protected object Get(ICacheKey key)
{
try
{
_lock.EnterUpgradeableReadLock();
object value;
if(cache.TryGetValue(key.GetStringKey(), out value))
{
return value;
}
OnMiss(key, out value);
var cacheKey = BuildUniqueStringKey(key);
var opts = new MemoryCacheEntryOptions();
if (_useAbsoluteExpiration)
{
opts.AbsoluteExpiration = AbsoluteExpiration;
}
else if (_useSlidingExpiration)
{
opts.SlidingExpiration = SlidingExpirationSpan;
}
cache.Set(key.GetStringKey(), value, opts);
return value;
}
finally
{
if(_lock.IsUpgradeableReadLockHeld)
{
_lock.ExitUpgradeableReadLock();
}
}
}
private string BuildUniqueStringKey(ICacheKey key)
{
return String.Format("{0};{1};{2}", GetType().FullName, key.GetType().FullName, key.GetStringKey());
}