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<?php
namespace Illuminate\Bus;
use Closure;
use Illuminate\Contracts\Bus\QueueingDispatcher;
use Illuminate\Contracts\Container\Container;
use Illuminate\Contracts\Queue\Queue;
use Illuminate\Contracts\Queue\ShouldQueue;
use Illuminate\Foundation\Bus\PendingChain;
use Illuminate\Pipeline\Pipeline;
use Illuminate\Queue\InteractsWithQueue;
use Illuminate\Queue\Jobs\SyncJob;
use Illuminate\Support\Collection;
use RuntimeException;
class Dispatcher implements 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 command to handler mapping for non-self-handling events.
*
* @var array
*/
protected $handlers = [];
/**
* 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)
{
return $this->queueResolver && $this->commandShouldBeQueued($command)
? $this->dispatchToQueue($command)
: $this->dispatchNow($command);
}
/**
* Dispatch a command to its appropriate handler in the current process.
*
* Queueable jobs will be dispatched to the "sync" queue.
*
* @param mixed $command
* @param mixed $handler
* @return mixed
*/
public function dispatchSync($command, $handler = null)
{
if ($this->queueResolver &&
$this->commandShouldBeQueued($command) &&
method_exists($command, 'onConnection')) {
return $this->dispatchToQueue($command->onConnection('sync'));
}
return $this->dispatchNow($command, $handler);
}
/**
* Dispatch a command to its appropriate handler in the current process without using the synchronous queue.
*
* @param mixed $command
* @param mixed $handler
* @return mixed
*/
public function dispatchNow($command, $handler = null)
{
$uses = class_uses_recursive($command);
if (in_array(InteractsWithQueue::class, $uses) &&
in_array(Queueable::class, $uses) &&
! $command->job) {
$command->setJob(new SyncJob($this->container, json_encode([]), 'sync', 'sync'));
}
if ($handler || $handler = $this->getCommandHandler($command)) {
$callback = function ($command) use ($handler) {
$method = method_exists($handler, 'handle') ? 'handle' : '__invoke';
return $handler->{$method}($command);
};
} else {
$callback = function ($command) {
$method = method_exists($command, 'handle') ? 'handle' : '__invoke';
return $this->container->call([$command, $method]);
};
}
return $this->pipeline->send($command)->through($this->pipes)->then($callback);
}
/**
* Attempt to find the batch with the given ID.
*
* @param string $batchId
* @return \Illuminate\Bus\Batch|null
*/
public function findBatch(string $batchId)
{
return $this->container->make(BatchRepository::class)->find($batchId);
}
/**
* Create a new batch of queueable jobs.
*
* @param \Illuminate\Support\Collection|array|mixed $jobs
* @return \Illuminate\Bus\PendingBatch
*/
public function batch($jobs)
{
return new PendingBatch($this->container, Collection::wrap($jobs));
}
/**
* Create a new chain of queueable jobs.
*
* @param \Illuminate\Support\Collection|array $jobs
* @return \Illuminate\Foundation\Bus\PendingChain
*/
public function chain($jobs)
{
$jobs = Collection::wrap($jobs);
return new PendingChain($jobs->shift(), $jobs->toArray());
}
/**
* Determine if the given command has a handler.
*
* @param mixed $command
* @return bool
*/
public function hasCommandHandler($command)
{
return array_key_exists(get_class($command), $this->handlers);
}
/**
* Retrieve the handler for a command.
*
* @param mixed $command
* @return bool|mixed
*/
public function getCommandHandler($command)
{
if ($this->hasCommandHandler($command)) {
return $this->container->make($this->handlers[get_class($command)]);
}
return false;
}
/**
* 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 = $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);
}
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);
}
/**
* Dispatch a command to its appropriate handler after the current process.
*
* @param mixed $command
* @param mixed $handler
* @return void
*/
public function dispatchAfterResponse($command, $handler = null)
{
$this->container->terminating(function () use ($command, $handler) {
$this->dispatchNow($command, $handler);
});
}
/**
* 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;
}
/**
* Map a command to a handler.
*
* @param array $map
* @return $this
*/
public function map(array $map)
{
$this->handlers = array_merge($this->handlers, $map);
return $this;
}
}