public async Task <Model.CachedObject <TResult> > GetAsync <TResult>(Core.Util.ProxiedMethodInvocation <T, TResult> proxiedMethodInvocation, CachePolicy cachePolicy)
{
var key = proxiedMethodInvocation.GetHashString(_hashScramble);
var data = await _redis.Get(key);
if (data != null)
{
RedisObject <TResult> cacheItem;
using (var dataStream = new MemoryStream(data))
{
using (var zipStream = new GZipStream(dataStream, CompressionMode.Decompress))
{
using (var streamReader = new StreamReader(zipStream))
{
var textReader = new JsonTextReader(streamReader);
try
{
cacheItem = _serializer.Deserialize <RedisObject <TResult> >(textReader);
}
catch (JsonSerializationException)
{
//This exception occurs if whatever is in Redis is impossible to deserialize. It's a tricky case, but we'll have to report back that nothing is in there.
return(new CachedObject <TResult>(CachedObjectState.None, default(TResult)));
}
}
}
}
if (cacheItem == null)
{
return(new CachedObject <TResult>(CachedObjectState.None, default(TResult)));
}
if (cacheItem.IsException && cacheItem.Created.AddSeconds(cachePolicy.ExceptionCacheDuration) > DateTime.Now)
{
return(new CachedObject <TResult>(CachedObjectState.Exception, cacheItem.Exception));
}
else if (cacheItem.IsException)
{
return(new CachedObject <TResult>(CachedObjectState.None, default(TResult)));
}
var fresh = cacheItem.Created.AddSeconds(cachePolicy.CacheDuration) > DateTime.Now;
var state = fresh ? CachedObjectState.Fresh : CachedObjectState.Stale;
if (cachePolicy.DiscardStale && state == CachedObjectState.Stale)
{
return(new CachedObject <TResult>(CachedObjectState.None, default(TResult)));
}
return(new CachedObject <TResult>(state, cacheItem.Object));
}
return(new CachedObject <TResult>(CachedObjectState.None, default(TResult)));
}
public async Task StoreAsync <TResult>(Core.Util.ProxiedMethodInvocation <T, TResult> proxiedMethodInvocation, CachePolicy cachePolicy, TResult data)
{
var key = proxiedMethodInvocation.GetHashString(_hashScramble);
var cachedObject = new RedisObject <TResult>()
{
Created = DateTime.Now,
Object = data
};
var bytes = SerializeAndZip(cachedObject);
if (cachePolicy.MaxAge > 0)
{
await _redis.Set(key, bytes, TimeSpan.FromSeconds(cachePolicy.MaxAge));
}
else
{
await _redis.Set(key, bytes);
}
}