/**
* @return APF_DB_Factory
*/
public static function &get_instance()
{
if (!self::$instance) {
self::$instance = new MPF_DB_Factory();
}
return self::$instance;
}
/**
* 框架真正的主方法。依次执行各个拦截器的before方法、控制器方法、拦截器逆序after方法，
* 以及页面方法。最后做清理工作。
*/
public function dispatch()
{
$class = $this->router->mapping();
$controller = $this->get_controller($class);
if (!$controller) {
return false;
}
$this->current_controller = $controller;
$interceptores = @$this->get_config($class, "interceptor");
if ($interceptores) {
$interceptor_classes = $this->get_interceptor_classes($class);
} else {
$basic_class = $controller->get_interceptor_index_name();
$interceptor_classes = $this->get_interceptor_classes($basic_class);
}
$step = MPF_Interceptor::STEP_CONTINUE;
foreach ($interceptor_classes as $interceptor_class) {
$interceptor = $this->load_interceptor($interceptor_class);
if (!$interceptor) {
continue;
}
$interceptors[] = $interceptor;
$this->debug("interceptor::before(): " . get_class($interceptor));
$step = $interceptor->before();
if ($step != MPF_Interceptor::STEP_CONTINUE) {
break;
}
}
if (!$this->is_debug_enabled()) {
unset($this->debug_config);
$this->trace_config = false;
}
if ($step != MPF_Interceptor::STEP_EXIT) {
while (true) {
$this->debug("controller::handle_request(): " . get_class($controller));
$this->benchmark_begin("controller::handle_request(): " . get_class($controller));
// 标记控制器执行开始
$this->pf_benchmark_begin("controller");
$result = $controller->handle_request();
// 标记控制器执行结束
$this->pf_benchmark_end("controller");
$this->benchmark_end("controller::handle_request(): " . get_class($controller));
if ($result instanceof MPF_Controller) {
$controller = $result;
continue;
}
break;
}
if (is_string($result)) {
if (class_exists('MPF_DB_Factory', false)) {
MPF_DB_Factory::get_instance()->close_pdo_all();
}
// 标记页面开始
$this->pf_benchmark_begin("page");
$this->page($result);
// 标记页面结束
$this->pf_benchmark_end("page");
}
}
$step = MPF_Interceptor::STEP_CONTINUE;
if (isset($interceptors)) {
$interceptors = array_reverse($interceptors);
foreach ($interceptors as $interceptor) {
$step = $interceptor->after();
$this->debug("interceptor::after(): " . get_class($interceptor));
if ($step != MPF_Interceptor::STEP_CONTINUE) {
break;
}
}
}
return true;
}
protected function get_connection($con_name)
{
if (array_key_exists($con_name, self::$connections)) {
return self::$connections[$con_name];
}
mpf_require_class("MPF_DB_Factory");
$con = MPF_DB_Factory::get_instance()->get_pdo($con_name);
if (self::$auto_commit === false) {
$con->beginTransaction();
}
self::$connections[$con_name] = $con;
return $con;
}