/// <summary>
/// Deserializes the entire input of JSON-serialized values into a list of key-object pairs. This
/// method is not normally used in RedisSessionProvider, here only for debugging purposes.
/// </summary>
/// <param name="redisHashDataRaw">A dictionary of Redis Hash contents, with key being Redis key
/// corresponding to Session property and value being a JSON encoded string with type info
/// of the original object</param>
/// <returns>A list of key-object pairs of each entry in the input dictionary</returns>
public virtual List <KeyValuePair <string, object> > Deserialize(KeyValuePair <RedisValue, RedisValue>[] redisHashDataRaw)
{
// process: for each key and value in raw data, convert byte[] field to json string and extract its type property
// then deserialize that type and add
var deserializedList = new List <KeyValuePair <string, object> >();
if (redisHashDataRaw != null)
{
foreach (var keyFieldPair in redisHashDataRaw)
{
try
{
object deserializedObj = this.DeserializeOne(keyFieldPair.Value.ToString());
if (deserializedObj != null)
{
deserializedList.Add(new KeyValuePair <string, object>(keyFieldPair.Key.ToString(), deserializedObj));
}
}
catch (Exception e)
{
RedisSerializationConfig.LogSerializationException(e);
}
}
}
return(deserializedList);
}
private Type GetDeserializationType(string objRaw, string typeInfoString)
{
Type typeData;
if (this.TypeInfoShortcutsDsrlz.ContainsKey(typeInfoString))
{
return(this.TypeInfoShortcutsDsrlz[typeInfoString]);
}
else if (RedisJSONSerializer.TypeCache.TryGetValue(typeInfoString, out typeData))
{
// great, we have it in cache
}
else
{
typeData = JsonConvert.DeserializeObject <Type>(typeInfoString);
#region tryCacheTypeInfo
try
{
// we should cache it for future use
TypeCache.AddOrUpdate(typeInfoString, typeData, (str, existing) => typeData); // replace with our type data if already exists
}
catch (Exception cacheExc)
{
RedisSerializationConfig.LogSerializationException(new TypeCacheException(string.Format("Unable to cache type info for raw value '{0}' during deserialization", objRaw), cacheExc));
}
#endregion
}
return(typeData);
}
/// <summary>
/// If the key has been deserialized already, return the current object value we have on hand
/// for it. If it has not, then deserialize it from initial Redis input and add it to the base
/// collection.
/// </summary>
/// <param name="key">The desired Session key name</param>
/// <returns>The deserialized object at the key, or null if it does not exist.</returns>
protected object MemoizedDeserializeGet(string key)
{
object storedObj = null;
if (this.Items.TryGetValue(key, out storedObj))
{
if (storedObj is NotYetDeserializedPlaceholderValue)
{
string serializedData;
if (this.SerializedRawData.TryGetValue(key, out serializedData))
{
try
{
var placeholderReference = storedObj;
storedObj = this.Serializer.DeserializeOne(serializedData);
// if we can't deserialize, storedObj will still be the placeholder and in that case it's
// as if the DeserializeOne method error'ed, so mark it as failed to deserialize
if (storedObj is NotYetDeserializedPlaceholderValue)
{
storedObj = null;
}
// Try to update the key to the deserialized object. If it fails, check to make sure that its
// not because it was already deserialized in another thread
if (!this.Items.TryUpdate(key, storedObj, placeholderReference))
{
// the update failed, this could be because the comparison value was different for the
// concurrentDictionary, so lets try fetching the value again
if (this.Items.TryGetValue(key, out storedObj))
{
// if it is not a placeholder, return the re-fetched object from the Items collection
if (!(storedObj is NotYetDeserializedPlaceholderValue))
{
return(storedObj);
}
}
}
}
catch (Exception e)
{
RedisSerializationConfig.LogSerializationException(e);
storedObj = null;
}
}
}
}
return(storedObj);
}
/// <summary>
/// Converts the input dictionary into a dictionary of key to serialized string values
/// </summary>
/// <param name="sessionItems">A dictionary some or all of the Session's keys and values</param>
/// <returns>The serialized version of the input dictionary members</returns>
public virtual KeyValuePair <RedisValue, RedisValue>[] Serialize(List <KeyValuePair <string, object> > sessionItems)
{
var serializedItems = new KeyValuePair <RedisValue, RedisValue> [sessionItems.Count];
for (int i = 0; i < sessionItems.Count; i++)
{
try
{
serializedItems[i] = new KeyValuePair <RedisValue, RedisValue>(sessionItems[i].Key, this.SerializeOne(sessionItems[i].Key, sessionItems[i].Value));
}
catch (Exception e)
{
RedisSerializationConfig.LogSerializationException(e);
}
}
return(serializedItems);
}
