| /** |
| * 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 |
| * <p> |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * <p> |
| * 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.falcon.hook; |
| |
| import com.google.common.util.concurrent.ThreadFactoryBuilder; |
| import org.apache.atlas.AtlasConstants; |
| import org.apache.atlas.falcon.bridge.FalconBridge; |
| import org.apache.atlas.falcon.event.FalconEvent; |
| import org.apache.atlas.falcon.publisher.FalconEventPublisher; |
| import org.apache.atlas.hook.AtlasHook; |
| import org.apache.atlas.kafka.NotificationProvider; |
| import org.apache.atlas.notification.hook.HookNotification; |
| import org.apache.atlas.typesystem.Referenceable; |
| import org.apache.falcon.entity.store.ConfigurationStore; |
| import org.apache.falcon.entity.v0.feed.Feed; |
| import org.apache.falcon.entity.v0.process.Process; |
| import org.apache.hadoop.util.ShutdownHookManager; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.LinkedBlockingQueue; |
| import java.util.concurrent.ThreadPoolExecutor; |
| import java.util.concurrent.TimeUnit; |
| |
| /** |
| * Falcon hook sends lineage information to the Atlas Service. |
| */ |
| public class FalconHook extends AtlasHook implements FalconEventPublisher { |
| private static final Logger LOG = LoggerFactory.getLogger(FalconHook.class); |
| |
| public static final String CONF_PREFIX = "atlas.hook.falcon."; |
| private static final String MIN_THREADS = CONF_PREFIX + "minThreads"; |
| private static final String MAX_THREADS = CONF_PREFIX + "maxThreads"; |
| private static final String KEEP_ALIVE_TIME = CONF_PREFIX + "keepAliveTime"; |
| public static final String QUEUE_SIZE = CONF_PREFIX + "queueSize"; |
| public static final String CONF_SYNC = CONF_PREFIX + "synchronous"; |
| |
| public static final String HOOK_NUM_RETRIES = CONF_PREFIX + "numRetries"; |
| |
| // wait time determines how long we wait before we exit the jvm on |
| // shutdown. Pending requests after that will not be sent. |
| private static final int WAIT_TIME = 3; |
| private static ExecutorService executor; |
| |
| private static final int minThreadsDefault = 5; |
| private static final int maxThreadsDefault = 5; |
| private static final long keepAliveTimeDefault = 10; |
| private static final int queueSizeDefault = 10000; |
| |
| private static boolean sync; |
| |
| private static ConfigurationStore STORE; |
| |
| private enum Operation { |
| ADD, |
| UPDATE |
| } |
| |
| static { |
| try { |
| // initialize the async facility to process hook calls. We don't |
| // want to do this inline since it adds plenty of overhead for the query. |
| int minThreads = atlasProperties.getInt(MIN_THREADS, minThreadsDefault); |
| int maxThreads = atlasProperties.getInt(MAX_THREADS, maxThreadsDefault); |
| long keepAliveTime = atlasProperties.getLong(KEEP_ALIVE_TIME, keepAliveTimeDefault); |
| int queueSize = atlasProperties.getInt(QUEUE_SIZE, queueSizeDefault); |
| sync = atlasProperties.getBoolean(CONF_SYNC, false); |
| |
| executor = new ThreadPoolExecutor(minThreads, maxThreads, keepAliveTime, TimeUnit.MILLISECONDS, |
| new LinkedBlockingQueue<Runnable>(queueSize), |
| new ThreadFactoryBuilder().setNameFormat("Atlas Logger %d").build()); |
| |
| ShutdownHookManager.get().addShutdownHook(new Thread() { |
| @Override |
| public void run() { |
| try { |
| LOG.info("==> Shutdown of Atlas Falcon Hook"); |
| |
| executor.shutdown(); |
| executor.awaitTermination(WAIT_TIME, TimeUnit.SECONDS); |
| executor = null; |
| } catch (InterruptedException ie) { |
| LOG.info("Interrupt received in shutdown."); |
| } finally { |
| LOG.info("<== Shutdown of Atlas Falcon Hook"); |
| } |
| // shutdown client |
| } |
| }, AtlasConstants.ATLAS_SHUTDOWN_HOOK_PRIORITY); |
| |
| STORE = ConfigurationStore.get(); |
| |
| notificationInterface = NotificationProvider.get(); |
| |
| } catch (Exception e) { |
| LOG.error("Caught exception initializing the falcon hook.", e); |
| } |
| |
| |
| LOG.info("Created Atlas Hook for Falcon"); |
| } |
| |
| @Override |
| public void publish(final Data data) throws Exception { |
| final FalconEvent event = data.getEvent(); |
| try { |
| if (sync) { |
| fireAndForget(event); |
| } else { |
| executor.submit(new Runnable() { |
| @Override |
| public void run() { |
| try { |
| fireAndForget(event); |
| } catch (Throwable e) { |
| LOG.info("Atlas hook failed", e); |
| } |
| } |
| }); |
| } |
| } catch (Throwable t) { |
| LOG.warn("Error in processing data {}", data, t); |
| } |
| } |
| |
| @Override |
| protected String getNumberOfRetriesPropertyKey() { |
| return HOOK_NUM_RETRIES; |
| } |
| |
| private void fireAndForget(FalconEvent event) throws Exception { |
| LOG.info("Entered Atlas hook for Falcon hook operation {}", event.getOperation()); |
| List<HookNotification.HookNotificationMessage> messages = new ArrayList<>(); |
| |
| Operation op = getOperation(event.getOperation()); |
| String user = getUser(event.getUser()); |
| LOG.info("fireAndForget user:{}", user); |
| switch (op) { |
| case ADD: |
| messages.add(new HookNotification.EntityCreateRequest(user, createEntities(event, user))); |
| break; |
| |
| } |
| notifyEntities(messages); |
| } |
| |
| private List<Referenceable> createEntities(FalconEvent event, String user) throws Exception { |
| List<Referenceable> entities = new ArrayList<>(); |
| |
| switch (event.getOperation()) { |
| case ADD_CLUSTER: |
| entities.add(FalconBridge |
| .createClusterEntity((org.apache.falcon.entity.v0.cluster.Cluster) event.getEntity())); |
| break; |
| |
| case ADD_PROCESS: |
| entities.addAll(FalconBridge.createProcessEntity((Process) event.getEntity(), STORE)); |
| break; |
| |
| case ADD_FEED: |
| entities.addAll(FalconBridge.createFeedCreationEntity((Feed) event.getEntity(), STORE)); |
| break; |
| |
| case UPDATE_CLUSTER: |
| case UPDATE_FEED: |
| case UPDATE_PROCESS: |
| default: |
| LOG.info("Falcon operation {} is not valid or supported", event.getOperation()); |
| } |
| |
| return entities; |
| } |
| |
| private static Operation getOperation(final FalconEvent.OPERATION op) throws Exception { |
| switch (op) { |
| case ADD_CLUSTER: |
| case ADD_FEED: |
| case ADD_PROCESS: |
| return Operation.ADD; |
| |
| case UPDATE_CLUSTER: |
| case UPDATE_FEED: |
| case UPDATE_PROCESS: |
| return Operation.UPDATE; |
| |
| default: |
| throw new Exception("Falcon operation " + op + " is not valid or supported"); |
| } |
| } |
| } |
| |