How to batch only by non matching 'group'?

[suraj_j]

In my model there are 2 activities feeding to a batch activity. I want to batch tokens only when they are from different activities as the rate at which the feeding activities may generate tokens differ. Is there a way other than lists or synchronize? Using list and sync. will pose a problem as there are many such batching operations being done.

[JordanLJohnson · Accepted solution]

Perhaps the Join would be better than the Synchronize, as it will only release a single token. If you need to preserve labels from both tokens, use a Synchronize where both output connectors go into a Batch. The Batch won't need to group by anything; it can just batch tokens released by the Synchronize.