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                <?php  | 
            
                            
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                namespace Dazzle\Redis;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Dazzle\Promise\Deferred;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Dazzle\Redis\Command\Enum;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Dazzle\Loop\LoopInterface;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Dazzle\Loop\LoopAwareTrait;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Dazzle\Redis\Driver\Request;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Dazzle\Redis\Command\Builder;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Dazzle\Promise\PromiseInterface;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Dazzle\Throwable\Exception\RuntimeException;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Error;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                class Redis  | 
            
                            
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                { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    use LoopAwareTrait;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    use Command\Compose\ApiChannelTrait;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    use Command\Compose\ApiClusterTrait;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    use Command\Compose\ApiConnTrait;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    use Command\Compose\ApiCoreTrait;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    use Command\Compose\ApiGeospatialTrait;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    use Command\Compose\ApiHyperLogTrait;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    use Command\Compose\ApiKeyValTrait;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    use Command\Compose\ApiListTrait;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    use Command\Compose\ApiSetTrait;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    use Command\Compose\ApiSetHashTrait;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    use Command\Compose\ApiSetSortedTrait;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    use Command\Compose\ApiTransactionTrait;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @var string  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    protected $endpoint;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param string $endpoint  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param LoopInterface $loop  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function __construct($endpoint, LoopInterface $loop)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $this->endpoint = $endpoint;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $this->loop = $loop;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $this->dispatcher = new Dispatcher($loop);  | 
            
                            
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                        $this->driver = $this->dispatcher->getDriver();  | 
            
                            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function __destruct()  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Pipe Redis request.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param Request $command  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return PromiseInterface  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    private function pipe(Request $command)  | 
            
                            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $request = new Deferred();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $promise = $request->getPromise();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        if ($this->dispatcher->isEnding())  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $request->reject(new RuntimeException('Connection closed')); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        }   | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        else   | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $payload = $this->driver->commands($command);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $this->dispatcher->on('request', function () use ($payload) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                $this->dispatcher->handleRequest($payload);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            });  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $this->dispatcher->appendRequest($request);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return $promise;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function connect($config = [])  | 
            
                            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $this->dispatcher->watch($this->endpoint);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                };  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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The PSR-1: Basic Coding Standard recommends that a file should either introduce new symbols, that is classes, functions, constants or similar, or have side effects. Side effects are anything that executes logic, like for example printing output, changing ini settings or writing to a file.
The idea behind this recommendation is that merely auto-loading a class should not change the state of an application. It also promotes a cleaner style of programming and makes your code less prone to errors, because the logic is not spread out all over the place.
To learn more about the PSR-1, please see the PHP-FIG site on the PSR-1.