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SearchModeVectorDetailQueryExecutor.java
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SearchModeVectorDetailQueryExecutor.java
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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.carbondata.core.scan.executor.impl;
import java.io.IOException;
import java.util.List;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import org.apache.carbondata.common.CarbonIterator;
import org.apache.carbondata.common.logging.LogService;
import org.apache.carbondata.common.logging.LogServiceFactory;
import org.apache.carbondata.core.scan.executor.exception.QueryExecutionException;
import org.apache.carbondata.core.scan.executor.infos.BlockExecutionInfo;
import org.apache.carbondata.core.scan.model.QueryModel;
import org.apache.carbondata.core.scan.result.iterator.SearchModeVectorResultIterator;
import org.apache.carbondata.core.util.CarbonProperties;
import static org.apache.carbondata.core.constants.CarbonCommonConstants.CARBON_SEARCH_MODE_SCAN_THREAD;
import org.apache.hadoop.conf.Configuration;
/**
* Below class will be used to execute the detail query and returns columnar vectors.
*/
public class SearchModeVectorDetailQueryExecutor extends AbstractQueryExecutor<Object> {
private static final LogService LOGGER =
LogServiceFactory.getLogService(SearchModeVectorDetailQueryExecutor.class.getName());
private static ExecutorService executorService = null;
public SearchModeVectorDetailQueryExecutor(Configuration configuration) {
super(configuration);
if (executorService == null) {
initThreadPool();
}
}
private static synchronized void initThreadPool() {
int defaultValue = Runtime.getRuntime().availableProcessors();
int nThread;
try {
nThread = Integer.parseInt(CarbonProperties.getInstance()
.getProperty(CARBON_SEARCH_MODE_SCAN_THREAD, String.valueOf(defaultValue)));
} catch (NumberFormatException e) {
nThread = defaultValue;
LOGGER.warn("The " + CARBON_SEARCH_MODE_SCAN_THREAD + " is invalid. "
+ "Using the default value " + nThread);
}
if (nThread > 0) {
executorService = Executors.newFixedThreadPool(nThread);
} else {
executorService = Executors.newCachedThreadPool();
}
}
public static synchronized void shutdownThreadPool() {
// shutdown all threads immediately
if (executorService != null) {
executorService.shutdownNow();
executorService = null;
}
}
@Override
public CarbonIterator<Object> execute(QueryModel queryModel)
throws QueryExecutionException, IOException {
List<BlockExecutionInfo> blockExecutionInfoList = getBlockExecutionInfos(queryModel);
this.queryIterator = new SearchModeVectorResultIterator(
blockExecutionInfoList,
queryModel,
executorService
);
return this.queryIterator;
}
}