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Questions tagged [dataflow]

Dataflow programming is a programming paradigm in which computations are modeled through directed graphs: nodes are instructions and data flows through the connections between them.

Dataflow programming is a programming paradigm which models programs as directed graphs and calculation proceeds in a way similar to electrical circuits. More precisely:

  • nodes are instructions that takes one or more inputs, perform calculation on them and present the result(s) as output;
  • edges connects inputs and outputs of the instructions -- this way the output of an instruction can be fed directly to the input on another node to trigger another calculation;
  • data "travels" using the directed edges and triggers the instructions as they pass through the nodes.

Often dataflow programming languages are visual, the most prominent example being LabView.

Resources

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Logical Error, or misunderstanding of dataflow?

I'm developing a program and in it, a field from a database is pulled and according to its numerical value, will display one of three things in the GUI: "WARNING", "SEVERE" OR "CRITICAL". If it is between 0 and 100, it should display "WARNING" If…
exit_1
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Magento Advanced Dataflow profile not working

I could use some help from a magento expert. I've installed a fresh magento 1.7 installation in a subfolder of my old site, when the site is filled with all the products I'll copy it to the main folder. Now I want to import products using the…
Rick Sanchez C-131
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does ssis data flow commit when stopping mid process

I know I can test this out pretty easily but dont have access to SSIS right now does any one know if a ssis data flow commits the inserted records if it is stopped mid process. Thanks
user2129585
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JSF Page Navigation+Data flow

I am new to JSF and started learning and have worked on struts. Just wanted to understand how navigation works in JSF2.0. I understand in JSF2.0 navigation rules can be done in faces-config.xml. But I would like to understand how it works in real…
user2462959
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Conditional exception raising in a flow block

While using Akka's data-flow DSL, I have twice encountered a need to throw an exception inside future, conditionally. This is how I am doing it: flow { // ... if (someCond) shiftUnit(throw new SomeException) else Future().apply() //…
missingfaktor
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Using a scalar as a condition in an OLE DB data flow

I am having a problem with a data flow task in an ssis package i am trying to build. The objective of the package is to update tables situated in our local server using a connection to a distant server containing the source of the data, through a…
Ozokahn
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Using InputStream/OutputStream to handle data flows through modules

so now I have a bunch of modules. It's like a assembly line. There is data flowing through and each module does something about the data, or you can say the next module consumes the output that the previous module produces. Each module is sort of…
kakacii
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Which arrow should be there in dfd?

Not sure whether this is the right place to ask such a question. But I trust this has an answer over here. I am supposed to make a Data Flow Diagram and am confused whether is it right to use straight arrows instead of curved ones? Thanks
Shachi
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SSIS - DataFlow - Set a value for each row from a procedure stocked result

For a SSIS, i have to transfer data from a server to another but on the final destination, i have a column like ID. For determinate the new ID of each row, i have to execute a stored procedure on the final server. Is-it possible to do that in…
Guillaume
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Finding the number of days in a month

I am making a program to display the no. of days in the month provided by user. I am making this program at Data Flow level. As I am new to verilog, I don't know if we can use if/else conditions or case statement in data flow level. because using…
Alfred
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Dictionary of dataflow programming terms

I am developing a dataflow library for java, and I would like to give names to classes as it is customary to computer science. For example, I have following dataflow construct: it has 2 input queues, one for messages and one for actors (actors in…
Alexei Kaigorodov
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Hadoop data and control flow

I'm writing a Hadoop application but it seems that I have misinterpreted how exactly hadoop works. My Input files are tiles of a map, named according to the QuadTile principle. I need to subsample those, and stitch those together until I have a…
KarelV
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Measure fan-out and dataflow

Is there any tool that can measure the following 2 characteristics of C# Code (eventually also complete ASP.Net projects): fan-out: Number of external calls from a class. dataflow: the total number of outgoing and incoming data flow for the…
Dominik G
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Resharper Dataflow analysis

I'm using the TPL Dataflow library extensively, and really like the Used-By feature of R#. What would be nice is to look at the used by of a method which is the target of an ITargetBlock (Action block most likely) and return a list of the…
Superman
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Using Variable as expression in Derived column transformation SSIS

Essentially I a SSIS pkg with an Execute SQL statement that dynamically writes a REPLACE function based on some table values. (ie REPLACE(REPLACE(Col1,"*","",),"@@@","") ExecuteSQL result is put to variable @Cleanse In my Derived Column conversion…
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