Domain Modeling Made Functional

The Assembled Pipeline

We’ve seen the code in scattered fragments throughout this chapter. Let’s gather it all together and show how the complete pipeline would be assembled.

1. We put all the code that implements a particular workflow in the same module, named after the workflow (PlaceOrderWorkflow.fs, for example).
2. At the top of the file, we put the type definitions.
3. After that, we put the implementations for each step.
4. At the very bottom, we assemble the steps into the main workflow function.

In order to save space, we’ll just show an outline of the file content. If you would like to see the complete file, all the code for this chapter is available in the code repository associated with this book.

First, then, the types:

Now the types of the workflow ...