开源软件名称：

开源软件地址：

开源编程语言：

开源软件介绍：

Moleculer

Moleculer is a fast, modern and powerful microservices framework for Node.js. It helps you to build efficient, reliable & scalable services. Moleculer provides many features for building and managing your microservices.

Website: https://moleculer.services

Documentation: https://moleculer.services/docs

Top sponsors

What's included

• Promise-based solution (async/await compatible)
• request-reply concept
• support event driven architecture with balancing
• built-in service registry & dynamic service discovery
• load balanced requests & events (round-robin, random, cpu-usage, latency, sharding)
• many fault tolerance features (Circuit Breaker, Bulkhead, Retry, Timeout, Fallback)
• plugin/middleware system
• support versioned services
• support Streams
• service mixins
• built-in caching solution (Memory, MemoryLRU, Redis)
• pluggable loggers (Console, File, Pino, Bunyan, Winston, Debug, Datadog, Log4js)
• pluggable transporters (TCP, NATS, MQTT, Redis, NATS Streaming, Kafka, AMQP 0.9, AMQP 1.0)
• pluggable serializers (JSON, Avro, MsgPack, Protocol Buffer, Thrift, CBOR, Notepack)
• pluggable parameter validator
• multiple services on a node/server
• master-less architecture, all nodes are equal
• built-in parameter validation with fastest-validator
• built-in metrics feature with reporters (Console, CSV, Datadog, Event, Prometheus, StatsD)
• built-in tracing feature with exporters (Console, Datadog, Event, Jaeger, Zipkin, NewRelic)
• official API gateway, Database access and many other modules...

Installation

$ npm i moleculer

or

$ yarn add moleculer

Create your first microservice

This example shows you how to create a small service with an add action which can add two numbers and how to call it.

const { ServiceBroker } = require("moleculer");

// Create a broker
const broker = new ServiceBroker();

// Create a service
broker.createService({
    name: "math",
    actions: {
        add(ctx) {
            return Number(ctx.params.a) + Number(ctx.params.b);
        }
    }
});

// Start broker
broker.start()
    // Call service
    .then(() => broker.call("math.add", { a: 5, b: 3 }))
    .then(res => console.log("5 + 3 =", res))
    .catch(err => console.error(`Error occurred! ${err.message}`));

Try it in your browser

Create a Moleculer project

Use the Moleculer CLI tool to create a new Moleculer based microservices project.

1. Create a new project (named moleculer-demo)

   $ npx moleculer-cli -c moleculer init project moleculer-demo

2. Open the project folder

   $ cd moleculer-demo

3. Start the project

   $ npm run dev

4. Open the http://localhost:3000/ link in your browser. It shows a welcome page that contains more information about your project & you can test the generated services.