| /* |
| * 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.drill.exec.store.hive.client; |
| |
| import java.util.List; |
| import java.util.stream.Collectors; |
| |
| import org.apache.drill.common.AutoCloseables; |
| import org.apache.drill.exec.store.hive.ColumnListsCache; |
| import org.apache.drill.exec.store.hive.HiveReadEntry; |
| import org.apache.drill.exec.store.hive.HiveTableWithColumnCache; |
| import org.apache.drill.exec.store.hive.HiveTableWrapper; |
| import org.apache.drill.exec.store.hive.HiveUtilities; |
| import org.apache.drill.shaded.guava.com.google.common.cache.CacheLoader; |
| import org.apache.hadoop.hive.metastore.api.MetaException; |
| import org.apache.hadoop.hive.metastore.api.NoSuchObjectException; |
| import org.apache.hadoop.hive.metastore.api.Partition; |
| import org.apache.hadoop.hive.metastore.api.Table; |
| import org.apache.hadoop.hive.metastore.api.UnknownTableException; |
| import org.apache.thrift.TException; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * CacheLoader that synchronized on client and tries to reconnect when |
| * client fails. Used by {@link HiveMetadataCache}. |
| */ |
| final class TableEntryCacheLoader extends CacheLoader<TableName, HiveReadEntry> { |
| |
| private static final Logger logger = LoggerFactory.getLogger(TableEntryCacheLoader.class); |
| |
| private final DrillHiveMetaStoreClient client; |
| |
| TableEntryCacheLoader(DrillHiveMetaStoreClient client) { |
| this.client = client; |
| } |
| |
| |
| @Override |
| @SuppressWarnings("NullableProblems") |
| public HiveReadEntry load(TableName key) throws Exception { |
| Table table; |
| List<Partition> partitions; |
| synchronized (client) { |
| table = getTable(key); |
| partitions = getPartitions(key); |
| } |
| HiveTableWithColumnCache hiveTable = new HiveTableWithColumnCache(table, new ColumnListsCache(table)); |
| List<HiveTableWrapper.HivePartitionWrapper> partitionWrappers = getPartitionWrappers(partitions, hiveTable); |
| return new HiveReadEntry(new HiveTableWrapper(hiveTable), partitionWrappers); |
| } |
| |
| private List<HiveTableWrapper.HivePartitionWrapper> getPartitionWrappers(List<Partition> partitions, HiveTableWithColumnCache hiveTable) { |
| if (partitions.isEmpty()) { |
| return null; |
| } |
| return partitions.stream() |
| .map(partition -> HiveUtilities.createPartitionWithSpecColumns(hiveTable, partition)) |
| .collect(Collectors.toList()); |
| } |
| |
| private List<Partition> getPartitions(TableName key) throws TException { |
| List<Partition> partitions; |
| try { |
| partitions = client.listPartitions(key.getDbName(), key.getTableName(), (short) -1); |
| } catch (NoSuchObjectException | MetaException e) { |
| throw e; |
| } catch (TException e) { |
| logger.warn("Failure while attempting to get hive partitions. Retries once. ", e); |
| AutoCloseables.closeSilently(client::close); |
| client.reconnect(); |
| partitions = client.listPartitions(key.getDbName(), key.getTableName(), (short) -1); |
| } |
| return partitions; |
| } |
| |
| private Table getTable(TableName key) throws TException { |
| Table table; |
| try { |
| table = client.getTable(key.getDbName(), key.getTableName()); |
| } catch (MetaException | NoSuchObjectException e) { |
| throw e; |
| } catch (TException e) { |
| logger.warn("Failure while attempting to get hive table. Retries once. ", e); |
| AutoCloseables.closeSilently(client::close); |
| client.reconnect(); |
| table = client.getTable(key.getDbName(), key.getTableName()); |
| } |
| |
| if (table == null) { |
| throw new UnknownTableException(String.format("Unable to find table '%s'.", key.getTableName())); |
| } |
| return table; |
| } |
| |
| } |