amqplib/examples/headers.js

An AMQP 0-9-1 (e.g., RabbitMQ) library and client.

#!/usr/bin/env node

const amqp = require('../');

(async () => {
  const connection = await amqp.connect();
  const channel = await connection.createChannel();

  process.once('SIGINT', async () => {
    await channel.close();
    await connection.close();
  });

  const { exchange } = await channel.assertExchange('matching exchange', 'headers');
  const { queue } = await channel.assertQueue();

  // When using a headers exchange, the headers to be matched go in
  // the binding arguments. The routing key is ignore, so best left
  // empty.

  // 'x-match' is 'all' or 'any', meaning "all fields must match" or
  // "at least one field must match", respectively. The values to be
  // matched go in subsequent fields.
  await channel.bindQueue(queue, exchange, '', {
    'x-match': 'any',
    foo: 'bar',
    baz: 'boo',
  });

  await channel.consume(
    queue,
    (message) => {
      console.log(message.content.toString());
    },
    { noAck: true },
  );

  channel.publish(exchange, '', Buffer.from('hello'), { headers: { baz: 'boo' } });
  channel.publish(exchange, '', Buffer.from('hello'), { headers: { foo: 'bar' } });
  channel.publish(exchange, '', Buffer.from('lost'), { headers: { meh: 'nah' } });

  console.log(' [x] To exit press CTRL+C.');
})();