62 lines
2.5 KiB
Markdown
62 lines
2.5 KiB
Markdown
|
# ```reactphp-input-stream```
|
||
|
## What is this?
|
||
|
A compact library that can wrap a non-blocking input to behave like a [stream](https://reactphp.org/stream/) in a [ReactPHP EventLoop](https://reactphp.org/event-loop/).
|
||
|
|
||
|
## How do I use this?
|
||
|
Check out the `examples` folder. It contains a very basic example of a non-blocking input implementation, as well
|
||
|
as a very (_very_) lame joke generator.
|
||
|
|
||
|
## Why is this useful?
|
||
|
I needed to respond to incoming AMQP messages in my event loop and I was feeling adventurous.
|
||
|
Admittedly, I could have just used a periodic timer directly (that is what this library uses under the hood), but where's the fun in that?
|
||
|
|
||
|
I hear you ask: "_Where's the code that deals with the AMQP messages_?"
|
||
|
While I was writing this, I felt like it would be useful to
|
||
|
separate the logic of dealing with input in a stream-like manner from the logic that
|
||
|
deals with AMQP messages.
|
||
|
This means you can reuse this library to map practically anything to a readable stream.
|
||
|
An extra-lame example of this can be found in `examples/jokes_example.php`.
|
||
|
|
||
|
When the code for AMQP consumption as stream is finished, I will link it here.
|
||
|
|
||
|
## Where are the unit tests?
|
||
|
_Errrrrr..._
|
||
|
|
||
|
## How do I install this?
|
||
|
This should do it [once it's available on Packagist](https://packagist.org/packages/joopschilder/):
|
||
|
```bash
|
||
|
composer require joopschilder/reactphp-input-stream
|
||
|
```
|
||
|
|
||
|
## Mandatory block of example code
|
||
|
```php
|
||
|
// Say, we have an event loop...
|
||
|
$loop = Factory::create();
|
||
|
|
||
|
// And say, we have a non-blocking input called $input...
|
||
|
$input = new DemoNonBlockingInput();
|
||
|
|
||
|
// Then we can create a ReadableStream from it like so:
|
||
|
$stream = new ReadableNonBlockingInputStream($input, $loop);
|
||
|
|
||
|
// If your 'select()' method takes a long time to execute, or you just don't
|
||
|
// feel like polling the input availability that often, you can
|
||
|
// set a custom polling interval by supplying an instance of PollingInterval
|
||
|
// as the third constructor parameter:
|
||
|
$lowPollingStream = new ReadableNonBlockingInputStream($input, $loop, new PollingInterval(5));
|
||
|
|
||
|
// Of course, the stream emits all expected events (except end)
|
||
|
$stream->on('data', fn() => print('m'));
|
||
|
$stream->on('error', fn() => print('e'));
|
||
|
$stream->on('close', fn() => print('c'));
|
||
|
|
||
|
// If you know what data your input returns, you may type-hint it:
|
||
|
$stream->on('data', fn(Joke $joke) => print($joke . PHP_EOL));
|
||
|
|
||
|
// Add a periodic timer for demonstration purposes
|
||
|
$loop->addPeriodicTimer(0.2, fn() => print('.'));
|
||
|
|
||
|
// And kick 'er off.
|
||
|
$loop->run();
|
||
|
```
|