[GitHub] [carbondata] kumarvishal09 commented on a change in pull request #3281: [WIP]Index server performance improvement

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kumarvishal09 commented on a change in pull request #3281: [WIP]Index server performance improvement
URL: https://github.com/apache/carbondata/pull/3281#discussion_r295091046
 
 

 ##########
 File path: core/src/main/java/org/apache/carbondata/core/indexstore/ExtendedBlockletWrapper.java
 ##########
 @@ -0,0 +1,240 @@
+/*
+ * 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.indexstore;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.DataInput;
+import java.io.DataInputStream;
+import java.io.DataOutput;
+import java.io.DataOutputStream;
+import java.io.IOException;
+import java.io.Serializable;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+import java.util.UUID;
+
+import org.apache.carbondata.common.logging.LogServiceFactory;
+import org.apache.carbondata.core.constants.CarbonCommonConstants;
+import org.apache.carbondata.core.datastore.compression.SnappyCompressor;
+import org.apache.carbondata.core.datastore.filesystem.CarbonFile;
+import org.apache.carbondata.core.datastore.impl.FileFactory;
+import org.apache.carbondata.core.metadata.schema.table.Writable;
+import org.apache.carbondata.core.stream.ExtendedByteArrayInputStream;
+import org.apache.carbondata.core.stream.ExtendedByteArrayOutputStream;
+import org.apache.carbondata.core.stream.ExtendedDataInputStream;
+import org.apache.carbondata.core.util.CarbonProperties;
+import org.apache.carbondata.core.util.CarbonUtil;
+
+import org.apache.log4j.Logger;
+
+/**
+ * class will be used to send extended blocklet object from index executor to index driver
+ * if data size is more than it will be written in temp folder provided by user
+ * and only file name will send, if data size is less then complete data will be send to
+ * index executor
+ */
+public class ExtendedBlockletWrapper implements Writable, Serializable {
+
+  private static final Logger LOGGER =
+      LogServiceFactory.getLogService(ExtendedBlockletWrapper.class.getName());
+
+  private boolean isWrittenToFile;
+
+  private int dataSize;
+
+  private byte[] bytes;
+
+  private static final int BUFFER_SIZE = 8 * 1024 * 1024;
+
+  private static final int BLOCK_SIZE = 256 * 1024 * 1024;
+
+  public ExtendedBlockletWrapper() {
+
+  }
+
+  public ExtendedBlockletWrapper(List<ExtendedBlocklet> extendedBlockletList, String tablePath,
+      String queryId) {
+    Map<String, Short> uniqueLocations = new HashMap<>();
+    byte[] bytes = convertToBytes(tablePath, uniqueLocations, extendedBlockletList);
+    int serializeAllowedSize = Integer.parseInt(CarbonProperties.getInstance()
+        .getProperty(CarbonCommonConstants.CARBON_INDEX_SERVER_SERIALIZATION_THRESHOLD)) * 1024;
+    DataOutputStream stream = null;
+    // if data size is more then data will be written in file and file name will be sent from
+    // executor to driver, in case of any failure data will send through network
+    if (bytes.length > serializeAllowedSize) {
+      final String fileName = UUID.randomUUID().toString();
+      String folderPath = CarbonUtil.getIndexServerTempPath(tablePath, queryId);
+      try {
+        final CarbonFile carbonFile = FileFactory.getCarbonFile(folderPath);
+        boolean writeToFile = false;
+        if (carbonFile.isFileExist(folderPath)) {
+          writeToFile = true;
 
 Review comment:
   fixed

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