Feature: Add fifo middleware

[hadeli]

In order to facilite fifo attributes usage, i need to automate MessageGroupId & MessageDeduplicationId stamp adding

[mnapoli]

That sounds like a lot of new things to add, document and maintain. Could you clarify why we may want this? "In order to facilite fifo attributes usage" is not that clear to me.

[shouze]

@mnapoli Looks like it makes using SQS message groups plug & play. At the moment Symfony/Messenger just provides the Stamp but no Middleware and probably won't.

As you know, message groups provides the ability of highly concurrent processing messages like when you don't have FIFO queues, but with FIFO queues hence you don't have to bother with message order, the good part of FIFO with the good part of non FIFO.

[mnapoli]

Thanks!

Sorry I'll do a bit of meta, but my intrinsic motivation (to be transparent) is that I don't want to maintain anything more than necessary :p

The goal of this package is to make Symfony Messenger work out of the box on AWS Lambda. I'm wondering if new middlewares/stamps belong specifically in this package, or would instead better be in:

• either Symfony Messenger itself,
• or a 3rd party package (if Symfony doesn't want this)

?

I understand the convenience of having this here (works out of the box), but is that feature strictly related to Bref? Or could these classes be useful outside of Bref/AWS lambda?

[tyx]

Hello @mnapoli ,

You're right this stuff is only a help to use AmazonSqsFifoStamp that belongs to Symfony sqs transport.

We will give a try to move this PR overthere

[tyx]

Just create PR on symfony repository : https://github.com/symfony/symfony/pull/48095

We can close here

[mnapoli]

Awesome!