cqrs

- cqrs is a library for nodejs oriented to microservices,
this library is made to work with nestjs

- Example code

Getting Started

To get started, let's install the package through npm:

``
npm i @addapptables/cqrs --S
`

How to use

- Create commands
`typescript
import { Command } from '@addapptables/cqrs';

export class ClassCommandModel implements ICommandDto, IEventDto {
id: string;
}

export class CreateUserCommand extends Command {
public readonly action = 'action';
public readonly context = 'context';

constructor(public readonly data: ClassCommandModel) { super(data); }
}
`

- Create command handlers
`typescript
import { ICommandHandler, CommandHandler, ICommand } from '@addapptables/cqrs';

@CommandHandler({ context: 'context', action: 'action' })
export class CommandHandler implements ICommandHandler {

handle = async (command: ICommand): Promise => {
// Save in event store
}

}
`

- Create event handlers
`typescript
import { IEventHandler, IEvent, EventHandler } from '@addapptables/cqrs';

@EventHandler({ context: 'context', action: 'action' })
export class ActionHandler implements IEventHandler {

handle = async ({ data }: IEvent): Promise => {
try {
console.log(data);
} catch (error) {
console.log('error', error);
}
}

}
``