micro/README.md

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# Go Micro [![License](https://img.shields.io/:license-apache-blue.svg)](https://opensource.org/licenses/Apache-2.0) [![Go.Dev reference](https://img.shields.io/badge/go.dev-reference-007d9c?logo=go&logoColor=white&style=flat-square)](https://pkg.go.dev/github.com/micro/go-micro?tab=doc) [![Travis CI](https://api.travis-ci.org/micro/go-micro.svg?branch=master)](https://travis-ci.org/micro/go-micro) [![Go Report Card](https://goreportcard.com/badge/micro/go-micro)](https://goreportcard.com/report/github.com/micro/go-micro) <a href="https://slack.micro.mu"><img src="https://img.shields.io/badge/join-us%20on%20slack-gray.svg?longCache=true&logo=slack&colorB=brightgreen" alt="Slack Widget"></a>
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Go Micro is a framework for distributed systems development.
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## Overview
Go Micro provides the core requirements for distributed systems development including RPC and Event driven communication.
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The **Micro** philosophy is sane defaults with a pluggable architecture. We provide defaults to get you started quickly
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but everything can be easily swapped out.
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<img src="https://micro.mu/docs/images/go-micro.svg" />
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Plugins are available at [github.com/micro/go-plugins](https://github.com/micro/go-plugins).
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Follow us on [Twitter](https://twitter.com/microhq) or join the [Community](https://slack.micro.mu).
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## Features
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Go Micro abstracts away the details of distributed systems. Here are the main features.
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- **Service Discovery** - Automatic service registration and name resolution. Service discovery is at the core of micro service
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development. When service A needs to speak to service B it needs the location of that service. The default discovery mechanism is
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multicast DNS (mdns), a zeroconf system.
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- **Load Balancing** - Client side load balancing built on service discovery. Once we have the addresses of any number of instances
of a service we now need a way to decide which node to route to. We use random hashed load balancing to provide even distribution
across the services and retry a different node if there's a problem.
- **Message Encoding** - Dynamic message encoding based on content-type. The client and server will use codecs along with content-type
to seamlessly encode and decode Go types for you. Any variety of messages could be encoded and sent from different clients. The client
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and server handle this by default. This includes protobuf and json by default.
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- **Request/Response** - RPC based request/response with support for bidirectional streaming. We provide an abstraction for synchronous
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communication. A request made to a service will be automatically resolved, load balanced, dialled and streamed. The default
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transport is [gRPC](https://grpc.io/).
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- **Async Messaging** - PubSub is built in as a first class citizen for asynchronous communication and event driven architectures.
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Event notifications are a core pattern in micro service development. The default messaging system is a HTTP event message broker.
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- **Pluggable Interfaces** - Go Micro makes use of Go interfaces for each distributed system abstraction. Because of this these interfaces
are pluggable and allows Go Micro to be runtime agnostic. You can plugin any underlying technology. Find plugins in
[github.com/micro/go-plugins](https://github.com/micro/go-plugins).
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## Getting Started
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To make use of Go Micro
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```golang
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import "github.com/micro/go-micro/v2"
```
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See the [docs](https://micro.mu/docs/framework.html) for detailed information on the architecture, installation and use of go-micro.
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## License
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Go Micro is Apache 2.0 licensed.
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