public MemoryData <DT> GetMemoryData <DT>(DT data)
{
var memoryData = new MemoryData <DT>
{
Data = data,
Version = 1,
Id = Guid.NewGuid()
};
return(memoryData);
}
public void UpdateData <T>(IPersistanceData <T> data) where T : class, IProcessManagerData
{
lock (_memoryCacheLock)
{
string error = null;
var newData = (MemoryData <T>)data;
string key = data.Data.CorrelationId.ToString();
//if (Cache.Contains(key))
if (_provider.Contains(key))
{
//var currentVersion = ((MemoryData<T>)(Cache.Get(key))).Version;
var currentVersion = ((MemoryData <T>)(_provider.Get <string, object>(key))).Version;
var updatedData = new MemoryData <T>
{
Data = data.Data,
Version = newData.Version + 1
};
if (currentVersion == newData.Version)
{
//Cache.Set(key, updatedData, _policy);
_provider.Remove(key);
_provider.Add(key, updatedData, _absoluteExpiry);
}
else
{
error = string.Format("Possible Concurrency Error. ProcessManagerData with CorrelationId {0} and Version {1} could not be updated.", key, currentVersion);
}
}
else
{
error = string.Format("ProcessManagerData with CorrelationId {0} does not exist in memory.", key);
}
if (!string.IsNullOrEmpty(error))
{
throw new ArgumentException(error);
}
}
}
public IPersistanceData <T> FindData <T>(IProcessManagerPropertyMapper mapper, Message message) where T : class, IProcessManagerData
{
lock (_memoryCacheLock)
{
var mapping = mapper.Mappings.FirstOrDefault(m => m.MessageType == message.GetType()) ??
mapper.Mappings.First(m => m.MessageType == typeof(Message));
object msgPropValue = null;
try
{
msgPropValue = mapping.MessageProp.Invoke(message);
}
catch
{
return(null);
}
if (null == msgPropValue)
{
throw new ArgumentException("Message property expression evaluates to null");
}
//Left
ParameterExpression pe = Expression.Parameter(typeof(MemoryData <T>), "t");
Expression left = Expression.Property(pe, typeof(MemoryData <T>).GetTypeInfo().GetProperty("Data"));
foreach (var prop in mapping.PropertiesHierarchy.Reverse())
{
left = Expression.Property(left, left.Type, prop.Key);
}
//Right
Expression right = Expression.Constant(msgPropValue, msgPropValue.GetType());
Expression expression;
try
{
expression = Expression.Equal(left, right);
}
catch (InvalidOperationException ex)
{
throw new Exception("Mapped incompatible types of ProcessManager Data and Message properties.", ex);
}
Expression <Func <MemoryData <T>, bool> > lambda = Expression.Lambda <Func <MemoryData <T>, bool> >(expression, pe);
// get all the relevant cache items
//var cacheItems = (from n in Cache.AsParallel() where n.Value.GetType() == typeof(MemoryData<IProcessManagerData>) select n.Value);
IList <object> cacheItems = new List <object>();
foreach (var key in _provider.Keys())
{
var value = _provider.Get <string, object>(key.ToString());
if (value.GetType() == typeof(MemoryData <IProcessManagerData>))
{
cacheItems.Add(value);
}
}
// convert to correct generic type
//var newCacheItems = Enumerable.ToList((from dynamic cacheItem in cacheItems select new MemoryData<T> { Data = cacheItem.Data, Version = cacheItem.Version }));
var newCacheItems = Enumerable.ToList((from dynamic cacheItem in cacheItems select new MemoryData <T> {
Data = cacheItem.Data, Version = cacheItem.Version
}));
// filter based of mapping criteria
MemoryData <T> retval = newCacheItems.FirstOrDefault(lambda.Compile());
return(retval);
}
}
