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<?php
namespace Illuminate\Bus;
use Closure;
use RuntimeException;
use Illuminate\Pipeline\Pipeline;
use Illuminate\Contracts\Queue\Queue;
use Illuminate\Contracts\Queue\ShouldQueue;
use Illuminate\Contracts\Container\Container;
use Illuminate\Contracts\Bus\QueueingDispatcher;
use Illuminate\Contracts\Bus\Dispatcher as DispatcherContract;
class Dispatcher implements DispatcherContract, QueueingDispatcher
{
/**
* The container implementation.
*
* @var \Illuminate\Contracts\Container\Container
*/
protected $container;
/**
* The pipeline instance for the bus.
*
* @var \Illuminate\Pipeline\Pipeline
*/
protected $pipeline;
/**
* The pipes to send commands through before dispatching.
*
* @var array
*/
protected $pipes = [];
/**
* The queue resolver callback.
*
* @var \Closure|null
*/
protected $queueResolver;
/**
* Create a new command dispatcher instance.
*
* @param \Illuminate\Contracts\Container\Container $container
* @param \Closure|null $queueResolver
* @return void
*/
public function __construct(Container $container, Closure $queueResolver = null)
{
$this->container = $container;
$this->queueResolver = $queueResolver;
$this->pipeline = new Pipeline($container);
}
/**
* Dispatch a command to its appropriate handler.
*
* @param mixed $command
* @return mixed
*/
public function dispatch($command)
{
if ($this->queueResolver && $this->commandShouldBeQueued($command)) {
return $this->dispatchToQueue($command);
} else {
return $this->dispatchNow($command);
}
}
/**
* Dispatch a command to its appropriate handler in the current process.
*
* @param mixed $command
* @return mixed
*/
public function dispatchNow($command)
{
return $this->pipeline->send($command)->through($this->pipes)->then(function ($command) {
return $this->container->call([$command, 'handle']);
});
}
/**
* Determine if the given command should be queued.
*
* @param mixed $command
* @return bool
*/
protected function commandShouldBeQueued($command)
{
return $command instanceof ShouldQueue;
}
/**
* Dispatch a command to its appropriate handler behind a queue.
*
* @param mixed $command
* @return mixed
*
* @throws \RuntimeException
*/
public function dispatchToQueue($command)
{
$connection = isset($command->connection) ? $command->connection : null;
$queue = call_user_func($this->queueResolver, $connection);
if (! $queue instanceof Queue) {
throw new RuntimeException('Queue resolver did not return a Queue implementation.');
}
if (method_exists($command, 'queue')) {
return $command->queue($queue, $command);
} else {
return $this->pushCommandToQueue($queue, $command);
}
}
/**
* Push the command onto the given queue instance.
*
* @param \Illuminate\Contracts\Queue\Queue $queue
* @param mixed $command
* @return mixed
*/
protected function pushCommandToQueue($queue, $command)
{
if (isset($command->queue, $command->delay)) {
return $queue->laterOn($command->queue, $command->delay, $command);
}
if (isset($command->queue)) {
return $queue->pushOn($command->queue, $command);
}
if (isset($command->delay)) {
return $queue->later($command->delay, $command);
}
return $queue->push($command);
}
/**
* Set the pipes through which commands should be piped before dispatching.
*
* @param array $pipes
* @return $this
*/
public function pipeThrough(array $pipes)
{
$this->pipes = $pipes;
return $this;
}
}
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