Github user sounakr commented on a diff in the pull request:
https://github.com/apache/carbondata/pull/1152#discussion_r126936641
--- Diff:
integration/spark2/src/main/java/org/apache/carbondata/spark/dictionary/client/SecureDictionaryClientHandler.java
---
@@ -0,0 +1,122 @@
+/*
+ * 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.spark.dictionary.client;
+
+import java.nio.ByteBuffer;
+import java.util.concurrent.BlockingQueue;
+import java.util.concurrent.LinkedBlockingQueue;
+
+import org.apache.carbondata.common.logging.LogService;
+import org.apache.carbondata.common.logging.LogServiceFactory;
+import
org.apache.carbondata.core.dictionary.generator.key.DictionaryMessage;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.ByteBufAllocator;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.ChannelFuture;
+import io.netty.channel.ChannelFutureListener;
+import io.netty.channel.ChannelHandlerContext;
+import org.apache.spark.network.client.RpcResponseCallback;
+import org.apache.spark.network.client.TransportClient;
+import org.apache.spark.network.server.OneForOneStreamManager;
+import org.apache.spark.network.server.RpcHandler;
+import org.apache.spark.network.server.StreamManager;
+
+/**
+ * Client handler to get data.
+ */
+public class SecureDictionaryClientHandler extends RpcHandler {
+
+ private static final LogService LOGGER =
+
LogServiceFactory.getLogService(SecureDictionaryClientHandler.class.getName());
+
+ private final BlockingQueue<DictionaryMessage> responseMsgQueue = new
LinkedBlockingQueue<>();
+
+ private ChannelHandlerContext ctx;
+
+ private DictionaryChannelFutureListener channelFutureListener;
+
+ /**
+ * client send request to server
+ *
+ * @param key DictionaryMessage
+ * @return DictionaryMessage
+ */
+ public DictionaryMessage getDictionary(DictionaryMessage key,
TransportClient client) {
+ DictionaryMessage dictionaryMessage;
+ ByteBuffer resp = null;
+ try {
+
+ ByteBuf buffer = ByteBufAllocator.DEFAULT.heapBuffer();
+ key.writeData(buffer);
+ resp = client.sendRpcSync(buffer.nioBuffer(), 100000);
+ } catch (Exception e) {
+ LOGGER.error(e, "Error while send request to server ");
+ }
+ try {
+ ByteBuf data = Unpooled.wrappedBuffer(resp);
+ DictionaryMessage key1 = new DictionaryMessage();
+ if (data == null) {
+ StringBuilder message = new StringBuilder();
+ message.append("DictionaryMessage { ColumnName:
").append(key1.getColumnName())
+ .append(", DictionaryValue:
").append(key1.getDictionaryValue()).append(", type: ")
+ .append(key1.getType());
+ throw new RuntimeException("Request timed out for key : " +
message);
+ }
+ key1.readSecureData(data);
+ data.release();
+ return key1;
+ } catch (Exception e) {
+ LOGGER.error(e);
+ throw new RuntimeException(e);
+ }
+ }
+
+ @Override public void receive(TransportClient transportClient,
ByteBuffer byteBuffer,
+ RpcResponseCallback rpcResponseCallback) {
+ try {
+ ByteBuf data = Unpooled.wrappedBuffer(byteBuffer);
+ DictionaryMessage key = new DictionaryMessage();
+ key.readSecureData(data);
+ data.release();
+ responseMsgQueue.offer(key);
+ } catch (Exception e) {
+ LOGGER.error(e);
+ throw e;
+ }
+ }
+
+ @Override public StreamManager getStreamManager() {
+ return new OneForOneStreamManager();
+ }
+
+ private static class DictionaryChannelFutureListener implements
ChannelFutureListener {
--- End diff --
Done
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