Flow and Subflow

• Reusability and reduced development time.

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• Consistency and increased maintainability of your similar flows (consider a subflow as analogous to a programming macro, or to inline code that is written once but used in many places).

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• Flexibility to tailor a subflow to a specific context (for example, by updating the output queue or data source information).

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• Asynchronous subflow can perform time-consuming tasks, such as writing data to an external database or emailing a message, without stalling main flow, the flow that triggered its execution.

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Types of Subflow

1. Synchronous

A subflow run synchronously (relative to the flow that triggered its execution) and always inherits both the processing strategy and exception strategy employed by the triggering flow. While a subflow is running, processing on the triggering flow pauses, then resumes only after the subflow completes its processing and hands the message back to the triggering flow.

Case 1: Standard synchronous subflow

Case 2: Using Subflow multiple times in a flow.

Case 3: Same subflow used by multiple flows

2. Asynchronous

An asynchronous flow run simultaneously and asynchronously in parallel to the flow that triggered its execution. When a flow trigger an asynchronous flow, thus triggering its execution, it simultaneously flow to the next activity processor in its own flow. Thus, the two flows – triggering and triggered – execute simultaneously and independently, each finishing on its own. This type of flow does not inherit processing or exception strategies from the triggering flow.

Case 1: Standard asynchronous subflow

Case 2: Same subflow used by multiple flows