Skeleton

Skeleton is a boilerplate, RESTful generator based on Bima

Video

Check the video

Requirements

• Go 1.16 or above

• Git

• Taskfile

• gRPC Gateway

• RDBMS (by default only supports mysql and postgresql) or MongoDB for database storage

• Elasticsearch (Optional)

• RabbitMQ (Optional)

Basic Usage

• Download using skeleton using git by running git clone https://github.com/KejawenLab/skeleton.git

• Download dependencies using task clean command

• Copy env.example to .env

• Run using task run

• Open your browser and open http://localhost:7777/api/docs or port assigned by you

Connect to Database

I assume you use mysql as driver

• Create bima_skeleton database

• Add DB_DRIVER, DB_HOST, DB_PORT, DB_NAME, DB_USER, and DB_PASSWORD to .env

DB_DRIVER=mysql
DB_HOST=localhost
DB_PORT=3306
DB_NAME=bima_skeleton
DB_USER=root
DB_PASSWORD=aden

• Rerun your service using task run and you got new message Database configured using mysql driver like below

Create New Module

• Add API_VERSION=v1 to .env

• Run task module -- add <name>

• Follow the instructions

• Bima will generate todos folder as your module space, creating protos/todo.proto, register your module in configs/modules.yaml and register your Dependency Injection defined in dic.go into configs/provider.go

• Run task run and refresh your browser

Now you can test your module directly from swagger.

Cache Get By ID Result

By default, get by ID (single) result is cached by Bima and invalidate using PUT or DELETE when ID matches. By default, cache lifetime is 0 (no cache), you can easly adjust by adding CACHE_LIFETIME to your .env

CACHE_LIFETIME=1020

Register Request Filter

Try to call /api/v1/todos?fields=task&values=xxx and do not effect like below

Because by default skeleton doesn't provide filter. To apply request filter, you need to register your own filter or just use filter that provided by bima.

First, i assume you are use mysql or postgresql as driver, you need to add code below into your todos/dic.go

// import "github.com/KejawenLab/bima/v4/listeners/paginations"
{
    Name:  "bima:listener:filter:gorm",
    Scope: bima.Application,
    Build: (*paginations.GormFilter)(nil),
},

We use Dingo to manage dependencies, you can refer to dedicated documentation to learn about Dependency Injectin using Dingo. Then you need to register the bima:listener:filter:gorm to your configs/listeners.yaml

listeners:
    - filter:gorm # `bima:listener:` prefix is reserved by skeleton 

Now, you can rerun using task run and try /api/v1/todos?fields=task&values=xxx and then the result like below

You can easy to create your own filter by implement Listener interface

Listener interface {
    Handle(event interface{}) interface{}
    Listen() string
    Priority() int
}

The available events are below

PaginationEvent   = Event("pagination")
BeforeCreateEvent = Event("before_create")
BeforeUpdateEvent = Event("before_update")
BeforeDeleteEvent = Event("before_delete")
AfterCreateEvent  = Event("after_create")
AfterUpdateEvent  = Event("after_update")
AfterDeleteEvent  = Event("after_delete")

You can refer default listeners in listeners for example

Your first middleware

When you call /api/v1/todos you get response header like below

For example, you want to add X-Middleware to your response header, first step, create file middleware.go in your todos folder and paste codes below

package todos

import (
	"net/http"
)

type Middleware struct {
}

func (a *Middleware) Attach(_ *http.Request, response http.ResponseWriter) bool {
	response.Header().Add("X-Middleware", "My first middleware")

	return false
}

func (a *Middleware) Priority() int {
	return 0
}

And then, register your middleware into todos/dic.go

{
    Name:  "bima:middleware:todo",
    Scope: bima.Application,
    Build: (*Middleware)(nil),
},

Last, register your middleware to configs/middlewares.yaml

middlewares:
    - todo

Now, you can rerun using task run and try /api/v1/todos and then the result like below

Very easy, right? You can create anything by implement Middleware interface below

Middleware interface {
    Attach(request *http.Request, response http.ResponseWriter) bool
    Priority() int
}

Add new route

For example, you want to add new page /api/v1/todos/hello/{name} that response Hello <name> string, first add route.go to your todos folder

package todos

import (
	"bytes"
	"net/http"

	"github.com/KejawenLab/bima/v4/middlewares"
	"google.golang.org/grpc"
)

type HelloWorld struct {
}

func (a *HelloWorld) Path() string {
	return "/api/v1/todos/hello/{name}"
}

func (a *HelloWorld) Method() string {
	return http.MethodGet
}

func (a *HelloWorld) SetClient(client *grpc.ClientConn) {}

func (a *HelloWorld) Middlewares() []middlewares.Middleware {
	return nil
}

func (a *HelloWorld) Handle(w http.ResponseWriter, r *http.Request, params map[string]string) {
	w.Write([]byte("Hello " + params["name"]))
}

And then, register your middleware into todos/dic.go

{
    Name:  "bima:route:hello",
    Scope: bima.Application,
    Build: (*HelloWorld)(nil),
},

Last, register your middleware to configs/routes.yaml

routes:
    - hello

Rerun using task run and open /api/v1/todos/hello/bima and then the result like below

Now, try to remove todo from configs/middlewares.yaml so your response header will be back like below

And then change your route.go to

func (a *HelloWorld) Middlewares() []middlewares.Middleware {
	return []middlewares.Middleware{&Middleware{}}
}

Rerun again and open /api/v1/todos/hello/bima and your middleware is there

But when you open /api/v1/todos or any page others, your middleware is not exists. Yes, your can also add middleware for specific route with easy.

Add new route to swagger

By default, your custom route is not automatically added to swagger, you need to add manually. Open todo.swagger.json in swaggers folder using Swagger Editor add this lines

"/api/v1/todos/hello/{name}": {
    "get": {
    "operationId": "Todos_Hello_World",
    "responses": {
        "200": {
        "description": "A successful response.",
            "schema": {
                "type": "string"
            }
        },
        "default": {
            "description": "An unexpected error response.",
            "schema": {
                "$ref": "#/definitions/rpcStatus"
            }
        }
    },
    "parameters": [
        {
            "name": "name",
            "in": "path",
            "required": true,
            "type": "string"
        }
    ],
    "tags": [
            "Todos"
        ]
    }
}

Rerun again and open /api/docs and your custom route is already there

Use MongoDB

By default, skeleton configured for RDBMS that defined in dics/container.go using bima:repository:gorm, you can just change to bima:repository:mongo when you want to change to MongoDB. You need to change DB_DRIVER, DB_HOST, DB_PORT, DB_NAME, DB_USER, and DB_PASSWORD values depend on your setting

DB_DRIVER=mongo
DB_HOST=localhost
DB_PORT=27017
DB_NAME=bima_skeleton
DB_USER=mongo
DB_PASSWORD=s3cr3t

Add Logrus Hook

For example, you want to add Elasticsearch Hook, just add code below to dics/container.go

{
    Name: "bima:logger:extension:elasticsearch",
    Scope: bima.Application,
    Build: func(client *elastic.Client) (*elogrus.ElasticHook, error) {
        return elogrus.NewAsyncElasticHook(client, "localhost", logrus.DebugLevel, "mylog")
    },
    Params: dingo.Params{
        "0": dingo.Service("bima:elasticsearch:client"),
    },
},

And then register your extension to configs/loggers.yaml

loggers:
    - elasticsearch

Don't forget to add ELASTICSEARCH_HOST and ELASTICSEARCH_PORT to your .env

Using Yaml or Json config

To run application using yaml or json config, you can run using task run -- <file>.<ext>

Remove module

To remove module, just run task module -- remove <name>

Tutorial

• Jwt Login

• Basic Auth

• Distributed Tracing (RequestID)

• Enable CORS

• Add Custom Action

• Sync data to Elasticsearch

• Use Elasticsearch paginator

• Use Pub/Sub to publish and consume message (AMQP)

• Convert Mux Middleware to Bima Middleware

• Create Your Own Database Driver

• Use MongoDB as Storage Driver

• Use Kafka in Message Broker

Middlewares

• Basic Auth

• Jwt Atuh

• RequestID

• CORS

• Helmet

• Rate Limiter