/// <summary>
/// Get Cache value if key exist and cast it to <see cref="TItem"/>. Or create cache entry
/// </summary>
/// <param name="cache">Cache instance</param>
/// <param name="key">Cache key</param>
/// <param name="fabric">Fabric for build Cache value</param>
/// <param name="ttl">Ttl for cache entry <see cref="CacheEntryOptions.Ttl"/></param>
/// <typeparam name="TItem">Cast value to this Type</typeparam>
/// <returns>Value of cache casted to <see cref="TItem"/></returns>
public static TItem GetOrCreate <TItem>(this ICache cache, string key, Func <TItem> fabric, TimeSpan ttl)
{
var options = new CacheEntryOptions()
{
Ttl = ttl
};
return(cache.GetOrCreate(key, fabric, options));
}
/// <summary>
/// Create or update cache entry and set ttl on entry
/// </summary>
/// <param name="cache">Cache instance</param>
/// <param name="key">Cache key</param>
/// <param name="value">Cache value</param>
/// <param name="ttl">Ttl for cache entry <see cref="CacheEntryOptions.Ttl"/></param>
public static void Set(this ICache cache, string key, object value, TimeSpan ttl)
{
var entryOptions = new CacheEntryOptions()
{
Ttl = ttl,
};
var entry = new CacheEntry(key, value, entryOptions);
cache.Set(key, entry);
}
/// <summary>
/// Constructor for create new cache entry
/// </summary>
/// <param name="key">Key of cache</param>
/// <param name="value">Value of cache</param>
/// <param name="options"><see cref="CacheEntryOptions"/> of <see cref="CacheEntry"/></param>
public CacheEntry(string key, object value, CacheEntryOptions options)
{
Key = key ?? throw new ArgumentNullException(nameof(key));
Value = value ?? throw new ArgumentNullException(nameof(value));
_options = options;
_options = options ?? throw new ArgumentNullException(nameof(options));
if (options.Ttl != null)
{
_expireDateTime = DateTime.Now + options.Ttl;
}
}
/// <summary>
/// Create or update cache entry and set ttl and callback on entry
/// </summary>
/// <param name="cache">Cache instance</param>
/// <param name="key">Cache key</param>
/// <param name="value">Cache value</param>
/// <param name="ttl">Ttl for cache entry <see cref="CacheEntryOptions.Ttl"/></param>
/// <param name="updateDataCallback">Callback for execute after <see cref="ttl"/> expired</param>
public static void Set(this ICache cache, string key, object value, TimeSpan ttl,
Func <object> updateDataCallback)
{
var entryOptions = new CacheEntryOptions()
{
Ttl = ttl,
UpdateDataCallback = updateDataCallback,
IsAutoDeleted = false
};
var entry = new CacheEntry(key, value, entryOptions);
cache.Set(key, entry);
}
/// <summary>
/// Get Cache value if key exist and cast it to <see cref="TItem"/>. Or create cache entry
/// </summary>
/// <param name="cache">Cache instance</param>
/// <param name="key">Cache key</param>
/// <param name="fabric">Fabric for build Cache value</param>
/// <param name="options"><see cref="CacheEntryOptions"/> specified for <see cref="CacheEntry"/> if it not in Cache yet</param>
/// <typeparam name="TItem">Type of Cache value</typeparam>
/// <returns>Value of cache casted to <see cref="TItem"/></returns>
public static TItem GetOrCreate <TItem>(this ICache cache, string key, Func <TItem> fabric, CacheEntryOptions options)
{
if (cache.TryGet <TItem>(key, out var value))
{
return(value);
}
value = fabric();
var cacheEntry = new CacheEntry(key, value, options);
cache.Set(key, cacheEntry);
return(value);
}