Apache Dubbo-js

Dubbo-js, using Node.js to embrace the Dubbo ecosystem. See this Demo to find how intelligent this project is.

Features

• Various transport protocols (Hessian, JSON-RPC etc.) supports
• Tracing (Runtime information, Call Stack)
• Multiple registry centers (Zookeeper, Nacos, Redis) supports or connecting to services directly
• Extensibility, inspired from Koa Middleware
• Builtin reconnection strategy
• Typescript type definitions
• Tools to automatically translate Java interfaces to Typescript type definitions
• Dubbox supports

Architecture

Getting Started

yarn add dubbo2.js

Usage

Below code snippet shows how to work with the typescript type definitions which automatically translated from Java interfaces.

// ===================== service.ts ==================
// generated by interpret tools
import {BasicTypeProvider} from './providers/com/alibaba/dubbo/demo/BasicTypeProvider';
import {DemoProvider} from './providers/com/alibaba/dubbo/demo/DemoProvider';
import {ErrorProvider} from './providers/com/alibaba/dubbo/demo/ErrorProvider';

export default {
  BasicTypeProvider,
  DemoProvider,
  ErrorProvider,
};

// =============== dubbo.ts ========================
import {Dubbo} from 'dubbo2.js';
import service from './service';

// create dubbo object
const dubbo = new Dubbo<typeof service>({
  application: {name: 'node-dubbo'},
  // zookeeper address
  register: 'localhost:2181',
  service,
});

// main method
(async () => {
  let {res, err} = await dubbo.service.DemoProvider.sayHello('node');
  // print {err: null, res:'hello node from dubbo service'}
  ({res, err} = await dubbo.service.DemoProvider.echo());
  // print {err: null, res: 'pang'}
  ({res, err} = await dubbo.service.DemoProvider.getUserInfo());
  // print {status: 'ok', info: { id: '1', name: 'test' }, err: null}
})();

The automatically translated typescript type definitions are not necessary, below code snippet demonstrates how to use dubbo-js without them.

// create the service to be injected
import {Dubbo} from 'dubbo2.js';

const demoProvider = dubbo =>
  dubbo.proxyService({
    dubboInterface: 'com.alibaba.dubbo.demo.DemoProvider',
    version: '1.0.0',
    methods: {
      sayHello(name) {
        return [java.String(name)];
      },

      echo() {},

      test() {},

      getUserInfo() {
        return [
          java.combine('com.alibaba.dubbo.demo.UserRequest', {
            id: 1,
            name: 'nodejs',
            email: 'node@qianmi.com',
          }),
        ];
      },
    },
  });

// integrate the service in demoProvider with dubbo object constructor
const service = {
  demoProvider,
};

const dubbo = new Dubbo<typeof service>({
  // ....other parameters
  service,
});

For contributors

If you'd like to contribute, it's a good start to follow below commands to get a locally runnable project.

# start zookeeper cluster
docker-compose up

# start java
cd java/dubbo-demo
mvn clean install
cd java/dubbo-demo/dubbo-demo-provider
mvn clean package
java -jar target/dubbo-demo-provider-2.6.3-jar-with-dependencies.jar

# build
make

# start node
cd example/hello-koa
npm run debug:start

# test /hello
curl http://localhost:3000/hello

Next steps

Guides

Reporting bugs

Please follow the template for reporting any issues.

Knowledge Sharing

2019-meetup by hufeng

Thanks

Dubbo-js will not work without:

• js-to-java
• hessian.js

Many thanks to their authors fengmk2 and dead-horse.

License

Apache Dubbo is under the Apache 2.0 license. See the LICENSE file for details.