react-parallel/event-loop

🌀🌉🌀 Event Loop bridge to ext-parallel Events

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WyriHaximus

1.2.0 2020-12-19 16:47 UTC

README

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Installation

To install via Composer, use the command below, it will automatically detect the latest version and bind it with ~.

composer require react-parallel/event-loop 

Usage

Set up

Just like the ReactPHP event loop, you should only have one bridge. You can have multiple, and unlike the ReactPHP event loop, that will work, but it adds additional overhead when you have more than a few. Having a hand full for different major contexts. Share this bridge around so that other packages can use them, and only have one instance checking for events.

use React\EventLoop\Factory;
use ReactParallel\EventLoop\EventLoopBridge;

$loop = Factory::create();
$eventLoopBridge = new EventLoopBridge($loop);

$loop->run();

Channels

Channels often have a stream of messages going over them, as such the bridge will convert them into an observable.

use parallel\Channel;
use React\EventLoop\Factory;
use ReactParallel\EventLoop\EventLoopBridge;

$loop = Factory::create();
$eventLoopBridge = new EventLoopBridge($loop);

$channel = new Channel(Channel::Infinite);
$eventLoopBridge->observe($channel)->subscribe(function (string $message) {
    echo $message, PHP_EOL;
});

$loop->futureTick(function () use ($channel): void {
    $channel->send('Hello World!');
    $channel->close();
});

$loop->run();

Futures

Where promises are push, futures are pull, as such the event loop will poll and resolve the promise once a result is available.

use parallel\Channel;
use React\EventLoop\Factory;
use ReactParallel\EventLoop\EventLoopBridge;
use function parallel\run;

$loop = Factory::create();
$eventLoopBridge = new EventLoopBridge($loop);

$future = run(function (): string {
    return 'Hello World!';
});

$channel = new Channel(Channel::Infinite);
$eventLoopBridge->await($future)->then(function (string $message) {
    echo $message, PHP_EOL;
});

$loop->run();

Metrics

This package supports metrics through wyrihaximus/metrics:

use React\EventLoop\Factory;
use ReactParallel\EventLoop\EventLoopBridge;
use ReactParallel\EventLoop\Metrics;
use WyriHaximus\Metrics\Configuration;
use WyriHaximus\Metrics\InMemory\Registry;

$loop = Factory::create();
$eventLoopBridge = (new EventLoopBridge($loop))->withMetrics(Metrics::create(new Registry(Configuration::create())));

Contributing

Please see CONTRIBUTING for details.

License

Copyright 2020 Cees-Jan Kiewiet

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.