Workflow States Reference

Workflow states define building blocks of the workflow execution instructions. They define the control flow logic instructions on what the workflow is supposed to do. Serverless Workflow defines the following Workflow States:

Name	Description	Consumes events?	Produces events?	Executes actions?	Handles errors/retries?	Allows parallel execution?	Makes data-based transitions?	Can be workflow start state?	Can be workflow end state?
Event	Define events that trigger action execution	yes	yes	yes	yes	yes	no	yes	yes
Operation	Execute one or more actions	no	yes	yes	yes	yes	no	yes	yes
Switch	Define data-based or event-based workflow transitions	no	yes	no	yes	no	yes	yes	no
Parallel	Causes parallel execution of branches (set of states)	no	yes	no	yes	yes	no	yes	yes
Inject	Inject static data into state data	no	yes	no	yes	no	no	yes	yes
ForEach	Parallel execution of states for each element of a data array	no	yes	no	yes	yes	no	yes	yes
Callback	Manual decision step. Executes a function and waits for callback event that indicates completion of the manual decision	yes	yes	yes	yes	no	no	yes	yes
UserTask	User task step. Used to assign a user task to an individual or groups of users	yes	yes	yes	yes	no	no	yes	yes