2.8.1 • Published 6 months ago
@xlit/mediator v2.8.1
@xlit/mediator
Command and query mediator
Installation
npm i @xlit/mediator
Getting started
Define command handler with decorator.
import { commandHandler } from '@xlit/mediator';
class FooCommand {
kind = 'FooCommand';
}
@commandHandler('FooCommand')
class FooCommandHandler {
handle(cmd: FooCommand): Promise<void> {
// do something
}
}
Define query handler with decorator.
import { queryHandler } from '@xlit/mediator';
class BarQuery {
kind = 'BarQuery';
}
type BarDto = string;
@queryHandler('BarQuery')
class BarQueryHandler {
handle(query: BarQuery): Promise<BarDto> {
// do something
return Promise.resolve('barbar');
}
}
Send command and query
import { FooCommand } from './FooCommand.js';
import { BarQuery } from './BarQuery.js';
const mediator = Mediator.instance();
await mediator.send(new FooCommand()); // send command
const result = await mediator.send(new BarQuery()); // send query
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