module.exports = class Queue {
    constructor(consumer, name, conf) {
      Object.assign(this, {consumer, name, conf});
    }

    async consume() {
      const channel = await this.consumer.amqpConn.createChannel();
      channel.prefetch(this.conf.amqpPrefetch);
      const {amqPrefix} = this.consumer.conf;
      const amqQueue = `${amqPrefix}.${this.name}`;

      await channel.assertQueue(amqQueue, {
        durable: true
      });
      this.channel = channel;
  
      await channel.consume(amqQueue,
        msg => this.onConsume(msg));
    }
}