content: /**
   *
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance
   * with the License.  You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package com.alibaba.wasp.fserver;
  
  import com.alibaba.wasp.tmpl.fserver.FSStatusTmpl;
  import org.apache.hadoop.classification.InterfaceAudience;
  
  import javax.servlet.ServletException;
  import javax.servlet.http.HttpServlet;
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  import java.io.IOException;
  
  @InterfaceAudience.Private
  public class FSStatusServlet extends HttpServlet {
    private static final long serialVersionUID = 1L;
  
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp)
        throws ServletException, IOException
      {
      FServer fs = (FServer)getServletContext().getAttribute(
          FServer.FSERVER);
      assert fs != null : "No fs in context!";
      
      resp.setContentType("text/html");
      FSStatusTmpl tmpl = new FSStatusTmpl();
      if (req.getParameter("format") != null)
        tmpl.setFormat(req.getParameter("format"));
      if (req.getParameter("filter") != null)
        tmpl.setFilter(req.getParameter("filter"));
      tmpl.render(resp.getWriter(), fs);
    }
  }