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diff --git a/lib/prado/framework/TApplicationComponent.php b/lib/prado/framework/TApplicationComponent.php
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+<?php
+/**
+ * TApplicationComponent class
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @link https://github.com/pradosoft/prado
+ * @copyright Copyright &copy; 2005-2015 The PRADO Group
+ * @license https://github.com/pradosoft/prado/blob/master/COPYRIGHT
+ * @package System
+ */
+
+/**
+ * TApplicationComponent class
+ *
+ * TApplicationComponent is the base class for all components that are
+ * application-related, such as controls, modules, services, etc.
+ *
+ * TApplicationComponent mainly defines a few properties that are shortcuts
+ * to some commonly used methods. The {@link getApplication Application}
+ * property gives the application instance that this component belongs to;
+ * {@link getService Service} gives the current running service;
+ * {@link getRequest Request}, {@link getResponse Response} and {@link getSession Session}
+ * return the request and response modules, respectively;
+ * And {@link getUser User} gives the current user instance.
+ *
+ * Besides, TApplicationComponent defines two shortcut methods for
+ * publishing private files: {@link publishAsset} and {@link publishFilePath}.
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @package System
+ * @since 3.0
+ */
+class TApplicationComponent extends TComponent
+{
+	/**
+	 * @return TApplication current application instance
+	 */
+	public function getApplication()
+	{
+		return Prado::getApplication();
+	}
+
+	/**
+	 * @return IService the current service
+	 */
+	public function getService()
+	{
+		return Prado::getApplication()->getService();
+	}
+
+	/**
+	 * @return THttpRequest the current user request
+	 */
+	public function getRequest()
+	{
+		return Prado::getApplication()->getRequest();
+	}
+
+	/**
+	 * @return THttpResponse the response
+	 */
+	public function getResponse()
+	{
+		return Prado::getApplication()->getResponse();
+	}
+
+	/**
+	 * @return THttpSession user session
+	 */
+	public function getSession()
+	{
+		return Prado::getApplication()->getSession();
+	}
+
+	/**
+	 * @return IUser information about the current user
+	 */
+	public function getUser()
+	{
+		return Prado::getApplication()->getUser();
+	}
+
+	/**
+	 * Publishes a private asset and gets its URL.
+	 * This method will publish a private asset (file or directory)
+	 * and gets the URL to the asset. Note, if the asset refers to
+	 * a directory, all contents under that directory will be published.
+	 * Also note, it is recommended that you supply a class name as the second
+	 * parameter to the method (e.g. publishAsset($assetPath,__CLASS__) ).
+	 * By doing so, you avoid the issue that child classes may not work properly
+	 * because the asset path will be relative to the directory containing the child class file.
+	 *
+	 * @param string path of the asset that is relative to the directory containing the specified class file.
+	 * @param string name of the class whose containing directory will be prepend to the asset path. If null, it means get_class($this).
+	 * @return string URL to the asset path.
+	 */
+	public function publishAsset($assetPath,$className=null)
+	{
+		if($className===null)
+			$className=get_class($this);
+		$class=new ReflectionClass($className);
+		$fullPath=dirname($class->getFileName()).DIRECTORY_SEPARATOR.$assetPath;
+		return $this->publishFilePath($fullPath);
+	}
+
+	/**
+	 * Publishes a file or directory and returns its URL.
+	 * @param string absolute path of the file or directory to be published
+	 * @return string URL to the published file or directory
+	 */
+	public function publishFilePath($fullPath, $checkTimestamp=false)
+	{
+		return Prado::getApplication()->getAssetManager()->publishFilePath($fullPath, $checkTimestamp);
+	}
+}
+