import io.undertow.server.handlers.resource.ResourceChangeListener; //导入依赖的package包/类
public synchronized void start() throws ServletException {
    try {
        handle = factory.createInstance();
    } catch (Exception e) {
        throw UndertowServletMessages.MESSAGES.couldNotInstantiateComponent(servletInfo.getName(), e);
    }
    instance = handle.getInstance();
    new LifecyleInterceptorInvocation(servletContext.getDeployment().getDeploymentInfo().getLifecycleInterceptors(), servletInfo, instance, new ServletConfigImpl(servletInfo, servletContext)).proceed();

    //if a servlet implements FileChangeCallback it will be notified of file change events
    final ResourceManager resourceManager = servletContext.getDeployment().getDeploymentInfo().getResourceManager();
    if(instance instanceof ResourceChangeListener && resourceManager.isResourceChangeListenerSupported()) {
        resourceManager.registerResourceChangeListener(changeListener = (ResourceChangeListener) instance);
    }
}
 

import io.undertow.server.handlers.resource.ResourceChangeListener; //导入依赖的package包/类
public UndertowJS stop() {
    for (Map.Entry<ResourceSet, ResourceChangeListener> entry : listeners.entrySet()) {
        entry.getKey().getResourceManager().removeResourceChangeListener(entry.getValue());
    }
    listeners.clear();
    for (TemplateProvider templateProvider : templateProviders.values()) {
        templateProvider.cleanup();
    }
    engine = null;
    return this;
}
 

import io.undertow.server.handlers.resource.ResourceChangeListener; //导入依赖的package包/类
@Override
public void registerResourceChangeListener(ResourceChangeListener listener) {
	throw UndertowMessages.MESSAGES.resourceChangeListenerNotSupported();

}
 

import io.undertow.server.handlers.resource.ResourceChangeListener; //导入依赖的package包/类
@Override
public void removeResourceChangeListener(ResourceChangeListener listener) {
	throw UndertowMessages.MESSAGES.resourceChangeListenerNotSupported();
}
 

import io.undertow.server.handlers.resource.ResourceChangeListener; //导入依赖的package包/类
@Override
public void registerResourceChangeListener(ResourceChangeListener listener) {

}
 

import io.undertow.server.handlers.resource.ResourceChangeListener; //导入依赖的package包/类
@Override
public void removeResourceChangeListener(ResourceChangeListener listener) {

}