protected IWorker SelectWorker(Expression <Func <TEntity, object> > predicate, out TEntity itemToProcess)
{
var chooseWorker = new Func <TKey, IWorker>(key =>
{
lock (new object())
{
if (_groupingKeyDictionary.ContainsKey(key))
{
return(Workers.ElementAt(_groupingKeyDictionary[key]));
}
var worker = base.SelectWorker();
_groupingKeyDictionary.Add(key, worker.WorkerId);
return(worker);
}
});
if (!(predicate.Body is NewExpression memberSelector))
{
throw new Exception($"Predicate is not valid");
}
itemToProcess = GetUnderlyingParameterValue(memberSelector);
var groupingKey = GetKey(predicate, itemToProcess);
return(chooseWorker(groupingKey));
}
internal Worker GetWorker(int index)
{
return(Workers.ElementAt(index));
}