tpl-dataflow

What I'm trying to accomplish is I have a action block with MaxDegreeOfParallelism = 4 . I want to create one local instance of a session object I have for each parallel path, So I want to total of 4 session objects. If this was threads I would creating something like: ThreadLocal<Session> sessionPerThread = new ThreadLocal<Session>(() => new Session()); I know blocks are not threads so I'm looking for something similar but for blocks. Any way to create this? This block is in a service and runs for months on end. During that time period tons of threads are used for each concurrent slot of the

This code never reaches the last line because the completion doesn't propagate from the saveBlock to the sendBlock. What am I doing wrong? var readGenerateBlock = new TransformBlock<int, int>(n => { Console.WriteLine("Read " + n); Thread.Sleep(15); return n; }); var groupingBlock = new BatchBlock<int>(10); var saveBlock = new TransformManyBlock<int[], int>(n => { Console.WriteLine("Saving {0} items [{1}; {2}]", n.Count(), n.First(), n.Last()); Thread.Sleep(150); return n; }); var sendBlock = new TransformBlock<int, int>(n => { Console.WriteLine("Sending {0}", n); Thread.Sleep(25); return n; },

Is there any better way to implement functions like aggregation within a TPL-Dataflow mesh than using a BatchBlock to buffer all items until completion, emit them as a collection and then use a transform block to do the actual aggregation? Similarly, is there any other way to do an inner/outer/left/right join of two datasets without using a BatchedJoinBlock to buffer all items of both datasources, emit them as a tuple of two collections and then do the actual join with a Transform block? No . There is no such mechanism out-of-the-box in TPL Dataflow , as aggregation and joining operations aren

I'm trying to wrap my head around "completion" in TPL Dataflow blocks. In particular, the TransformBlock doesn't seem to ever complete. Why? Sample program My code calculates the square of all integers from 1 to 1000. I used a BufferBlock and a TransformBlock for that. Later in my code, I await completion of the TransformBlock . The block never actually completes though, and I don't understand why. static void Main(string[] args) { var bufferBlock = new BufferBlock<int>(); var calculatorBlock = new TransformBlock<int, int>(i => { Console.WriteLine("Calculating {0}²", i); return (int)Math.Pow(i

There are 2 different official TPL Dataflow nuget package. I am confused to choose which one i should to use. As far as i understand System.Threading.Tasks.Dataflow version is tiny bit newer than other and it seems System.Threading.Tasks.Dataflow is targeted latest versions of .net. Anyone can explain differences between of those ? Microsoft.Tpl.Dataflow was first released as a component separate from the BCL as part of .net 4.5 - here is a blog post announcing the release System.Threading.Tasks.Dataflow as a separate package was created as part of the dotnet core release. This archived