Application 类中设置路径的方法和调用ServiceLocator（服务定位器）加载运行时的组件的方法注释：
/**
* Handles the specified request.
* 处理指定的请求--抽象方法
* This method should return an instance of [[Response]] or its child class
* which represents the handling result of the request.
* 该方法应该返回一个[[Response]]实例，或者它的子类代表处理请求的结果
*
* @param Request $request the request to be handled
* @return Response the resulting response
*/
abstract public function handleRequest($request);
private $_runtimePath;
/**
* Returns the directory that stores runtime files.
* 返回存储运行时文件的路径
* @return string the directory that stores runtime files.
* Defaults to the "runtime" subdirectory under [[basePath]].
* 默认返回[[basePath]]下的 "runtime"目录
*/
public function getRuntimePath()
{
if ($this->_runtimePath === null) {
$this->setRuntimePath($this->getBasePath() . DIRECTORY_SEPARATOR . 'runtime');
}
return $this->_runtimePath;
}
/**
* Sets the directory that stores runtime files.
* 设置存储运行时文件的路径
* @param string $path the directory that stores runtime files.
*/
public function setRuntimePath($path)
{
$this->_runtimePath = Yii::getAlias($path);
Yii::setAlias('@runtime', $this->_runtimePath);
}
private $_vendorPath;
/**
* Returns the directory that stores vendor files.
* 返回插件目录路径
* @return string the directory that stores vendor files.
* Defaults to "vendor" directory under [[basePath]].
* 默认返回[[basePath]]下的 "vendor" 目录
*/
public function getVendorPath()
{
if ($this->_vendorPath === null) {
$this->setVendorPath($this->getBasePath() . DIRECTORY_SEPARATOR . 'vendor');
}
return $this->_vendorPath;
}
/**
* Sets the directory that stores vendor files.
* 设置插件目录路径，并设置别名
* @param string $path the directory that stores vendor files.
*/
public function setVendorPath($path)
{
$this->_vendorPath = Yii::getAlias($path);
Yii::setAlias('@vendor', $this->_vendorPath);
Yii::setAlias('@bower', $this->_vendorPath . DIRECTORY_SEPARATOR . 'bower');
Yii::setAlias('@npm', $this->_vendorPath . DIRECTORY_SEPARATOR . 'npm');
}
/**
* Returns the time zone used by this application.
* 取得时区
* This is a simple wrapper of PHP function date_default_timezone_get().
* If time zone is not configured in php.ini or application config,
* it will be set to UTC by default.
* @return string the time zone used by this application.
* @see http://php.net/manual/en/function.date-default-timezone-get.php
*/
public function getTimeZone()
{
return date_default_timezone_get();
}
/**
* Sets the time zone used by this application.
* 设置时区
* This is a simple wrapper of PHP function date_default_timezone_set().
* Refer to the [php manual](http://www.php.net/manual/en/timezones.php) for available timezones.
* @param string $value the time zone used by this application.
* @see http://php.net/manual/en/function.date-default-timezone-set.php
*/
public function setTimeZone($value)
{
date_default_timezone_set($value);
}
/**
* Returns the database connection component.
* 返回数据库连接组件
* @return \yii\db\Connection the database connection.
*/
public function getDb()
{
return $this->get('db');
}
/**
* Returns the log dispatcher component.
* 返回日志调度组件
* @return \yii\log\Dispatcher the log dispatcher application component.
*/
public function getLog()
{
return $this->get('log');
}
/**
* Returns the error handler component.
* 返回错误处理组件
* @return \yii\web\ErrorHandler|\yii\console\ErrorHandler the error handler application component.
*/
public function getErrorHandler()
{
return $this->get('errorHandler');
}
/**
* Returns the cache component.
* 返回缓存组件
* @return \yii\caching\Cache the cache application component. Null if the component is not enabled.
*/
public function getCache()
{
return $this->get('cache', false);
}
/**
* Returns the formatter component.
* 返回格式化程序组件
* @return \yii\i18n\Formatter the formatter application component.
*/
public function getFormatter()
{
return $this->get('formatter');
}
/**
* Returns the request component.
* 返回请求的组件对象
* @return \yii\web\Request|\yii\console\Request the request component.
*/
public function getRequest()
{
return $this->get('request');
}
/**
* Returns the response component.
* 返回响应组件
* @return \yii\web\Response|\yii\console\Response the response component.
*/
public function getResponse()
{
return $this->get('response');
}
/**
* Returns the view object.
* 返回视图对象
* @return View|\yii\web\View the view application component that is used to render various view files.
*/
public function getView()
{
return $this->get('view');
}
/**
* Returns the URL manager for this application.
* 返回当前应用的URL管理组件
* @return \yii\web\UrlManager the URL manager for this application.
*/
public function getUrlManager()
{
return $this->get('urlManager');
}
/**
* Returns the internationalization (i18n) component
* 返回国际化组件
* @return \yii\i18n\I18N the internationalization application component.
*/
public function getI18n()
{
return $this->get('i18n');
}
/**
* Returns the mailer component.
* 返回邮件组件
* @return \yii\mail\MailerInterface the mailer application component.
*/
public function getMailer()
{
return $this->get('mailer');
}
/**
* Returns the auth manager for this application.
* 返回该应用的权限管理组件
* @return \yii\rbac\ManagerInterface the auth manager application component.
* Null is returned if auth manager is not configured.
*/
public function getAuthManager()
{
return $this->get('authManager', false);
}
/**
* Returns the asset manager.
* 返回资源管理组件
* @return \yii\web\AssetManager the asset manager application component.
*/
public function getAssetManager()
{
return $this->get('assetManager');
}
/**
* Returns the security component.
* 返回安全组件
* @return \yii\base\Security the security application component.
*/
public function getSecurity()
{
return $this->get('security');
}
/**
* Returns the configuration of core application components.
* 返回核心组件的配置
* @see set()
*/
public function coreComponents()
{
return [
'log' => ['class' => 'yii\log\Dispatcher'],
'view' => ['class' => 'yii\web\View'],
'formatter' => ['class' => 'yii\i18n\Formatter'],
'i18n' => ['class' => 'yii\i18n\I18N'],
'mailer' => ['class' => 'yii\swiftmailer\Mailer'],
'urlManager' => ['class' => 'yii\web\UrlManager'],
'assetManager' => ['class' => 'yii\web\AssetManager'],
'security' => ['class' => 'yii\base\Security'],
];
}
/**
* Terminates the application.
* 终止应用程序
* This method replaces the `exit()` function by ensuring the application life cycle is completed
* before terminating the application.
* 该方法代替`exit()` 方法确认一个应用的生命周期已经结束
* @param integer $status the exit status (value 0 means normal exit while other values mean abnormal exit).
* @param Response $response the response to be sent. If not set, the default application [[response]] component will be used.
* @throws ExitException if the application is in testing mode
*/
public function end($status = 0, $response = null)
{
if ($this->state === self::STATE_BEFORE_REQUEST || $this->state === self::STATE_HANDLING_REQUEST) {//判断当前状态为请求前或者处理请求
$this->state = self::STATE_AFTER_REQUEST;//则设置应用状态为请求完成后
$this->trigger(self::EVENT_AFTER_REQUEST);//触发afterRequest事件
}
if ($this->state !== self::STATE_SENDING_RESPONSE && $this->state !== self::STATE_END) {//如果应用状态不是发送应答和应用结束
$this->state = self::STATE_END;//设置状态为应用结束
$response = $response ? : $this->getResponse();//
$response->send();//向客户端发送应答
}
if (YII_ENV_TEST) {
throw new ExitException($status);
} else {
exit($status);
}
}