| /** |
| * 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 org.apache.hadoop.hdfs.server.federation.router; |
| |
| import java.io.IOException; |
| import java.io.PrintWriter; |
| import java.net.HttpURLConnection; |
| import java.net.InetAddress; |
| import java.security.PrivilegedExceptionAction; |
| import java.util.Map; |
| |
| import javax.servlet.ServletContext; |
| import javax.servlet.http.HttpServletRequest; |
| import javax.servlet.http.HttpServletResponse; |
| |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.hdfs.server.namenode.DfsServlet; |
| import org.apache.hadoop.security.UserGroupInformation; |
| |
| /** |
| * This class is used in Namesystem's web server to do fsck on namenode. |
| */ |
| @InterfaceAudience.Private |
| public class RouterFsckServlet extends DfsServlet { |
| /** for java.io.Serializable. */ |
| private static final long serialVersionUID = 1L; |
| |
| public static final String SERVLET_NAME = "fsck"; |
| public static final String PATH_SPEC = "/fsck"; |
| |
| /** Handle fsck request. */ |
| @Override |
| public void doGet(HttpServletRequest request, HttpServletResponse response) |
| throws IOException { |
| final Map<String, String[]> pmap = request.getParameterMap(); |
| final PrintWriter out = response.getWriter(); |
| final InetAddress remoteAddress = |
| InetAddress.getByName(request.getRemoteAddr()); |
| final ServletContext context = getServletContext(); |
| final Configuration conf = RouterHttpServer.getConfFromContext(context); |
| final UserGroupInformation ugi = getUGI(request, conf); |
| try { |
| ugi.doAs((PrivilegedExceptionAction<Object>) () -> { |
| Router router = RouterHttpServer.getRouterFromContext(context); |
| new RouterFsck(router, pmap, out, remoteAddress).fsck(); |
| return null; |
| }); |
| } catch (InterruptedException e) { |
| response.sendError(HttpURLConnection.HTTP_BAD_REQUEST, e.getMessage()); |
| } |
| } |
| |
| } |