUpdate(name, n => getSize, (n, gs) => getSize);
ZeroSizeCounter(name);
}
/// <summary>
/// Dispose
/// </summary>
public virtual void Dispose()
{
CleanUpCounters();
SizeCallbacks.Clear();
HitsAndMissesCallbacks.Clear();
}
