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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 org.apache.hadoop.mapred.JobConf;
021 import org.apache.oozie.ErrorCode;
022 import org.apache.oozie.action.ActionExecutor.Context;
023 import org.apache.oozie.action.hadoop.CredentialException;
024 import org.apache.oozie.action.hadoop.Credentials;
025 import org.apache.oozie.action.hadoop.CredentialsProperties;
026 import org.apache.oozie.util.XLog;
027
028 /**
029 * Credentials implementation to store in jobConf, HCat-specific properties such as Principal and Uri
030 * User specifies these credential properties along with the action configuration
031 * The jobConf is used further to pass credentials to the tasks while running
032 * Oozie server should be configured to use this Credentials class by including it via property 'oozie.credentials.credentialclasses'
033 * User can extend the parent class to implement own class as well
034 * for handling custom token-based credentials and add to the above server property
035 */
036 public class HCatCredentials extends Credentials {
037
038 private static final String HCAT_METASTORE_PRINCIPAL = "hcat.metastore.principal";
039 private static final String HCAT_METASTORE_URI = "hcat.metastore.uri";
040
041 /* (non-Javadoc)
042 * @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)
043 */
044 @Override
045 public void addtoJobConf(JobConf jobconf, CredentialsProperties props, Context context) throws Exception {
046 try {
047 String principal = props.getProperties().get(HCAT_METASTORE_PRINCIPAL);
048 if (principal == null || principal.isEmpty()) {
049 throw new CredentialException(ErrorCode.E0510,
050 HCAT_METASTORE_PRINCIPAL + " is required to get hcat credential");
051 }
052 String server = props.getProperties().get(HCAT_METASTORE_URI);
053 if (server == null || server.isEmpty()) {
054 throw new CredentialException(ErrorCode.E0510,
055 HCAT_METASTORE_URI + " is required to get hcat credential");
056 }
057 HCatCredentialHelper hcch = new HCatCredentialHelper();
058 hcch.set(jobconf, principal, server);
059 }
060 catch (Exception e) {
061 XLog.getLog(getClass()).warn("Exception in addtoJobConf", e);
062 throw e;
063 }
064 }
065 }