AbstractController.java 文件源码

public ModelAndView handleRenderRequest(RenderRequest request, RenderResponse response) throws Exception {
    // If the portlet is minimized and we don't want to render then return null.
    if (WindowState.MINIMIZED.equals(request.getWindowState()) && !this.renderWhenMinimized) {
        return null;
    }

    // Delegate to PortletContentGenerator for checking and preparing.
    checkAndPrepare(request, response);

    // Execute in synchronized block if required.
    if (this.synchronizeOnSession) {
        PortletSession session = request.getPortletSession(false);
        if (session != null) {
            Object mutex = PortletUtils.getSessionMutex(session);
            synchronized (mutex) {
                return handleRenderRequestInternal(request, response);
            }
        }
    }

    return handleRenderRequestInternal(request, response);
}