001 /**
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements. See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership. The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License. You may obtain a copy of the License at
009 *
010 * http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018 package org.apache.oozie.action.hadoop;
019
020 import java.io.IOException;
021 import java.util.Map;
022
023 import org.apache.hadoop.conf.Configuration;
024 import org.apache.hadoop.hbase.HBaseConfiguration;
025 import org.apache.hadoop.hbase.security.User;
026 import org.apache.hadoop.mapred.JobConf;
027 import org.apache.oozie.action.ActionExecutor.Context;
028 import org.apache.oozie.action.hadoop.Credentials;
029 import org.apache.oozie.action.hadoop.CredentialsProperties;
030 import org.apache.oozie.util.XLog;
031 import org.apache.hadoop.security.UserGroupInformation;
032
033
034 /**
035 * Hbase Credentials implementation to store in jobConf
036 * The jobConf is used further to pass credentials to the tasks while running
037 * Oozie server should be configured to use this Credentials class by including it via property 'oozie.credentials.credentialclasses'
038 *
039 */
040 public class HbaseCredentials extends Credentials {
041
042
043 /* (non-Javadoc)
044 * @see org.apache.oozie.action.hadoop.Credentials#addtoJobConf(org.apache.hadoop.mapred.JobConf, org.apache.oozie.action.hadoop.CredentialsProperties, org.apache.oozie.action.ActionExecutor.Context)
045 */
046 @Override
047 public void addtoJobConf(JobConf jobConf, CredentialsProperties props, Context context) throws Exception {
048 try {
049 copyHbaseConfToJobConf(jobConf, props);
050 obtainToken(jobConf, context);
051 }
052 catch (Exception e) {
053 XLog.getLog(getClass()).warn("Exception in receiving hbase credentials", e);
054 throw e;
055 }
056 }
057
058 void copyHbaseConfToJobConf(JobConf jobConf, CredentialsProperties props) {
059 // Create configuration using hbase-site.xml/hbase-default.xml
060 Configuration hbaseConf = HBaseConfiguration.create();
061 // copy cred props to hbaseconf and override if values already exists
062 addPropsConf(props, hbaseConf);
063 // copy conf from hbaseConf to jobConf without overriding the
064 // already existing values of jobConf
065 injectConf(hbaseConf, jobConf);
066 }
067
068 private void obtainToken(JobConf jobConf, Context context) throws IOException, InterruptedException {
069 String user = context.getWorkflow().getUser();
070 UserGroupInformation ugi = UserGroupInformation.createProxyUser(user, UserGroupInformation.getLoginUser());
071 User u = User.create(ugi);
072 u.obtainAuthTokenForJob(jobConf);
073 }
074
075 private void addPropsConf(CredentialsProperties props, Configuration destConf) {
076 for (Map.Entry<String, String> entry : props.getProperties().entrySet()) {
077 destConf.set(entry.getKey(), entry.getValue());
078 }
079 }
080
081 private void injectConf(Configuration srcConf, Configuration destConf) {
082 for (Map.Entry<String, String> entry : srcConf) {
083 String name = entry.getKey();
084 if (destConf.get(name) == null) {
085 String value = entry.getValue();
086 destConf.set(name, value);
087 }
088 }
089 }
090 }