| /** |
| * 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.yarn.server.router.clientrm; |
| |
| import java.io.IOException; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.security.UserGroupInformation; |
| import org.apache.hadoop.yarn.exceptions.YarnRuntimeException; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Implements the {@link ClientRequestInterceptor} interface and provides common |
| * functionality which can can be used and/or extended by other concrete |
| * intercepter classes. |
| * |
| */ |
| public abstract class AbstractClientRequestInterceptor |
| implements ClientRequestInterceptor { |
| |
| private static final Logger LOG = |
| LoggerFactory.getLogger(AbstractClientRequestInterceptor.class); |
| |
| private Configuration conf; |
| private ClientRequestInterceptor nextInterceptor; |
| |
| @SuppressWarnings("checkstyle:visibilitymodifier") |
| protected UserGroupInformation user = null; |
| |
| /** |
| * Sets the {@link ClientRequestInterceptor} in the chain. |
| */ |
| @Override |
| public void setNextInterceptor(ClientRequestInterceptor nextInterceptor) { |
| this.nextInterceptor = nextInterceptor; |
| } |
| |
| /** |
| * Sets the {@link Configuration}. |
| */ |
| |
| @Override |
| public void setConf(Configuration conf) { |
| this.conf = conf; |
| if (this.nextInterceptor != null) { |
| this.nextInterceptor.setConf(conf); |
| } |
| } |
| |
| /** |
| * Gets the {@link Configuration}. |
| */ |
| @Override |
| public Configuration getConf() { |
| return this.conf; |
| } |
| |
| /** |
| * Initializes the {@link ClientRequestInterceptor}. |
| */ |
| @Override |
| public void init(String userName) { |
| setupUser(userName); |
| if (this.nextInterceptor != null) { |
| this.nextInterceptor.init(userName); |
| } |
| } |
| |
| /** |
| * Disposes the {@link ClientRequestInterceptor}. |
| */ |
| @Override |
| public void shutdown() { |
| if (this.nextInterceptor != null) { |
| this.nextInterceptor.shutdown(); |
| } |
| } |
| |
| /** |
| * Gets the next {@link ClientRequestInterceptor} in the chain. |
| */ |
| @Override |
| public ClientRequestInterceptor getNextInterceptor() { |
| return this.nextInterceptor; |
| } |
| |
| private void setupUser(String userName) { |
| |
| try { |
| // Do not create a proxy user if user name matches the user name on |
| // current UGI |
| if (userName.equalsIgnoreCase( |
| UserGroupInformation.getCurrentUser().getUserName())) { |
| user = UserGroupInformation.getCurrentUser(); |
| } else { |
| user = UserGroupInformation.createProxyUser(userName, |
| UserGroupInformation.getCurrentUser()); |
| } |
| } catch (IOException e) { |
| String message = "Error while creating Router ClientRM Service for user:"; |
| if (user != null) { |
| message += ", user: " + user; |
| } |
| |
| LOG.info(message); |
| throw new YarnRuntimeException(message, e); |
| } |
| } |
| |
| } |