Parent Child jobs

[thoven87]

The need for parent child job

Say you are a retailer and sell products online:
We should be able to support the following flow

Order placed -> Payment processed -> Update inventory -> Ship -> Send Email.

One would need at least three jobs to complete the above workflow. The above could be accomplished with pub sub, but I think there are many more use cases where a batch flow is more natural.

How do we represent this flow in swift jobs?

Update Inventory Job
-> Process Shipping Job
-> Notification Job

In the upcoming user interface, the DAG can be represented as follow

Update Inventory Job  -> Process Shipping Job -> Notification Job

All three jobs can be scheduled run daily, hourly e.t.c and would be chained.