Here is an example README file for the microservice-com-temp project:

Microservice Commercial Template (microservice-com-temp)

A commercial-grade template for building a scalable and maintainable microservices architecture, using Golang, GraphQL, gRPC, Elasticsearch, and PostgreSQL.

Overview

The microservice-com-temp template provides a foundation for building a robust and efficient microservices-based system. This project includes:

• A set of Go (Golang) services that communicate with each other using gRPC
• A GraphQL API layer for exposing the service functionality to clients
• Elasticsearch integration for storing and querying data
• PostgreSQL database for persisting business logic

Features

Service Architecture

The template consists of multiple microservices, each responsible for a specific domain or capability. These services are designed to be loosely coupled, allowing for independent development, deployment, and scaling.

GraphQL API

A GraphQL API layer is provided on top of the service architecture, enabling clients to query and mutate data using a simple, intuitive interface.

gRPC Communication

Services communicate with each other using gRPC, which provides efficient, high-performance communication over HTTP/2 or TCP.

Elasticsearch Integration

Elasticsearch is used for storing and querying large amounts of data. This allows for fast search capabilities and scalable indexing.

PostgreSQL Database

A PostgreSQL database is provided to store business logic and persist service state.

Getting Started

To get started with the microservice-com-temp template, follow these steps:

1. Clone this repository: git clone https://github.com/your-username/microservice-com-temp.git
2. Install dependencies using Go modules: go mod init && go mod tidy
3. Run the services using Docker (recommended): docker-compose up -d
4. Use a GraphQL client library to interact with the API

GraphQL API Documentation

Overview

This GraphQL API provides endpoints for managing accounts, products, and orders. It supports CRUD operations on these entities.

Scalars

• Time: A scalar type representing a timestamp in ISO format (e.g., "2022-01-01T12:00:00Z").

Types

Account

Field	Type	Description
id	String!	Unique identifier for the account.
name	String!	Name of the account holder.
orders	[Order!]!	List of orders associated with this account.

Product

Field	Type	Description
id	String!	Unique identifier for the product.
name	String!	Name of the product.
description	String	Brief description of the product.
price	Float!	Price of the product in decimal format (e.g., 19.99).

Order

Field	Type	Description
id	String!	Unique identifier for the order.
createdAt	Time!	Timestamp when the order was created.
totalPrice	Float!	Total price of all products in this order.
products	[OrderedProduct!]!	List of ordered products associated with this order.

OrderedProduct

Field	Type	Description
id	String!	Unique identifier for the product being ordered.
name	String!	Name of the product being ordered.
description	String	Brief description of the product being ordered.
price	Float!	Price of the product in decimal format (e.g., 19.99).
quantity	Int!	Number of units of this product being ordered.

Inputs

PaginationInput

Field	Type	Description
skip	Int!	Skip a specified number of records before returning results.
take	Int!	Return only the first N records matching the query criteria.

AccountInput

Field	Type	Description
name	String!	Name of the account holder to create or update.

ProductInput

Field	Type	Description
name	String!	Name of the product to create or update.
description	String	Brief description of the product to create or update.
price	Float!	Price of the product in decimal format (e.g., 19.99).

OrderProductInput

Field	Type	Description
id	String!	Unique identifier for the product being ordered.
quantity	Int!	Number of units of this product to order.

OrderInput

Field	Type	Description
AccountId	String!	ID of the account associated with this order.
Products	[OrderProductInput!]!	List of ordered products for this order.

Mutations

• createAccount(account: AccountInput!): Creates a new account.
  • Input fields:
    • name (String!)
• createProduct(product: ProductInput!): Creates a new product.
  • Input fields:
    • name (String!)
    • description (String)
    • price (Float!)
• createOrder(order: OrderInput!): Creates a new order.
  • Input fields:
    • AccountId (String!)
    • Products ([OrderProductInput!]!)

Queries

• accounts(pagination: PaginationInput, id: String): [Account!]! : Retrieves accounts matching the specified criteria.
  • Optional input fields:
    • pagination (PaginationInput)
    • id (String)
• products(pagination: PaginationInput, query:String, id:String): [Product!]!: Retrieves products matching the specified criteria.
  • Optional input fields:
    • pagination (PaginationInput)
    • query (String)
    • id (String)

Example Queries

query {
  accounts(id: "12345") {
    name
    orders {
      createdAt
      totalPrice
      products {
        name
        quantity
      }
    }
  }

  products(query: "phone", pagination: { skip: 0, take: 10 }) {
    id
    name
    description
    price
  }
}

mutation {
  createAccount(account: { name: "John Doe" }) {
    id
    name
  }

  createProduct(product: { name: "iPhone", description: "Smartphone", price: 999.99 }) {
    id
    name
    description
    price
  }

  createOrder(order: { AccountId: "12345", Products: [{ id: "ABCDEF", quantity: 2 }] }) {
    id
    createdAt
    totalPrice
    products {
      name
      quantity
    }
  }
}

Contributing

We welcome contributions and feedback! If you'd like to contribute or report an issue, please follow these steps:

1. Fork this repository: git fork https://github.com/your-username/microservice-com-temp.git
2. Create a new branch for your changes
3. Make your changes and commit them
4. Open a pull request against the original repository

License

The microservice-com-temp template is licensed under the MIT License.

Acknowledgments

This project was inspired by various open-source projects, including:

• GraphQL-go: A Go implementation of GraphQL
• gRPC-go: The official Go implementation of gRPC
• Elasticsearch: A search and analytics engine

We appreciate their contributions to the development of these technologies!lopment of these technologies!