| /** |
| * 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.oozie.action.hadoop; |
| |
| import java.util.HashMap; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.security.Credentials; |
| import org.apache.oozie.ErrorCode; |
| import org.apache.oozie.action.ActionExecutor.Context; |
| import org.apache.oozie.service.HCatAccessorService; |
| import org.apache.oozie.service.Services; |
| import org.apache.oozie.util.XLog; |
| |
| /** |
| * Credentials implementation to store in jobConf, HCat-specific properties such as Principal and Uri |
| * User specifies these credential properties along with the action configuration |
| * The jobConf is used further to pass credentials to the tasks while running |
| * Oozie server should be configured to use this Credentials class by including it via property |
| * 'oozie.credentials.credentialclasses' |
| * User can extend the parent class to implement own class as well |
| * for handling custom token-based credentials and add to the above server property |
| */ |
| public class HCatCredentials implements CredentialsProvider { |
| |
| private static final String HCAT_METASTORE_PRINCIPAL = "hcat.metastore.principal"; |
| private static final String HCAT_METASTORE_URI = "hcat.metastore.uri"; |
| private static final String HIVE_METASTORE_PRINCIPAL = "hive.metastore.kerberos.principal"; |
| private static final String HIVE_METASTORE_URI = "hive.metastore.uris"; |
| private final static Configuration hiveConf = new Configuration(false); |
| static { |
| hiveConf.addResource("hive-site.xml"); |
| } |
| |
| @Override |
| public void updateCredentials(Credentials credentials, Configuration config, CredentialsProperties props, |
| Context context) throws Exception { |
| try { |
| |
| String principal = getProperty(props.getProperties(), HCAT_METASTORE_PRINCIPAL, HIVE_METASTORE_PRINCIPAL); |
| if (principal == null || principal.isEmpty()) { |
| throw new CredentialException(ErrorCode.E0510, |
| HCAT_METASTORE_PRINCIPAL + " is required to get hcat credential"); |
| } |
| |
| String server = getProperty(props.getProperties(), HCAT_METASTORE_URI, HIVE_METASTORE_URI); |
| if (server == null || server.isEmpty()) { |
| throw new CredentialException(ErrorCode.E0510, |
| HCAT_METASTORE_URI + " is required to get hcat credential"); |
| } |
| HCatCredentialHelper hcch = new HCatCredentialHelper(); |
| hcch.set(credentials, config, principal, server); |
| } |
| catch (Exception e) { |
| XLog.getLog(getClass()).warn("Exception in updateCredentials", e); |
| throw e; |
| } |
| } |
| |
| /** |
| * Returns the value for the oozieConfName if its present in prop map else |
| * value of hiveConfName. It will also check HCatAccessorService and |
| * HiveConf for hiveConfName. |
| * |
| * @param prop |
| * @param oozieConfName |
| * @param hiveConfName |
| * @return value for the oozieConfName if its present else value of |
| * hiveConfName. If both are absent then returns null. |
| */ |
| private String getProperty(HashMap<String, String> prop, String oozieConfName, String hiveConfName) { |
| String value = prop.get(oozieConfName) == null ? prop.get(hiveConfName) : prop.get(oozieConfName); |
| if (value == null || value.isEmpty()) { |
| HCatAccessorService hCatService = Services.get().get(HCatAccessorService.class); |
| Configuration hCatConf = hCatService.getHCatConf(); |
| if (hCatConf != null) { |
| value = hCatConf.get(hiveConfName); |
| } |
| } |
| if (value == null || value.isEmpty()) { |
| value = hiveConf.get(hiveConfName); |
| } |
| return value; |
| } |
| |
| |
| } |