Stop watching connection state when onNext() is called

So I have discovered a weird bug:

I have subscribed to messages like this inside an injectible service:

this._stompMessages = this._stompService.subscribe('/user/queue/messages'); this.subscription = this._stompMessages.subscribe(this.on_next);

When the on_next method gets called I want to push something to a BehaviorSubject that is a property of this service. So inside on_next I do something like this:

this._messages.next(this._messages.getValue().concat(value));

This causes an UNSUBSCRIBE command, but why?

“Stop watching connection state (for /user/queue/messages)” ng2-stompjs.es5.js:58 “Will unsubscribe from /user/queue/messages at Stomp” ng2-stompjs.es5.js:58 ">>> UNSUBSCRIBE id:sub-0

[kum-deepak]

I had a look at your log file. Please try wrapping the code within onNext in a try-catch block, similar to the following:

  public onNext = (message: Message) => {
    try {
      console.log(JSON.parse(message.body));
      if (JSON.parse(message.body) != 0) {
        if (...)
      .....
      }
      else {
      .....
      }
    } catch (e) {
      // Handle it properly
      console.error(e);
    }
  };

Let me know if it solves your issue.

[Fridthjof]

I don’t know if that was the thing that made it work, since i did some smaller tries of things.

But it works now!