Pre- and post-processing of data flows

You can specify the activities that are executed before and after a data flow run. Use them to prepare your data flow run and perform certain actions when the run ends. Pre-activities run before assignments are created. Post-activities start at the end of the data flow regardless of whether the run finishes, fails, or stops. Both pre- and post-activities run only once and are associated with the data flow run.

To create pre- and post-activities do the following steps:

1. Create an instance of the Activity rule.
2. On the Pages & Classes tab, specify the following details:
   • Page name: For example, RunOptions
   • Class: For example, Data-Decision-DDF-RunOptions
3. Click the Steps tab and define a sequential set of instructions (steps) for the activity to execute.
   1.  In the first step, specify the following details:
      • Method: Page-new
      • Step page: RunOptions
   2. Click Add a step and specify the following details:
      • Method: Property-set
      • Step page: RunOptions
   3. Click the arrow to the left of the Property-set method to expand the method and specify its parameters.
      1. Specify a property in the PropertiesName column.
         • For a pre-activity, specify RunOptions.pyPreActivity.pyActivityName
         • For a post-activity, specify RunOptions.pyPostActivity.pyActivityName
      2. Specify a property value in the PropertiesValue column.
      3. Optional: Run an activity on all Pega Platform nodes that are configured as part of the Data Flow service:
         • For a pre-activity, set the .pyPreActiviy.pyRunOnAllNodes as True.
         • For a post-activity, set the .pyPostActivity.pyRunOnAllNodes as True.
   4. Click Add a step and specify the following details:
      • Method: DataFlow-Execute
      • Step page: RunOptions
   5. Click the arrow next to the DataFlow-Execute method to expand the method and specify details of a data flow that you want to run.
      1. Specify a name of the data flow.
      2. Select an operation that you want to use.
      3. Specify a Run ID of the data flow or Run Options page (RunOptions).
4. Click Save.
5. Optional: On the Data Flows landing page, view the available data flows.

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