Rabbit and most others do; but only once it reaches the queue itself. The problem that using a fb to queue stuff gets around is guaranteeing it earlier; your ch

Rabbit and most others do; but only once it reaches the queue itself. The problem that using a fb to queue stuff gets around is guaranteeing it earlier; your changes to database and the queued messages are either all committed, or not - a single transaction. This is hard to impossible with queues outside a dB. However obviously it’s a trade off; it’s slower, it’s more work and connections to your dB. But, you don’t have to code around messages either never sent it from a later rolled back transaction.