What the sense in ReactPHP and it is Promises if QueryBus works synchronously?

[BonBonSlick]

I have tested 2 queries

`$this->queryBus->dispatch(new GetUserList( ))->then(
            function($result){
                dump($result); // some result
            }
        );

        $this->queryBus->dispatch( new GetUserList( ))->then(
            function($result)  {
                dump($result); // empty should be
            }
        )
        ;`

for first one handler i put sleep for 5 seconds, and here results are

//first - should be last, coz results + sleep
Paginator {#3327 ▼
...
}
//second, should be first, because no sleep + empty results
[]

Maybe i missed something, please tell me please.

[prolic]

see https://github.com/prooph/service-bus/blob/master/tests/QueryBusTest.php Sascha-Oliver Prolic 2018-06-30 2:43 GMT+08:00 BonBonSlick <[email protected]>:

…

I have tested 2 queries `$this->queryBus->dispatch(new GetUserList( ))->then( function($result){ dump($result); // some result } ); $this->queryBus->dispatch( new GetUserList( ))->then( function($result) { dump($result); // empty should be } ) ;` for first one handler i put sleep for 5 seconds, and here reslts are //first - should be last, coz results + sleep Paginator {#3327 ▼ ... } //second, should be first, because no sleep + empty results [] — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#189>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AAYEvGoo4xUQEXwu-H2ym9upfSAmb0elks5uBnVUgaJpZM4U9da9> .

[BonBonSlick]

@prolic thank you for your response, i still do not get it.
What should i note?
Can you tell me please how to avoid promises, or use asynchronous?

[prolic]

You can wrap the query bus with your own implementation, so that you wrap the promise and return the real value. This should be very easy to write in a few minutes. I think someone posted the implementation for this already somewhere, but I can't remember.

About the initial question, I think you should use done() and not then() - see https://sergeyzhuk.me/2017/06/16/phpreact-promises/

[fritz-gerneth]

reactphp/promise#43 for a similar question. E.g. you have to make the async code yourself. For synchronous code the promise is still synchronous too.

[BonBonSlick]

@prolic Method 'done' not found in \React\Promise\PromiseInterface less... (Ctrl+F1 Alt+T)
Referenced method is not found in subject class.

[fritz-gerneth]

done is only a part of of PromiseInterface since v3. Before this (v2) it was part of the ExtendedPromiseInterface. When you'll return a Promise, it will both interfaces though.

[BonBonSlick]

Thank you for clarification.
I think it would be nice idea to add some extra examples for bus and event. Sync / async, and how to write tests for these features. Also add more info from https://github.com/reactphp/promise or at least some links to point where people should search.

[prolic]

@BonBonSlick @codeliner wanna provide some docs? otherwise it's just another issue sitting here for years :)

[BonBonSlick]

It is ok, we changed to symfony messenger. Use only your store everything else written from scratch