Grokking Microservices Design Patterns
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CQRS Pattern: An Example
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Let's consider a simple application that manages user profiles. In this application, you can create a new user (command), update their email (command), and view user details (query).

1. Command Model (Write Model)

  1. Command Class: Defines an action to be performed. For instance, CreateUserCommand with fields like userId, name, and email.
  2. Command Handler: Processes the commands. It would take CreateUserCommand, perform business logic, and persist the changes.
  3. Domain Model: Represents the state of the data (e.g., a User class). 4

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