nestjsx/nest-emitter

Strongly 💪🏼 Typed Eventemitter Module For Nestjs Framework 🦁

A set of opinionated NestJS extensions and modules

Packages

• @nestjsx/common - A set of NestJs decorators, interfaces and configuration for application modules bootstraping.

Tests

npm run test

nest-emitter's Issues

Problem while using nest-emitter in E2E tests

Hello,

Can someone provide a way to .overrideProvider / .useValue while usng nest-emitter.
I got an error in e2e tests when testing service that has @InjectEventEmitter() inside.

This is the error:

Nest can't resolve dependencies of the ConfigurationService (ConfigurationEntityRepository, ?, Logger). Please make sure that the argument __event_emitter__ at index [1] is available in the ConfigurationModule context.

Avoid repetition event emitter module import

Why event emitter need to be imported each events.

The event emitter module already imported on app.module.ts (import { EventEmitter } from 'event'), then why i should import it back to (eg: payment.event.ts)

Is this strong typed case ?

Release v1.1.1

The latest master branch has a fix for the types that I would love to have for my project - unfortunately I can't just cleanly import this module from GitHub because of TypeScript.

@shekohex could you push a new version to npm? Would be very appreciated. :)

Fail when I execute prestart:prod

npm run prestart:prod

[email protected] prestart:prod /home/develop/backend
tsc

node_modules/nest-emitter/strong-emitter.d.ts:17:82 - error TS1110: Type expected.

17 declare type ListenerType = [T] extends [(...args: infer U) => any] ? U : [T, ...any[]];

Testing

Hello, how i can import this emitter provider on unit test?
Nest can't resolve dependencies of the GameController (?, GameService). Please make sure that the argument at index [0] is available in the current context.
On first argument i have:
@InjectEventEmitter() private readonly gameEmitter: GameEventEmitter

May be i can do this using EVENT_EMITTER_TOKEN for custom provider, it would be nice then to export it.

It works for me:

import { EventEmitter } from 'events';
const EVENT_EMITTER_TOKEN = '__event_emitter__';

{
    provide: EVENT_EMITTER_TOKEN,
    useValue: EventEmitter,
}

node_modules/nest-emitter/nest-emitter.module.d.ts:3:35 - error TS2694: Namespace 'NodeJS' has no exported member 'Events'. 3 declare type NestEmitter = NodeJS.Events;

How to use with Microservices?

Hi,

thanks for the great package!

I would love to use it in combination with the Microservices Event Pattern. Do you see a way how this can be done?

Best
Philipp

how to waiting async listeners done?

Please release version 1.1.0

#6 #4

NestJS v6.0.0 update

Could you please update dependencies to nestjs version 6.0.0? Thank you.

For the .on, do we need to specify that it's async?

    this.emitter.on('notification', async msg => await this.onNotification(msg));

Can I just do:

    this.emitter.on('notification', this.onNotification);

I'm not sure what benefit the async offers?

How to inject in a custom provider?

Hi,
I would like to know how can I inject the emitter in a custom provider

Thank you

Please release new version to correctly work with NodeJS v12

After upgrade to NodeJS v12, nest-emitter no longer buildable.

node_modules/nest-emitter/nest-emitter.module.d.ts(3,35): error TS2694: Namespace 'NodeJS' has no exported member 'Events'.

#13 fixed this issue and already merged.

Please release a new version.

Definition issues (Namespace 'NodeJS' has no exported member 'Events')

Hi, i have a Definition issues.
And i'm using nest v6

node_modules/nest-emitter/nest-emitter.module.d.ts:3:35 - error TS2694: Namespace 'NodeJS' has no exported member 'Events'.

3 declare type NestEmitter = NodeJS.Events

import {EventEmitter} from 'events';

/// <reference types="node" />
import { DynamicModule } from '@nestjs/common';
declare type NestEmitter = NodeJS.Events;
export declare class NestEmitterModule {
    static forRoot(emitter: NestEmitter): DynamicModule;
}
export {};

So i'm replace that. it works fine.

import {EventEmitter} from 'events';

/// <reference types="node" />
import { DynamicModule } from '@nestjs/common';
declare type NestEmitter = EventEmitter;
export declare class NestEmitterModule {
    static forRoot(emitter: NestEmitter): DynamicModule;
}
export {};

Inject multiple event emitters

Is there a way to inject multiple event emitters in a single controller?

emit events from outside nestjs classes

I create a service function outside of nest for more simple unit testing. How can I emit events from this function instead of a nestjs class?

Build error after upgrading node to 12.12.0 version

Hello I get following error when builiding project

node_modules/nest-emitter/nest-emitter.module.d.ts:3:35 - error TS2694: Namespace 'NodeJS' has no exported member 'Events'.

declare type NestEmitter = NodeJS.Events;

Unable to add NestEmitterModule in app.module on NestJS v6.0.0

It could be the same issue with NestJS v6.0.0 update, but here is error message I got when start nestjs app.

[Nest] 77452 - 04/04/2019, 3:33 PM [NestFactory] Starting Nest application...
[Nest] 77452 - 04/04/2019, 3:33 PM [ExceptionHandler] Nest cannot export a provider/module that is not a part of the currently processed module (NestEmitterModule). Please verify whether each exported unit is available in this particular context. +17ms
Error: Nest cannot export a provider/module that is not a part of the currently processed module (NestEmitterModule). Please verify whether each exported unit is available in this particular context.
at Module.validateExportedProvider (/opt/vrs/eslnest/node_modules/@nestjs/core/injector/module.js:224:19)
at Module.addCustomExportedProvider (/opt/vrs/eslnest/node_modules/@nestjs/core/injector/module.js:208:43)
at Module.addExportedProvider (/opt/vrs/eslnest/node_modules/@nestjs/core/injector/module.js:194:25)
at NestContainer.addExportedProvider (/opt/vrs/eslnest/node_modules/@nestjs/core/injector/container.js:112:16)
at DependenciesScanner.insertExportedProvider (/opt/vrs/eslnest/node_modules/@nestjs/core/scanner.js:170:24)
at exports.forEach.exportedProvider (/opt/vrs/eslnest/node_modules/@nestjs/core/scanner.js:101:50)
at Array.forEach ()
at DependenciesScanner.reflectExports (/opt/vrs/eslnest/node_modules/@nestjs/core/scanner.js:101:17)
at DependenciesScanner.scanModulesForDependencies (/opt/vrs/eslnest/node_modules/@nestjs/core/scanner.js:54:18)
at process._tickCallback (internal/process/next_tick.js:68:7)
1: 0x8dc1c0 node::Abort() [node]
2: 0x96e1a9 [node]
3: 0xb5e7cf [node]
4: 0xb5f339 v8::internal::Builtin_HandleApiCall(int, v8::internal::Object**, v8::internal::Isolate*) [node]
5: 0x2567b1cdbe1d
Aborted

Please refer to this link nestjs/nest#1010