| /* |
| * 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.ranger.authorization.hadoop; |
| |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.hdfs.server.namenode.INodeAttributeProvider; |
| import org.apache.hadoop.hdfs.server.namenode.INodeAttributes; |
| import org.apache.ranger.plugin.classloader.RangerPluginClassLoader; |
| |
| public class RangerHdfsAuthorizer extends INodeAttributeProvider { |
| private static final Log LOG = LogFactory.getLog(RangerHdfsAuthorizer.class); |
| |
| private static final String RANGER_PLUGIN_TYPE = "hdfs"; |
| private static final String RANGER_HDFS_AUTHORIZER_IMPL_CLASSNAME = "org.apache.ranger.authorization.hadoop.RangerHdfsAuthorizer"; |
| |
| private INodeAttributeProvider rangerHdfsAuthorizerImpl = null; |
| private static RangerPluginClassLoader rangerPluginClassLoader = null; |
| |
| public RangerHdfsAuthorizer() { |
| if(LOG.isDebugEnabled()) { |
| LOG.debug("==> RangerHdfsAuthorizer.RangerHdfsAuthorizer()"); |
| } |
| |
| this.init(); |
| |
| if(LOG.isDebugEnabled()) { |
| LOG.debug("<== RangerHdfsAuthorizer.RangerHdfsAuthorizer()"); |
| } |
| } |
| |
| public void init(){ |
| if(LOG.isDebugEnabled()) { |
| LOG.debug("==> RangerHdfsAuthorizer.init()"); |
| } |
| |
| try { |
| |
| rangerPluginClassLoader = RangerPluginClassLoader.getInstance(RANGER_PLUGIN_TYPE, this.getClass()); |
| |
| @SuppressWarnings("unchecked") |
| Class<INodeAttributeProvider> cls = (Class<INodeAttributeProvider>) Class.forName(RANGER_HDFS_AUTHORIZER_IMPL_CLASSNAME, true, rangerPluginClassLoader); |
| |
| activatePluginClassLoader(); |
| |
| rangerHdfsAuthorizerImpl = cls.newInstance(); |
| } catch (Exception e) { |
| // check what need to be done |
| LOG.error("Error Enabling RangerHdfsPlugin", e); |
| } finally { |
| deactivatePluginClassLoader(); |
| } |
| |
| if(LOG.isDebugEnabled()) { |
| LOG.debug("<== RangerHdfsAuthorizer.init()"); |
| } |
| } |
| |
| @Override |
| public void start() { |
| if(LOG.isDebugEnabled()) { |
| LOG.debug("==> RangerHdfsAuthorizer.start()"); |
| } |
| |
| try { |
| activatePluginClassLoader(); |
| |
| rangerHdfsAuthorizerImpl.start(); |
| } finally { |
| deactivatePluginClassLoader(); |
| } |
| |
| if(LOG.isDebugEnabled()) { |
| LOG.debug("<== RangerHdfsAuthorizer.start()"); |
| } |
| } |
| |
| @Override |
| public void stop() { |
| if(LOG.isDebugEnabled()) { |
| LOG.debug("==> RangerHdfsAuthorizer.stop()"); |
| } |
| |
| try { |
| activatePluginClassLoader(); |
| |
| rangerHdfsAuthorizerImpl.stop(); |
| } finally { |
| deactivatePluginClassLoader(); |
| } |
| |
| if(LOG.isDebugEnabled()) { |
| LOG.debug("<== RangerHdfsAuthorizer.stop()"); |
| } |
| } |
| |
| @Override |
| public INodeAttributes getAttributes(String fullPath, INodeAttributes inode) { |
| if(LOG.isDebugEnabled()) { |
| LOG.debug("==> RangerHdfsAuthorizer.getAttributes(" + fullPath + ")"); |
| } |
| |
| INodeAttributes ret = null; |
| |
| try { |
| activatePluginClassLoader(); |
| |
| ret = rangerHdfsAuthorizerImpl.getAttributes(fullPath,inode); // return default attributes |
| } finally { |
| deactivatePluginClassLoader(); |
| } |
| |
| if(LOG.isDebugEnabled()) { |
| LOG.debug("<== RangerHdfsAuthorizer.getAttributes(" + fullPath + "): " + ret); |
| } |
| |
| return ret; |
| } |
| |
| @Override |
| public INodeAttributes getAttributes(String[] pathElements, INodeAttributes inode) { |
| if(LOG.isDebugEnabled()) { |
| LOG.debug("==> RangerHdfsAuthorizer.getAttributes(pathElementsCount=" + (pathElements == null ? 0 : pathElements.length) + ")"); |
| } |
| |
| INodeAttributes ret = null; |
| |
| try { |
| activatePluginClassLoader(); |
| |
| ret = rangerHdfsAuthorizerImpl.getAttributes(pathElements,inode); |
| } finally { |
| deactivatePluginClassLoader(); |
| } |
| |
| if(LOG.isDebugEnabled()) { |
| LOG.debug("<== RangerHdfsAuthorizer.getAttributes(pathElementsCount=" + (pathElements == null ? 0 : pathElements.length) + "): " + ret); |
| } |
| |
| return ret; |
| } |
| |
| @Override |
| public AccessControlEnforcer getExternalAccessControlEnforcer(AccessControlEnforcer defaultEnforcer) { |
| if(LOG.isDebugEnabled()) { |
| LOG.debug("==> RangerHdfsAuthorizer.getExternalAccessControlEnforcer()"); |
| } |
| |
| AccessControlEnforcer ret = null; |
| |
| ret = rangerHdfsAuthorizerImpl.getExternalAccessControlEnforcer(defaultEnforcer); |
| |
| if(LOG.isDebugEnabled()) { |
| LOG.debug("<== RangerHdfsAuthorizer.getExternalAccessControlEnforcer()"); |
| } |
| |
| return ret; |
| } |
| |
| private void activatePluginClassLoader() { |
| if(rangerPluginClassLoader != null) { |
| rangerPluginClassLoader.activate(); |
| } |
| } |
| |
| private void deactivatePluginClassLoader() { |
| if(rangerPluginClassLoader != null) { |
| rangerPluginClassLoader.deactivate(); |
| } |
| } |
| } |
| |