| /* |
| * 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.phoenix.coprocessor.tasks; |
| |
| import org.apache.phoenix.coprocessor.MetaDataProtocol; |
| import org.apache.phoenix.coprocessor.TaskRegionObserver; |
| import org.apache.phoenix.util.EnvironmentEdgeManager; |
| import org.apache.phoenix.util.SchemaUtil; |
| import org.apache.phoenix.util.ViewUtil; |
| import org.apache.phoenix.jdbc.PhoenixConnection; |
| import org.apache.phoenix.schema.MetaDataClient; |
| import org.apache.phoenix.schema.task.Task; |
| import org.apache.phoenix.util.PhoenixRuntime; |
| import org.apache.phoenix.util.QueryUtil; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.sql.SQLException; |
| import java.sql.Timestamp; |
| import java.util.Properties; |
| |
| import static org.apache.phoenix.jdbc.PhoenixDatabaseMetaData.SYSTEM_CHILD_LINK_NAME_BYTES; |
| |
| /** |
| * Task runs periodically to clean up task of child views whose parent is dropped |
| * |
| */ |
| public class DropChildViewsTask extends BaseTask { |
| public static final Logger LOGGER = LoggerFactory.getLogger(DropChildViewsTask.class); |
| |
| public TaskRegionObserver.TaskResult run(Task.TaskRecord taskRecord) { |
| PhoenixConnection pconn = null; |
| Timestamp timestamp = taskRecord.getTimeStamp(); |
| try { |
| String tenantId = taskRecord.getTenantId(); |
| if (tenantId != null) { |
| Properties tenantProps = new Properties(); |
| tenantProps.setProperty(PhoenixRuntime.TENANT_ID_ATTRIB, tenantId); |
| pconn = QueryUtil.getConnectionOnServer(tenantProps, env.getConfiguration()) |
| .unwrap(PhoenixConnection.class); |
| } |
| else { |
| pconn = QueryUtil.getConnectionOnServer(env.getConfiguration()).unwrap(PhoenixConnection.class); |
| } |
| |
| MetaDataProtocol.MetaDataMutationResult result = new MetaDataClient(pconn).updateCache(pconn.getTenantId(), |
| taskRecord.getSchemaName(), taskRecord.getTableName(), true); |
| if (result.getMutationCode() != MetaDataProtocol.MutationCode.TABLE_ALREADY_EXISTS) { |
| ViewUtil.dropChildViews(env, taskRecord.getTenantIdBytes(), |
| taskRecord.getSchemaNameBytes(), taskRecord.getTableNameBytes(), |
| SchemaUtil.getPhysicalTableName( |
| SYSTEM_CHILD_LINK_NAME_BYTES, |
| env.getConfiguration()).getName()); |
| return new TaskRegionObserver.TaskResult(TaskRegionObserver.TaskResultCode.SUCCESS, ""); |
| } else if (EnvironmentEdgeManager.currentTimeMillis() < timeMaxInterval + timestamp.getTime()) { |
| // skip this task as it has not been expired and its parent table has not been dropped yet |
| LOGGER.info("Skipping a child view drop task. " + |
| "The parent table has not been dropped yet : " + |
| taskRecord.getSchemaName() + "." + taskRecord.getTableName() + |
| " with tenant id " + (tenantId == null ? " IS NULL" : tenantId) + |
| " and timestamp " + timestamp.toString()); |
| return new TaskRegionObserver.TaskResult(TaskRegionObserver.TaskResultCode.SKIPPED, ""); |
| } |
| else { |
| LOGGER.warn(" A drop child view task has expired and will be marked as failed : " + |
| taskRecord.getSchemaName() + "." + taskRecord.getTableName() + |
| " with tenant id " + (tenantId == null ? " IS NULL" : tenantId) + |
| " and timestamp " + timestamp.toString()); |
| return new TaskRegionObserver.TaskResult(TaskRegionObserver.TaskResultCode.FAIL, "Expired"); |
| } |
| } |
| catch (Throwable t) { |
| LOGGER.error("Exception while dropping a child view task. " + |
| taskRecord.getSchemaName() + "." + taskRecord.getTableName() + |
| " with tenant id " + (taskRecord.getTenantId() == null ? " IS NULL" : taskRecord.getTenantId()) + |
| " and timestamp " + timestamp.toString(), t); |
| return new TaskRegionObserver.TaskResult(TaskRegionObserver.TaskResultCode.FAIL, t.toString()); |
| } finally { |
| if (pconn != null) { |
| try { |
| pconn.close(); |
| } catch (SQLException ignored) { |
| LOGGER.debug("DropChildViewsTask can't close connection", ignored); |
| } |
| } |
| } |
| } |
| |
| public TaskRegionObserver.TaskResult checkCurrentResult(Task.TaskRecord taskRecord) throws Exception { |
| return null; |
| } |
| } |