onConnect-Callback

Hey guys,

is it possible to wrap the activate() function in a Promise on your side? Otherwise I guess this client is not that useful … I am trying to use/execute it in a lambda function …

My workaround atm is:

  async connect(): Promise<void> { // Todo!
    this.client.activate();
    while (!this.client.connected) {
      await new Promise(resolve => setTimeout(resolve, 50));
    }
  }

[ghost]

So, this is my current solution:

  async connect(): Promise<void> {
    if (!this.stompjs.connected) {
      return new Promise((resolve, reject) => {
        this.stompjs.activate();
        this.stompjs.onConnect = () => {
          resolve();
        }
        // Todo: onError?
      });
    }
  }

  async send(
    queueName: string,
    body:      T,
  ): Promise<void> {
    try {
      await this.connect();
      const receiptId = nanoid();
      return new Promise((resolve, reject) => {
        this.stompjs.publish({ destination: queueName, body: JSON.stringify(body), headers: { receipt: receiptId } });
        this.stompjs.watchForReceipt(receiptId, () => {
          resolve();
        })
        // Todo: onError?
      });
    } catch(e) {
      console.error("RabbitMQ failed: %s", e);
      throw e;
    }
  }
  
//  ...
await send("queue", { key: "value" });

Maybe this is helpful for others facing this issue.

[kum-deepak]

I think that should work.

Based on your requirements, you may be able to write similar code, though a different structure, without the RxJS wrapper.