org.apache.hadoop.hdfs.server.namenode.DfsServlet Maven / Gradle / Ivy
/**
* 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.namenode;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import java.io.IOException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hdfs.server.common.JspHelper;
import org.apache.hadoop.security.UserGroupInformation;
/**
* A base class for the servlets in DFS.
*/
public abstract class DfsServlet extends HttpServlet {
/** For java.io.Serializable */
private static final long serialVersionUID = 1L;
static final Logger LOG =
LoggerFactory.getLogger(DfsServlet.class.getCanonicalName());
protected UserGroupInformation getUGI(HttpServletRequest request,
Configuration conf) throws IOException {
return JspHelper.getUGI(getServletContext(), request, conf);
}
}