private T Set(CompositeCacheKey key, T cacheObject)
{
//randomize cache to imporve rehydration results (don't expire too many at the same time
var minutes = Random.Next(45, 50);
var span = TimeSpan.FromMinutes(minutes);
//soft expire the cache in half this time
CacheExpiration[key] = DateTime.UtcNow.AddMinutes(minutes / 2d);
return(_memCache.Set(key, cacheObject, span));
}
public T Get(CompositeCacheKey key)
{
// ReSharper disable once InconsistentlySynchronizedField
if (_memCache.TryGetValue(key, out T returnValue))
{
return(returnValue);
}
lock (MyLock)
{
//double check in case of race to cache
if (_memCache.TryGetValue(key, out returnValue))
{
return(returnValue);
}
//otherwise lookup the data
return(Set(key, Factory(key.SubKeys, new CancellationToken()).Result));
}
}
public void ExpireCache(CompositeCacheKey key, DateTime expiration)
{
ExpireCache(new CacheExpiration {
CacheKey = key, Expiration = expiration
});
}
public void ExpireCache(CompositeCacheKey key)
{
ExpireCache(key, _dateTime.UtcNow);
}