Adapter Resolver

Module loader based on adapter parameters.

Install

npm install @universal-packages/adapter-resolver

Usage

AdapterResolver class

Just instantiate the class and start resolving adapters.

import { AdapterResolver } from '@universal-packages/adapter-resolver'

const resolver = new AdapterResolver({ domain: 'token-registry', type: 'engine' })

const adapter = await resolver.resolve('redis')

console.log(adapter)

// > [class RedisEngine]

Constructor constructor

new AdapterResolver(options: AdapterResolverOptions)

Creates a new AdapterResolver instance.

Options

Adapters need to follow the convention in order to be found. domain and name are use to infer the package name and type is used to infer the export name.

• domain String The domain for which the adapter will work for example if the adapter is redis and is meant to work with @universal-packages/token-registry you provide here token-registry.

• type String The package needs to export something in the format <name><type>, for example if the adapter is an "engine", you provide here engine and it will internally will come up with different case variations of the format to find the export ex: redisEngine, RedisEngine, redis_engine.

• internal Object optional An object which keys match an internal adapter provided by the root library.

  import { AdapterResolver } from '@universal-packages/adapter-resolver'
  
  const resolver = new AdapterResolver({
    domain: 'token-registry',
    type: 'engine',
    internal: { local: LocalAdapter }
  })
  
  const adapter = await resolver.resolve('local')
  
  console.log(adapter)
  
  // > [class LocalAdapter]

Instance Methods

resolve

resolver.resolve(name: string): Promise<A>

Tries to infer an installed module name based on the provided name and resolver options, imports it and infers the desired export based on name and options.

import { AdapterResolver } from '@universal-packages/adapter-resolver'

const resolver = new AdapterResolver({ domain: 'token-registry', type: 'engine' })

const adapter = await resolver.resolve('redis')

console.log(adapter)

// > [class RedisEngine]

gather

resolver.gather(): Promise<GatheredAdapters<A>>

Gather all the adapters of the configured type under the same domain.

import { AdapterResolver } from '@universal-packages/adapter-resolver'

const resolver = new AdapterResolver({ domain: 'token-registry', type: 'engine' })

const adapters = await resolver.gather()

console.log(adapters)

// > { redis: [class RedisEngine], local: [class LocalEngine] }

When using the internal option, internal adapters will be mixed with the gathered adapters:

import { AdapterResolver } from '@universal-packages/adapter-resolver'

const resolver = new AdapterResolver({
  domain: 'token-registry',
  type: 'engine',
  internal: { local: InternalAdapter }
})

const adapters = await resolver.gather()

console.log(adapters)

// > { local: [class InternalAdapter], redis: [class RedisEngine] }

Typescript

This library is developed in TypeScript and shipped fully typed.

Contributing

The development of this library happens in the open on GitHub, and we are grateful to the community for contributing bugfixes and improvements. Read below to learn how you can take part in improving this library.

• Code of Conduct
• Contributing Guide

License

MIT licensed.