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Initial structure of Queue system, with Redis driver
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Kijin Sung
parent
574e89b028
commit
78bbc2ffa5
5 changed files with 569 additions and 0 deletions
305
common/framework/Queue.php
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305
common/framework/Queue.php
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<?php
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namespace Rhymix\Framework;
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/**
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* The Queue class.
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*/
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class Queue
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{
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/**
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* Static properties.
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*/
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protected static $_drivers = [];
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/**
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* Add a custom Queue driver.
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*
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* @param string $name
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* @param object $driver
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* @return void
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*/
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public static function addDriver(string $name, Drivers\QueueInterface $driver): void
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{
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self::$_drivers[$name] = $driver;
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}
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/**
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* Get the default driver.
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*
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* @param string $name
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* @return ?Drivers\QueueInterface
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*/
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public static function getDriver(string $name): ?Drivers\QueueInterface
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{
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if (isset(self::$_drivers[$name]))
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{
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return self::$_drivers[$name];
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}
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$driver_class = '\Rhymix\Framework\Drivers\Queue\\' . $name;
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if (class_exists($driver_class))
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{
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$driver_config = config('queue.' . $name) ?: [];
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return self::$_drivers[$name] = $driver_class::getInstance($driver_config);
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}
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else
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{
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return null;
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}
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}
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/**
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* Get the list of supported Queue drivers.
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*
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* @return array
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*/
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public static function getSupportedDrivers(): array
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{
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$result = [];
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foreach (Storage::readDirectory(__DIR__ . '/drivers/queue', false) as $filename)
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{
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$driver_name = substr($filename, 0, -4);
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$class_name = '\Rhymix\Framework\Drivers\Queue\\' . $driver_name;
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if ($class_name::isSupported())
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{
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$result[$driver_name] = [
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'name' => $class_name::getName(),
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'required' => $class_name::getRequiredConfig(),
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'optional' => $class_name::getOptionalConfig(),
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];
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}
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}
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foreach (self::$_drivers as $driver_name => $driver)
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{
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if ($driver->isSupported())
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{
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$result[$driver_name] = [
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'name' => $driver->getName(),
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'required' => $driver->getRequiredConfig(),
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'optional' => $driver->getOptionalConfig(),
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];
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}
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}
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ksort($result);
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return $result;
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}
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/**
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* Add a task.
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*
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* The handler can be in one of the following formats:
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* - Global function, e.g. myHandler
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* - ClassName::staticMethodName
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* - ClassName::getInstance()->methodName
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* - new ClassName()->methodName
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*
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* Once identified and/or instantiated, the handler will be passed $args
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* and $options, in that order. Each of them must be a single object.
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*
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* It is strongly recommended that you write a dedicated method to handle
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* queued tasks, rather than reusing an existing method with a potentially
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* incompatible structure. If you must to call an existing method,
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* you should consider writing a wrapper.
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*
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* Any value returned by the handler will be discarded. If you throw an
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* exception, it may be logged, but it will not cause a fatal error.
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*
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* @param string $handler
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* @param ?object $args
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* @param ?object $options
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* @return int
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*/
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public static function addTask(string $handler, ?object $args = null, ?object $options = null): int
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{
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$driver_name = config('queue.driver');
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if (!$driver_name)
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{
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throw new Exceptions\FeatureDisabled('Queue not configured');
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}
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$driver = self::getDriver($driver_name);
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if (!$driver)
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{
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throw new Exceptions\FeatureDisabled('Queue not configured');
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}
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return $driver->addTask($handler, $args, $options);
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}
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/**
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* Get the first task to execute immediately.
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*
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* If no tasks are pending, this method will return null.
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* Detailed scheduling of tasks will be handled by each driver.
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*
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* @param int $blocking
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* @return ?object
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*/
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public static function getTask(int $blocking = 0): ?object
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{
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$driver_name = config('queue.driver');
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if (!$driver_name)
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{
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throw new Exceptions\FeatureDisabled('Queue not configured');
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}
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$driver = self::getDriver($driver_name);
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if (!$driver)
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{
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throw new Exceptions\FeatureDisabled('Queue not configured');
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}
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return $driver->getTask($blocking);
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}
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/**
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* Check the process key.
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*
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* @param string $key
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* @return bool
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*/
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public static function checkKey(string $key): bool
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{
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return config('queue.key') === $key;
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}
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/**
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* Process the queue.
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*
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* This will usually be called by a separate script, run every minute
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* through an external scheduler such as crontab or systemd.
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*
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* If you are on a shared hosting service, you may also call a URL
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* using a "web cron" service provider.
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*
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* @param int $timeout
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* @return void
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*/
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public static function process(int $timeout): void
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{
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// Increase the time limit. This may or may not work.
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set_time_limit(min(60, $timeout));
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// This part will run in a loop until timeout.
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$process_start_time = microtime(true);
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while (true)
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{
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// Get a task from the driver.
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$loop_start_time = microtime(true);
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$task = self::getTask(1);
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// Wait 1 second and loop back.
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if ($task)
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{
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// Find the handler for the task.
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$task->handler = trim($task->handler, '\\()');
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$handler = null;
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try
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{
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if (preg_match('/^(?:\\\\)?([\\\\\\w]+)::(\\w+)$/', $task->handler, $matches))
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{
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$class_name = '\\' . $matches[1];
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$method_name = $matches[2];
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if (class_exists($class_name) && method_exists($class_name, $method_name))
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{
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$handler = [$class_name, $method_name];
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}
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else
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{
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error_log('RxQueue: task handler not found: ' . $task->handler);
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}
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}
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elseif (preg_match('/^(?:\\\\)?([\\\\\\w]+)::(\\w+)(?:\(\))?->(\\w+)$/', $task->handler, $matches))
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{
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$class_name = '\\' . $matches[1];
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$initializer_name = $matches[2];
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$method_name = $matches[3];
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if (class_exists($class_name) && method_exists($class_name, $initializer_name))
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{
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$obj = $class_name::$initializer_name();
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if (method_exists($obj, $method_name))
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{
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$handler = [$obj, $method_name];
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}
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else
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{
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error_log('RxQueue: task handler not found: ' . $task->handler);
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}
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}
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else
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{
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error_log('RxQueue: task handler not found: ' . $task->handler);
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}
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}
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elseif (preg_match('/^new (?:\\\\)?([\\\\\\w]+)(?:\(\))?->(\\w+)$/', $task->handler, $matches))
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{
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$class_name = '\\' . $matches[1];
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$method_name = $matches[2];
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if (class_exists($class_name) && method_exists($class_name, $method_name))
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{
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$obj = new $class_name();
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$handler = [$obj, $method_name];
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}
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else
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{
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error_log('RxQueue: task handler not found: ' . $task->handler);
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}
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}
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else
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{
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if (function_exists('\\' . $task->handler))
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{
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$handler = '\\' . $task->handler;
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}
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else
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{
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error_log('RxQueue: task handler not found: ' . $task->handler);
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}
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}
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}
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catch (\Throwable $th)
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{
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error_log(vsprintf('RxQueue: task handler %s could not be accessed: %s in %s:%d', [
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$task->handler,
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get_class($th),
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$th->getFile(),
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$th->getLine(),
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]));
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}
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// Call the handler.
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try
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{
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if ($handler)
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{
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call_user_func($handler, $task->args, $task->options);
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}
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}
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catch (\Throwable $th)
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{
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error_log(vsprintf('RxQueue: task handler %s threw %s in %s:%d', [
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$task->handler,
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get_class($th),
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$th->getFile(),
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$th->getLine(),
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]));
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}
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}
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// If the timeout is imminent, break the loop.
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$process_elapsed_time = microtime(true) - $process_start_time;
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if ($process_elapsed_time > $timeout - 2)
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{
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break;
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}
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// If there was no task, wait 1 second to make sure that the loop isn't too tight.
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$loop_elapsed_time = microtime(true) - $loop_start_time;
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if (!$task && $loop_elapsed_time < 1)
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{
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usleep(intval((1 - $loop_elapsed_time) * 1000000));
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}
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}
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}
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}
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