Ali-ons NPM | npm.io

ali-ons

Aliyun Open Notification Service Client (base on opensource project RocketMQ)

Sub module of ali-sdk.

Install

npm install ali-ons --save

Usage

consumer

'use strict';

const httpclient = require('urllib');
const Consumer = require('ali-ons').Consumer;
const consumer = new Consumer({
  httpclient,
  accessKeyId: 'your-accessKeyId',
  accessKeySecret: 'your-AccessKeySecret',
  consumerGroup: 'your-consumer-group',
  // namespace: '', // aliyun namespace support
  // isBroadcast: true,
});

consumer.subscribe(config.topic, '*', async msg => {
  console.log(`receive message, msgId: ${msg.msgId}, body: ${msg.body.toString()}`)
  // return Consumer.ACTION_RETRY; // you can return ACTION_RETRY, then this message will be directly retried
});

consumer.on('error', err => console.log(err));

If you want to use sql filter, you can subscribe a topic with a sql expression:

consumer.subscribe(
  config.topic,
  {
    expressionType: 'SQL92',
    subString: 'a is not null'
  },
  async msg => {
    console.log(`receive message, msgId: ${msg.msgId}, body: ${msg.body.toString()}`)
  }
);

For more information about sql filter, see: Filter Messages By SQL92

producer

'use strict';
const httpclient = require('urllib');
const Producer = require('ali-ons').Producer;
const Message = require('ali-ons').Message;

const producer = new Producer({
  httpclient,
  accessKeyId: 'your-accessKeyId',
  accessKeySecret: 'your-AccessKeySecret',
  producerGroup: 'your-producer-group',
  // namespace: '', // aliyun namespace support
});

(async () => {
  const msg = new Message('your-topic', // topic
    'TagA', // tag
    'Hello ONS !!! ' // body
  );

  // set Message#keys
  msg.keys = ['key1'];

  // delay consume
  // msg.setStartDeliverTime(Date.now() + 5000);

  const sendResult = await producer.send(msg);
  console.log(sendResult);
})().catch(err => console.error(err))