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You use a Flow activity to provide a container where enclosed activities can execute concurrently. Activities within a Flow start at the same time as the Flow and the Flow completes when the activities are complete. Basically, a Flow activity, through links, provides concurrency and sychronization.

For example, if you wanted a process that made sure you had approval from two parties before a transfer of funds activity took place, you could have two Invoke activites run concurrently when the Flow starts. If both of these Invokes require a response, the Flow completes when both parties respond. Then, the other Invoke, transferFunds, executes.

You can use links within a Flow to define dependencies between activities and control the order in which they execute. See Using Links for more information.

To add a Flow:

  1. From the Palette, drag a Flow to the BPEL Editor.
  2. Drag an activity, such as Receive, inside the Flow.

    You can continue to drag other activities into the Flow that you want to execute concurrently.

  3. Define the properties for each activity in the Flow.

More information