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Basic: Call backend code

This sample shows how Code nodes can call classes and methods from the host application.

Choose this when​

Use this sample when you want workflow code to reuse backend services, helper classes, or application logic instead of duplicating it inside the workflow.

What it demonstrates​

  • Reading a numeric input from context.
  • Instantiating a backend class from a Code node.
  • Calling an async static backend method.
  • Writing multiple output values under output.

How it works​

The workflow starts with an optional number input defaulting to 42. One Code node creates a CodeExample instance and writes output.doubled. The next Code node awaits CodeExample.SlowDoubled and writes output.slowDoubled before the workflow ends.

Setup notes​

This sample depends on the 'DemoServer' host code that defines CodeExample. In your own host application, use the same pattern with classes or services available to your workflow code.