config

Config Components for Golang

This module is a part of the Pip.Services polyglot microservices toolkit.

The Config module contains configuration component definitions that can be used to build applications and services.

The module contains the following packages:

• Auth - authentication credential stores
• Config - configuration readers and managers, whose main task is to deliver configuration parameters to the application from wherever they are being stored
• Connect - connection discovery and configuration services

Quick links:

• Configuration
• API Reference
• Change Log
• Get Help
• Contribute

Use

Get the package from the Github repository:

go get -u github.com/pip-services4/pip-services4-go/pip-services4-config-go@latest

Then you are ready to start using the Pip.Services patterns to augment your backend code.

For instance, here is how you can implement a component, that receives configuration, get assigned references, can be opened and closed using the patterns from this module.

package main

import (
	"context"

	"github.com/pip-services4/pip-services4-go/pip-services4-components-go/config"
	"github.com/pip-services4/pip-services4-go/pip-services4-components-go/refer"
	"github.com/pip-services4/pip-services4-go/pip-services4-config-go/auth"
	"github.com/pip-services4/pip-services4-go/pip-services4-config-go/connect"
)

func main() {
	// Using the component
	myComponent := NewMyComponent()

	myComponent.Configure(context.Background(), config.NewConfigParamsFromTuples(
		"connection.host", "localhost",
		"connection.port", 1234,
		"credential.username", "anonymous",
		"credential.password", "pass123",
	))

	err := myComponent.Open(context.Background())
}

type MyComponent struct {
	connectionResolver *connect.ConnectionResolver
	credentialResolver *auth.CredentialResolver
}

func NewMyComponent() *MyComponent {
	return &MyComponent{
		connectionResolver: connect.NewEmptyConnectionResolver(),
		credentialResolver: auth.NewEmptyCredentialResolver(),
	}
}

func (c *MyComponent) Configure(ctx context.Context, config *config.ConfigParams) {
	c.connectionResolver.Configure(ctx, config)
	c.credentialResolver.Configure(ctx, config)
}

func (c *MyComponent) SetReferences(ctx context.Context, references refer.IReferences) {
	c.connectionResolver.SetReferences(ctx, references)
	c.credentialResolver.SetReferences(ctx, references)
}

// ...

func (c *MyComponent) IsOpen() bool {
	panic("not implemented") // TODO: Implement
}

func (c *MyComponent) Open(ctx context.Context) error {
	connection, err := c.connectionResolver.Resolve(ctx)
	credential, err := c.credentialResolver.Lookup(ctx)

	host := connection.Host()
	port := connection.Port()
	user := credential.Username()
	pass := credential.Password()
}

func (c *MyComponent) Close(ctx context.Context) error {
	panic("not implemented") // TODO: Implement
}

Develop

For development you shall install the following prerequisites:

• Golang v1.20+
• Visual Studio Code or another IDE of your choice
• Docker
• Git

Run automated tests:

go test -v ./test/...

Generate API documentation:

./docgen.ps1

Before committing changes run dockerized test as:

./test.ps1
./clear.ps1

Contacts

The library is created and maintained by Sergey Seroukhov.

The documentation is written by Danyil Tretiakov and Levichev Dmitry.