| /** |
| * 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.atlas.hive.hook; |
| |
| import org.apache.atlas.plugin.classloader.AtlasPluginClassLoader; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.hive.metastore.MetaStoreEventListener; |
| import org.apache.hadoop.hive.metastore.api.MetaException; |
| import org.apache.hadoop.hive.metastore.events.*; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Hive Metastore hook to capture DDL operations for atlas entity registration. |
| */ |
| public class HiveMetastoreHook extends MetaStoreEventListener { |
| private static final String ATLAS_PLUGIN_TYPE = "hive"; |
| private static final String ATLAS_HIVE_METASTORE_HOOK_IMPL_CLASSNAME = "org.apache.atlas.hive.hook.HiveMetastoreHookImpl"; |
| public static final Logger LOG = LoggerFactory.getLogger(HiveMetastoreHook.class); |
| |
| private AtlasPluginClassLoader atlasPluginClassLoader = null; |
| private MetaStoreEventListener atlasMetastoreHookImpl = null; |
| private Configuration config; |
| |
| public HiveMetastoreHook(Configuration config) { |
| super(config); |
| |
| this.config = config; |
| |
| this.initialize(); |
| } |
| |
| private void initialize() { |
| if (LOG.isDebugEnabled()) { |
| LOG.debug("==> HiveMetastoreHook.initialize()"); |
| } |
| |
| try { |
| atlasPluginClassLoader = AtlasPluginClassLoader.getInstance(ATLAS_PLUGIN_TYPE, this.getClass()); |
| |
| @SuppressWarnings("unchecked") |
| Class<MetaStoreEventListener> cls = (Class<MetaStoreEventListener>) |
| Class.forName(ATLAS_HIVE_METASTORE_HOOK_IMPL_CLASSNAME, true, atlasPluginClassLoader); |
| |
| activatePluginClassLoader(); |
| |
| atlasMetastoreHookImpl = cls.getDeclaredConstructor(Configuration.class).newInstance(config); |
| } catch (Exception ex) { |
| LOG.error("Error instantiating Atlas hook implementation", ex); |
| } finally { |
| deactivatePluginClassLoader(); |
| } |
| |
| if (LOG.isDebugEnabled()) { |
| LOG.debug("<== HiveMetastoreHook.initialize()"); |
| } |
| } |
| |
| @Override |
| public void onCreateTable(CreateTableEvent tableEvent) throws MetaException { |
| if (LOG.isDebugEnabled()) { |
| LOG.debug("==> HiveMetastoreHook.onCreateTable()"); |
| } |
| |
| try { |
| activatePluginClassLoader(); |
| |
| atlasMetastoreHookImpl.onCreateTable(tableEvent); |
| } finally { |
| deactivatePluginClassLoader(); |
| } |
| |
| if (LOG.isDebugEnabled()) { |
| LOG.debug("<== HiveMetastoreHook.onCreateTable()"); |
| } |
| } |
| |
| @Override |
| public void onDropTable(DropTableEvent tableEvent) throws MetaException { |
| if (LOG.isDebugEnabled()) { |
| LOG.debug("==> HiveMetastoreHook.onDropTable()"); |
| } |
| |
| try { |
| activatePluginClassLoader(); |
| |
| atlasMetastoreHookImpl.onDropTable(tableEvent); |
| } finally { |
| deactivatePluginClassLoader(); |
| } |
| |
| if (LOG.isDebugEnabled()) { |
| LOG.debug("<== HiveMetastoreHook.onDropTable()"); |
| } |
| } |
| |
| @Override |
| public void onAlterTable(AlterTableEvent tableEvent) throws MetaException { |
| if (LOG.isDebugEnabled()) { |
| LOG.debug("==> HiveMetastoreHook.onAlterTable()"); |
| } |
| |
| try { |
| activatePluginClassLoader(); |
| |
| atlasMetastoreHookImpl.onAlterTable(tableEvent); |
| } finally { |
| deactivatePluginClassLoader(); |
| } |
| |
| if (LOG.isDebugEnabled()) { |
| LOG.debug("<== HiveMetastoreHook.onAlterTable()"); |
| } |
| } |
| |
| @Override |
| public void onCreateDatabase(CreateDatabaseEvent dbEvent) throws MetaException { |
| if (LOG.isDebugEnabled()) { |
| LOG.debug("==> HiveMetastoreHook.onCreateDatabase()"); |
| } |
| |
| try { |
| activatePluginClassLoader(); |
| |
| atlasMetastoreHookImpl.onCreateDatabase(dbEvent); |
| } finally { |
| deactivatePluginClassLoader(); |
| } |
| |
| if (LOG.isDebugEnabled()) { |
| LOG.debug("<== HiveMetastoreHook.onCreateDatabase()"); |
| } |
| } |
| |
| @Override |
| public void onDropDatabase(DropDatabaseEvent dbEvent) throws MetaException { |
| if (LOG.isDebugEnabled()) { |
| LOG.debug("==> HiveMetastoreHook.onDropDatabase()"); |
| } |
| |
| try { |
| activatePluginClassLoader(); |
| |
| atlasMetastoreHookImpl.onDropDatabase(dbEvent); |
| } finally { |
| deactivatePluginClassLoader(); |
| } |
| |
| if (LOG.isDebugEnabled()) { |
| LOG.debug("<== HiveMetastoreHook.onDropDatabase()"); |
| } |
| } |
| |
| @Override |
| public void onAlterDatabase(AlterDatabaseEvent dbEvent) throws MetaException { |
| if (LOG.isDebugEnabled()) { |
| LOG.debug("==> HiveMetastoreHook.onAlterDatabase()"); |
| } |
| |
| try { |
| activatePluginClassLoader(); |
| |
| atlasMetastoreHookImpl.onAlterDatabase(dbEvent); |
| } finally { |
| deactivatePluginClassLoader(); |
| } |
| |
| if (LOG.isDebugEnabled()) { |
| LOG.debug("<== HiveMetastoreHook.onAlterDatabase()"); |
| } |
| } |
| |
| private void activatePluginClassLoader() { |
| if (atlasPluginClassLoader != null) { |
| atlasPluginClassLoader.activate(); |
| } |
| } |
| |
| private void deactivatePluginClassLoader() { |
| if (atlasPluginClassLoader != null) { |
| atlasPluginClassLoader.deactivate(); |
| } |
| } |
| } |