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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.mapr.db;
import java.io.IOException;
import java.util.List;
import java.util.Set;
import org.apache.drill.common.expression.SchemaPath;
import org.apache.drill.common.logical.StoragePluginConfig;
import org.apache.drill.exec.physical.base.AbstractGroupScan;
import org.apache.drill.exec.server.DrillbitContext;
import org.apache.drill.exec.store.StoragePluginOptimizerRule;
import org.apache.drill.exec.store.dfs.FileSelection;
import org.apache.drill.exec.store.dfs.FormatMatcher;
import org.apache.drill.exec.store.hbase.HBaseScanSpec;
import org.apache.drill.exec.store.mapr.TableFormatPlugin;
import org.apache.drill.exec.store.mapr.db.binary.BinaryTableGroupScan;
import org.apache.drill.exec.store.mapr.db.json.JsonScanSpec;
import org.apache.drill.exec.store.mapr.db.json.JsonTableGroupScan;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.client.Connection;
import org.apache.hadoop.hbase.client.ConnectionFactory;
import com.fasterxml.jackson.annotation.JsonIgnore;
import com.google.common.collect.ImmutableSet;
import com.mapr.fs.tables.TableProperties;
public class MapRDBFormatPlugin extends TableFormatPlugin {
static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(MapRDBFormatPlugin.class);
private final MapRDBFormatMatcher matcher;
private final Configuration hbaseConf;
private final Connection connection;
public MapRDBFormatPlugin(String name, DrillbitContext context, Configuration fsConf,
StoragePluginConfig storageConfig, MapRDBFormatPluginConfig formatConfig) throws IOException {
super(name, context, fsConf, storageConfig, formatConfig);
matcher = new MapRDBFormatMatcher(this);
hbaseConf = HBaseConfiguration.create(fsConf);
hbaseConf.set(ConnectionFactory.DEFAULT_DB, ConnectionFactory.MAPR_ENGINE2);
connection = ConnectionFactory.createConnection(hbaseConf);
}
@Override
public FormatMatcher getMatcher() {
return matcher;
}
@Override
@JsonIgnore
public Set<StoragePluginOptimizerRule> getOptimizerRules() {
return ImmutableSet.of(MapRDBPushFilterIntoScan.FILTER_ON_SCAN, MapRDBPushFilterIntoScan.FILTER_ON_PROJECT);
}
@Override
public AbstractGroupScan getGroupScan(String userName, FileSelection selection,
List<SchemaPath> columns) throws IOException {
String tableName = getTableName(selection);
TableProperties props = getMaprFS().getTableProperties(new Path(tableName));
if (props.getAttr().getJson()) {
JsonScanSpec scanSpec = new JsonScanSpec(tableName, null/*condition*/);
return new JsonTableGroupScan(userName, getStoragePlugin(), this, scanSpec, columns);
} else {
HBaseScanSpec scanSpec = new HBaseScanSpec(tableName);
return new BinaryTableGroupScan(userName, getStoragePlugin(), this, scanSpec, columns);
}
}
@JsonIgnore
public Configuration getHBaseConf() {
return hbaseConf;
}
@JsonIgnore
public Connection getConnection() {
return connection;
}
/**
* Allows to get a table name from FileSelection object
*
* @param selection File selection object
* @return string table name
*/
@JsonIgnore
public String getTableName(FileSelection selection) {
List<String> files = selection.getFiles();
assert (files.size() == 1);
return files.get(0);
}
}
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