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Create new services

Learn about creating Controller Services in Cloudera Data Flow Flow Designer.

Services are extension points that provide information for use by other components, such as processors or other controller services. The idea is that, rather than configuring this information in every processor that might need it, the service provides it for any processor to use as needed.

You will use the services you create now to configure the behavior of several processors you will add to your flow as you are building it.

  1. Go to Flow Options > Services.


  2. Click the Add Service button.
    The Add Service page opens.


  3. In the Search field, filter for CSVReader.
  4. Provide the Service Name as CSVReader_Recent_Changes.
  5. Click the Add button.
    You do not need to configure the CSVReader_Recent_Changes service. You can leave all properties with their default values.
  6. Click the Add Service button again to create another service.
  7. In the Search field, filter for CSVRecordSetWriter.
  8. Provide the Service Name as CSVRecordSetWriter_Recent_Changes.
  9. Click the Add button.
    You do not need to configure the CSVRecordSetWriter_Recent_Changes service. You can leave all properties with their default values.
  10. Select the AvroReader_Recent_Changes service and check the list of Referencing Components in the Service Details pane on the right.
    Make a note of the listed components, because that is where you will need to replace AvroReader_Recent_Changes with the CSVReader_Recent_Changes service.
  11. Select the AvroWriter_Recent_Changes service and check the list of Referencing Components in the Service Details pane on the right.
    Make a note of the listed components, because that is where you will need to replace AvroWriter_Recent_Changes with the CSVRecordSetWriter_Recent_Changes service.
  12. Click the Back To Flow Designer to return to the flow design Canvas.
After creating the necessary services, you can start customizing your flow.