Gateway iterating over a list

Q&A
1

I was wonder if someone could help me so i had a service task in a flow to query a database.  It oftentimes will have many rows but single column.

Testting it my output will loo like this

 

ArrayList<E> :[Merchant A, Merchant B, Merchant C]

 

In my gateway is there a design patter where i can evaluate Merchant A and do subsequent task.  Then comeback to the gateway and evaluate Merchant B and do subsequent step etc.

Appreciate

Sean

 

2

Thanks for the comment.  The only thing i could see is in this list example there is 3 items but in another run there could be 6 then later 4 etc.  Its dynamic.  I was wondering if there was a way to use the values from the list to iterate over the service task that is the subsequent task to the arm that sends an email.  In this example 3 emails sent in another run it may be 6 emails.

Thanks much

3

Hello

I hope I understand you situation correctly.

Have you tried using a Inclusive gateway. Each arm of the gateway can be configured to evaluate a certain condition.

So you can map 3 output arms. Each arm , you can check the arraylist to see if A, B or C is there or not, and each arm then would proceed towards individual Human tasks/Service tasks. The output from the 3 Tasks can be again added together using a Parallel gateway and used as a input for the Inclusive gateway.
Make sure to have a default arm and loop terminating conditions else it will be stuck in eternal loop.

 

Regards

4

This is the way.