原创文章，转载请注明出处： http://www.huyanping.cn/?p=235
作者： Jenner
System V Message queue 是一种进程通信（IPC）的方式，方便实现生产者-消费者模型，单个或多个生产者向队列中写入消息，多个生产者再从队列中获取消息进行处理。
项目地址：https://github.com/huyanping/Zebra-PHP-Framework
该Wrapper支持：
注意：如果要修改队列最大容量，请确保你的脚本是运行在root下
<?php /** * Created by PhpStorm. * User: huyanping * Date: 14-8-9 * Time: 上午3:44 * * System V message queue IPC通信消息队列封装 * 如果你想修改一个队列最大能够存储的字节数，请确认你的脚本具有root权限 */class SystemVMessageQueue implements IMessageQueue{ //消息分组类型，用于将一个消息队列中的信息进行分组 private $msg_type; //队列标志 private $queue; //是否序列化 private $serialize_needed; //无法写入队列时，是否阻塞 private $block_send; //设置位MSG_IPC_NOWAIT，如果无法获取到一个消息，则不等待；如果设置位NULL，则会等待消息到来 private $option_receive; //希望接收到的最大消息大小 private $maxsize; //IPC通信KEY private $key_t; /** * @param $ipc_filename IPC通信标志文件，用于获取唯一IPC KEY * @param $msg_type 消息类型 * @param bool $serialize_needed 是否序列化 * @param bool $block_send 无法写入队列时，是否阻塞 * @param int $option_receive 设置位MSG_IPC_NOWAIT，如果无法获取到一个消息，则不等待；如果设置位NULL，则会等待消息到来 * @param int $maxsize 希望接收到的最大消息 */ public function __construct($msg_type, $ipc_filename = __FILE__, $serialize_needed = true, $block_send = false, $option_receive = MSG_IPC_NOWAIT, $maxsize = 100000) { $this->msg_type = $msg_type; $this->serialize_needed = $serialize_needed; $this->block_send = $block_send; $this->option_receive = $option_receive; $this->maxsize = $maxsize; $this->init_queue($ipc_filename, $msg_type); } /** * 初始化一个队列 * @param $ipc_filename * @param $msg_type * @throws Exception */ public function init_queue($ipc_filename, $msg_type) { $this->key_t = $this->get_ipc_key($ipc_filename, $msg_type); $this->queue = msg_get_queue($this->key_t); if (!$this->queue) throw new Exception('msg_get_queue failed'); } /** * @param $ipc_filename * @param $msg_type * @return int * @throws Exception */ public function get_ipc_key($ipc_filename, $msg_type) { $key_t = ftok($ipc_filename, $msg_type); if ($key_t == 0) throw new Exception('ftok error'); return $key_t; } /** * 从队列获取一个 * @return bool * @throws Exception */ public function get() { $queue_status = $this->status(); if ($queue_status['msg_qnum'] > 0) { if (msg_receive($this->queue, $this->msg_type, $msgtype_erhalten, $this->maxsize, $data, $this->serialize_needed, $this->option_receive, $err) === true) { return $data; } else { throw new Exception($err); } } else { return false; } } /** * 写入队列 * @param $message * @throws Exception */ public function put($message) { if (!msg_send($this->queue, $this->msg_type, $message, $this->serialize_needed, $this->block_send, $err) === true) { throw new Exception($err); } return true; } /* * 返回值数组下标如下： * msg_perm.uid The uid of the owner of the queue. 用户ID * msg_perm.gid The gid of the owner of the queue. 用户组ID * msg_perm.mode The file access mode of the queue. 访问模式 * msg_stime The time that the last message was sent to the queue. 最后一次队列写入时间 * msg_rtime The time that the last message was received from the queue. 最后一次队列接收时间 * msg_ctime The time that the queue was last changed. 最后一次修改时间 * msg_qnum The number of messages waiting to be read from the queue. 当前等待被读取的队列数量 * msg_qbytes The maximum number of bytes allowed in one message queue. 一个消息队列中允许接收的最大消息总大小 * On Linux, this value may be read and modified via /proc/sys/kernel/msgmnb. * msg_lspid The pid of the process that sent the last message to the queue. 最后发送消息的进程ID * msg_lrpid The pid of the process that received the last message from the queue. 最后接收消息的进程ID * * @return array */ public function status() { $queue_status = msg_stat_queue($this->queue); return $queue_status; } /** * 获取队列当前堆积状态 * @return mixed */ public function size() { $status = $this->status(); return $status['msg_qnum']; } /** * allows you to change the values of the msg_perm.uid, * msg_perm.gid, msg_perm.mode and msg_qbytes fields of the underlying message queue data structure * 可以用来修改队列运行接收的最大读取的数据 * * @param $key 状态下标 * @param $value 状态值 * @return bool */ public function set_status($key, $value) { $this->check_set_privilege($key); if ($key == 'msg_qbytes') return $this->set_max_queue_size($value); $queue_status[$key] = $value; return msg_set_queue($this->queue, $queue_status); } /** * 删除一个队列 * @return bool */ public function queue_remove() { return msg_remove_queue($this->queue); } //修改队列能容纳的最大字节数，需要root权限 /** * @param $size * @return bool * @throws Exception */ public function set_max_queue_size($size) { $user = get_current_user(); if ($user !== 'root') throw new Exception('changing msg_qbytes needs root privileges'); return $this->set_status('msg_qbytes', $size); } /** * 判断一个队列是否存在 * @param $key * @return bool */ public function queue_exists($key) { return msg_queue_exists($key); } /** * 检查修改队列状态的权限 * @param $key * @throws Exception */ private function check_set_privilege($key) { $privilege_field = array('msg_perm.uid', 'msg_perm.gid', 'msg_perm.mode'); if (!in_array($key, $privilege_field)) { throw new Exception('you can only change msg_perm.uid, msg_perm.gid, msg_perm.mode and msg_qbytes. And msg_qbytes needs root privileges'); } }} 调用方式如下：
写入队列：
<?php /** * Created by PhpStorm. * User: huyanping * Date: 14-8-22 * Time: 下午12:13 */define('TEST_ROOT', dirname(__FILE__));require TEST_ROOT . '/../core/IMessageQueue.interface.php';require TEST_ROOT . '/../core/SystemVMessageQueue.class.php';try{ $messageQueue = new SystemVMessageQueue(1, dirname(__FILE__)); while(true){ var_dump($messageQueue->put(mt_rand(0, 1000))); echo $messageQueue->size() . PHP_EOL; sleep(1); }}catch(Exception $e){ echo $e->getMessage();}
<?php /** * Created by PhpStorm. * User: huyanping * Date: 14-8-22 * Time: 下午12:13 */define('TEST_ROOT', dirname(__FILE__));require TEST_ROOT . '/../core/IMessageQueue.interface.php';require TEST_ROOT . '/../core/SystemVMessageQueue.class.php';try{ $messageQueue = new SystemVMessageQueue(1, dirname(__FILE__)); while(true){ var_dump($messageQueue->get()); sleep(1); }}catch(Exception $e){ echo $e->getMessage();}
<?php /** * Created by PhpStorm. * User: Administrator * Date: 14-8-22 * Time: 下午2:35 */define('TEST_ROOT', dirname(__FILE__));require TEST_ROOT . '/../core/IMessageQueue.interface.php';require TEST_ROOT . '/../core/SystemVMessageQueue.class.php';try{ $messageQueue = new SystemVMessageQueue(1, dirname(__FILE__)); var_dump($messageQueue->queue_remove());}catch(Exception $e){ echo $e->getMessage();}
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