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/*
* 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;
}
}
}
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