@Override
protected void destory(int arg) {
servletFilterBridgeServiceRegistration.unregister();
// 停止时，保存相关运行时状态到ServletContext中。
WebContext.getServletContext()
.setAttribute(QUICKWEBFRAMEWORK_STATE_FILTERCONFIG, getFilterConfig());
}
@Override
protected void init(int arg) {
BundleContext bundleContext = Activator.getContext();
// 启动时，从ServletContext中读取相关运行时状态
Object filterConfigObject =
WebContext.getServletContext().getAttribute(QUICKWEBFRAMEWORK_STATE_FILTERCONFIG);
if (filterConfigObject != null) setFilterConfig((FilterConfig) filterConfigObject);
// 注册过滤器桥接对象
servletFilterBridgeServiceRegistration =
bundleContext.registerService(
ServletFilterBridge.class.getName(), new ServletFilterBridge(), null);
}