[BEAR] 排他ロックする around アドバイス

Lock.php

<?php
class App_Aspect_Lock implements BEAR_Aspect_Around_Interface{
    public function around(array $values, BEAR_Aspect_JoinPoint $joinPoint){
        $lock = sprintf('%s/tmp/locks/%s', _BEAR_APP_HOME, sha1(serialize($joinPoint->getMethodReflection())));
        if(!file_exists($lock)){
            touch($lock);
        }
        if(file_get_contents($lock)){
            return false;
        }
        file_put_contents($lock, 1);
        $joinPoint->proceed($values);
        file_put_contents($lock, null);
    }
}