# Command Bus for ReactPHP

* Can run monolithic (create a bus and use as is), or distributed (create bus and use clients), or a hybrid.
* All commands called asynchronously using promises and deferreds.

## Installing

```shell
$ composer require noccylabs/react-command-bus:^0.1.0
```

## Usage

```php
// This is enough to setup a local bus.
$bus = new CommandBus();
$bus->register('hello', function (Context $context) {
    return new Promise(function (callable $resolve) use ($context) {
        return $resolve([ 'message' => "Hello, {$context->name}" ]);
    });
});

// You can call it as expected
$bus->execute('hello', [ 'name' => "Bob" ])
    ->then(function (array $result) {
        echo "Result: {$result['message']}\n";
    });

// Add a listener, and you can now connect to it!
$bus->addServer($server);


// So using this in another script works as expected, if you consider
// the async flow. See the examples for working examples.

$client = new CommandBusClient();
$client->connect($socket);

$client->execute('hello', [ 'name' => "Bob" ])
    ->then(function (array $result) {
        echo "Result: {$result['message']}\n";
    });


// The bus can also notify all clients about important events
$bus->notify('updateCompleted', [ 'info' => [] ]);

// Listening on the bus or client will yield the event
$bus->on('notify', function (string $event, array $data) {});
$client->on('notify', function (string $event, array $data) {});

```