Github user chandrasaripaka commented on a diff in the pull request:
https://github.com/apache/carbondata/pull/2161#discussion_r241983388
--- Diff:
core/src/main/java/org/apache/carbondata/core/locks/AlluxioFileLock.java ---
@@ -0,0 +1,112 @@
+/*
+ * 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.locks;
+
+import java.io.DataOutputStream;
+import java.io.IOException;
+
+import org.apache.carbondata.common.logging.LogServiceFactory;
+import org.apache.carbondata.core.datastore.filesystem.AlluxioCarbonFile;
+import org.apache.carbondata.core.datastore.impl.FileFactory;
+import org.apache.carbondata.core.metadata.AbsoluteTableIdentifier;
+import org.apache.carbondata.core.util.path.CarbonTablePath;
+
+import org.apache.log4j.Logger;
+
+/**
+ * This class is used to handle the S3 File locking.
+ * This is acheived using the concept of acquiring the data out stream
using Append option.
+ */
+public class AlluxioFileLock extends AbstractCarbonLock {
--- End diff --
Understand , will just extend from that.
---
