| /** |
| * 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.web.setup; |
| |
| import com.google.common.base.Charsets; |
| import com.google.inject.Inject; |
| import com.google.inject.Singleton; |
| import org.apache.atlas.AtlasConstants; |
| import org.apache.atlas.AtlasException; |
| import org.apache.atlas.ha.AtlasServerIdSelector; |
| import org.apache.atlas.ha.HAConfiguration; |
| import org.apache.atlas.setup.SetupException; |
| import org.apache.atlas.setup.SetupStep; |
| import org.apache.atlas.web.service.AtlasZookeeperSecurityProperties; |
| import org.apache.atlas.web.service.CuratorFactory; |
| import org.apache.commons.configuration.Configuration; |
| import org.apache.curator.framework.CuratorFramework; |
| import org.apache.curator.framework.recipes.locks.InterProcessMutex; |
| import org.apache.zookeeper.ZooDefs; |
| import org.apache.zookeeper.data.ACL; |
| import org.apache.zookeeper.data.Stat; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.util.Arrays; |
| import java.util.List; |
| import java.util.Set; |
| |
| @Singleton |
| public class SetupSteps { |
| private static final Logger LOG = LoggerFactory.getLogger(SetupSteps.class); |
| public static final String SETUP_IN_PROGRESS_NODE = "/setup_in_progress"; |
| |
| private final Set<SetupStep> setupSteps; |
| private CuratorFactory curatorFactory; |
| |
| @Inject |
| public SetupSteps(Set<SetupStep> steps, CuratorFactory curatorFactory) { |
| setupSteps = steps; |
| this.curatorFactory = curatorFactory; |
| } |
| |
| /** |
| * Call each registered {@link SetupStep} one after the other. |
| * @throws SetupException Thrown with any error during running setup, including Zookeeper interactions, and |
| * individual failures in the {@link SetupStep}. |
| * @param configuration Configuration for Atlas server. |
| */ |
| public void runSetup(Configuration configuration) throws SetupException { |
| HAConfiguration.ZookeeperProperties zookeeperProperties = HAConfiguration.getZookeeperProperties(configuration); |
| InterProcessMutex lock = curatorFactory.lockInstance(zookeeperProperties.getZkRoot()); |
| try { |
| LOG.info("Trying to acquire lock for running setup."); |
| lock.acquire(); |
| LOG.info("Acquired lock for running setup."); |
| handleSetupInProgress(configuration, zookeeperProperties); |
| for (SetupStep step : setupSteps) { |
| LOG.info("Running setup step: " + step); |
| step.run(); |
| } |
| clearSetupInProgress(zookeeperProperties); |
| } catch (SetupException se) { |
| LOG.error("Got setup exception while trying to setup", se); |
| throw se; |
| } catch (Exception e) { |
| LOG.error("Error running setup steps", e); |
| throw new SetupException("Error running setup steps", e); |
| } finally { |
| releaseLock(lock); |
| curatorFactory.close(); |
| } |
| } |
| |
| private void handleSetupInProgress(Configuration configuration, HAConfiguration.ZookeeperProperties zookeeperProperties) throws SetupException { |
| if (setupInProgress(zookeeperProperties)) { |
| throw new SetupException("A previous setup run may not have completed cleanly. " + |
| "Ensure setup can run and retry after clearing the zookeeper node at " + |
| lockPath(zookeeperProperties)); |
| } |
| createSetupInProgressNode(configuration, zookeeperProperties); |
| } |
| |
| private void releaseLock(InterProcessMutex lock) { |
| try { |
| lock.release(); |
| LOG.info("Released lock after running setup."); |
| } catch (Exception e) { |
| LOG.error("Error releasing acquired lock.", e); |
| } |
| } |
| |
| private boolean setupInProgress(HAConfiguration.ZookeeperProperties zookeeperProperties) { |
| CuratorFramework client = curatorFactory.clientInstance(); |
| Stat lockInProgressStat; |
| String path = lockPath(zookeeperProperties); |
| try { |
| lockInProgressStat = client.checkExists().forPath(path); |
| return lockInProgressStat != null; |
| } catch (Exception e) { |
| LOG.error("Error checking if path {} exists.", path, e); |
| return true; |
| } |
| } |
| |
| private void clearSetupInProgress(HAConfiguration.ZookeeperProperties zookeeperProperties) |
| throws Exception { |
| CuratorFramework client = curatorFactory.clientInstance(); |
| String path = lockPath(zookeeperProperties); |
| client.delete().forPath(path); |
| LOG.info("Deleted lock path after completing setup {}", path); |
| } |
| |
| private String lockPath(HAConfiguration.ZookeeperProperties zookeeperProperties) { |
| return zookeeperProperties.getZkRoot()+ SETUP_IN_PROGRESS_NODE; |
| } |
| |
| private String getServerId(Configuration configuration) { |
| String serverId = configuration.getString(AtlasConstants.ATLAS_REST_ADDRESS_KEY, |
| AtlasConstants.DEFAULT_ATLAS_REST_ADDRESS); |
| try { |
| serverId = AtlasServerIdSelector.selectServerId(configuration); |
| } catch (AtlasException e) { |
| LOG.error("Could not select server id, defaulting to {}", serverId, e); |
| } |
| return serverId; |
| } |
| |
| private void createSetupInProgressNode(Configuration configuration, |
| HAConfiguration.ZookeeperProperties zookeeperProperties) |
| throws SetupException { |
| String serverId = getServerId(configuration); |
| ACL acl = AtlasZookeeperSecurityProperties.parseAcl(zookeeperProperties.getAcl(), |
| ZooDefs.Ids.OPEN_ACL_UNSAFE.get(0)); |
| List<ACL> acls = Arrays.asList(new ACL[]{acl}); |
| |
| CuratorFramework client = curatorFactory.clientInstance(); |
| try { |
| String path = lockPath(zookeeperProperties); |
| client.create().withACL(acls).forPath(path, serverId.getBytes(Charsets.UTF_8)); |
| LOG.info("Created lock node {}", path); |
| } catch (Exception e) { |
| throw new SetupException("Could not create lock node before running setup.", e); |
| } |
| } |
| } |