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ZeedFramework/library/Zeed/Task/Locker/File.php

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+<?php
+/**
+ * Zeed Platform Project
+ * Based on Zeed Framework & Zend Framework.
+ *
+ * BTS - Billing Transaction Service
+ * CAS - Central Authentication Service
+ *
+ * LICENSE
+ * http://www.zeed.com.cn/license/
+ *
+ * @category   Zeed
+ * @package    Zeed_ChangeMe
+ * @subpackage ChangeMe
+ * @copyright  Copyright (c) 2010 Zeed Technologies PRC Inc. (http://www.zeed.com.cn)
+ * @author     Zeed Team (http://blog.zeed.com.cn)
+ * @since      2010-8-3
+ * @version    SVN: $Id$
+ */
+
+class Zeed_Task_Locker_File extends Zeed_Task_Locker_Abstract
+{
+    /*
+     *
+     * @var filename 锁定文件路径
+     */
+    protected $_specificOptions = array(
+            'filename' => null);
+
+    private $_filename = null;
+    private $_fp = null;
+    private $_already_running = false;
+
+    /**
+     * 锁定
+     *
+     * @return string|false 成功返回文件路径
+     */
+    public function lock()
+    {
+        $this->_filename = $this->_specificOptions['filename'];
+
+        if (null === $this->_filename) {
+            $this->_filename = ZEED_PATH_DATA . '/tmp/Zeed.Task.Locker.pid';
+        } else {
+            $this->_filename = ZEED_PATH_DATA . '/tmp/' . $this->_filename . '.pid';
+        }
+
+        $this->_fp = fopen($this->_filename, 'w+');
+        fwrite($this->_fp, getmypid());
+        if (! flock($this->_fp, LOCK_EX + LOCK_NB)) {
+            $this->_already_running = true;
+            fclose($this->_fp);
+            return false;
+        } else {
+            return $this->_filename;
+        }
+    }
+
+    /**
+     * 释放文件锁定
+     *
+     * @return boolean
+     */
+    public function unlock()
+    {
+        if (! $this->_already_running) {
+            flock($this->_fp, LOCK_UN);
+            fclose($this->_fp);
+            unlink($this->_filename);
+        }
+
+        return true;
+    }
+}
+
+// End ^ Native EOL ^ encoding