public void ConnectNodeByJoin(TaskNode start, TaskNode end, int outNr)
{
if (end.StreamIn == null)
{
throw new InvalidOperationException("Use ConnectNodeByJoin only after connecting the main connection");
}
start.ConnectOutStream((IWritableQueue)end.StreamIn, outNr, end.InType);
}
/// <summary>
/// Add a node to the flow. Nodes may only be included once per flow
/// </summary>
/// <param name="newNode"></param>
public void AddNode(TaskNode newNode, Position position)
{
_nodes.Add(newNode);
if (String.IsNullOrEmpty(newNode.Name))
{
newNode.Name = "node " + _nodes.Count.ToString();
}
newNode.OwningFlow = this;
newNode.Position = position;
}
public QueueEntryIntercept(TaskNode sender, IWritableQueue queue)
{
_innerQueue = queue;
_innerTask = sender;
lock (_writersByQueue)
{
if (!_writersByQueue.ContainsKey(queue))
{
_writersByQueue[queue] = new List <TaskNode>();
}
_writersByQueue[queue].Add(sender);
}
}
/// <summary>
///
/// </summary>
/// <param name="publisher"></param>
/// <param name="reader"></param>
/// <param name="streamNumber"></param>
public BoundedBlockingQueue ConnectNodes(TaskNode publisher, TaskNode reader, int streamNumber, int queueSize)
{
if (!reader.InType.IsAssignableFrom(publisher.OutTypes[streamNumber]))
{
throw new InvalidOperationException(String.Format("The in-stream of the reader ({1}) cannot be assigned from the publisher of type ({0})", publisher.OutTypes[streamNumber].Name, reader.InType.Name));
}
Type bbOfT = typeof(BoundedBlockingQueue <>).MakeGenericType(new Type[] { reader.InType });
BoundedBlockingQueue stream = (BoundedBlockingQueue)Activator.CreateInstance(bbOfT, queueSize);
publisher.ConnectOutStream(stream, streamNumber, reader.InType);
reader.ConnectInStream(stream);
if (String.IsNullOrEmpty(stream.Name))
{
stream.Name = String.Format("from '{0}' to '{1}'", publisher.Name, reader.Name);
}
_streams.Add(stream);
stream.OwningFlow = this;
return(stream);
}
/// <summary>
/// Returns a task that passes on everything it receives, but only once. If the same value is
/// passed twice, only the first one is passed on.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <returns></returns>
public static TaskNode <T, T> GetUniqueFilter <T>()
{
Dictionary <T, bool> alreadySeen = new Dictionary <T, bool>();
TaskNode <T, T> result = new TaskNode <T, T>(
(T input, IWritableQueue <T> output) =>
{
lock (alreadySeen)
{
if (!alreadySeen.ContainsKey(input))
{
alreadySeen.Add(input, true);
output.Send(input);
}
}
}
);
return(result);
}
internal void OnError(TaskNode node, Exception exc, object item, ref bool stopProcessing)
{
if (Error != null)
{
ErrorEventArgs args = new ErrorEventArgs()
{
Error = exc, ProcessedItem = item, StopProcessing = stopProcessing, Node = node
};
Error(this, args);
stopProcessing = args.StopProcessing;
}
else
{
stopProcessing = true;
}
if (stopProcessing)
{
_stoppingException = exc;
}
}
public static TaskNode <T, T> GetSortingFilter <T>()
{
List <T> collect = new List <T>();
TaskNode <T, T> result = new TaskNode <T, T>(
(T input, IWritableQueue <T> output) =>
{
collect.Add(input);
}
);
result.AfterComplete +=
(IList <IWritableQueue> outputs) =>
{
collect.Sort();
foreach (var item in collect)
{
outputs[0].SendInner(item);
}
};
return(result);
}
public BoundedBlockingQueue ConnectNodes(TaskNode publisher, TaskNode reader, int streamNumber)
{
return(ConnectNodes(publisher, reader, streamNumber, DefaultStreamSize));
}
public void AddNode(TaskNode newNode)
{
AddNode(newNode, Position.Origin);
}
public QueueEntryOrderKeeper(TaskNode owner, IWritableQueue queue)
{
_innerQueue = queue;
_innerTask = owner;
}
