hadoop ClusterUserInfo 源码
haddop ClusterUserInfo 代码
文件路径：/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/dao/ClusterUserInfo.java
/**
* 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.resourcemanager.webapp.dao;
import org.apache.hadoop.classification.InterfaceStability;
import org.apache.hadoop.security.UserGroupInformation;
import org.apache.hadoop.yarn.server.resourcemanager.ResourceManager;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlRootElement;
/**
* The YARN UI doesn't have centralized login mechanism. While accessing UI2 from kerberized shell, user who is
* placed the request to YARN need to be displayed in UI. Given requests from UI2 is routed via Proxy, only RM can provide
* the user who has placed the request. This DAO object help to provide the requested user and also RM logged in user.
* the response sent by RM is authenticated user instead of proxy user.
* It is always good to display authenticated user in browser which eliminates lot of confusion to end use.
*/
@XmlRootElement
@XmlAccessorType(XmlAccessType.FIELD)
@InterfaceStability.Unstable
public class ClusterUserInfo {
// User who has started the RM
protected String rmLoginUser;
// User who has placed the request
protected String requestedUser;
public ClusterUserInfo() {
}
public ClusterUserInfo(ResourceManager rm, UserGroupInformation ugi) {
this.rmLoginUser = rm.getRMLoginUser();
if (ugi != null) {
this.requestedUser = ugi.getShortUserName();
} else {
this.requestedUser = "UNKNOWN_USER";
}
}
public String getRmLoginUser() {
return rmLoginUser;
}
public String getRequestedUser() {
return requestedUser;
}
}
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