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@fullerstack/ngx-logger

v0.0.8

Published

A Logger Utility Library for Angular

Downloads

61

Readme

@fullerstack/ngx-logger

A simple logger module for Angular applications

status-image version-image coverage-image download-image

Overview

Description

Proper logging of events is one of the most important aspect of any proper software design and architecture. This is to toggle a flag and have a desired portion of the logic log their activities. This is a MUST during debugging sessions, or simply to report an error and send the log on production deployments.

@fullerstack/ngx-logger attempts to streamline the logging of your application, while promoting DRY DRY.

How to install

npm i @fullerstack/ngx-logger |OR| yarn add @fullerstack/ngx-logger

How to use

// In your environment{prod,staging}.ts

import {
  ApplicationConfig,
  TargetPlatform,
  HttpMethod,
} from '@fullerstack/ngx-config';

import { LogLevel } from '@fullerstack/ngx-logger';

export const environment: ApplicationConfig = {
  production: false,
  // one or more app specific field(s)
  logger: {
    // Log level, (default = none)
    // Anything above `info` will be logged, anything below will be skipped
    level: LogLevel.info,
  },
} as const;
// In your app.module.ts

import { ConfigModule } from '@fullerstack/ngx-config';
import { LoggerModule } from '@fullerstack/ngx-logger';
import { environment } from '../environments/environment';

@NgModule({
  declarations: [AppComponent],
  imports: [
    BrowserModule,
    ConfigModule.forRoot(environment),
    LoggerModule.forRoot(),
  ],
  bootstrap: [AppComponent],
})
export class AppModule {}
// In your app.component.ts or (some.service.ts)

import { Component } from '@angular/core';
import { ConfigService } from '@fullerstack/ngx-config';
import { LoggerService } from '@fullerstack/ngx-logger';

@Component({
  selector: 'fullerstack-root',
})
export class AppComponent {
  title = 'FullerStack';
  options: ApplicationConfig;

  constructor(readonly config: ConfigService, readonly log: LogService) {
    this.title = this.config.options.appName;

    this.log.critical('Logging critical');
    this.log.error('Logging error and above');
    this.log.warn('Logging warn and above');
    this.log.info('Logging info and above');
    this.log.debug('Logging debug and above');
    this.log.trace('Logging trace and above');
  }
}

Sample logs

ConfigService ready ...
2018-05-17T02:47:54.184Z [INFO] LogService ready ...
2018-05-17T02:47:54.188Z [INFO] GqlService ready ...
2018-05-17T02:47:54.375Z [INFO] I18nService ready ... (en)
2018-05-17T02:47:54.378Z [INFO] UixService ready ...
2018-05-17T02:47:54.379Z [INFO] JwtService ready ...
2018-05-17T02:47:54.384Z [INFO] Token expiry ... (21 seconds)
2018-05-17T02:47:54.388Z [INFO] AuthService ready ... (loggedIn)
2018-05-17T02:47:54.390Z [INFO] UsrService ready ...
2018-05-17T02:47:54.392Z [INFO] Web app starting now ...
2018-05-17T02:47:54.406Z [INFO] LayoutService ready ...

Note:

  1. @fullerstack/ngx-logger depends on @fullerstack/ngx-config for accessing the log level.
  2. You may want to set the log level to LogLevel.debug for development and LogLevel.warn for production.
  3. @fullerstack/ngx-logger should be imported at the root level of your application.
  4. To disable the logger, set the level to LogLevel.none, (default).

License

Released under a (MIT) license.

Version

X.Y.Z Version

`MAJOR` version -- making incompatible API changes
`MINOR` version -- adding functionality in a backwards-compatible manner
`PATCH` version -- making backwards-compatible bug fixes