deepbludev / deepblu

Typesafe libraries for advanced architectures in Node.js / Nest.js, using DDD, CQRS, Event Sourcing, Event-driven architectures and message queues

@deepblu/ddd

Lightweight Domain Driven Design (DDD) / CQRS / Event Sourcing Typescript library for Node.js

Domain Driven Design (DDD) / CQRS / Event Sourcing library for Typescript.

Domain Driven Design (DDD) is a software development methodology that focuses on the core logic of a software system. It is a way of thinking about software design that emphasizes the core domain and domain logic over technical infrastructure and implementation details.

Command/Query Responsibility Segregation (CQRS) is a pattern that separates read and write application services and models for a data store.

Event Sourcing (ES) is a pattern that stores all changes to application state as a sequence of events, which can then be used to reconstruct the current state of the domain models.

Patterns and practices of DDD / CQRS / ES implemented in this library:

• Value Object
• Entity
• Aggregate Root
• Domain Event
• Domain Service
• Repository
• Command Bus
• Command Handler
• Query Bus
• Query Handler
• Event Bus
• Event Handler

There are working examples in the apps/example folder.

@deepblu/ioc

Lightweight Dependency Injection / Inversion of Control library for Javascript/Typescript built on top of tysringe