/// <summary>
/// Method to add or update item to be cached into the cache
/// </summary>
/// <param name="key">Cache key</param>
/// <param name="value">Value to be cached</param>
/// <param name="session">Session key</param>
/// <param name="cacheTime">Time after item to be removed from cache</param>
/// <returns>Returns boolean indicating if item is added or not</returns>
public bool AddOrUpdate(string key, object value, string session, TimeSpan cacheTime)
{
if (string.IsNullOrEmpty(key))
{
throw new ArgumentNullException(nameof(key));
}
if (value == null)
{
throw new ArgumentNullException(nameof(value));
}
var cachedItemKey = new CachedItemKey(key, session);
Timer timer = new Timer(new TimerCallback(TimerProc), cachedItemKey, cacheTime, TimeSpan.FromMilliseconds(-1));
var addOrUpdatedValue = this.memoryCache.AddOrUpdate(cachedItemKey, value, (cacheKey, oldValue) => oldValue = value);
return(addOrUpdatedValue != null);
void TimerProc(object state)
{
var cacheKey = (CachedItemKey)state;
this.Remove(cacheKey);
}
}
/// <summary>
/// Removes cached item from in-memory cache
/// </summary>
/// <param name="key">Cache key</param>
/// <param name="session">Session key</param>
/// <returns>Returns boolean indicating if cached item is removed or not</returns>
public bool Remove(string key, string session)
{
if (string.IsNullOrEmpty(key))
{
throw new ArgumentNullException(nameof(key));
}
var cacheKey = new CachedItemKey(key, session);
return(this.Remove(cacheKey));
}
/// <summary>
/// Internal method to remove cached item from in-memory cache
/// </summary>
/// <param name="cachedItemKey">Cache key</param>
/// <returns>Returns boolean indicating if cached item is removed or not</returns>
private bool Remove(CachedItemKey cachedItemKey)
{
object value = null;
if (this.memoryCache?.ContainsKey(cachedItemKey) == true)
{
this.memoryCache?.TryRemove(cachedItemKey, out value);
}
return(value != null);
}
/// <summary>
/// Get cached item from in-memory cache based
/// </summary>
/// <param name="key">cache key</param>
/// <param name="session">session key</param>
/// <returns>cached item</returns>
public object Get(string key, string session)
{
if (string.IsNullOrEmpty(key))
{
throw new ArgumentNullException(nameof(key));
}
object value = null;
var cacheKey = new CachedItemKey(key, session);
if (this.memoryCache?.ContainsKey(cacheKey) == true)
{
this.memoryCache?.TryGetValue(cacheKey, out value);
}
return(value);
}
