Sonarr/NzbDrone.Common/Cache/Cached.cs

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using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
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using NzbDrone.Common.EnsureThat;
namespace NzbDrone.Common.Cache
{
public class Cached<T> : ICached<T>
{
private readonly ConcurrentDictionary<string, T> _store;
public Cached()
{
_store = new ConcurrentDictionary<string, T>();
}
public void Set(string key, T value)
{
Ensure.That(() => key).IsNotNullOrWhiteSpace();
_store[key] = value;
}
public T Get(string key)
{
return Get(key, () => { throw new KeyNotFoundException(key); });
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}
public T Find(string key)
{
T value;
_store.TryGetValue(key, out value);
return value;
}
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public T Get(string key, Func<T> function)
{
Ensure.That(() => key).IsNotNullOrWhiteSpace();
T value;
if (!_store.TryGetValue(key, out value))
{
value = function();
Set(key, value);
}
return value;
}
public bool ContainsKey(string key)
{
Ensure.That(() => key).IsNotNullOrWhiteSpace();
return _store.ContainsKey(key);
}
public void Clear()
{
_store.Clear();
}
public void Remove(string key)
{
Ensure.That(() => key).IsNotNullOrWhiteSpace();
T value;
_store.TryRemove(key, out value);
}
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public ICollection<T> Values
{
get
{
return _store.Values;
}
}
public ICollection<string> Keys
{
get
{
return _store.Keys;
}
}
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}
}