| /** |
| * 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 java.io.IOException; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.hdfs.test.system.NNProtocol; |
| import org.apache.hadoop.security.UserGroupInformation; |
| import org.apache.hadoop.test.system.DaemonProtocol; |
| |
| public privileged aspect NameNodeAspect { |
| declare parents : NameNode implements NNProtocol; |
| |
| // Namename doesn't store a copy of its configuration |
| // because it can be changed through the life cycle of the object |
| // So, the an exposed reference needs to be added and updated after |
| // new NameNode(Configuration conf) is complete |
| Configuration NameNode.configRef = null; |
| |
| // Method simply assign a reference to the NameNode configuration object |
| void NameNode.setRef (Configuration conf) { |
| if (configRef == null) |
| configRef = conf; |
| } |
| |
| public Configuration NameNode.getDaemonConf() { |
| return configRef; |
| } |
| |
| pointcut nnConstructorPointcut(Configuration conf) : |
| call(NameNode.new(Configuration)) && args(conf); |
| |
| after(Configuration conf) returning (NameNode namenode): |
| nnConstructorPointcut(conf) { |
| try { |
| UserGroupInformation ugi = UserGroupInformation.getCurrentUser(); |
| namenode.setUser(ugi.getShortUserName()); |
| } catch (IOException e) { |
| namenode.LOG.warn("Unable to get the user information for the " + |
| "Jobtracker"); |
| } |
| namenode.setRef(conf); |
| namenode.setReady(true); |
| } |
| |
| pointcut getVersionAspect(String protocol, long clientVersion) : |
| execution(public long NameNode.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(NNProtocol.class.getName())) { |
| return NNProtocol.versionID; |
| } else { |
| return proceed(protocol, clientVersion); |
| } |
| } |
| } |