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<?php
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/**
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*
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* Background Job Library Function Require for Background job
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*
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* @category PHP
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* @package SocialManager
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* @author Kishan Jasani <[email protected]>
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* @license https://github.com/kishanjasani/SociaManager
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*
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*/
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class LibGearman {
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public $gearman_host = array();
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public $gearman_port = array();
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public $errors = array();
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public $client = null;
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public $worker = null;
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public $priority = array('high', 'low', 'normal');
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/**
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* Constructor
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*
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* @access public
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* @return void
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*/
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public function __construct() {
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if (!$this->is_supported()) {
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return false;
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}
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}
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/**
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* Is supported
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*
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* Returns false if Gearman is not supported on the system.
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* If it is, we setup the gearman object & return true
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*/
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public function is_supported() {
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if (!extension_loaded('gearman')) {
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//log_message('error', 'The Gearman Extension must be loaded to use Gearman client.');
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return false;
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}
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return true;
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}
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/**
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* Function to create a gearman client
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*
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* @access public
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* @return void
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*/
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public function gearman_client() {
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$this->client = new GearmanClient();
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$this->_auto_connect($this->client);
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return $this->client;
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}
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/**
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* Function to create a gearman worker
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*
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* @access public
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* @return void
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*/
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public function gearman_worker() {
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$this->worker = new GearmanWorker();
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$this->_auto_connect($this->worker);
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return $this->worker;
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}
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/**
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* get worker or client obj
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*
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* @access public
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* @param string
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* @return object
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*/
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public function current($obj = 'client') {
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return (isset($this->{$obj})) ? $this->{$obj} : false;
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}
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/**
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* Function to assign a function name against an identifier
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*
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* @access public
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* @param string
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* @param string
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* @return void
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*/
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public function add_worker_function($identifier, $function_name) {
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$this->worker->addFunction($identifier, $function_name);
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//log_message('debug', "Gearman Library: Successfully added worker function with identifier $identifier with function $function_name");
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}
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/**
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* Listen for a job
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*
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* @access public
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* @return bool true on sucess, false on failure
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*/
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public function work() {
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return $this->worker->work();
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}
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/**
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* Perform a job in background for a client
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*
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* @access public
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* @param string
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* @param string
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* @param string [high|low]
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* @return void
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*/
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public function do_job_background($function, $param, $priority = 'normal') {
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if (!in_array($priority, $this->priority)) {
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return false;
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}
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$callback_function = ($priority == 'normal') ? 'doBackground' : 'do' . ucfirst($priority) . 'Background';
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$this->client->{$callback_function}($function, $param, md5(uniqid(rand(), true)));
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//log_message('debug', "Gearman Library: Performed task with function $function with parameter $param");
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}
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/**
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* Perform a job in foreground for a client
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*
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* @access public
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* @param string
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* @param string
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* @param string [high|normal|low]
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* @return string
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*/
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public function do_job_foreground($function, $param, $priority = 'normal') {
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if (!in_array($priority, $this->priority)) {
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return false;
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}
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$callback_function = 'do' . ucfirst($priority);
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//log_message('debug', "Gearman Library: Performed task with function $function with parameter $param");
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return $this->client->{$callback_function}($function, $param, md5(uniqid(rand(), true)));
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}
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/**
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* Runs through all of the servers defined in the configuration and attempts to connect to each
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*
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* @param object
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* @return void
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*/
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private function _auto_connect($object) {
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$this->gearman_host = array('127.0.0.1');
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$this->gearman_port = array('4730');
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foreach ($this->gearman_host as $key => $server) {
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if (!$object->addServer($server, $this->gearman_port[$key])) {
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$this->errors[] = "Gearman Library: Could not connect to the server named $key";
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}
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}
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}
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/**
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* Returns worker error
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*
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165
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* @access public
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* @return void
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*
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*/
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public function error() {
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return $this->worker->error();
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}
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}
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