2.17Your first integration orchestration

The whole flow becomes:

                    POST /customers
                          │
                          ↓
                  ┌────────────────┐
                  │ HTTP Listener  │
                  └───────┬────────┘
                          ↓
                  ┌────────────────┐
                  │ Validate input │
                  └───────┬────────┘
                          ↓
               vars.originalCustomer
                          │
                          ↓
                 Transform Account
                          │
                          ↓
                Salesforce Upsert
                      Account
                          │
                          ↓
              vars.salesforceAccountId
                          │
                          ↓
                 Transform Contact
                          │
                          ↓
                Salesforce Upsert
                      Contact
                          │
                          ↓
                  Build response
                          │
                          ↓
                       HTTP

This is orchestration.

Mule isn't merely transferring data.

It's coordinating business operations.