[rabbitmq-discuss] Client connect/disconnect events on the server side

Mon Mar 14 20:42:19 GMT 2011

Miguel,

Miguel Morales wrote:
> Well I haven't researched this, but it's something that I need to 
> implement in the near future. Basically, I have a public broker which
> clients (android devices in my case) connect and disconnect.  When
> they log-in it would be considered that they are 'active' if they
> log-out it would be considered that they are 'inactive.'
> 
> This is important because other clients need to know information
> about 'active' clients.

Ah, so this is about 'presence'. That has come up a few times before. 
Might be worth searching the archives.

> I am indeed interested in network connects/disconnects, but I would
> also need to know the username of the client that just logged in. 
> (for example, if the client suddenly disconnects I need to set their
>  status to 'inactive' in my global database.)

Is the fact that a client has connected with a particular user name 
really indicating presence? Or is their presence perhaps only 
established when they start consuming from a queue?

> Other than that, I think my best choice would be to bind to the 
> amq.rabbitmq.log exchange (didn't know about it before) and parse the
>  log messages. However, that seems a bit brittle for me (might change
> between versions), but it would work well.

Unfortunately (for you) there is no log message containing the user name.

Matthias.