| /** |
| * 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.datanode; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.util.AbstractList; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.hdfs.test.system.DNProtocol; |
| import org.apache.hadoop.security.UserGroupInformation; |
| import org.apache.hadoop.test.system.DaemonProtocol; |
| import org.apache.hadoop.hdfs.server.datanode.SecureDataNodeStarter.SecureResources; |
| |
| public privileged aspect DataNodeAspect { |
| declare parents : DataNode implements DNProtocol; |
| |
| public Configuration DataNode.getDaemonConf() { |
| return super.getConf(); |
| } |
| |
| pointcut dnConstructorPointcut(Configuration conf, AbstractList<File> dirs, |
| SecureResources resources) : |
| call(DataNode.new(Configuration, AbstractList<File>, SecureResources)) |
| && args(conf, dirs, resources); |
| |
| after(Configuration conf, AbstractList<File> dirs, SecureResources resources) |
| returning (DataNode datanode): |
| dnConstructorPointcut(conf, dirs, resources) { |
| try { |
| UserGroupInformation ugi = UserGroupInformation.getCurrentUser(); |
| datanode.setUser(ugi.getShortUserName()); |
| } catch (IOException e) { |
| datanode.LOG.warn("Unable to get the user information for the " + |
| "DataNode"); |
| } |
| datanode.setReady(true); |
| } |
| |
| pointcut getVersionAspect(String protocol, long clientVersion) : |
| execution(public long DataNode.getProtocolVersion(String , |
| long) throws IOException) && args(protocol, clientVersion); |
| |
| long around(String protocol, long clientVersion) : |
| getVersionAspect(protocol, clientVersion) { |
| if(protocol.equals(DaemonProtocol.class.getName())) { |
| return DaemonProtocol.versionID; |
| } else if(protocol.equals(DNProtocol.class.getName())) { |
| return DNProtocol.versionID; |
| } else { |
| return proceed(protocol, clientVersion); |
| } |
| } |
| } |