Node.js AMQP+；节点等待通道

我在FeathersJS中有一个启动到RabbitMQ连接的服务，问题是如何在接收请求之前等待通道准备就绪：

class Service {
  constructor({ amqpConnection, queueName }) {
    this.amqpConnection = amqpConnection;
    this.queueName = queueName;
    this.replyQueueName = queueName + "Reply"
  }

  async create(data, params) {
    new Promise(resolve => {
      if (!this.channel) await this.createChannel();
      channel.responseEmitter.once(correlationId, resolve);
      channel.sendToQueue(this.queueName, Buffer.from(data), {
        correlationId: asyncLocalStorage.getStore(),
        replyTo: this.replyQueueName,
      });
    });
  }

  async createChannel() {
    let connection = this.amqpConnection();
    let channel = await connection.createChannel();

    await channel.assertQueue(this.queueName, {
      durable: false,
    });

    this.channel = channel;
    channel.responseEmitter = new EventEmitter();
    channel.responseEmitter.setMaxListeners(0);
    channel.consume(
      this.replyQueueName,
      (msg) => {
        channel.responseEmitter.emit(
          msg.properties.correlationId,
          msg.content.toString("utf8")
        );
      },
      { noAck: true }
    );
  }
  ....
}

---

在请求期间等待创建通道似乎是一种浪费。如何“正确地”执行此操作？

Feathers服务可以实现一个在服务器启动时调用（或者您自己调用

app.setup（）

的服务）：

---

是否有更高级别的异步

设置

选项-例如，在应用程序级别创建连接，然后在服务级别创建通道？

class Service {
  async setup () {
    await this.createChannel();
  }
}