Github user gvramana commented on a diff in the pull request:
https://github.com/apache/carbondata/pull/2391#discussion_r200014323
--- Diff:
core/src/main/java/org/apache/carbondata/core/scan/executor/impl/SDKDetailQueryExecutor.java
---
@@ -0,0 +1,87 @@
+/*
+ * 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.constants.CarbonCommonConstants;
+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.SearchModeResultIterator;
+import org.apache.carbondata.core.util.CarbonProperties;
+
+/**
+ * It's for SDK carbon reader to execute the detail query
+ */
+public class SDKDetailQueryExecutor extends AbstractQueryExecutor<Object> {
+ private static final LogService LOGGER =
+
LogServiceFactory.getLogService(SDKDetailQueryExecutor.class.getName());
+ private static ExecutorService executorService = null;
+
+ public SDKDetailQueryExecutor() {
+ if (executorService == null) {
+ initThreadPool();
+ }
+ }
+
+ private static synchronized void initThreadPool() {
+ int defaultValue = Runtime.getRuntime().availableProcessors();
+ int nThread;
+ try {
+ nThread = Integer.parseInt(CarbonProperties.getInstance()
+ .getProperty(CarbonCommonConstants.CARBON_READER_THREAD,
+ String.valueOf(defaultValue)));
+ } catch (NumberFormatException e) {
+ nThread = defaultValue;
+ LOGGER.warn("The " + CarbonCommonConstants.CARBON_READER_THREAD
+ + " is invalid. Using the default value " + nThread);
+ }
+ if (nThread > 0) {
+ executorService = Executors.newFixedThreadPool(nThread);
+ } else {
+ executorService = Executors.newCachedThreadPool();
+ }
+ }
+
+ public static synchronized void shutdownThreadPool() {
+ if (executorService != null) {
+ executorService.shutdownNow();
--- End diff --
Static one we cannot shutdown, as another CarbonReader might be reading
same or different table in same process
---
