/*
* Copyright © 2014 Cask Data, Inc.
*
* Licensed 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 co.cask.cdap.explore.service.hive;
import co.cask.cdap.common.conf.CConfiguration;
import co.cask.cdap.common.conf.Constants;
import co.cask.cdap.data2.dataset2.DatasetFramework;
import co.cask.cdap.explore.service.ExploreException;
import co.cask.cdap.explore.service.HandleNotFoundException;
import co.cask.cdap.proto.QueryStatus;
import co.cask.tephra.TransactionSystemClient;
import com.google.common.base.Throwables;
import com.google.common.collect.ImmutableMap;
import com.google.inject.Inject;
import com.google.inject.name.Named;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hive.conf.HiveConf;
import org.apache.hive.service.cli.CLIService;
import org.apache.hive.service.cli.HiveSQLException;
import org.apache.hive.service.cli.OperationHandle;
import org.apache.hive.service.cli.OperationState;
import org.apache.hive.service.cli.SessionHandle;
import java.io.File;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
/**
* Hive 12 implementation of {@link co.cask.cdap.explore.service.ExploreService}.
* There are 2 changes compared to Hive 13 implementation -
* <ol>
* <li>{@link CLIService#getOperationStatus(org.apache.hive.service.cli.OperationHandle)} return type has
* changed</li>
* <li>{@link CLIService#fetchResults(org.apache.hive.service.cli.OperationHandle)} return type has changed</li>
* </ol>
*/
@SuppressWarnings("UnusedDeclaration")
public class Hive12ExploreService extends BaseHiveExploreService {
@Inject
public Hive12ExploreService(TransactionSystemClient txClient, DatasetFramework datasetFramework,
CConfiguration cConf, Configuration hConf, HiveConf hiveConf,
@Named(Constants.Explore.PREVIEWS_DIR_NAME) File previewsDir) {
super(txClient, datasetFramework, cConf, hConf, hiveConf, previewsDir);
}
@Override
protected QueryStatus fetchStatus(OperationHandle operationHandle)
throws HiveSQLException, ExploreException, HandleNotFoundException {
try {
// In Hive 12, CLIService.getOperationStatus returns OperationState.
// In Hive 13, CLIService.getOperationStatus returns OperationStatus.
// Since we use Hive 13 for dev, we need the following workaround to get Hive 12 working.
Class cliServiceClass = getCliService().getClass();
Method m = cliServiceClass.getMethod("getOperationStatus", OperationHandle.class);
OperationState operationState = (OperationState) m.invoke(getCliService(), operationHandle);
return new QueryStatus(QueryStatus.OpStatus.valueOf(operationState.toString()), operationHandle.hasResultSet());
} catch (InvocationTargetException e) {
throw Throwables.propagate(e);
} catch (NoSuchMethodException e) {
throw Throwables.propagate(e);
} catch (IllegalAccessException e) {
throw Throwables.propagate(e);
}
}
@Override
protected OperationHandle doExecute(SessionHandle sessionHandle, String statement)
throws HiveSQLException, ExploreException {
return getCliService().executeStatementAsync(sessionHandle, statement, ImmutableMap.<String, String>of());
}
}