Goki Dev Tools

Tools and common codes that we may use in our microservices are provided in this module.

Table of Contents

• Installation
• Usage
• Documentation
• Support
• Contributing

Installation

Using npm command:

npm i --save @gokiteam/dev-tools

Usage

Container

There's a Container entity that can be configured to create singleton instances of provided helpers. You can declare and instantiate it once and use that instance everywhere in your project. You can also import and instantiate one helper on demand if needed, but it's recommended to use Container entity to have a cleaner implementation and prevent redundant code.

Each config param is optional and can be defined if needed.

const container = new Container ({
  logger: WinstonLogger,
  config: {
    redis: {/* config here */},
    rollBar: {/* config here */},
    errorLogger: {/* config here */},
    lockProvider: {/* config here */},
    endpoints: {/* config here */},
    healthCheck: {/* config here */},
  }
})

Redis

This component uses ioredis and creates a simple interface for redis.

Endpoints

Endpoints is a component that represents how other services can communicate with this service. It includes all gRPC and REST APIs and also all messaging consumers.

Usage

• Registering an endpoint:

// batch
container.Endpoints.batchRegister([
  {
    group: 'group.nestedGroup',
    name: 'endpointName',
    schema: JoiToSwagger(JoiSchema),
    isPublic: true,
    responses: []
  },
  {
    group: 'group.nestedGroup',
    name: 'endpointName',
    schema: JoiToSwagger(JoiSchema),
    isPublic: true,
    responses: []
  }
])

// single
container.Endpoints.register({
  group: 'group.nestedGroup',
  name: 'endpointName',
  schema: JoiToSwagger(JoiSchema),
  isPublic: true,
  responses: []
})

• Getting the endpoints:

const endpoints = container.Endpoints.list()

Error Logger

Logs the error appropriately and if RollBar is enabled, forwards the data to it too.

Usage

container.ErrorLogger.log(error, 'message', { /* any meta data */ })

Health Check

This component is responsible for preparing the health status of the service. Don't forget to register new components to the Health Check component to be checked during calls.

Usage:

• Registering a new item:

container.HealthCheck.register({
  group: 'group.nestedGroup',
  name: 'TestComponent',
  method: async () => {
    // async method to prepare the item's health
    return {}
  }
})

• Checking the status:

const status = await container.HealthCheck.check()

Lock Provider

It creates an interface for locking and unlocking resources with RedLock.

Usage

const lock = await container.LockProvider.lock(`resource`)
// operations...
lock.unlock()

Utils

There are some utils in this module that can be imported and used.

Joi To Swagger

Converts Joi Schema to swagger object.

Usage

const swaggerSchema = Utils.JoiToSwagger(joiSchema)

Object Describer

This component creates a swagger schema from one or several connected models. This component can be used to describe the response of APIs.

Usage

const output = new Utils.ObjectDescriber({ schema: User, mask: 'id,firstName,lastName,email'})
  .extend({ key: 'ads', objectModel: { schema: Ad, mask: 'id,category' }, array: true })
  .extend({ key: 'likes', objectModel: { schema: Like, mask: 'id,link' } })
  .join({ key: 'books', objectModel: { schema: Book, mask: 'id,title,author' } })
  .format()

The output will be something like this:

{
  id: { type: 'string' },
  firstName: { type: 'string' },
  lastName: { type: 'string' },
  email: { type: 'string' },
  ads: {
    type: 'array',
    items: {
      id: { type: 'string' },
      category: { type: 'string' }
    }
  },
  likes: {
    id: { type: 'string' },
    link: { type: 'string' }
  },
  books: {
    id: { type: 'string' },
    title: { type: 'string' },
    author: { type: 'string' }
  }
}

If you set the second parameter of the constructor to { array: true }, the output will be in the following format:

{
  type: 'array',
  items: <ITEMS-SCHEMA>
}

Promise Runner

This component receives several async functions and executes all of them and return the response.

Usage

const runner = new Utils.PromiseRunner()

runner.add(async () => {
  const output1 = await task1()
  // ...
})

runner.add(async () => {
  const output2 = await task2()
  // ...
})

await runner.run()

Documentation [NEED TO CREATE and UPDATE]

Link external documents in this section

• Document

Support

Please create a task for support.

Contributing

Please contribute using Git Convention. Create a branch, add commits, and create a merge request.