DPC2019: DDD, CQRS, Hexagonal, Onion,... Putting it together - Jeroen Keppens

Discover how to combine DDD, CQRS, hexagonal architecture, and other patterns to create a maintainable and scalable system, and learn how to decouple components for greater flexibility and reusability.

Key takeaways

DDD, CQRS, hexagonal architecture, and other patterns can be used together to create a maintainable and scalable system.
Hexagonal architecture emphasizes the use of ports and adapters to decouple the application from its infrastructure.
CQRS is a design pattern that separates the application into two parts: the command handler and the query handler.
Events can be used to notify other parts of the system of changes and to provide a way to decouple components.
Domain-driven design (DDD) is a software development process that emphasizes the use of the business domain language in software design.
Bounded context is a technique used in DDD to divide the application into smaller, independent pieces.
Ports and adapters can be used to create a layer of abstraction between the application and its infrastructure.
Dependency injection can be used to create a loose coupling between components.
The application layer can be divided into smaller, independent parts using the command handler and query handler patterns.
The domain layer can be used to encapsulate the application’s business logic.
The infrastructure layer can be used to encapsulate the application’s infrastructure concerns.
The presentation layer can be used to encapsulate the application’s presentation concerns.
The domain service can be used to encapsulate the application’s business logic and make it reusable.
The use of interfaces and abstract classes can help to decouple components and make them more flexible.
The use of messaging can help to decouple components and provide a way to communicate between them.
The use of events can help to provide a way to communicate between components and provide a way to notify other parts of the system of changes.
The use of a command bus can help to provide a way to handle commands in a decoupled manner.
The use of a query bus can help to provide a way to handle queries in a decoupled manner.
The application can be divided into smaller, independent parts using bounded context and ports and adapters.
The use of dependency injection can help to decouple components and make them more flexible.
The use of interfaces and abstract classes can help to decouple components and make them more flexible.
The use of messaging can help to decouple components and provide a way to communicate between them.
The use of events can help to provide a way to communicate between components and provide a way to notify other parts of the system of changes.
The use of a command bus can help to provide a way to handle commands in a decoupled manner.
The use of a query bus can help to provide a way to handle queries in a decoupled manner.

DPC2019: DDD, CQRS, Hexagonal, Onion,... Putting it together - Jeroen Keppens

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