Don't wait for code to execute

[evonicgu]

I want to have some long executing code to be executed after the result is returned. For example, I have a controller method that updates my DB. It must start the DB transaction and return the response immediately without waiting for the transaction to end. Is there any way to do this (not only with DB operations)?

[Yurunsoft]

$http = new Swoole\Http\Server("127.0.0.1", 9501);
$http->on('request', function ($request, $response) {
    $response->end("<h1>Hello Swoole. #".rand(1000, 9999)."</h1>");
    // create new coroutine
    go(function(){
        // do something
    });
});
$http->start();

[evonicgu]

The code is in my controller, that must return a \Psr\Http\ResponseInterface instance. I cannot use \Swoole\Http\Response::end() method.

[Yurunsoft]

The code is just an example, you can create a coroutine before return Or you can use \Swoole\Coroutine::defer(function(){/* do something */});

[evonicgu]

But if I create a coroutine I have to wait for it to execute. For example:

...
// create context and execute coroutine
Co\run(static function () {
    Co::sleep(1);
});
// return will happen after 1sec
return 1;

[Yurunsoft]

You need to use Swoole\Coroutine::create() or go()

[evonicgu]

And why is Co\run used everywhere in the documentation?

[Yurunsoft]

Co\run is designed to replace the patten go() + Swoole\Event::wait() as a context for executing coroutines.

https://www.swoole.co.uk/docs/modules/swoole-coroutine-create https://www.swoole.co.uk/docs/modules/swoole-coroutine-run

[evonicgu]

So, it creates a coroutine context, which is created by Swoole HTTP Server. Am i right?

[Yurunsoft]

Co\run will wait for the coroutine to finish executing. If you don’t need to wait for the execution of the coroutine, you can use Swoole\Coroutine::create().

[evonicgu]

Ok, thanks :)