NestCloud - ConsulConfig

Description

A NestCloud component for getting and watching configurations from consul kv.

中文文档

Installation

$ npm i --save @nestcloud/consul consul @nestcloud/consul-config

Quick Start

Import Module

import { Module } from '@nestjs/common';
import { ConsulModule } from '@nestcloud/consul';
import { ConsulConfigModule } from '@nestcloud/consul-config';
import { BootModule } from '@nestcloud/boot';
import { NEST_BOOT } from '@nestcloud/common';

@Module({
  imports: [
      ConsulModule.register({dependencies: [NEST_BOOT]}),
      BootModule.register(__dirname, 'bootstrap.yml'),
      ConsulConfigModule.register({dependencies: [NEST_BOOT]})
  ],
})
export class ApplicationModule {}

Configurations

consul:
  host: localhost
  port: 8500
  service: 
    id: null
    name: example-service
  config:
    key: config__${{ consul.service.name }}__${{ NODE_ENV }}

How to get remote configurations

In consul kv, the key is "config__example-service__development".

user:
  info:
    name: 'test'

Inject Config Client

import { Injectable } from '@nestjs/common';
import { InjectConfig, ConsulConfig } from '@nestcloud/consul-config';

@Injectable()
export class TestService {
  constructor(
      @InjectConfig() private readonly config: ConsulConfig
  ) {}

  getUserInfo() {
      const userInfo = this.config.get('user.info', {name: 'judi'});
      console.log(userInfo);
  }
}

Inject value

import { Injectable } from '@nestjs/common';
import { ConfigValue } from '@nestcloud/consul-config';

@Injectable()
export class TestService {
  @ConfigValue('user.info', {name: 'judi'})
  private readonly userInfo;

  getUserInfo() {
      return this.userInfo;
  }
}

API

class ConsulConfigModule

static register(options): DynamicModule

Register consul config module.

| field | type | description | | :--- | :--- | :--- | | options.dependencies | string[] | if you are using @nestcloud/boot module, please set [NEST_BOOT] | | options.retry | number | the max retry count when get configuration fail |

class ConsulConfig

get(path?: string, defaults?: any): any

Get configuration from consul kv.

| field | type | description | | :--- | :--- | :--- | | path | string | the path of the configuration | | defaults | any | default value if the specific configuration is not exist |

getKey(): string

Get the current key.

watch(path: string, callback: (configs: any) => void): void

Watch the configurations.

| field | type | description | | :--- | :--- | :--- | | callback | (configs) => void | callback function |

async set(path: string, value: any): void

Update configuration.

| field | type | description | | :--- | :--- | :--- | | path | string | the path of the configuration | | value | any | the configuration |

Decorators

ConfigValue(path?: string, defaultValue?: any): PropertyDecorator

Inject configuration to attribute. It will change realtime when the value changed in consul kv.

Stay in touch

• Author - NestCloud

License

NestCloud is MIT licensed.