Our great sponsors
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booster
Software development framework specialized in building highly scalable microservices with CQRS and Event-Sourcing. It uses the semantics of the code to build a fully working GraphQL API that supports real-time subscriptions. (by boostercloud)
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SurveyJS
Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App. With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js.
The code for the UpdatePhoneNumber and UpdateAddress commands, as well as for the PhoneNumberChanged, and AddressChanged events follow a similar pattern, so I'm going to skip them here, but you can take a look at them in the GitHub repo.
I encourage you all to try out Booster and modeling your systems around events. Learn more by visiting Booster's website, GitHub repo, or join the conversation on the Booster Discord server!