每天laravel-20160710|Event

<?phpnamespace Illuminate\Console\Scheduling;use Closure;use Carbon\Carbon;use LogicException;use Cron\CronExpression;use GuzzleHttp\Client as HttpClient;use Illuminate\Contracts\Mail\Mailer;use Symfony\Component\Process\Process;use Symfony\Component\Process\ProcessUtils;use Illuminate\Contracts\Container\Container;// namespaceclass Event{    /**     * The command string.     *     * @var string     */    public $command;// The command string    /**     * The cron expression representing the event's frequency.     *     * @var string     */    public $expression = '* * * * * *';    // The cron expression representing the event's frequency.    /**     * The timezone the date should be evaluated on.     *     * @var \DateTimeZone|string     */    public $timezone;    // The timezone the data should be evaluated on.    /**     * The user the command should run as.     *     * @var string     */    public $user;// The user the command should run as.    /**     * The list of environments the command should run under.     *     * @var array     */    public $environments = [];// The list of environments the command should run under.    /**     * Indicates if the command should run in maintenance mode.     *     * @var bool     */    public $evenInMaintenanceMode = false;// Indicate if the command should run in maintenance mode.    /**     * Indicates if the command should not overlap itself.     *     * @var bool     */    public $withoutOverlapping = false;// Indicates if the command should not overlap itself    /**     * The array of filter callbacks.     *     * @var array     */    protected $filters = [];// The array of filter callbacks    /**     * The array of reject callbacks.     *     * @var array     */    protected $rejects = [];// The array of reject callbacks    /**     * The location that output should be sent to.     *     * @var string     */    public $output = '/dev/null'; //The location that output should be sent to.    /**     * Indicates whether output should be appended.     *     * @var bool     */    protected $shouldAppendOutput = false;// Indicates whether output should be appended.    /**     * The array of callbacks to be run before the event is started.     *     * @var array     */    protected $beforeCallbacks = [];// The array of callbacks to be run before the event is started.    /**     * The array of callbacks to be run after the event is finished.     *     * @var array     */    protected $afterCallbacks = [];// The array of callbacks to be run after the event is finished    /**     * The human readable description of the event.     *     * @var string     */    public $description;// The human readable description of the event.    /**     * Create a new event instance.     *     * @param  string  $command     * @return void     */    public function __construct($command)    {        $this->command = $command;// set command        $this->output = $this->getDefaultOutput();// output this path    }// create a new event instance.    /**     * Get the default output depending on the OS.     *     * @return string     */    protected function getDefaultOutput()    {        return (DIRECTORY_SEPARATOR == '\\') ? 'NUL' : '/dev/null';    }// get the default output depending on the OS[linux/windows]    // back the difference path to the difference os    /**     * Run the given event.     *     * @param  \Illuminate\Contracts\Container\Container  $container     * @return void     */    public function run(Container $container)    {        $this->runCommandInForeground($container);    }// Run the given event.    // use api function runCommandInForeground    /**     * Run the command in the foreground.     *     * @param  \Illuminate\Contracts\Container\Container  $container     * @return void     */    protected function runCommandInForeground(Container $container)    {        $this->callBeforeCallbacks($container);// call Before Call backs        (new Process(            trim($this->buildCommand(), '& '), base_path(), null, null, null        ))->run();// too complex ,        $this->callAfterCallbacks($container);    }//Run the command in the foreground    /**     * Call all of the "before" callbacks for the event.     *     * @param  \Illuminate\Contracts\Container\Container  $container     * @return void     */    protected function callBeforeCallbacks(Container $container)    {        foreach ($this->beforeCallbacks as $callback) {            $container->call($callback);        }    }// use the instance call the difference method    /**     * Call all of the "after" callbacks for the event.     *     * @param  \Illuminate\Contracts\Container\Container  $container     * @return void     */    protected function callAfterCallbacks(Container $container)    {        foreach ($this->afterCallbacks as $callback) {            $container->call($callback);        }    }// same to the before, use a way to set the order.    /**     * Build the command string.     *     * @return string     */    public function buildCommand()    {        $output = ProcessUtils::escapeArgument($this->output);// a static method to path about the difference os        $redirect = $this->shouldAppendOutput ? ' >> ' : ' > ';// this not ready for windows.        if ($this->withoutOverlapping) {            $command = '(touch '.$this->mutexPath().'; '.$this->command.'; rm '.$this->mutexPath().')'.$redirect.$output.' 2>&1 &';        } else {            $command = $this->command.$redirect.$output.' 2>&1 &';        }// use in shell        return $this->user ? 'sudo -u '.$this->user.' '.$command : $command;// use for ubuntu server    }// Build the command string.    /**     * Get the mutex path for the scheduled command.     *     * @return string     */    protected function mutexPath()    {        return storage_path('framework/schedule-'.sha1($this->expression.$this->command));    }// Get the mutex path for the scheduled command.    // get the different path even for the same person    /**     * Determine if the given event should run based on the Cron expression.     *     * @param  \Illuminate\Contracts\Foundation\Application  $app     * @return bool     */    public function isDue($app)    {        if (! $this->runsInMaintenanceMode() && $app->isDownForMaintenance()) {            return false;        }// if runs        return $this->expressionPasses() &&               $this->runsInEnvironment($app->environment());    }// Determine if the given event should run based on the Cron expression.    /**     * Determine if the Cron expression passes.     *     * @return bool     */    protected function expressionPasses()    {        $date = Carbon::now();// get Data        if ($this->timezone) {            $date->setTimezone($this->timezone);        }// setTimezo        // use a factory.        return CronExpression::factory($this->expression)->isDue($date->toDateTimeString());    }// Determine if the cron expression passes.