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Service boundaries identification example in e-commerce

Second example of service boundaries identification (check the first one here)

Before delving in

What commerce looked like in good old days

A shop-window inside a shop
A cashier, accepting a payment for an order

And what e-commerce looks like now

Primary business-services in e-commerce
Sales and Warehouse sagas
Billing and Shipping services

On the data ownership thing

Where is a ubiquitous Product Catalog service?

Composite view, comprised of data from various services

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