SWF starts communicating with actors from the start to the completion of a workflow and allocates respective activities and decision tasks to these actors. Figure 14.3 describes the life cycle of a customer order-processing workflow:
Figure 14.3: Workflow execution lifecycle
Here are the steps shown in Figure 14.3:
- The workflow starter starts the workflow execution by calling the StartWorkflowExecution action with order information.
- SWF gets the request to start the workflow execution, sends it back with a WorkflowExectuionStarted event, and schedules a decision task raising a DecisionTaskScheduled event.
- A process configured as a decider in the workflow, polls for a decision task using the PollForDecisionTask action, and receives the decision task from SWF along with the task history. The decider then uses coordination logic...