Java / Jetty: How to Add Filter to Embedded Jetty

You are probably looking for EnumSet.of(DispatcherType.REQUEST), included a full example below:

import java.io.IOException;import java.util.EnumSet;import javax.servlet.DispatcherType;import javax.servlet.Filter;import javax.servlet.FilterChain;import javax.servlet.FilterConfig;import javax.servlet.ServletException;import javax.servlet.ServletRequest;import javax.servlet.ServletResponse;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.eclipse.jetty.server.Server;import org.eclipse.jetty.servlet.ServletHandler;public class JettyFilter {  public static void main(final String[] args) throws Exception {    Server server = new Server(8080);    ServletHandler handler = new ServletHandler();    server.setHandler(handler);    handler.addServletWithMapping(HelloServlet.class, "/*");    handler.addFilterWithMapping(HelloPrintingFilter.class, "/*",        EnumSet.of(DispatcherType.REQUEST));    server.start();    server.join();  }  public static class HelloServlet extends HttpServlet {    private static final long serialVersionUID = 1L;    @Override    protected void doGet(HttpServletRequest request, HttpServletResponse response)        throws ServletException, IOException {      response.setContentType("text/html");      response.setStatus(HttpServletResponse.SC_OK);      response.getWriter().println("<h1>Hello SimpleServlet</h1>");    }  }  public static class HelloPrintingFilter implements Filter {    @Override    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)        throws IOException, ServletException {      System.out.print("hello from filter");    }    @Override    public void init(FilterConfig arg0) throws ServletException {    }    @Override    public void destroy() {}  }}