用PHP写的基于Memcache的Queue实现代码

<?php 
class MQ{ 
public static $client; 
private static $m_real; 
private static $m_front; 
private static $m_data = array(); 
const QUEUE_MAX_NUM = 100000000; 
const QUEUE_FRONT_KEY = '_queue_item_front'; 
const QUEUE_REAL_KEY = '_queue_item_real'; 
public static function setupMq($conf) { 
self::$client = memcache_pconnect($conf); 
self::$m_real = memcache_get(self::$client, self::QUEUE_REAL_KEY); 
self::$m_front = memcache_get(self::$client, self::QUEUE_FRONT_KEY); 
if (!isset(self::$m_real) || emptyempty(self::$m_real)) { 
self::$real= 0; 
} 
if (!isset(self::$m_front) || emptyempty(self::$m_front)) { 
self::$m_front = 0; 
} 
return self::$client; 
} 
public static function add($queue, $data) { 
$result = false; 
if (self::$m_real < self::QUEUE_MAX_NUM) { 
if (memcache_add(self::$client, $queue.self::$m_real, $data)) { 
self::mqRealChange(); 
$result = true; 
} 
} 
return $result; 
} 
public static function get($key, $count) { 
$num = 0; 
for ($i=self::$m_front;$i<self::$m_front + $count;$i++) { 
if ($dataTmp = memcache_get(self::$client, $key.$i)) { 
self::$m_data[] = $dataTmp; 
memcache_delete(self::$client, $key.$i); 
$num++; 
} 
} 
if ($num>0) { 
self::mqFrontChange($num); 
} 
return self::$m_data; 
} 
private static function mqRealChange() { 
memcache_add(self::$client, self::QUEUE_REAL_KEY, 0); 
self::$m_real = memcache_increment(self::$client, self::QUEUE_REAL_KEY, 1); 
} 
private static function mqFrontChange($num) { 
memcache_add(self::$client, self::QUEUE_FRONT_KEY, 0); 
self::$m_front = memcache_increment(self::$client, self::QUEUE_FRONT_KEY, $num); 
} 
public static function mflush($memcache_obj) { 
memcache_flush($memcache_obj); 
} 
public static function Debug() { 
echo 'real:'.self::$m_real."<br>/r/n"; 
echo 'front:'.self::$m_front."<br>/r/n"; 
echo 'wait for process data:'.intval(self::$m_real - self::$m_front); 
echo "<br>/r/n"; 
echo '<pre>'; 
print_r(self::$m_data); 
echo '<pre>'; 
} 
} 
define('FLUSH_MQ',0);//CLEAN ALL DATA 
define('IS_ADD',0);//SET DATA 
$mobj = MQ::setupMq('127.0.0.1','11211'); 
if (FLUSH_MQ) { 
MQ::mflush($mobj); 
} else { 
if (IS_ADD) { 
MQ::add('user_sync', '1test'); 
MQ::add('user_sync', '2test'); 
MQ::add('user_sync', '3test'); 
MQ::add('user_sync', '4test'); 
MQ::add('user_sync', '5test'); 
MQ::add('user_sync', '6test'); 
} else { 
MQ::get('user_sync', 10); 
} 
} 
MQ::Debug(); 
?>

MQ::setupMq('127.0.0.1','11211');//连接 
MQ::add($key, $value);//添加数据到队列 
MQ::add($key, $value);//添加数据到队列 
MQ::add($key, $value);//添加数据到队列 
MQ::add($key, $value);//添加数据到队列 
MQ::add($key, $value);//添加数据到队列 
MQ::add($key, $value);//添加数据到队列 
MQ:get($key, 10);//取出一定数量的数据