Github user kunal642 commented on a diff in the pull request:
https://github.com/apache/carbondata/pull/2484#discussion_r203071359
--- Diff:
core/src/main/java/org/apache/carbondata/core/util/CarbonConfiguration.java ---
@@ -0,0 +1,74 @@
+/*
+ * 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.util;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.ObjectInputStream;
+import java.io.ObjectOutputStream;
+import java.io.Serializable;
+
+import org.apache.carbondata.core.datastore.compression.CompressorFactory;
+
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.fs.Path;
+
+public class CarbonConfiguration implements Serializable {
+
+ private static final long serialVersionUID = 3811544264223154007L;
+ private transient Configuration configuration;
+ private byte[] confBytes;
+
+ public CarbonConfiguration(Configuration configuration) {
+ ByteArrayOutputStream bao = new ByteArrayOutputStream();
+ try {
+ ObjectOutputStream oos = new ObjectOutputStream(bao);
+ configuration.write(oos);
+ oos.close();
+ this.confBytes =
+
CompressorFactory.getInstance().getCompressor().compressByte(bao.toByteArray());
+ } catch (IOException e) {
+ throw new RuntimeException(e);
+ }
+ }
+
+ public CarbonConfiguration() {
+ this.configuration = new Configuration();
+ configuration.addResource(new Path("../core-default.xml"));
+ }
+
+ public Configuration getConfiguration() {
--- End diff --
Once CarbonConfiguration is set into ThreadLocal only FileFactory and
CarbonRDD will try to deserialize the configuration. This will be done once per
instance of CarbonConfiguration. If configuration is already deserialized we
will return the same object.
---
