Is specific scenario achievable with sequential-workflow-designer

[akiryazov]

Hello!

First I'd like to start that I am not logging an actual issue but rather asking if a specific case is feasible with the library.

I am looking for a new workflow library for my project and encountered sequential-workflow-designer. I liked the design and the functionality which provides but while trying to create PoC using project data, I couldn't do it. I was looking in the documentation and source code as well but didn't find a way.

This is the graph that I have. As you can see the start node has 4 child nodes. If we check reader and user data nodes, we can see that both of them are connected to a single child agg having few more children. We can consider this beign a sub-workflow.

While experimenting with sequential-workflow-designer, I tried 2 approaches. One of them was with using if statements, the other was parallels. However, we can see that both approaches need to connect to one and same child.

Did I miss something or just the library doesn't support such functionality yet? Many thanks in advance!

[b4rtaz]

Hello @akiryazov,

the flow from the first image could be represented in this way:

I introduced two if conditions that create branches. The else part solves the problem of two flows that are expected to merge.

Basically, this problem would be solved in the same way in some programming languages.

if (condition1) {
   t1();
   readerIteration();
} else if (condition2) {
  userData2();
  t2();
} else {
   if (condition3) {
      userData();
   } else {
      reader();
   }
   agg();
   w1();
   gate();
   nw();
}

[akiryazov]

Many thanks for the answer, @b4rtaz!

Is it correct that this can be done only through code and not through the editor? Because I am trying to achieve it with Drag & Drop and I manage to have only 2 if conditions. Sorry if it's there and I just can't find a way :)

[b4rtaz]

The flow from my screenshot I did in this demo. I used Parallel and Write steps. After I placed the Parallel step I added expected branches by clicking Add branch in the step editor, then I deleted default branches. But this is only an example how you can create dynamically branches in the designer.

Here (the Branches step) is an example with a better experience for creating dynamic branches.

[akiryazov]

@b4rtaz , many thanks again for the quick response!

One last question - is dynamic branching functionality available only in the pro version of the editor?

[b4rtaz]

You can implement dynamic branches manually as you can see in this example. If you want to use Sequential Workflow Editor then you need the branches additional editor or the depended value model (both available only in the pro version). You can check the pricing.