observatory
General Observation Pattern Component, (*1)
, (*2)
What is observatory?
Observatory is a general interface orchestration for observable
objects using a container for data transport. It's inspired by
the SplObserver implementation of PHP., (*3)
What is the goal of observatory?
Providing an easy to use, easy to understand, lightweight
event hub to specific implementations without provided
methods for each event invoker registration., (*4)
How to use it?
Subcosm Observatory is available at Packagist:, (*5)
# composer require subcosm/observatory ~1.0
Creating the Observable Object
use Subcosm\Observable\{
ObservableInterface,
ObservableTrait,
AbstractObservationContainer as Container
};
class Foo implements ObservableInterface {
use ObservableTrait;
public function firstAction()
{
$message = 'Hello from firstAction!';
$container = new class($this, __METHOD__, $message) extends Container {
protected $message;
public function __construct($object, string $stage, string $message)
{
$this->message = $message;
parent::__construct($object, $stage);
}
public function getMessage()
{
$this->message;
}
};
$this->notify($container);
}
public function secondAction()
{
$message = 'Another hello from secondAction!';
$container = new class($this, __METHOD__, $message) extends Container {
protected $message;
public function __construct($object, string $stage, string $message)
{
$this->message = $message;
parent::__construct($object, $stage);
}
public function getMessage()
{
$this->message;
}
};
$this->notify($container);
}
}
Creating an Observer
use Subcosm\Observable\{
ObserverInterface,
ObservationContainerInterface as Container
};
class EchoMessageObserver implements ObserverInterface {
public function update(Container $container)
{
echo $container->getMessage().PHP_EOL;
}
}
Using the Observable and Observer
$observable = new Foo;
$observer = new EchoMessageObserver;
$observable->attach($observer);
$observable->firstAction();
$observable->secondAction();
Results in:, (*6)
Hello from firstAction!
Another hello from secondAction!
Package Stability and Maintainers
This package is considered stable. The maintainers of this package are:, (*7)
License
This package is licensed under the MIT-License., (*8)
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