microservice-support-toolkit/lib/core/spring-cloud-config.js

A global module with commons utilities for microservice support

const client = require('cloud-config-client');
const YAML = require('yaml');
const path = require('path');
const fs = require('fs');
const logger = require('./logger');

let APPNAME = 'microservice';
let cloudConfigUri = null;
let config = null;

const init = () => {
  try {
    logger.info('Load bootstrap configs...');

    const filePath = path.join(__dirname, '../../../../resources/bootstrap.yml');
    const file = fs.readFileSync(filePath, 'utf8');
    const yamlFile = YAML.parse(file);

    cloudConfigUri = yamlFile.spring.cloud.config.uri;
    APPNAME = yamlFile.app.name;

  } catch (err) {
    logger.error('/resources/bootstrap.yml NOT FOUND !!!!', err);
  }
};

init();

const load = async () => {
  await fetch();
  return config;
};

const fetch = async () => {
  logger.info('Spring Cloud Config fetch...');
  try {
    config = await client.load({ endpoint: cloudConfigUri, application: APPNAME });
  }
  catch (err) {
    logger.error('Spring Cloud Config fetch error', err);
    config = null;
  }
  return config;
};

const get = property => (property ? config._properties[property] : config);

module.exports = {
  getAppName: () => APPNAME,
  load,
  fetch,
  get
};