码头:动态删除注册的servlet [英] Jetty : Dynamically removing the registered servlet

问题描述

我使用WebAppContext创建并启动了码头服务器.我还可以使用addServlet方法将servlet添加到WebAppContext中.但我想动态删除此servlet. 我怎样才能做到这一点 ? WebAppContext中未提供诸如removeServlet()之类的东西.

I created and started jetty server with WebAppContext. I can also add servlet to the WebAppContext with addServlet method. But I want to dynamically remove this servlet. How can I do this ? Something like removeServlet() is not provided in the WebAppContext.

推荐答案

您需要手动进行操作(可能应该有一种便捷方法，但没有)

You need to do it manually (there probably should be a convenience method, but there isn't)

在Jetty 7中，它类似于( unested ):

In Jetty 7 it would be something like (untested):

public void removeServlets(WebAppContext webAppContext, Class<?> servlet)
{
   ServletHandler handler = webAppContext.getServletHandler();

   /* A list of all the servlets that don't implement the class 'servlet',
      (i.e. They should be kept in the context */
   List<ServletHolder> servlets = new ArrayList<ServletHolder>();

   /* The names all the servlets that we remove so we can drop the mappings too */
   Set<String> names = new HashSet<String>();

   for( ServletHolder holder : handler.getServlets() )
   {
      /* If it is the class we want to remove, then just keep track of its name */
      if(servlet.isInstance(holder.getServlet()))
      {
          names.add(holder.getName());
      }
      else /* We keep it */
      {
          servlets.add(holder);
      }
   }

   List<ServletMapping> mappings = new ArrayList<ServletMapping>();

   for( ServletMapping mapping : handler.getServletMappings() )
   {
      /* Only keep the mappings that didn't point to one of the servlets we removed */
      if(!names.contains(mapping.getServletName()))
      {
          mappings.add(mapping);
      }
   }

   /* Set the new configuration for the mappings and the servlets */
   handler.setServletMappings( mappings.toArray(new ServletMapping[0]) );
   handler.setServlets( servlets.toArray(new ServletHolder[0]) );

}

这篇关于码头:动态删除注册的servlet的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！