| /* |
| * 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.hbase.config; |
| |
| import java.io.IOException; |
| import java.util.Map; |
| |
| import org.apache.drill.common.exceptions.DrillRuntimeException; |
| import org.apache.drill.exec.exception.StoreException; |
| import org.apache.drill.exec.store.hbase.DrillHBaseConstants; |
| import org.apache.drill.exec.store.sys.PersistentStore; |
| import org.apache.drill.exec.store.sys.PersistentStoreConfig; |
| import org.apache.drill.exec.store.sys.PersistentStoreRegistry; |
| import org.apache.drill.exec.store.sys.store.provider.BasePersistentStoreProvider; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.hbase.HBaseConfiguration; |
| import org.apache.hadoop.hbase.HColumnDescriptor; |
| import org.apache.hadoop.hbase.HConstants; |
| import org.apache.hadoop.hbase.HTableDescriptor; |
| import org.apache.hadoop.hbase.TableName; |
| import org.apache.hadoop.hbase.client.Admin; |
| import org.apache.hadoop.hbase.client.Connection; |
| import org.apache.hadoop.hbase.client.ConnectionFactory; |
| import org.apache.hadoop.hbase.client.Table; |
| import org.apache.hadoop.hbase.util.Bytes; |
| |
| import com.google.common.annotations.VisibleForTesting; |
| |
| public class HBasePersistentStoreProvider extends BasePersistentStoreProvider { |
| private static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(HBasePersistentStoreProvider.class); |
| |
| static final byte[] FAMILY = Bytes.toBytes("s"); |
| |
| static final byte[] QUALIFIER = Bytes.toBytes("d"); |
| |
| private final TableName hbaseTableName; |
| |
| private Configuration hbaseConf; |
| |
| private Connection connection; |
| |
| private Table hbaseTable; |
| |
| public HBasePersistentStoreProvider(PersistentStoreRegistry registry) { |
| @SuppressWarnings("unchecked") |
| final Map<String, Object> config = (Map<String, Object>) registry.getConfig().getAnyRef(DrillHBaseConstants.SYS_STORE_PROVIDER_HBASE_CONFIG); |
| this.hbaseConf = HBaseConfiguration.create(); |
| this.hbaseConf.set(HConstants.HBASE_CLIENT_INSTANCE_ID, "drill-hbase-persistent-store-client"); |
| if (config != null) { |
| for (Map.Entry<String, Object> entry : config.entrySet()) { |
| this.hbaseConf.set(entry.getKey(), String.valueOf(entry.getValue())); |
| } |
| } |
| this.hbaseTableName = TableName.valueOf(registry.getConfig().getString(DrillHBaseConstants.SYS_STORE_PROVIDER_HBASE_TABLE)); |
| } |
| |
| @VisibleForTesting |
| public HBasePersistentStoreProvider(Configuration conf, String storeTableName) { |
| this.hbaseConf = conf; |
| this.hbaseTableName = TableName.valueOf(storeTableName); |
| } |
| |
| |
| |
| @Override |
| public <V> PersistentStore<V> getOrCreateStore(PersistentStoreConfig<V> config) throws StoreException { |
| switch(config.getMode()){ |
| case BLOB_PERSISTENT: |
| case PERSISTENT: |
| return new HBasePersistentStore<>(config, this.hbaseTable); |
| |
| default: |
| throw new IllegalStateException(); |
| } |
| } |
| |
| |
| @Override |
| public void start() throws IOException { |
| this.connection = ConnectionFactory.createConnection(hbaseConf); |
| |
| try(Admin admin = connection.getAdmin()) { |
| if (!admin.tableExists(hbaseTableName)) { |
| HTableDescriptor desc = new HTableDescriptor(hbaseTableName); |
| desc.addFamily(new HColumnDescriptor(FAMILY).setMaxVersions(1)); |
| admin.createTable(desc); |
| } else { |
| HTableDescriptor desc = admin.getTableDescriptor(hbaseTableName); |
| if (!desc.hasFamily(FAMILY)) { |
| throw new DrillRuntimeException("The HBase table " + hbaseTableName |
| + " specified as persistent store exists but does not contain column family: " |
| + (Bytes.toString(FAMILY))); |
| } |
| } |
| } |
| |
| this.hbaseTable = connection.getTable(hbaseTableName); |
| } |
| |
| @Override |
| public synchronized void close() { |
| if (this.hbaseTable != null) { |
| try { |
| this.hbaseTable.close(); |
| this.hbaseTable = null; |
| } catch (IOException e) { |
| logger.warn("Caught exception while closing HBase table.", e); |
| } |
| } |
| if (this.connection != null && !this.connection.isClosed()) { |
| try { |
| this.connection.close(); |
| } catch (IOException e) { |
| logger.warn("Caught exception while closing HBase connection.", e); |
| } |
| this.connection = null; |
| } |
| } |
| |
| } |