/**
* 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.physical.impl.xsort;
import java.util.List;
import org.apache.drill.common.config.DrillConfig;
import org.apache.drill.common.exceptions.ExecutionSetupException;
import org.apache.drill.exec.ExecConstants;
import org.apache.drill.exec.ops.FragmentContext;
import org.apache.drill.exec.physical.config.ExternalSort;
import org.apache.drill.exec.physical.impl.BatchCreator;
import org.apache.drill.exec.record.AbstractRecordBatch;
import org.apache.drill.exec.record.RecordBatch;
import org.apache.drill.exec.server.options.OptionManager;
import com.google.common.base.Preconditions;
public class ExternalSortBatchCreator implements BatchCreator<ExternalSort>{
@Override
public AbstractRecordBatch<ExternalSort> getBatch(FragmentContext context, ExternalSort config, List<RecordBatch> children)
throws ExecutionSetupException {
Preconditions.checkArgument(children.size() == 1);
// Prefer the managed version, but provide runtime and boot-time options
// to disable it and revert to the "legacy" version. The legacy version
// is retained primarily to allow cross-check testing against the managed
// version, and as a fall back in the first release of the managed version.
OptionManager optionManager = context.getOptions();
boolean disableManaged = optionManager.getOption(ExecConstants.EXTERNAL_SORT_DISABLE_MANAGED_OPTION);
if ( ! disableManaged ) {
DrillConfig drillConfig = context.getConfig();
disableManaged = drillConfig.hasPath(ExecConstants.EXTERNAL_SORT_DISABLE_MANAGED) &&
drillConfig.getBoolean(ExecConstants.EXTERNAL_SORT_DISABLE_MANAGED);
}
if (disableManaged) {
return new ExternalSortBatch(config, context, children.iterator().next());
} else {
return new org.apache.drill.exec.physical.impl.xsort.managed.ExternalSortBatch(config, context, children.iterator().next());
}
}
}