amqplib sendToQueue() 没有向 RabbitMQ 发送消息

Question

我正在围绕amqplib 的 Promise API 构建一个 Typescript 包，以便更简单地在两个 RabbitMQ 队列之间发送消息。

这是所述包的类中的一个方法，负责向 RabbitMQ 发送消息。它实际上并没有发送消息，因为我无法从 CloudAMQP 中看到它们。

class PostOffice {
    connection: any;

    constructor(connection: any) {
        this.connection = connection;
    }

    //...

    // TMQMessage is an object that can be trivially serialized to JSON
    // The Writer class holds the channel because I'm having trouble
    // making Typescript class member updates stick after a method returns.
    async send(writer: Writer, message: TMQMessage) {
        //...RabbitMQ code begins here
        let channel = writer.stageConsume[0]; // This channel is created elsewhere
        
        // Queue is created here and I can see it in CloudAMQP.
        await channel.assertQueue(message.to + "/stage/1", {
            durable: true,
        }); // `message.to` is a string indicating destination, e.g. 'test/hello'
        
        // According to docs, the content should be converted to Buffer
        await channel.sendToQueue(message.to + "/stage/1", Buffer.from(JSON.stringify(message)));
        
        channel.close()
    }

}

这是我创建的一个创建连接和通道的类，在这里使用：

import { Writer } from "./Writer";

export class ConnectionFactory {
    url: string;
    amqp: any;
    constructor(url: string) {
        this.url = url;
        this.amqp = require('amqplib');
    }

    async connect(timeout: number = 2000) {
        let connection = await this.amqp.connect(this.url, {
            // timeout for a message acknowledge.
            timeout, // Make the timeout 2s per now
        })
        return connection;
    }
    async createChannels(connection: any, writer: Writer) {
        //... relevant code starts here
        let stageChannels = [];
        stageChannels.push(await connection.createChannel())
        writer.stageConsume = stageChannels;
        return writer;
    }
}

}

我的连接工厂似乎工作正常，因为我可以看到来自 CloudAMQP 仪表板的连接。我也可以从仪表板看到已创建（在我的代码中声明）的队列。但是，我无法让 amqplib 向 CloudAMQP 发送消息。

这是我用来调用我的包的（异步）代码：

let Cf = new ConnectionFactory(url)
let connection = await Cf.connect()
let writer = new Writer();

let message: TMQMessage = {
    //... message content in JSON
}

writer = await Cf.createChannels(connection, writer)
let po = new PostOffice(connection)
await po.send(writer, message)

似乎出了什么问题？

Answer 1

可能也想等待 close 方法。但总的来说，我会推荐 amqp-client.js（也有 TypeScript 定义），https://github.com/cloudamqp/amqp-client.js/