mamuz / message-bridge
Message bridge to support a decoupled event driven and aspect oriented application
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Requires
- php: ^7.0
Requires (Dev)
- phpunit/phpunit: ~5.5
README
Message Bridge let you trigger messages from anywhere in a procedural or in an object-oriented way. A registered callback can dispatch or forward all triggered messages. Main idea is to support a decoupled event driven and aspect oriented application, thus object awareness to any logger or any event dispatcher is not needed anymore.
Installation
Install the latest version with
$ composer require mamuz/message-bridge
Example
Procedural
// Register dispatch callback globally set_message_dispatcher(function ($msg, $argv, $emitter) { if ($msg == 'user.registered') { mail('foo@bar.com', 'A new user entered', 'UserId ' . $argv['userId']); } }); // Trigger any message anywhere trigger_message('user.registered', array('userId' => 1234));
Object oriented way with forwarding
$bridge = \MsgBridge\MessageBridge::getInstance(); $bridge->bindDispatcher(function ($msg, $argv, $emitter) use ($eventManager) { $eventManager->trigger($msg, $argv, $emitter); }); // ... $bridge->trigger('user.registered', array('userId' => 1234));
Locking concept and Test Isolation
To prevent side-effects the dispatcher can be registered with write protection.
$locked = true; set_message_dispatcher($closure, $locked); // This will throw a RuntimeException now set_message_dispatcher($anotherClosure);
In Unit Tests you should not register a dispatcher with write protection, otherwise test isolation is not given. Instead of that implement following snippet to the tearDown method.
public function tearDown() { \MsgBridge\MessageBridge::getInstance()->unsetDispatcher(); }
As an alternative you can add the provided TestListener to your phpunit.xml. This Listener will do the job for you automaticly.
<phpunit> <listeners> <listener class="\MsgBridge\TestListener"></listener> </listeners> </phpunit>