What is the difference between a saga, a process manager and a document-based approach?

Question

What I understand is that all three concepts are related to long-running transactions.

A process manager is, to my understanding, a finite state machine which simply

Answer 1

Saga has no state while Process Manager has.

Another difference - Process Manager is a state machine, Saga is not.

Saga does not have

• state machine state
• data state (some persisted data)

.. and Process Manager has

• state machine state
• data state (some persisted data)

Read more in my blog: http://blog.devarchive.net/2015/11/saga-vs-process-manager.html