Cerebraljs Service provider example, so we can inject cerebral provider into our application layer services, and use application layer services in cerebral application layer.

actions.js

import UserAccountService from './UserAccountService';

export function someAction({ services, path }) {
  let userAccountService = services.get('UserAccountService', UserAccountService);
  return userAccountService.getUser().then(( { user } ) => {
    return path.success({ user })
  }).catch(err => {
    return path.error({ error: err})
  })
}

ServiceProvider.js

import { Provider } from 'cerebral';

const services = {};

export default Provider({
  get(name, serviceModule) {
    if (typeof name !== 'string') {
     throw new TypeError("invalid name");
    }

    if (services.hasOwnProperty(name)) {
      return services[name];
    }

    if (!serviceModule || typeof serviceModule.create !== 'function') {
      throw new TypeError(`The service module must have a 'create' method`);
    }

    let service = serviceModule.create(this.context);
    services[name] = service;

    return service;
  },
});

store.js

import ServiceProvider from './ServiceProvider';

const ApiProvider = {};

export default {
  providers: {
    services: ServiceProvider,
    api: ApiProvider,
  }
}

UserAccountService.js

export default class UserAccountService {
  constructor({ apiProvider }) {
    this.api = apiProvider;
  }
  
  create({ api }) {
    return new UserAccountService({ apiProvider: api });
  }
  
  fetchUser() {
    return this.api.get('/user');
  }
}