ProxyStreamFile.java
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上传日期:2018-01-08
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- /**
- * 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.hdfsproxy;
- import java.io.IOException;
- import java.net.InetSocketAddress;
- import javax.servlet.ServletContext;
- import javax.servlet.http.HttpServletRequest;
- import org.apache.hadoop.hdfs.DFSClient;
- import org.apache.hadoop.hdfs.server.namenode.StreamFile;
- import org.apache.hadoop.security.UnixUserGroupInformation;
- import org.apache.hadoop.conf.Configuration;
- /** {@inheritDoc} */
- public class ProxyStreamFile extends StreamFile {
- /** For java.io.Serializable */
- private static final long serialVersionUID = 1L;
- /** {@inheritDoc} */
- @Override
- protected DFSClient getDFSClient(HttpServletRequest request)
- throws IOException {
- ServletContext context = getServletContext();
- Configuration conf = new Configuration((Configuration) context
- .getAttribute("name.conf"));
- UnixUserGroupInformation.saveToConf(conf,
- UnixUserGroupInformation.UGI_PROPERTY_NAME, getUGI(request));
- InetSocketAddress nameNodeAddr = (InetSocketAddress) context
- .getAttribute("name.node.address");
- return new DFSClient(nameNodeAddr, conf);
- }
- /** {@inheritDoc} */
- @Override
- protected UnixUserGroupInformation getUGI(HttpServletRequest request) {
- return (UnixUserGroupInformation) request.getAttribute("authorized.ugi");
- }
- }